阅读说明：本技术 一种物镜加工装置 (Objective lens machining device ) 是由 郎松 巩岩 胡慧杰 张艳微 王宏伟 于 2020-12-04 设计创作，主要内容包括：本发明涉及光学镜片制造技术领域,具体提供一种物镜加工装置,包括：机床,设在机床上的机床主轴；六轴并联位移台,固定在所述机床主轴上；所述六轴并联位移台供物镜安装；靶标,与所述六轴并联位移台相对分布；图像采集组件,用于采集所述靶标通过安装于所述六轴并联位移台的物镜所成的像；控制机构,与所述图像采集组件、六轴并联位移台电连接,控制所述六轴并联位移台运动,以使所述六轴并联位移台调整所述物镜的位置。控制机构控制六轴并联位移台运动,以能够调整物镜相对机床主轴的位置,通过六轴并联位移台自动地对物镜位置的调整,使得物镜的光轴与机床主轴的轴线进行自动的重合调整。(The invention relates to the technical field of optical lens manufacturing, and particularly provides an objective lens processing device, which comprises: a machine tool, a machine tool spindle provided on the machine tool; the six-axis parallel displacement table is fixed on the machine tool main shaft; the six-axis parallel displacement table is used for mounting an objective lens; the targets are distributed opposite to the six-axis parallel displacement table; the image acquisition assembly is used for acquiring an image of the target through an objective lens arranged on the six-axis parallel displacement table; and the control mechanism is electrically connected with the image acquisition assembly and the six-axis parallel displacement table and controls the six-axis parallel displacement table to move so that the six-axis parallel displacement table adjusts the position of the objective lens. The control mechanism controls the six-axis parallel displacement table to move so as to adjust the position of the objective lens relative to the machine tool spindle, and the six-axis parallel displacement table automatically adjusts the position of the objective lens, so that the optical axis of the objective lens and the axis of the machine tool spindle are automatically superposed and adjusted.)

1. An objective lens machining apparatus, comprising:

a machine tool (1), a machine tool spindle (11) provided on the machine tool (1);

the six-axis parallel displacement table (2) is fixed on the machine tool spindle (11); the six-axis parallel displacement table (2) is used for mounting an objective lens (5) so as to drive the objective lens (5) to do pitching tilting motion and radial translation motion;

the targets (3) are distributed opposite to the six-axis parallel displacement table (2);

the image acquisition assembly (4) is used for acquiring the image of the target (3) on an objective lens (5) arranged on the six-axis parallel displacement table (2);

and the control mechanism is electrically connected with the image acquisition assembly (4) and the six-axis parallel displacement table (2) and controls the six-axis parallel displacement table (2) to move so that the six-axis parallel displacement table (2) adjusts the position of the objective lens (5).

2. The objective lens machining device according to claim 1, further comprising an adapter (6) fixed on the six-axis parallel displacement table (2), wherein the adapter (6) has a circular mounting shaft (61), and the mounting shaft (61) is used for sleeving an inner hole of the objective lens (5).

3. The objective lens processing apparatus according to claim 1 or 2,

the image acquisition assembly (4) and the six-axis parallel displacement table (2) are respectively fixed on two ends of the machine tool spindle (11);

the image acquisition assembly (4) comprises a tube lens (41) and a camera (42); the tube mirror (41) is coaxially and rotatably inserted into an inner cavity of the machine tool spindle (11);

the optical axis of the camera (42) and the tube mirror (41) are coaxially arranged on the tube mirror (41) and are positioned outside the machine tool spindle (11).

4. The objective machining device according to any one of claims 1 to 3, further comprising an adjustment mechanism (7) provided on the machine tool (1), the target (3) being fixed to the adjustment mechanism (7), the adjustment mechanism (7) being configured to adjust a pitch tilt angle and a radial position of the target (3).

5. The objective lens processing apparatus according to claim 4, wherein the adjusting mechanism (7) includes a multidimensional adjusting frame (71) and a moving mechanism;

the target (3) is mounted on the multi-dimensional adjustable frame (71); the multi-dimensional adjusting frame (71) is used for adjusting the pitch inclination angle and the radial position of the target (3);

the multidimensional adjusting frame (71) is arranged on the moving mechanism, and the moving mechanism drives the multidimensional adjusting frame (71) to slide on a horizontal plane in a reciprocating mode.

6. The objective lens machining device according to claim 5, wherein the moving mechanism includes a first guide rail (72) extending in an axial direction of the machine tool spindle (11); and a second guide rail (73) extending in the radial direction of the machine tool spindle (11);

the second guide rail (73) is slidably arranged on the first guide rail (72), and the multi-dimensional adjusting frame (71) is fixed on the second guide rail (73).

7. The objective lens machining device according to claim 5 or 6, further comprising a turning tool (8) fixed on the moving mechanism, wherein the turning tool (8) comprises a threading tool (82) and an excircle turning tool (81), and the threading tool (82) and the excircle turning tool (81) are respectively spaced from the multidimensional adjusting frame (71) along a radial direction of the machine tool spindle (11).

8. The objective machining device according to claim 7, further comprising a laser tool setting gauge (9) provided between the target (3) and the six-axis parallel displacement stage.

9. The objective lens machining device according to any one of claims 5 to 8, further comprising a hollow housing (10), the housing (10) being fixed to the moving mechanism;

an illuminating component (101) is arranged in the shell (10), a cylindrical mounting cylinder (102) is fixed at the inner side end of the target (3), the mounting cylinder (102) is fixedly connected with the multi-dimensional adjusting frame (71), and the outer side end of the mounting cylinder (102) penetrates through an opening of the shell (10); the target (3) is fixed on the outer end face of the mounting cylinder (102).

Technical Field

The invention relates to the technical field of optical lens manufacturing, and particularly provides an objective lens processing device.

Background

The centering and parfocal of the objective lens is a key process for objective lens manufacture. The step of procedure is that after all the lenses and the outer lens cone of the objective lens are assembled, the outer lens cone of the semi-finished objective lens is turned, and the parfocal screw thread for mounting the objective lens is processed, so as to ensure that the processed objective lens meets the international standard and interchangeability requirement, on one hand, the centering requirement is required to be met, namely, the mechanical axis of the parfocal screw thread is coincided with the optical axis of the objective lens; on the other hand, the requirement of parfocal is required, the parfocal distance refers to the distance from the positioning surface of the parfocal thread to the focal plane of the objective lens, and the parfocal distance is required to be in accordance with the international standard value of 45.06 +/-0.005 mm.

The prior art discloses a device for centering and parfocal of an objective lens, which specifically comprises: referring to fig. 10, the objective lens machining device comprises a machine tool spindle and a fixed shaft penetrating through the machine tool spindle, wherein a bowl-shaped part is arranged at the right end of the fixed shaft, the interior of the machine tool spindle is a hollow cavity, a bowl-shaped mounting groove is arranged on the end surface of the right end of the machine tool spindle, the interior of the fixed shaft is a second hollow cavity, and a mounting shaft is mounted in the second hollow cavity, and the right end of the mounting shaft extends out of a notch of the mounting groove so as to be sleeved with an; the left end of the fixed shaft extends into a hollow cavity of a machine tool spindle, so that a contact position of the fixed shaft and the bottom of the mounting groove forms a swing fulcrum 104; and a plurality of mounting holes are arranged in the radial direction of the machine tool spindle, an adjusting bolt is arranged in each mounting hole, the inner side end of each adjusting bolt abuts against the outer wall surface of the fixed shaft, the outer side end of each adjusting bolt is positioned outside the machine tool spindle, and a locking nut is arranged.

In the centering process, if the pitch angle of the objective lens to be processed needs to be adjusted, a person manually loosens the locking nut, and the bowl-shaped part of the fixing shaft swings in the mounting groove by swinging or rotating the fixing shaft so as to adjust the pitch angle of the objective lens, so that the main shaft of the machine tool is adjusted to be parallel to the main shaft of the objective lens; in view of the radial restriction effect of the swing fulcrum on the fixed shaft, the optical axis of the objective lens can only be adjusted along the axial direction of the machine tool spindle, but cannot be adjusted along the radial direction, so the spindle of the objective lens in fig. 10 can only be adjusted parallel to the rotating machine tool spindle, and the axes of the two can not be adjusted and overlapped, thereby affecting the centering precision of the objective lens parfocal screw. Meanwhile, when the objective lens is adjusted, a manual centering adjustment mode is adopted, so that the centering adjustment efficiency is low, an error exists, and the centering precision is low.

Further, as shown in fig. 10, when the device measures the distance between the tip of the turning tool and the positioning surface of the parfocal thread, a measuring scale is adopted, and the manual measurement has errors, so that it is difficult to ensure that the parfocal distance of the processed objective lens meets the requirement.

Disclosure of Invention

Therefore, the invention provides an objective lens processing device, which firstly solves the problem that the objective lens processing device cannot realize the adjustment of the superposition of an objective lens main shaft and a machine tool main shaft; and the manual adjustment mode also influences the accuracy of centering.

An objective lens machining apparatus comprising: a machine tool, a machine tool spindle provided on the machine tool; the six-axis parallel displacement table is fixed on the machine tool main shaft; the six-axis parallel displacement table is used for mounting an objective lens so as to drive the objective lens to do pitching tilting motion and radial translation motion; the targets are distributed opposite to the six-axis parallel displacement table; the image acquisition assembly is used for acquiring the imaging of the target on an objective lens arranged on the six-axis parallel displacement table; and the control mechanism is electrically connected with the image acquisition assembly and the six-axis parallel displacement table and controls the six-axis parallel displacement table to move so that the six-axis parallel displacement table adjusts the position of the objective lens.

Optionally, in the structure of the objective lens machining device, the objective lens machining device further comprises an adapter fixed on the six-axis parallel displacement table, a circular installation shaft is arranged on the adapter, and the installation shaft is used for sleeving an inner hole of the objective lens.

Optionally, in the structure of the objective lens machining device, the image acquisition assembly and the six-axis parallel displacement table are respectively fixed at two ends of the machine tool spindle;

the image acquisition assembly comprises a tube lens and a camera; the tube mirror is coaxially and rotatably inserted in an inner cavity of the machine tool spindle;

the optical axis of the camera and the tube mirror are coaxially arranged on the tube mirror and are positioned outside the machine tool spindle.

Optionally, the objective lens processing device structure further includes an adjusting mechanism disposed on the machine tool, the target is fixed on the adjusting mechanism, and the adjusting mechanism is configured to adjust the pitch tilt angle and the radial position of the target.

Optionally, in the structure of the objective lens processing apparatus, the adjusting mechanism includes a multidimensional adjusting frame and a moving mechanism;

the target is arranged on the multi-dimensional adjusting frame; the multi-dimensional adjusting frame is used for adjusting the pitching inclination angle and the radial position of the target;

the multi-dimensional adjusting frame is installed on the moving mechanism, and the moving mechanism drives the multi-dimensional adjusting frame to slide on the horizontal plane in a reciprocating mode.

Optionally, in the above configuration of the objective lens machining apparatus, the moving mechanism includes a first guide rail extending in an axial direction of the machine tool spindle; and a second guide rail extending in the radial direction of the machine tool spindle;

the second guide rail is slidably arranged on the first guide rail, and the multi-dimensional adjusting frame is fixed on the second guide rail.

Optionally, in the structure of the objective lens machining device, the objective lens machining device further comprises a threading tool and an external turning tool fixed on the moving mechanism, wherein the threading tool and the external turning tool are respectively arranged along the radial direction of the machine tool spindle and at intervals on the multidimensional adjusting frame.

The invention further solves the defect that when the distance between the tool tip of the turning tool and the positioning surface of the parfocal thread is measured by the conventional objective lens processing device, a measuring scale is adopted, so that errors exist in manual measurement, and the parfocal distance of the processed objective lens is difficult to meet the requirement.

Therefore, the structure of the objective lens processing device further comprises a laser tool setting gauge arranged between the target and the six-axis parallel displacement table.

Optionally, the objective lens processing device structure further includes a hollow housing, and the housing is fixed to the moving mechanism;

a lighting component is arranged in the shell, a cylindrical mounting cylinder is fixed at the inner side end of the target, the mounting cylinder is fixedly connected with the multidimensional adjusting frame, and the outer side end of the mounting cylinder penetrates through an opening of the shell; the target is fixed on the end face of the outer side of the mounting cylinder.

The technical scheme of the invention has the following advantages:

1. the invention provides an objective lens processing device, comprising: a machine tool, a machine tool spindle provided on the machine tool; the six-axis parallel displacement table is fixed on the machine tool main shaft; the six-axis parallel displacement table is used for mounting the objective lens so as to drive the objective lens to do pitching motion and position transfer motion; the targets are distributed opposite to the six-axis parallel displacement table; the image acquisition assembly is used for acquiring the imaging of the target on an objective lens arranged on the six-axis parallel displacement table; and the control mechanism is electrically connected with the image acquisition assembly and the six-axis parallel displacement table and controls the six-axis parallel displacement table to move so that the six-axis parallel displacement table adjusts the position of the objective lens.

According to the objective lens processing device with the structure, the six-axis parallel displacement table is fixed on the main shaft of the machine tool, then the objective lens to be processed is installed on the six-axis parallel displacement table, and the image acquisition assembly is used for acquiring the image formed by the target passing through the objective lens.

The control mechanism controls the six-axis parallel displacement table to move so as to drive the objective lens to pitch up and down and to shift the position, the position of the objective lens relative to the machine tool spindle can be adjusted, the position of the objective lens is automatically adjusted through the six-axis parallel displacement table, the inclination of the optical axis of the objective lens relative to the machine tool spindle can be adjusted, the optical axis of the objective lens and the machine tool spindle can be adjusted to be coaxial, the optical axis of the objective lens and the axis of the machine tool spindle can be automatically and coaxially adjusted, the definition and the alignment rate of a target acquired by the image acquisition assembly through imaging on the objective lens are continuously adjusted, the optical axis of the objective lens and the axis of the machine tool spindle can be accurately and coaxially arranged, the objective lens can be accurately centered when the objective lens is subsequently processed, the defect that the centering precision of the processed objective lens is poor due to the manual adjustment of the position of the objective, and the centering can be automatically completed by combining the control of the control mechanism.

2. The objective processing device provided by the invention further comprises a laser tool setting gauge arranged between the target and the six-axis parallel displacement table. The method is characterized in that the distance from the positioning surface of the parfocal thread to be processed of the objective lens to the tool tip of the cylindrical turning tool is accurately calibrated by means of a laser tool setting gauge, the parfocal distance is accurately guaranteed by means of the movement precision of a guide rail of a numerical control machine tool, and the defects that manual measurement caused by a measuring scale has errors and the parfocal distance of the processed objective lens meets requirements is difficult to guarantee are overcome.

3. According to the objective processing device, the six-axis parallel displacement table is used as the adjusting device of the objective, so that the rigidity of the main shaft is high, the stability is high, and the processing precision of the objective parfocal thread is higher when the parfocal thread processing precision is guaranteed.

4. The objective lens processing device provided by the invention can clamp the objective lens once, and can respectively finish the centering and the parfocal of the objective lens and the processing of parfocal threads of the objective lens. Therefore, the coaxiality of the objective lens parfocal thread mechanical shaft and the objective lens optical axis is ensured, and the verticality of the positioning surface of the parfocal thread and the objective lens optical axis is also ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of an overall structure of a processing apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the image capturing assembly shown in FIG. 1, showing the position structure of the target and the turning tool;

FIG. 3 is a schematic diagram illustrating calculation of distances between a positioning surface and a turning tool and a target;

FIG. 4 is a schematic view of the position structure of the mounting shaft between the transfer member and the objective lens;

FIG. 5 is an enlarged view of the structure at A in FIG. 2;

FIG. 6 is an enlarged view of the structure at B in FIG. 2;

FIG. 7 is a schematic view showing the positional structure of the transfer member and the spindle of the machine tool;

FIG. 8 is a schematic diagram of a structure of position change between a cross and an optical axis of a camera when an objective lens is a standard objective lens and a target surface is vertically adjusted;

FIG. 9 is a schematic diagram of a structure of position change of a cross wire of a target and an optical axis of a camera when the objective lens is a processed lens and the processed lens and a spindle of a machine tool are coaxially arranged;

FIG. 10 is a schematic view of a prior art structure of a position between a lens barrel of an objective lens and a spindle of a machine tool;

description of reference numerals:

1-a machine tool; 11-a machine tool spindle;

2-six-axis parallel displacement table; 3-a target; 31-cross hair image;

4-an image acquisition component; 41-tube mirror; 42-a camera; 43-cross reticle;

5-an objective lens; 6-an adapter; 61-mounting shaft;

7-an adjusting mechanism; 71-a multi-dimensional adjusting bracket; 72-a first guide rail; 73-a second guide rail; 74. a tool arranging seat of the machine tool;

8-turning a tool; 81-external turning tool; 82-threading tool; 9-laser tool setting gauge;

10-a housing; 101-an illumination component; 102-mounting a barrel; 103-a lens barrel; 104-pivot point; 105-a machine tool spindle; 106-fixed shaft; 107-measuring scale; 108-centering control system; 109-numerical control machine control system.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

This embodiment describes an objective lens processing device, which is used for centering and parfocal an objective lens 5, and lathing a parfocal thread on the outer circumferential surface of the objective lens, so that the mechanical axis of the parfocal thread coincides with the optical axis of the objective lens, and the positioning surface of the parfocal thread is perpendicular to the optical axis of the objective lens, as shown in fig. 1-7, the processing device includes a machine tool 1, a six-axis parallel displacement table 2, a target 3, an image acquisition assembly 4, and a control mechanism, wherein the machine tool 1 is provided with a machine tool spindle 11, the six-axis parallel displacement table 2 is fixed on the machine tool spindle 11, and the objective lens 5 is placed on the six-axis parallel displacement table 2.

The image acquisition assembly 4 and the six-axis parallel displacement table 2 are respectively fixed at two ends of the machine tool spindle 11, a control mechanism is electrically connected with the image acquisition assembly 4 and the six-axis parallel displacement table 2, the control mechanism controls the six-axis parallel displacement table 2 to move, and the six-axis parallel displacement table 2 can drive the objective lens to do pitching tilting motion and radial translation motion in the moving process, so that the position of the objective lens 5 relative to the axis of the machine tool spindle 11 can be adjusted.

The six-axis parallel displacement table drives the objective lens to move, and specifically includes driving the objective lens 5 to rotate around a Z axis where an axis of a machine tool spindle is located and move along the Z axis direction, to rotate around an X axis perpendicular to the Z axis and move along the X axis, and to rotate around a Y axis perpendicular to the Z axis and move along the Y axis. That is, the six-axis parallel displacement table can drive the object lens to move with six degrees of freedom, so as to change the pitch tilt angle and the radial position of the object lens, so as to adjust the axial position of the optical axis of the object lens 5 relative to the machine tool spindle 11, so that the six-axis parallel displacement table 2 can automatically adjust the position of the object lens 5 under the control of the control mechanism, thereby realizing the effect of the coincidence of the optical axis of the object lens 5 and the machine tool spindle 11, and improving the centering precision of the object lens 5.

When the multi-dimensional multi-angle adjusting device is used specifically, the six-axis parallel displacement table 2 is used for adjusting the multi-dimensional angle of the objective lens 5, the optical axis of the objective lens 5 can be accurately coincided and adjusted with the machine tool spindle 11, automatic centering is achieved, centering accuracy and efficiency are high, the six-axis parallel displacement table 2 can be used for adjusting the inclination of the optical axis of the objective lens relative to the spindle, the two stages can be adjusted to be coaxial, and therefore centering accuracy is improved.

The control system comprises a centering control system 108 and a numerical control machine tool control system 109, wherein the centering control system 108 controls and drives the six-axis parallel displacement table to operate according to imaging information of an image acquisition assembly acquisition target passing through an objective lens, so that automatic centering of the objective lens is adjusted, centering efficiency is improved, a centering process can be completed automatically, and centering time is saved.

In this embodiment, the target 3 and the six-axis parallel displacement stage 2 are distributed relatively, the adapter 6 is further fixedly disposed on the six-axis parallel displacement stage 2, the adapter 6 has a circular mounting shaft 61, an inner hole of the objective lens is sleeved on the mounting shaft 61, a side surface of the target 3 opposite to the six-axis parallel displacement stage 2 has a target surface, a cross-hair is disposed on the target surface, the cross-hair forms a cross-hair image 31 on the objective lens 5, the image acquisition assembly 4 is configured to acquire the cross-hair image 31, and whether the optical axis of the objective lens is coaxial with the machine tool spindle 11 is determined by observing a movement condition of the center of the cross-hair image 31 acquired by the image acquisition assembly 4 and a positional relationship between the movement condition and the center of the cross-hair 43 of the image acquisition assembly 4.

Rotating the machine tool spindle, and when the center of the cross-hair image 31 acquired by the image acquisition assembly 4 makes circular motion, indicating that the optical axis of the objective lens is not coaxial with the axis of the machine tool spindle 11; the position of the objective lens 5 is automatically adjusted by the six-axis parallel displacement table 2, and the optical axis of the objective lens is coaxial with the machine tool spindle 11 only when the center of the cross-hair image 31 acquired by the image acquisition assembly 4 does not make circular motion and completely coincides with the center of the cross-hair line 43 of the image acquisition assembly 4.

Specifically, the image capturing assembly 4 includes a tube mirror 41 and a camera 42, the tube mirror 41 is coaxially and rotatably inserted into the inner cavity of the machine tool spindle 11, the optical axis of the camera 42 is coaxially arranged with the tube mirror 41, and is mounted on the tube mirror 41, and is disposed outside the machine tool spindle 11, the machine tool spindle 11 is rotatably connected with the tube mirror 41 through a conductive slip ring 53, the conductive slip ring 53 rotationally conducts electricity to the six-axis parallel displacement table 2 through a cable, a cable is also disposed between the centering control system 108 and the conductive ring 53, and transmits a control signal to the conductive ring 53 through the cable, the conductive ring 53 transmits the control signal to the six-axis parallel displacement table 2, and plays a role of controlling the six-axis parallel displacement table 2 to control the movement of the six-axis parallel displacement table 2, when the six-axis parallel displacement table 2 adjusts the position of the optical axis of the objective lens 5 relative to the axis of the machine tool spindle, the centering control system 108 can transmit the control signal to the six-axis parallel displacement table 2, and simultaneously can transmit the image information acquired by the camera to the centering control system 108 through the cable, so that the image is displayed in the centering control system 108, and the effect that the centering control system can control the six-axis displacement table in real time is realized.

In the present embodiment, the apparatus further includes an adjusting mechanism 7 provided in the machine tool 1, and the target 3 is fixed to the adjusting mechanism 7 to adjust the Y-axis displacement and the pitch angle of the target 3.

The adjusting mechanism 7 comprises a multi-dimensional adjusting frame 71 and a moving mechanism, the target 3 is mounted on the multi-dimensional adjusting frame 71, the multi-dimensional adjusting frame 71 can adjust the pitch angle and the Y-axis displacement of the target 3, the multi-dimensional adjusting frame 71 is mounted on the moving mechanism, the moving mechanism is used for driving the multi-dimensional adjusting frame 71 to slide on the Z axis and the X axis on the horizontal plane in a reciprocating mode, and the elevation and depression angle and the positions of the target on the X axis, the Y axis and the Z axis are adjusted under the matching of the multi-dimensional adjusting frame 71 and the moving mechanism.

Alternatively, the multidimensional adjusting frame 71 can adopt a four-dimensional adjusting frame or a five-dimensional adjusting frame, and can perform multidimensional angle adjustment on the target.

As for the transfer mechanism, as shown in fig. 1 and fig. 2, the moving mechanism includes a first guide rail 72 extending along the axial direction (Z axis) of the machine spindle 11 and a second guide rail 73 extending along the X axis direction, where the second guide rail 73 is slidably disposed on the first guide rail 72, the second guide rail 73 and the multidimensional adjusting frame 71 are respectively driven by corresponding driving motors, the driving motor of the second guide rail 73 is electrically connected to the nc machine control system 109, and the nc machine control system 109 can control the driving motors to control the position of the second guide rail 73 relative to the first guide rail 72, so as to adjust the position of the multidimensional adjusting frame 71 relative to the objective lens 5;

the multidimensional adjusting frame 71 is fixed on the second guide rail 73, and when the second guide rail 73 slides along the first guide rail 72, the multidimensional adjusting frame 71 can be driven to slide on the first guide rail 72, so that the position of the target 3 relative to the machine tool spindle 11 can be adjusted.

As shown in fig. 2, when the multidimensional adjustment bracket 71 is attached to the second rail 73, the multidimensional adjustment bracket 71 may be attached to the second rail 73 through a hollow housing 10, the housing 10 may be fixed to the second rail 73 of the moving mechanism, an illumination member 101 and an attachment cylinder 102 may be further provided in the housing 10, and the multidimensional adjustment bracket 71 may be provided in the housing 10.

The illumination member 101 and the multidimensional adjustment frame 71 are sequentially disposed inside the housing 10, and optionally, the mounting cylinder 102 is disposed in a cylindrical shape, an inner end of the mounting cylinder is fixedly connected to the multidimensional adjustment frame 71, an inner end of the target 3 is fixed to the mounting cylinder 102, an outer end of the mounting cylinder 102 is inserted into an opening of the housing 10, and then the target 3 is fixed to an outer end surface of the mounting cylinder 102, the multidimensional adjustment frame can adjust a pitch angle of the mounting cylinder 102 and a position in the Y-axis direction, and further, the multi-dimensional adjustment frame can adjust the pitch angle and the position in the X, Y, Z-axis direction of the target in cooperation with the first guide rail and the second guide rail.

As shown in fig. 2, a light homogenizing plate is further provided between the illumination member 101 and the target 3, and when the target is inclined with respect to the illumination member, the light from the illumination member can be uniformly dispersed by the light homogenizing plate and irradiated on the target.

Alternatively, the illumination means 101 may be an LED lamp, by which the brightness inside the housing 10 can be increased, so that the cross-hair image 31 of the target 3 is more brightened and the imaging effect is better when passing through the objective lens 5. Or else OLED lamps, or sodium lamps, etc.

In this embodiment, the device further includes turning tools fixed on the moving mechanism, and the turning tools are spaced from the multidimensional adjusting frame 71 along the X-axis direction. Specifically, as shown in fig. 2, the turning tool 8 includes a threading tool 82 and an outer turning tool 81, and the threading tool 82 and the outer turning tool 81 are mounted on the moving mechanism through the tool apron block 74.

The optical axis of the objective lens 5 to be machined is adjusted to coincide with the axis of the machine tool spindle 11, the outer circle lathe tool 81 is used for turning the outer circle surface of the parfocal thread of the objective lens 5, after the turning of the outer circle surface of the parfocal thread of the objective lens 5 is completed, the outer circle lathe tool 81 is detached from the moving mechanism or the threading lathe tool 82 is moved away, and the threading lathe tool 82 is used for threading the objective lens 5.

Wherein, in order to accurately align the focus of the objective lens 5, i.e. to process the positioning surface of the alignment focus thread, hereinafter referred to as positioning surface, a laser tool setting gauge 9 may be further arranged between the target 3 and the six-axis parallel displacement table 2, when the laser tool setting gauge 9 is used for mounting the target surface, the target surface is adjusted to be perpendicular to the axis of the machine tool spindle and the positions of the target surface and the turning tool 8 are determined, the axial distance between the target surface and the excircle and the tip of the threading tool 82 is calculated by the laser tool setting gauge 9, and further, when the target surface of the target 3 is clearly imaged on the camera, the axial distance between the positioning surface 51 of the objective lens 5 and the excircle and the tip of the threading tool 82 is calculated, so as to complete the positioning of the positioning surface 51 of the objective lens 5, the distance between the positioning surface of the alignment focus thread to be processed by the objective lens and the tip of the excircle 81 is accurately calibrated by the laser tool setting gauge, accurately ensuring the parfocal distance.

In this embodiment, the objective lens machining device performs the machining operations of centering, parfocal and parfocal screw on the objective lens:

first, centering of an objective lens to be processed:

s1: firstly, a standard objective is taken and installed on the adapter 6, the position of the six-axis parallel displacement table 2 is reset to zero, as the standard objective is centered, the optical axis of the standard objective and the axis of the spindle of the machine tool and the axis of the installation shaft on the adapter are coaxially installed, after the standard objective is installed on the adapter, the standard objective is kept still, the target 3 is moved along the Z-axis and X-axis directions, the numerical control machine control system 109 outputs a control signal to the driving motor to drive the second guide rail 73 to move on the first guide rail 72, the target 3 moves on the first guide rail 72 and the second guide rail 73 and is close to the standard objective, further the multidimensional adjusting frame 71 is started to adjust the pitch inclination angle and the radial position of the target 3, the pitch inclination angle and the radial position of the target 3 relative to the standard objective are continuously adjusted through the multidimensional adjusting frame 71, so that a clear cross silk image 31 can be presented on the imaging surface of, and the cross hair image 31 is superposed with the cross-shaped scribed line 43 on the imaging surface of the camera 42, which indicates that the adjustment of the target 3 relative to the machine tool spindle is completed, i.e. the cross hair on the target surface is perpendicular to the machine tool spindle and the center of the cross hair is collinear with the machine tool spindle.

Specifically, referring to fig. 8, firstly, observing the cross-hair image 31 on the imaging surface of the camera 42, if the cross-hair image 31 is partially clear and partially blurred, which indicates that the target surface is not perpendicular to the machine tool spindle 11, performing pitch angle adjustment on the target 3 by using a pitch and tilt adjusting knob in the multidimensional adjusting frame until the cross-hair image 31 on the imaging surface of the camera 42 is completely clear, thus completing the adjustment of the target surface perpendicular to the axis of the machine tool spindle 11, wherein the numerically-controlled machine tool control system controls the movement of the tool arranging seat and the second guide rail, so as to achieve the effects of approaching the target surface to the objective lens and adjusting the axis of the objective lens relative to the machine tool spindle;

secondly, the machine tool spindle 11 is controlled to rotate by the centering control system, the cross image 31 on the imaging surface of the camera 42 is further observed, at this time, because the standard objective lens has already finished centering, if the center of the target surface is overlapped with the axis of the machine tool spindle, the center point of the cross image 31 is overlapped with the center point of the cross scribed line 43 on the camera imaging surface, if the center of the target surface is not overlapped with the axis of the machine tool spindle 11, the multi-dimensional adjusting frame 71 is used for carrying out radial translation adjustment on the target 3 until the center of the cross image 31 is overlapped with the center of the cross scribed line 43 on the imaging surface of the camera 42, and thus the adjustment of the collinear axis of the target surface and the axis of the machine tool spindle 11 is finished.

S2: and taking down the standard objective lens, sleeving the processed objective lens on the adaptor 6, and moving the calibrated target only along the tool apron in the Z direction to be close to the objective lens until a clear cross-hair image 31 is received on the camera imaging surface. The machine tool spindle is rotated, the motion condition of the center of the cross-hair image 31 is observed and fed back to the centering control system, the centering control system controls the six-axis parallel displacement table to move according to the feedback condition, the processed objective lens is driven to do pitching tilting motion and radial translation motion until the center of the cross-hair image 31 is completely overlapped with the center of a cross-hair line on the camera imaging surface and does not do circular motion along with the center of the cross-hair line, and the adjusting effect that the optical axis of the processed objective lens is coaxial with the machine tool spindle is achieved.

Referring to fig. 9, the machine tool spindle 11 is rotated to determine whether the optical axis of the objective lens to be processed is coaxial with the axis of the machine tool spindle 11 by observing the movement of the center of the crosshair image 31 collected on the imaging surface of the camera 42.

When observing that the center of the cross-hair image 31 collected by the camera 42 does circular motion, it indicates that the optical axis of the processed objective lens is not parallel to the main shaft 11 of the machine tool, the control mechanism is required to control the six-axis parallel displacement table 2 to move to adjust the processed objective lens to do pitching or tilting motion until the center of the cross-hair image 31 does not do circular motion along the imaging surface of the camera, so as to realize the adjustment that the optical axis of the processed objective lens is parallel to the main shaft 11 of the machine tool.

Further, whether or not the center of the cross image 31 coincides with the center of the reticle on the camera image plane is observed, and if they do not coincide with each other, it is described that the optical axis of the objective lens to be processed is not parallel to but not collinear with the machine tool spindle 11. The control mechanism is required to control the six-axis parallel displacement table to move to adjust the processed objective lens to do radial translation movement until the center of the cross-hair image 31 is superposed with the center of a cross-hair on the camera imaging surface, so that the adjustment of the optical axis of the processed objective lens and the machine tool spindle 11 in a collinear manner is completed, and the centering of the processed objective lens is completed.

Second, the processing of the parfocal and parfocal screw of the processed objective lens

When the tool setting and the target 3 imaging clearly are calculated, the positioning surface 51 of the parfocal thread of the processed objective lens is far away from the tool tip of the turning tool 8 (comprising an excircle turning tool and a threading tool) and the axial distance d₂The positioning of the positioning surface 51 of the parfocal thread of the objective lens to be machined, i.e. the parfocal of the objective lens to be machined, is completed, see fig. 3, calculating d₂The method comprises the following steps:

s3: at S2, after the centering of the objective lens to be processed is adjusted, the tool gang holder 74 is moved along the Z axis and the X axis, and the housing 10 is moved on the moving mechanism along the Z axis and the X axis in a direction close to the machine tool spindle 11 until the target surface of the target 3 passes through the laser tool setting gauge 9, and at this time, the moving amount Δ Z1 of the target 3 is recorded;

s4: the housing 10 is moved in the X-axis direction by DeltaX₁The distance of the distance (delta Z) is set to give a space for the turning tool 8, and then the turning tool 8 is moved along the Z axis until the tool tip of the turning tool 8 passes through the laser tool setting gauge 9, and the movement quantity delta Z of the tool tip of the turning tool 8 is recorded₂Therefore, the distance d from the target surface to the tool nose of the turning tool 8 can be obtained₁＝ΔZ₂。

S5: the target 3 is moved upwards in the positive direction of the X-axis and again by DeltaX₁Is returned to the main optical path and then moves by Delta Z along the Z-axis direction₃＝ΔZ₁+ΔZ₂The distance of (3) is the focal length d, i.e. the distance from the positioning surface 51 of the objective lens to be processed to the target surface when the target 3 is retreated to the position when the target 3 is clearly imaged₀The axial distance d from the positioning surface 51 of the objective lens to the tip of the turning tool 8₂＝d₀+d₁＝d₀+ΔZ₂＝d₀+ΔZ₃-ΔZ₁，d₀The distance that the cutting edge of the turning tool 8 needs to move to the positioning surface 51 of the objective lens to be machined is calculated by using the known numerical value of (2), and the positioning of the positioning surface 51 of the objective lens to be machined is completed.

S6: firstly, an excircle turning tool 81 is used for turning the excircle and the positioning surface of the parfocal thread of the processed objective lens, and then a threading tool 82 is used for turning the external thread of the processed objective lens, so that the processing of the parfocal and the parfocal thread of the processed objective lens 5 is completed.

The specific operation is as follows: moving the target 3 away from the X-axis direction of the machine tool spindle 11, making room for the external turning tool 81, then starting to rotate the machine tool spindle 11, and feeding the external turning tool 81 in the direction close to the objective 5 to be processed on the machine tool spindle 11 by d₂The external thread of the objective to be processed is turned by the threading tool 82 after the external thread and the positioning surface of the parfocal thread of the objective 5 are turned; the numerical control system controls the movement of the excircle turning tool 81 and the rotation of the machine tool spindle to turn the major diameter and the positioning surface of the objective lens parfocal thread, at the moment, the mechanical axis of the major diameter of the objective lens parfocal thread is coaxial with the optical axis of the objective lens, so that the centering of the objective lens is completed, and the distance from the positioning surface of the objective lens parfocal thread to the focal plane is the required parfocal distance, so that the parfocal of the objective lens is completed; finally, the screw lathe tool 82 is replaced, and the parfocal screw thread for mounting the objective lens is turned, so that the parfocal screw thread of the processed objective lens is processed.

That is, in the best embodiment, the objective lens processing device includes a machine tool, a machine tool body arranged on the machine tool, an X-axis guide rail, a Z-axis guide rail, a machine tool spindle capable of rotating around a Z-axis, a machine tool gang tool seat 74 capable of moving along the X-axis and the Z-axis, an external lathe tool and a threading tool arranged on the machine tool gang tool seat 74, a laser tool setting gauge, and a numerical control system; the six-axis parallel displacement table is fixed on the machine tool main shaft; the objective lens to be processed is fixed on the six-axis parallel displacement table through the adapter; the target and lighting assembly is fixed on the lathe tool arranging seat 74 and is distributed opposite to the external turning tool and the threading tool; the image acquisition assembly is used for acquiring an image of the target passing through the objective lens; and the centering control system is electrically connected with the image acquisition assembly and the six-axis parallel displacement table 2. The centering control system controls the six-axis parallel displacement table 2 to move, so that the position of the objective lens can be automatically adjusted according to the feedback of the target image acquired by the image acquisition assembly, and finally the optical axis of the objective lens is coaxial with the axis of the machine tool spindle. And then, keeping the six-axis parallel displacement table still, calibrating the Z-axis positions of a target surface and the tool point of the external lathe tool when the target is clearly imaged by using the laser tool setting instrument, feeding the positions back to a numerical control system, calculating the distance from the positioning surface of the parfocal thread to be processed by the objective lens to the tool point of the external lathe tool by the numerical control system according to a corresponding algorithm, finally controlling the movement of the external lathe tool and the rotation of a machine tool main shaft by the numerical control system, turning the external circle of an objective lens barrel, and turning the large diameter and the positioning surface of the parfocal thread of the objective lens, wherein the mechanical axis of the large diameter of the parfocal thread of the objective lens is coaxial with the optical axis of the objective lens, so that the centering of the objective lens is completed, and the distance from the positioning surface of the parfocal thread of the objective lens. And finally, changing the screw lathe tool into a threading tool, and turning the parfocal screw for mounting the objective lens.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.