阅读说明：本技术 手机镜头模组缺陷检测装置及检测方法 (Device and method for detecting defects of mobile phone lens module ) 是由 殳治杰 姚碧锋 于 2021-09-14 设计创作，主要内容包括：本发明涉及自动化检测技术领域,公开了一种手机镜头模组缺陷检测装置,包括吸嘴单元、光源装置和检测模组,所述光源装置对吸嘴单元发射光线,所述吸嘴单元被光线照射后会发光,并对吸嘴单元上吸附的手机镜头模组进行照射,所述检测模组对吸嘴单元上吸附的手机镜头模组进行缺陷检测。所述吸嘴单元包括吸嘴体和吸嘴体下方的吸嘴,所述吸嘴体为透明材质的锥形结构,所述吸嘴位于锥形结构底面的中央位置,所述锥形结构的侧面设计有多个呈一定角度的全反射微棱镜,所述全反射微棱镜呈阵列排布。所述锥形结构的底面设计有多个漫反射微透镜,所述漫反射微透镜呈阵列排布。本发明还公开了对应的检测方法。本发明对手机镜头模组一次成像即可检测多种缺陷项目,提高检测效率,节省检测时间。(The invention relates to the technical field of automatic detection, and discloses a defect detection device for a mobile phone lens module, which comprises a suction nozzle unit, a light source device and a detection module, wherein the light source device emits light to the suction nozzle unit, the suction nozzle unit can emit light after being irradiated by the light and irradiates the mobile phone lens module adsorbed on the suction nozzle unit, and the detection module detects defects of the mobile phone lens module adsorbed on the suction nozzle unit. The suction nozzle unit comprises a suction nozzle body and a suction nozzle below the suction nozzle body, the suction nozzle body is of a conical structure made of transparent materials, the suction nozzle is located in the center of the bottom surface of the conical structure, a plurality of total reflection micro prisms at a certain angle are designed on the side surface of the conical structure, and the total reflection micro prisms are arranged in an array. The bottom surface design of toper structure has a plurality of diffuse reflection microlens, diffuse reflection microlens is array arrangement. The invention also discloses a corresponding detection method. The invention can detect various defect items by imaging the mobile phone lens module at one time, thereby improving the detection efficiency and saving the detection time.)

1. The utility model provides a cell-phone camera lens module defect detecting device which characterized in that: the mobile phone lens detection device comprises a suction nozzle unit, a light source device and a detection module, wherein the light source device emits light to the suction nozzle unit and irradiates a mobile phone lens module adsorbed on the suction nozzle unit, the detection module detects defects of the mobile phone lens module adsorbed on the suction nozzle unit, the suction nozzle unit comprises a suction nozzle body and a suction nozzle below the suction nozzle body, the suction nozzle body is of a conical structure made of transparent materials, the suction nozzle is positioned in the central position of the bottom surface of the conical structure, a plurality of total reflection micro prisms with certain angles are designed on the side surface of the conical structure, the total reflection micro prisms are arranged in an array mode, the light emitted by the light source device is refracted by the same side surface of the suction nozzle body and then reflected by the total reflection micro prisms on the opposite side surface and vertically irradiates the bottom surface of the conical structure, a plurality of diffuse reflection micro lenses are designed on the bottom surface of the conical structure, and the diffuse reflection micro lenses are arranged in an array mode, the light rays vertically emitted to the bottom surface of the conical structure are refracted by the diffuse reflection micro lens to form uniformly diffused light rays which irradiate the mobile phone lens module adsorbed on the suction nozzle.

2. The device for detecting defects of a mobile phone lens module according to claim 1, wherein: the suction nozzle unit further comprises a through hole arranged in the middle of the inner portion of the suction nozzle body, the lower end of the through hole is connected to the suction nozzle, the upper end of the through hole is connected to the air suction device through an air pipe, and the suction nozzle generates negative pressure to adsorb the mobile phone lens module.

3. The device for detecting defects of a mobile phone lens module according to claim 2, wherein: the suction nozzle unit is mounted on a rotating mechanism which is mounted on a moving mechanism.

4. The device for detecting defects of a mobile phone lens module according to claim 3, wherein: the light source device comprises a collimation LED light source, the collimation LED light source is arranged on a light source support, and collimation light rays with a certain angle are irradiated to the suction nozzle body by the collimation LED light source.

5. The device for detecting defects of a mobile phone lens module according to claim 4, wherein: the two collimation LED light sources are symmetrically arranged on two sides of the suction nozzle body.

6. The device for detecting defects of a mobile phone lens module according to any one of claims 1 to 5, wherein: the detection module comprises an annular LED light source and a reflector which are arranged below the suction nozzle body, a coaxial LED light source is arranged on one side of the reflector, and a telecentric lens and a CMOS image acquisition camera are arranged on a light path behind the coaxial LED light source.

7. The device for detecting defects of a mobile phone lens module according to claim 6, wherein: and the annular LED light source and the coaxial LED light source are arranged.

8. The device for detecting defects of a mobile phone lens module according to claim 6, wherein: and a reflector is arranged on a light path below the annular LED light source, and the reflector and the light path form an angle of 45 degrees.

9. A defect detection method for a mobile phone lens module, which applies the defect detection device for a mobile phone lens module according to any one of claims 1 to 8, wherein: the method comprises the following steps:

(1) the suction nozzle unit sucks the mobile phone lens module through the suction head negative pressure effect;

(2) the suction nozzle unit moves to the position of the light source device, and the LED light source emits light to the suction nozzle body in a collimation mode;

(3) after being refracted by the suction nozzle body, the light rays are reflected by the total reflection micro prism and then refracted by the diffuse reflection micro lens to emit diffused light, so that the mobile phone lens module is uniformly irradiated;

(4) the annular LED light source emits light to the mobile phone lens module;

(5) the coaxial LED light source emits light to the reflector placed at 45 degrees, and the light is reflected and vertically upwards irradiates the mobile phone lens module;

(6) and after returning along the light path, the light irradiated on the mobile phone lens module is received by the telecentric lens and focused on the CMOS camera sensor for imaging.

10. The method for detecting defects of a mobile phone lens module according to claim 9, wherein: and (5) synchronously performing the steps (2), (4) and (5).

Technical Field

The invention relates to the technical field of automatic detection, in particular to a device and a method for detecting defects of a mobile phone lens module.

Background

The defect detection of the mobile phone lens module adopts manual or camera detection in the prior art, and the module is placed under illumination for local and overall detection.

Due to the condition of light, comprehensive detection cannot be carried out at one time, and the detection effect is not satisfactory.

Disclosure of Invention

The present invention is directed to solve the above problems, and an object of the present invention is to provide a device and a method for detecting defects of a lens module of a mobile phone, which can detect various defect items by imaging the lens module of the mobile phone once, thereby improving the detection efficiency and saving the detection time.

The technical scheme adopted by the invention is as follows:

a defect detection device for a mobile phone lens module is characterized by comprising a suction nozzle unit, a light source device and a detection module, wherein the light source device emits light to the suction nozzle unit to irradiate the mobile phone lens module adsorbed on the suction nozzle unit, the detection module detects defects of the mobile phone lens module adsorbed on the suction nozzle unit, the suction nozzle unit comprises a suction nozzle body and a suction nozzle below the suction nozzle body, the suction nozzle body is of a conical structure made of transparent materials, the suction nozzle is positioned in the central position of the bottom surface of the conical structure, a plurality of total reflection micro prisms with certain angles are designed on the side surface of the conical structure, the total reflection micro prisms are arranged in an array mode, the light emitted by the light source device is refracted by the side surface of the conical structure on the same side of the suction nozzle body and then reflected by the total reflection micro prisms on the side surface of the opposite conical structure to be perpendicular to the bottom surface of the conical structure, the bottom surface of the conical structure is provided with a plurality of diffuse reflection micro lenses which are arranged in an array mode, light rays vertically emitted to the bottom surface of the conical structure form diffused light rays after passing through the diffuse reflection micro lenses, and the diffused light rays uniformly irradiate the mobile phone lens module.

Further, the suction nozzle unit further comprises a through hole arranged in the middle of the inner portion of the suction nozzle body, the lower end of the through hole is connected to the suction nozzle, the upper end of the through hole is connected to the air suction device through an air pipe, and the suction nozzle generates negative pressure to adsorb the mobile phone lens module.

Further, the suction nozzle unit is mounted on a rotating mechanism, which is mounted on a moving mechanism.

Further, the light source device comprises a collimation LED light source, the collimation LED light source is arranged on the light source support, and collimation light rays with a certain angle are irradiated to the suction nozzle body by the collimation LED light source.

Furthermore, the number of the collimation LED light sources is two, and the two collimation LED light sources are symmetrically arranged on two sides of the suction nozzle body.

Further, the detection module comprises an annular LED light source and a reflector which are arranged below the suction nozzle body, a coaxial LED light source is arranged on one side of the reflector, and a telecentric lens and a CMOS image acquisition camera are arranged on a light path behind the coaxial LED light source.

Further, the annular LED light source and the suction nozzle are concentrically arranged.

Further, a reflector is arranged below the light path of the annular LED light source, and the reflector and the light path form an angle of 45 degrees.

A defect detection method for a mobile phone lens module is characterized by comprising the following steps:

(1) the suction nozzle unit sucks the mobile phone lens module through the suction head negative pressure effect;

(2) the suction nozzle unit moves to the position of the light source device, and the LED light source emits light to the suction nozzle body in a collimation mode;

(3) after being refracted by the suction nozzle body, the light rays are reflected by the total reflection micro prism and then transmitted by the diffuse reflection micro lens, and then the light rays are diffused by the mobile phone lens module;

(4) the annular LED light source and the suction nozzle are arranged concentrically, and light rays are emitted to the mobile phone lens module from the lower part;

(5) the coaxial LED light source emits light to the 45-degree reflector, and the light is reflected and vertically upwards irradiates the mobile phone lens module;

(6) and after returning along the light path, the light irradiated on the mobile phone lens module is received by the telecentric lens and focused on the CMOS camera sensor for imaging.

Further, the steps (2), (4) and (5) are performed synchronously.

The invention has the beneficial effects that:

(1) the suction nozzle head uniformly emits light through reflection and scattering of the light path;

(2) the visual detection device can carry out multiple detections on the mobile phone lens module, so that the mobile phone lens module is prevented from being adsorbed to different detection positions for detection, detection stations and detection time are reduced, and detection efficiency is improved;

(3) the LED light source is placed outside the suction nozzle head, so that the volume of the suction nozzle head is reduced, the suction nozzle head is convenient to replace, and the replacement cost is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a detecting device of the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is a schematic diagram of the optical path of the microstructure on the nozzle body;

FIG. 4 is a schematic diagram of the optical path simulation of the present invention;

fig. 5 is a comparison diagram of the backlight real-time shooting test of the mobile phone lens module.

The reference numbers in the drawings are respectively:

1. a suction nozzle unit; a light source device;

3. a detection module; 4, a suction nozzle body;

5. a suction nozzle; 6, rotating the shaft;

7. a gas pipe joint; an X-axis slide plate;

9. a total reflection microprism; a diffusely reflective microlens;

11. collimating the LED light source; an annular LED light source;

13. a half-reflecting and half-transmitting mirror; a mirror;

15. a coaxial LED light source; a telecentric lens;

a CMOS image capture camera; a light source holder.

Detailed Description

The following describes in detail a specific embodiment of the device and method for detecting defects of a mobile phone lens module according to the present invention with reference to the accompanying drawings.

Referring to fig. 1 and 2, the defect detecting device for the mobile phone lens module mainly comprises three parts, namely a suction nozzle unit 1, a light source device 2 and a detecting module 3, wherein the light source device 2 emits light to the suction nozzle unit 1 to irradiate the mobile phone lens module adsorbed on the suction nozzle unit 1, and the detecting module 3 detects defects of the mobile phone lens module adsorbed on the suction nozzle unit 1.

The suction nozzle unit 1 comprises a suction nozzle body 4 and a suction nozzle 5 below the suction nozzle body 4, the suction nozzle body 4 is of a conical structure made of transparent materials, the suction nozzle 5 is located in the center of the bottom surface of the conical structure, and the suction nozzle body 4 is made of organic glass materials. The suction nozzle body 4 is connected with a rotating shaft 6, the center of the rotating shaft 6 is of a hollow structure, a through hole is formed in the middle of the suction nozzle body 4, the rotating shaft 6 is connected with an air pipe connector 7 and is in concentric fit with the through hole in the center of the suction nozzle body 4, and a suction nozzle 5 is installed at the lower end of the through hole in the center of the suction nozzle body 4. The air pipe joint 7 is communicated with the hollow structure at the center of the rotating shaft 6 from the side of the rotating shaft 6 and is connected with an air suction device (not shown in the figure) at the other end through an air pipe. When the suction device sucks air, the suction nozzle 5 generates suction force to suck the mobile phone lens module.

The rotating shaft 6 is nested in an X-axis sliding plate 8. The X-axis slide 8 is connected to an X-axis moving mechanism (not shown). The X-axis moving mechanism can drive the X-axis sliding plate 8 to move along the X axis and simultaneously drive the rotating shaft 6 embedded in the X-axis sliding plate 8 and the suction nozzle body 4 connected with the rotating shaft 6 to move along the X axis.

Referring to fig. 3, the suction nozzle body 4 is a conical curved light structure with a designed taper of 0.094, a plurality of total reflection micro prisms 9 with a certain angle are designed on the side surface of the conical curved light structure, the total reflection micro prisms 9 are arranged in an array, and light emitted by the light source device 2 is refracted by the side surface of the suction nozzle body 4 on the same side, reflected by the total reflection micro prisms 9 on the side surface on the opposite side, and then vertically emitted to the bottom surface of the conical structure.

The total reflection microprisms 9 are composed of a plurality of microprisms which are uniformly arranged at certain intervals, have the length and the width of 0.0877mm, the height of 0.009mm and the angle of 45 degrees. The light irradiated to the total reflection microprisms 9 is totally reflected due to the shape structure of the total reflection microprisms 9, and cannot be emitted from the inside of the suction nozzle body 4, and the direction of the light is changed again in the inside of the suction nozzle body 4. The light changing direction in the suction nozzle body 4 vertically irradiates the bottom surface of the conical structure of the suction nozzle body 4 downwards.

The bottom surface of the conical structure of the suction nozzle body 4 is provided with a plurality of diffuse reflection micro lenses 10, the diffuse reflection micro lenses 10 are arranged in an array, and light rays vertically emitted to the bottom surface of the conical structure form diffused light rays after passing through the diffuse reflection micro lenses 10 and are uniformly irradiated to the mobile phone lens module.

The diffuse reflection micro-lens 10 is composed of a plurality of spherical micro-lenses which are uniformly arranged at a certain interval and are convex inwards, wherein the radius of each spherical micro-lens is 0.505mm, and the spherical height of each spherical micro-lens is 0.0409 mm. The light irradiated to the structure of the diffuse reflection micro lens 10 is refracted due to the appearance structure of the diffuse reflection micro lens 10 and is irradiated from the inside of the suction nozzle body 4, and the irradiated light is not collimated any more, but is irradiated to diffused light in different directions.

With continued reference to fig. 1 and 2, the light source of the light source device 2 includes a collimated LED light source 11, the collimated LED light source 11 is disposed on the light source support 18, and the collimated LED light source 11 irradiates a certain angle of collimated light to the suction nozzle body 4. The two collimation LED light sources 11 are symmetrically arranged at two sides of the suction nozzle body 4.

The collimation LED light sources 11 are symmetrically arranged at the fixed positions at the two sides of the detection position on the light source support 18 at an inclination angle of 30 degrees. The nozzle body 4 is moved to the middle of the two collimation LED light sources 11, and at the moment, the collimation LED light sources 11 work to irradiate collimation light to the nozzle body 4. The collimated light emitted by the collimated LED light source 11 irradiates the conical curved light structure on the suction nozzle body 4, and the light at the conical curved light structure 11 is refracted to change the direction and enters the suction nozzle body 4.

The diffused light irradiated from the suction nozzle 4 partially hits the lens module of the mobile phone attached to the suction nozzle 4, and partially irradiates the detection module 3 downward. Because the mobile phone lens module shields part of the diffused light, the image partially collected by the visual detection module 3 presents a high-contrast image of the mobile phone lens module, and the appearance of the mobile phone lens module and the outline of the central through hole are highlighted.

The detection module 3 comprises an annular LED light source 12 arranged below the suction nozzle body 4 and a coaxial LED light source 15 on a test light path, a reflector 14 is arranged below the light path of the annular LED light source 12, and the reflector 14 and the light path form an angle of 45 degrees. A telecentric lens 16 and a CMOS image capture camera 17 are disposed on the optical path behind the coaxial LED light source 15.

When the suction nozzle body 4 is moved to the middle of the collimation LED light source 11 and the collimation LED light source 11, the collimation LED light source 11 and the collimation LED light source 11 work, and at the same time when the collimation light is irradiated to the suction nozzle body 4, the annular LED light source 12 and the coaxial LED light source 15 which are arranged below the suction nozzle body 4 also work simultaneously.

The working states of the annular LED light source 12 and the coaxial LED light source 15 depend on defect detection items to be detected by the mobile phone lens module. Aiming at different defect detection items, the annular LED light source 12 or the coaxial LED light source 15 can be independently operated, or the annular LED light source 12 and the coaxial LED light source 15 can be simultaneously operated.

The annular LED light source 12 is arranged on the light source support 18, and when the suction nozzle body 4 moves to the detection position, the suction nozzle body 4 and the annular LED light source 12 are in a concentric position relation. LED lamp beads on the annular LED light source 12 are arranged in an annular shape of 45 degrees and are enclosed to form an annular shape to irradiate light to the mobile phone lens module. The light rays irradiated in the annular shape irradiate on the mobile phone lens module, so that the specific defect characteristics can be illuminated, and a high-contrast image is presented.

The coaxial LED light source 15 is arranged on the left side of the reflector 14, and the reflector 14 is arranged at an angle of 45 degrees right below the annular LED light source 12. The inner LED lamp bead of the coaxial LED light source 15 is fixed on the upper top surface of the light source outer cover, and the LED lamp bead irradiates light downwards. And the 50%/50% semi-reflecting and semi-transmitting lens 13 is positioned below the LED lamp beads and fixed on the light source housing in an angle of 45 degrees. The LED lamp beads irradiate downward light rays to the surface of the semi-reflecting and semi-transmitting lens 13 to be reflected by 45 degrees, and the coaxial LED light source 15 is horizontally irradiated. The light horizontally radiated from the coaxial LED light source 15 is radiated onto the surface of the reflector 14. The reflector 14 placed at 45 degrees enables horizontal light rays to be reflected at 45 degrees, and the light rays upwards and vertically irradiate towards the mobile phone lens module. The light irradiates on the mobile phone lens module, so that the specific defect characteristics can be illuminated, and a high-contrast image is presented. Referring to fig. 5, the presence or absence of the backlight of the nozzle body 4 has a great influence on the detection result.

The suction nozzle body 4 moves to the detection position, and the visual detection module 3 starts to work at the same time when the LED light source part starts to work. Telecentric lens 16 is horizontally positioned to the left of the coaxial LED light source 15. When the suction nozzle body 4 moves to the detection position, the reflector 14 placed at 45 degrees reflects the image of the mobile phone lens module to the coaxial LED light source 15 along the light path. The half-reflecting and half-transmitting mirror 13 inside the coaxial LED light source 15 can transmit 50% of light and reflect 50% of light. Therefore, the image of the mobile phone lens module reflected by the reflector 14 is transmitted through the half-reflecting half-transmitting mirror 13 to continue to irradiate towards the telecentric lens 16.

The telecentric lens 16 receives the image of the mobile phone lens module and focuses and projects the image on the CMOS image acquisition black-and-white camera 17.

The CMOS image capturing monochrome camera 17 transmits the captured image data to an image processing computer (not shown) for data processing, and calculates whether the mobile phone lens module has a defect.

Referring to fig. 4, the above process can be summarized as the following steps:

(1) the suction nozzle unit 1 sucks the mobile phone lens module through the suction head negative pressure effect;

(2) the suction nozzle unit 1 moves to the position of the light source device 2, and the LED light source 11 is collimated to emit light to the suction nozzle body 4;

(3) after being refracted by the suction nozzle body 4, the light is reflected by the total reflection micro prism 9 and then is transmitted by the diffuse reflection micro lens 10, and then the mobile phone lens module is uniformly diffused;

(4) the annular LED light source 12 emits light to the mobile phone lens module;

(5) the coaxial LED light source 15 emits light to the reflector 14, and the light is reflected and then irradiates the mobile phone lens module;

(6) the light irradiated on the mobile phone lens module returns along the light path, is received by the telecentric lens 16 and is focused on the CMOS image acquisition camera 17 for imaging.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.