阅读说明：本技术 笛卡尔定位装置和具有所述笛卡尔定位装置的激光加工头 (Cartesian positioning device and laser machining head with the same ) 是由 P·舒伯特 于 2018-04-05 设计创作，主要内容包括：本发明涉及一种用于定位光具的笛卡尔定位装置,包括：用于保持光具的光具座(10)；用于所述光具座(10)沿y方向的线性运动的y调节元件(30),y调节元件(30)在端部具有y滑块(50)；用于所述光具座(10)沿x方向的线性运动的x调节元件(40),x调节元件(40)在端部上具有x滑块(60)；其中,所述x调节元件(40)和所述y调节元件(30)布置在载体元件(20)上并且能够沿着y方向调节。此外涉及一种用于借助激光束加工工件的激光加工头,其包括用于定位光具的这种笛卡尔定位装置,其中,所述光具布置在所述激光加工头的光路中。(The invention relates to a Cartesian positioning device for positioning a light fixture, comprising: an optical bench (10) for holding an optical tool; a y-adjustment element (30) for linear movement of the optical bench (10) in the y-direction, the y-adjustment element (30) having a y-slider (50) at an end; an x-adjustment element (40) for linear movement of the optical bench (10) in the x-direction, the x-adjustment element (40) having an x-slider (60) on an end; wherein the x-adjustment element (40) and the y-adjustment element (30) are arranged on a carrier element (20) and are adjustable in the y-direction. Furthermore, a laser processing head for processing a workpiece by means of a laser beam is specified, comprising such a cartesian positioning device for positioning an optical fixture, wherein the optical fixture is arranged in the beam path of the laser processing head.)

1. A cartesian positioning device for positioning a light fixture, comprising:

An optical bench (10, 110) for holding the optical tool;

A y-adjustment element (30, 130) for linear movement of the optical bench (10, 110) in the y-direction;

An x-adjustment element (40, 140) for linear movement of the optical bench (10, 110) in the x-direction

Wherein the x-adjustment element (40, 140) and the y-adjustment element (30, 130) are arranged on a carrier element (20, 120) and are adjustable along the y-direction.

2. Cartesian positioning device according to claim 1, wherein the adjustment value of the y-adjustment element (30, 130) or the x-adjustment element (40, 140) corresponds to a determined value of the linear movement in the y-direction or in the x-direction, respectively.

3. Cartesian positioning device according to claim 1 or 2, wherein the y-adjustment element (30, 130) and the x-adjustment element (40, 140) are arranged adjacent to each other on the carrier element (20, 120).

4. Cartesian positioning device according to any of the preceding claims, wherein the y-adjustment element (30, 130) is movably connected with the optical bench (10, 110) in the x-direction by means of a linear guiding unit (15, 115).

5. Cartesian positioning device according to claim 4, wherein the linear guide unit (15, 115) connects the y-adjustment element (30, 130) with the optical bench (10, 110) unchanged in terms of tensile or compressive load.

6. Cartesian positioning device according to any of the preceding claims, wherein the y adjusting element (30, 130) has a y slider (15, 150) at the end connecting the y adjusting element (30, 130) with the optical bench (10, 110), and the x adjusting element (40, 140) has an x slider (60, 160) at the end connecting the x adjusting element (40, 140) with the optical bench (10, 110).

7. Cartesian positioning device according to claim 6, wherein the x-slide (60, 160) and/or the y-slide (15, 150) is guided along at least one slide guiding element (23, 123).

8. Cartesian positioning device according to claim 6 or 7, wherein a transmission element (170) is arranged between the x-slider (130) and the optical bench (110), which transmission element is movably connected with the carrier element (120) in the x-direction.

9. The cartesian positioning device according to claim 8, wherein the transfer element (170) is movably connected with the optical bench (110) by a first guiding unit (180) and with the x-slider (130) by a second guiding unit (190).

10. Cartesian positioning device according to claim 9, wherein the first guiding unit (180) is arranged for guiding the optical bench (110) in a y-direction, wherein the second guiding unit (190) is arranged for converting an adjusting movement of the x-adjusting element (140) in the y-direction into a movement of the transfer element (70) in a direction forming an angle of less than 90 ° with the y-direction.

11. Cartesian positioning device according to one of the preceding claims 1 to 5, wherein the x-adjustment element (40) is movably connected with the optical bench (10) by a rod element (70), wherein the rod element (70) is connected with the carrier element (20) in a manner pivotable in an x-y plane and is L-shaped.

12. Cartesian positioning device according to claim 11, wherein the rod element (70) is movably connected with the optical bench (10) by a first guide unit (80) and with the x-adjustment element (30) by a second guide unit (90), wherein the first guide unit (80) comprises a first guide pin (81) and a first guide (82) for guiding the optical bench (10) in the y-direction, wherein the second guide unit (90) comprises a second guide pin (91) and a second guide (92) for transmitting the adjustment movement of the x-adjustment element (40) onto the rod element (70).

13. cartesian positioning device according to claim 12, wherein at least a part of the second guiding unit (91, 92) is arranged on a fixing projection (11) extending in y-direction from the optical bench (10).

14. Cartesian positioning device according to any of the preceding claims, wherein at least one spring element (18, 118) is connected with the optical bench (10, 110) and with the carrier element (20, 120).

15. A laser processing head for processing a workpiece by means of a laser beam, comprising:

Cartesian positioning device for positioning a light fixture according to any one of the preceding claims;

wherein the optics are arranged in an optical path of the laser processing head.

Technical Field

The invention relates to a cartesian positioning device for positioning a light fixture and to a laser processing head for processing a workpiece by means of a laser beam, comprising such a cartesian positioning device.

background

In many optical applications, it is necessary to adjust a light fixture (e.g. a lens or a beam shaping light fixture) independently of each other at least in two directions. In particular, in the case of material processing by means of a laser beam (for example laser cutting or laser welding), optical elements arranged in the laser processing head must be adjusted independently of one another in two directions perpendicular to the optical axis of the laser processing head in order to adjust the laser beam through the fine nozzle opening of the laser processing head. The following problems exist in conventional positioning devices for positioning lightheads: the optics cannot be moved precisely linearly or on mutually perpendicular axes. Thus, precise adjustment is difficult and may compromise the repeatability of the desired position.

Furthermore, the following problems occur precisely in the field of laser processing in the optical tool application: for example, in laser processing heads only a small amount of space is provided for the positioning device for positioning the optics. The accessibility for the operator is strongly limited in space, so that operating elements for positioning the light fixture along two cartesian coordinate axes, which are conventionally arranged on different sides, are difficult to achieve.

In the prior art, it is not possible to correspond the exact value of the respective movement of the light fixture along a specific axis to the adjustment of the adjustment element.

JP 2004-361862A shows a condenser system for a laser machining device, in which the lens can be moved in two dimensions perpendicular to the optical axis. For this purpose, the two sets of micrometers and springs are arranged orthogonally to each other.

Disclosure of Invention

The object of the present invention is therefore to provide a cartesian positioning device for positioning a lighthead and a laser processing head having such a cartesian positioning device, wherein positioning of the lighthead in two directions independently of one another can be achieved in a compact and simple structural manner and with improved operating comfort.

This object is achieved according to the invention by a cartesian positioning device for positioning a light fixture according to claim 1 and a laser processing head for processing a workpiece with a laser beam according to claim 15 having such a cartesian positioning device. Advantageous embodiments and embodiments of the invention are specified in the dependent claims.

According to the invention, a cartesian positioning device for positioning a light fixture comprises: a first or y-adjustment element for linear movement of the optical bench along a first cartesian coordinate axis, i.e. in the y-direction; and a second adjustment element or x-adjustment element for linear movement of the optical bench along a second cartesian coordinate axis, i.e. in the x-direction, wherein both the first adjustment element and the second adjustment element are adjustable along the first cartesian coordinate axis, i.e. in the y-direction. The first and second cartesian axes, i.e. the y-direction and the x-direction, are naturally perpendicular to each other. In other words, the x-adjustment element and the y-adjustment element can be adjusted parallel to each other. The adjusting element can be configured, for example, as a threaded spindle. This enables independent positioning along two cartesian coordinate axes. The cartesian axes, i.e. the x-axis and the y-axis, represent the coordinate axes of a cartesian coordinate system, the third coordinate axis of which is the z-axis.

Preferably, the two adjusting elements are fastened adjacent to a carrier element, on which the optical bench is fastened. This enables a clear view of the operation and simplified contact.

In a preferred embodiment, at least one of the two adjusting elements is calibrated. In other words, the determined adjustment value of one of the adjustment elements corresponds to the determined value of the linear movement along the respective cartesian coordinate axis. For this purpose, the y-adjustment element and/or the x-adjustment element each comprise a micrometer screw. Thereby, the positioning of the light fixture is repeatable and the accurate positioning of the light fixture in the optical system is simplified.

The end of the y-adjustment element can be designed as a y-slide. The end of the x adjustment element can also be configured as an x slider. The y-slider can movably connect the y-adjustment element with the optical bench. The x-slider can movably connect the x-adjustment element with the optical bench. The x-slider and/or the y-slider can be guided along at least one slider guide element.

The y-adjustment element or the y-slider can be coupled to the optical bench in a movable manner in the x-direction by means of a linear guide unit. The y-adjustment element or the y-slide and the optical bench can be movably connected to each other by a rail system or a rail system. In this case, the linear guide unit preferably has a first component arranged on a selected one of the y adjustment element (or y slider) and the optical bench and a second component arranged on a selected other of the y adjustment element (or y slider) and the optical bench. The first part of the linear guide unit has an undercut in which a correspondingly configured projection of the second part of the linear guide unit is guided. One embodiment for the linear guide unit is a dovetail guide. Preferably, the connection of the y-adjustment element or the y-slider to the optical bench is constant in tension and/or in compression. In this way, for example, a precise adjustment of the desired position can be achieved by means of a tensile or compressive force without being impaired by play in the connection.

The transfer element can be arranged between the x-slider and the optical bench. The transmission element can be connected to the carrier element or mounted in the carrier element in a manner movable in the x direction. The transmission element can be movably connected with the optical bench through the first guide unit. The first guiding unit is arranged for guiding the optical bench in the y-direction. The first guide unit comprises, for example, a linear guide unit, for example, a dovetail guide. The first guide unit can comprise a first guide portion, for example an elongated hole, extending in the y-direction and a first guide pin guided in the first guide portion. The first guide portion can be configured in a selected one of the transmission element and the optical bench, and the first guide pin can be configured in the other selected one of the transmission element and the optical bench. The transfer element is movably connected to the x-slide via a second guide unit. The second guide unit can be provided for converting an adjusting movement of the x-adjusting element in the y-direction into an adjusting movement of the transmission element in a predetermined direction, which forms an angle of less than 90 °, preferably of approximately 45 °, with the y-direction. The second guide unit can include a second guide portion (e.g., an elongated hole) extending in the predetermined direction and a second guide pin guided in the second guide portion. The second guide portion can be configured in one selected from the transmission element and the x adjustment element (or x slider), and the second guide pin can be configured in the other selected from the transmission element and the x adjustment element (or x slider). The second guide unit moves the transfer element and thus the optical bench in the x direction by adjusting the x adjustment element (or x slider) in the y direction. Preferably, a linear adjustment movement of the x adjustment element in the y direction is converted into a movement of the transmission element in the x-y plane by means of a diagonally oriented second guide. The movement of the transmission element can be converted into a linear movement of the optical bench in the x-direction by a linear guide unit coupling the y-adjustment element and the optical bench to each other.

The x-adjustment element or the x-slide can be movably coupled with the optical bench by a rod element. Thus, the adjustment of the x-adjustment element can be transferred to the optical bench via the rod element. Preferably, the rod element has a first end and a second end, wherein the rod element is coupled at its first end to the x-adjustment element or the x-slide and at its second end to the carrier element. The rod element is coupleable with the optical bench at a point between the first end and the second end. The bar element can be connected to the carrier element by means of a swivel hinge. Preferably, the bar element is fixed to the carrier element in such a way that it can be pivoted in the x-y plane. Furthermore, the rod element can be movably connected with the optical bench by a first guide unit. The bar element can also be movably connected to the x adjustment element or to the x slide via a second guide unit. The first guiding unit can be arranged for guiding the optical bench linearly in the y-direction. Preferably, the first guide means also allows the lever to rotate about the first guide pin. The second guide unit can be provided for transmitting the adjusting movement of the x-adjusting element to the bar element. Preferably, the adjusting movement of the x-adjusting element in the y-direction is converted into a pivoting movement of the bar element in the x-y plane. The second guide portion can be curved or curved. Preferably, the second guide means allows rotation of the lever about the second guide pin. The pivoting movement of the lever element can be converted into a linear movement of the optical bench in the x direction by a linear guide unit which couples the y-adjustment element and the optical bench to one another.

The rod element can be L-shaped. The lever element is coupled to the optical bench in the region where the two legs of the L intersect. Thus, the first guide unit can be arranged at an inflection point of the L-shaped bar element. The L-shape of the bar element also enables a more compact construction.

In a preferred embodiment, a part of the first guide element, for example the first guide pin or the first guide portion, is arranged on the fixing projection of the optical bench. The fixing projections of the optical bench can extend in the y-direction towards the carrier element. This enables a compact arrangement of the transmission elements of the x-adjustment movement and the y-adjustment movement to the optical bench.

The first guide unit may include a first guide pin and a first guide portion. The second guide means can also include a second guide pin and a second guide portion. In this case, the first guide pin and/or the second guide pin is preferably formed on the rod element or the transmission element. This simplifies the production process. The first guide and/or the second guide can comprise a recess, a guide groove or a hole, in particular an elongated hole. The first guide portion is preferably configured on the optical bench. The second guide is preferably formed on the x adjustment element or the x slider.

Furthermore, at least one slider guide element is provided, which guides the movement of the x-slider or the y-slider in the y-direction. The slider guide elements can be configured as guide pins or guide ribs either on the x-slider or the y-slider or on the carrier element. A corresponding slot or hole can be formed in the other of the x-slider or the y-slider and the carrier element. The slide guide element can also be configured as part of a dovetail guide, wherein another part of the dovetail guide can form an x-slide or a y-slide. This stabilizes the y adjustment movement of the x slider or the y slider.

Furthermore, at least one spring element is arranged between the optical bench and the carrier element. The spring element is arranged for providing a return force to the optical bench in the direction of the carrier element. This also serves to stabilize the movement of the optical bench. In addition, a backlash can be avoided in the event of a change in direction by the restoring force of the spring element.

Furthermore, according to the invention, a laser processing head for processing a workpiece by means of a laser beam comprises a cartesian positioning device for positioning a lighthead according to one of the preceding embodiments. Preferably, the optics are arranged in the beam path of the laser processing head. The carrier element of the cartesian positioning device can be mounted on the housing of the laser processing head by means of fixing means, for example screws. The optical axis of the laser processing head preferably extends in the z direction of the cartesian coordinate system, i.e. parallel to the x-y plane.

the terms x-direction, x-adjustment element, x-slide are equivalent in meaning to the first direction, first adjustment element, first slide, respectively, and can be replaced thereby. The terms y-direction, y-adjustment element, y-slide are equivalent in meaning to the second direction, second adjustment element, second slide, respectively, and can be replaced thereby. The first or x-direction is perpendicular to the second or y-direction.

Drawings

The invention is further explained below, for example with reference to the figures. It shows that:

FIG. 1 is a schematic top view of a Cartesian positioning apparatus in accordance with an embodiment of the invention;

FIG. 2 is a top view of the Cartesian positioning apparatus of FIG. 1 with two spring elements;

FIG. 3 is a top view of the Cartesian positioning apparatus of FIG. 1 moving in the y-direction;

FIG. 4 is a top view of the Cartesian positioning apparatus of FIG. 1 moving in the x-direction;

Fig. 5a and 5b are perspective side views of a cartesian positioning device according to another embodiment;

6a and 6b front and top views of a portion of the Cartesian positioning apparatus of FIG. 5;

FIGS. 7a and 7b are top and side views of an optical bench of the Cartesian positioning apparatus of FIG. 5; and

Fig. 8a and 8b are top and side views of the transfer element of the cartesian positioning device of fig. 5.

In the drawings, members corresponding to each other are provided with the same reference numerals.

Detailed Description

Fig. 1 shows a schematic top view of a cartesian positioning device for positioning a light fixture according to a first embodiment of the invention. The positioning device comprises a carrier element 20 on which an optical bench 10 for holding an optical tool is fixed. The carrier element 20 can be fastened to a housing of the laser processing head by means of fastening means 21, for example screws, so that the optical system can be arranged in the beam path of the laser processing head. The optical bench 10 is linearly movable along a first cartesian axis and a second cartesian axis by means of two adjusting elements 30 and 40, respectively. The movement along the first cartesian axis is independent of the movement along the second cartesian axis. The two cartesian coordinate axes are referred to below as the x-axis and the y-axis and are coordinate axes of a cartesian coordinate system or an orthogonal coordinate system. Movement in the x-direction or in the y-direction is also referred to as movement along the x-axis or along the y-axis. The motion in the x-direction is independent of the motion in the y-direction and therefore has no component in the y-direction.

a first adjustment element, the y adjustment element 30, for moving the optical bench 10 along the y-axis passes through the carrier element 20 such that one end of the y adjustment element 30 is accessible from the outside of the carrier element 20 for a positioning process of the optical bench 10 in the y-direction. At the other end of the y adjustment element, a y slider 50 is arranged, by means of which the y adjustment element 30 is coupled to the optical bench 10. Here, the y slider 50 and the optical bench 10 are movably connected to each other by the linear guide unit 15.

the linear guide unit 15 can include, for example, a slide rail configured on the y slider 50 and a rail guide configured on the optical bench 10. The linear guide unit 15 is arranged in the x direction and allows linear movement of the optical bench 10 in the x direction. y-slide 50 can have, for example, a dovetail groove in which a correspondingly shaped track of optical bench 10 is guided. It is naturally also possible to arrange the dovetail grooves on the optical bench 10 and the matching tracks on the y-slide 50 in reverse. The linear guide unit 15 is preferably configured such that the connection between the y-slider 50 and the optical bench 10 is tension and compression invariant. This prevents backlash when the direction of the y-adjustment movement changes. In the adjusting movement of the y-adjusting element 30 in the y-direction, the y-slide 50, which is fixedly coupled to the optical bench 10 in the y-direction, also moves in the y-direction and correspondingly moves the optical bench 10 by a pulling or pressing force along the y-axis.

The second adjustment element for movement of the optical bench 10 along the x-axis, i.e. the x-adjustment element 40, also passes through the carrier element 20, so that one end of the x-adjustment element 40 is accessible from the outside of the carrier element 20 for the positioning process of the optical bench 10 in the x-direction. At the other end of the x adjustment element 40, an x slider 60 is arranged, which is movably coupled with the optical bench 10 by a rod element 70.

The lever element 70 is fixed to the carrier element 20 by a swivel hinge 71 such that the lever element 70 can be swiveled about the swivel hinge 71 in the x-y plane. For this purpose, the carrier element 20 has fixing projections 22 which extend from the inner side of the carrier element 20 in the y-direction towards the optical bench 10 to facilitate the swinging movement of the lever element 70 about the swivel hinge 71. The rod element 70 is movably connected with the optical bench 10 by a first guide unit 80 and with the x-slider 60 by a second guide unit 90. As shown in fig. 1, when the lever member 70 is configured in an L-shape, it is possible to provide a rotation hinge 71 at one end of the L-shape, a first guide unit 80 at an inflection point where two legs of the L-shape intersect and a second guide unit 90 at the other end. This enables a space-saving arrangement for converting a linear adjustment movement of the x adjustment element 40 in the y direction into a pivoting movement of the rod element 70 in the x-y plane.

The first guide unit 80 includes a first guide pin 81 that moves in a first guide part 82. The first guide portion 82 extends linearly in the y direction, for example. The first guide pin 81 is preferably configured on the lever element 70, while the first guide portion 82 (e.g., a slot or elongated hole) is configured in the optical bench 10. Thus, the first guide unit 80 allows linear movement of the optical bench 10 in the y direction. In order to execute a pivoting movement of the lever element 70 about the swivel joint 71, the second guide element 90 also has a second guide pin 91, which moves in a second guide section 92. Although shown differently in the drawings for the sake of simplicity, a second guide portion 92 (e.g., a groove or an elongated hole) is preferably configured on the x-slider 60, while a second guide pin 91 is provided on the rod member 70. However, the invention is not so limited. However, the configuration of the first guide pin 81 and/or the second guide pin 91 on the rod element 70 simplifies the manufacturing. The second guide portion 92 can be configured to be curved or curvilinear. Not only the first guide portion 82 but also the second guide portion 92 allows rotational movement of the corresponding first guide pin 81 and second guide pin 91.

In the adjustment movement of the x-adjustment element 40 along the y-axis, the lever element 70 swings about the rotary hinge 71, whereby the optical bench 10 fixed in the y-direction by the linear guide unit 15 moves in the x-direction along the linear guide unit 15. The adjusting movement of the y-adjusting element 30 can be transmitted directly to the optical bench 10 via the y-slide 50, wherein the optical bench 10 is guided linearly in the y-direction by the first guide unit 80.

the optical bench 10 can have a fixing projection 11 extending from the optical bench 10 in the y-direction towards the carrier element 20. A part of the first guide element 80, namely the first guide pin 81 or the first guide 82, can be arranged on the fixing projection 11. This also enables a compact arrangement of the elements for transmitting the adjustment movement of the x-adjustment element 40 in the y-direction into a movement of the optical bench 10 along the x-axis.

Both the y adjustment element 30 and the x adjustment element 40 are axially fixed, thereby preventing movement of the optical bench 10 to the respective other cartesian direction. Both the y adjustment elements 30 and the x adjustment elements 40 can be adjusted parallel to each other in the y direction. The x-adjustment element and/or the y-adjustment element are preferably calibrated so that the determined adjustment movement can correspond to the exact value of the movement of the optical bench 10 along the respective cartesian coordinate axes.

In order to stabilize the movement of the y-slide 50 or the x-slide 60, slide guide elements 23, for example guide pins, can be provided on the carrier element 20, which pins move in corresponding holes of the y-slide 50 or the x-slide 60, respectively. Alternatively, the slide guide element 23 can also be arranged on the y slide 50 or the x slide 60 and guided in a corresponding bore in the carrier element 20.

Fig. 2 shows the cartesian positioning device of fig. 1, wherein a spring element 18 is also provided between the optical bench 10 and the carrier element 20 to prevent backlash during a change of direction.

Fig. 3 shows the cartesian positioning device of fig. 1, wherein the y-adjustment element 30 is adjusted in the y-direction (downward) by a predetermined amount. Thereby, the optical bench 10 connected with the y adjustment element 30 through the linear guide unit 15 and the y slider 50 is also moved in the y direction, wherein the first guide pin 81 is moved in the first guide portion 82.

Fig. 4 shows the cartesian positioning device of fig. 1, wherein the x adjustment element 40 is adjusted in the y direction (downward) by a predetermined amount. Thereby, the lever member 70 swings in the x-y plane about the rotation hinge 71, wherein the second guide pin 91 is guided along the second guide portion 92. The pivoting movement of the lever element 70 is transmitted to the optical bench 10 by the first guide unit 80 and converted into a linear x-movement by the linear guide unit 15.

fig. 5 to 8 show a second embodiment of the cartesian positioning device according to the invention. In this embodiment, instead of the pivoting movement of the lever element 70, a diagonal movement of the transmission element 170 is used for converting an adjusting movement of the x-adjusting element 140 in the y-direction into a movement of the optical bench 110 in the x-direction. This enables a compact, stable and gap-free construction.

fig. 5a and 5b show perspective side views of a cartesian positioning device according to a second embodiment. As in the first embodiment, the positioning device comprises a carrier element 120 on which is supported an optical bench 110 for holding the optical bench adjustable in the x-direction and in the y-direction. The carrier element 120 can comprise a fastening means 121 for fastening to a laser processing head. Furthermore, a sealing element 200 is provided in order to seal the carrier element 120 and the laser processing head, in particular, against dust particles. For the movement of the optical bench 110, a y adjustment element 130 and an x adjustment element 140 (see fig. 6b) are arranged on the carrier element 120, which adjustment elements are adjustable parallel to one another in the y direction and have a y slider 150 and an x slider 160, respectively. A transfer element 170 is arranged between the x-slider 160 and the optical bench 110 in order to convert an adjusting movement of the x-adjusting element 140 or the x-slider 160 in the y-direction into a movement of the optical bench 110 in the x-direction. Fig. 5a shows a first guide 182, which is formed in the optical bench 110 and in which a first guide pin 181 of the transmission element 170 is guided in the y-direction. This allows the optical bench 110 to move in the y-direction with respect to the x slider 160.

As can be seen from fig. 5b, the y-slider 150 is connected with the optical bench 110 by a linear guiding unit 115 arranged for guiding the movement of the optical bench 110 in relation to the y-slider 150 in the x-direction. Here, an x-linear guide element 111 is formed on the optical bench 110 and a corresponding x-linear guide element 151 is formed on the y-slide 150. As shown in fig. 5b, the linear guide unit 115 can comprise a dovetail guide.

As shown in fig. 5a and 5b, a cutout can be provided in the optical bench 110, in which cutout at least one spring element 118 can be mounted in order to connect the optical bench 110 with the carrier element 120. At least one spring element 118 can be arranged to provide a return force to the carrier element onto the optical bench 110. For example, at least one spring element 118 can be fixed on the carrier element 120 around the side of the optical bench 110 and adjacent to the x slider 160 and adjacent to the y slider 150, respectively. This reduces tolerances in the adjusting movement of the adjusting elements 130 and 140 or in the movement of the optical bench 110.

For stabilizing at least one of the y-slide 150 and the x-slide 160, a slide guide element 123 is provided, which is provided for linear guidance in the y-direction. For example, the valve guide element 123 can be of cylindrical design and guided in a bore of the y-slide 150 or the x-slide 160. Alternatively, at least one dovetail guide can be formed in the slide guide element 123 in order to guide the y slide 150 or the x slide 160 in the y direction.

A portion of the positioning device without the optical bench 110 and the transfer element 170 is shown in fig. 6a and 6 b. The carrier element 120 and the transfer element 170 can be coupled by an x-linear guide unit. For this purpose, the carrier element 120 preferably has a guide slit extending in the x direction, into which at least a part of the transmission element 170 fits. Alternatively, the carrier element 120 can be coupled with the transfer element 170 by a dovetail-shaped guide. At least one fastening element 122 can also be provided in the carrier element 120 in order to connect the transmission element 170 to the carrier element 120. In fig. 6a, two cylindrical fixing elements 122, such as screws or bolts, are shown by way of example, which are arranged in guide slots of the carrier element 120. The fastening element 122 is inserted into the transmission element guide 171 shown in fig. 8a in order to movably couple the transmission element 170 to the carrier element 120 in the x direction. Alternatively, the transmission element 170 has guide pins which move in slots formed in the carrier element 120 or in the guide slots.

Fig. 6a shows a slide guide element 123 with two dovetail-shaped guides in order to stabilize both the y slide 150 and the x slide 160. Obviously, it is also possible that only one of the two sliders 150 and 160 is guided by the slider guide element 123. The corresponding counter-parts for guiding the slider guide element 123 are configured as a y-linear guide element 152 in the y-slider 150 or as a y-linear guide element 161 in the x-slider 160. The y-slide 150 can therefore comprise two linear guide elements arranged perpendicularly to one another: such as an x-linear guide element 151 for guiding the optical bench 110 in the x-direction on the y-slider 150, and a y-linear guide element 152 for guiding the adjustment movement of the y-slider 150 in the y-direction. The x-slider 160 can comprise at least a y-linear guide element 161 for guiding the adjustment movement of the x-slider 160 in the y-direction. But it is also possible to provide one or more further linear guide elements. For example, interacting linear guide elements can be arranged on the x slider 160 and the y slider 150 in order to stabilize the movement relative to one another in the y direction.

In fig. 6b, the x-linear guide element 151 of the y-slider 150 is visible, on which the optical bench 110 can be moved in the x-direction. Furthermore, the x-slide 160 has a diagonal or second guide 192, which forms an angle of approximately 45 ° with the y-direction or with the x-direction. A second guide pin 191 (see fig. 8b) of the transmission element 170 is mounted in a second guide 192 of the x slider in order to move the transmission element 170 in an adjustment movement of the x slider 160 in the y direction to a direction of approximately 45 ° to the y direction.

Fig. 7a and 7b show views of the optical bench 110. The optical bench 110 has an x-linear guide element 111 that constitutes a linear guide unit with an x-linear guide element 151 of the y-slider 150. In other words, the optical bench 110 and the y-slider 150 are movably coupled to each other in the x-direction by the linear guide device. Further, the optical bench 110 has a first guide 182 that guides the movement in the y direction. The first guide 182 is configured at a 45 ° angle with respect to the second guide 192 in the x slider 160. The first guide pin 181 of the transfer element 170 is fitted into the first guide 182 of the optical bench 110 so as to enable movement of the optical bench in the y-direction with respect to the x-slider.

The transfer element 170 is shown in fig. 8a and 8 b. The transmission element 170 preferably has an L-shape, on one leg of which at least one transmission element guide 171, for example a slot or an elongated hole (extending in the x direction) is formed, and on the other leg of which the first guide pin 181 and the second guide pin 191 project in opposite directions perpendicular to the x direction and perpendicular to the y direction. In other words, the first guide pin 181 and the second guide pin 191 are configured on opposing surfaces of the transmission element 170. The first guide pin 181 and the second guide pin 191 can also be formed by a bolt or by a screw which passes through the transmission element. Since the first guide pin 181 is guided in the y direction in the first guide part 182 of the optical bench 110, the optical bench 110 can move in the y direction with respect to the x slider 160 in the adjustment of the y slider 150. The adjusting movement of the x slider 160 in the y direction is converted or transmitted into a movement of the optical bench 110 in the x direction by the guidance of the second guide pin 191 of the transmission element 170 coupled with the optical bench 110 in the diagonal guide 192 of the x slider 160 and by the linear guide unit 115 movably coupled with the optical bench 110 and the y slider 150 in the x direction.

It is naturally understood that concave or convex regions, for example linear guides or dovetail guides, can be interchanged.

Thus, according to the invention, a cartesian positioning device can be provided which enables an accurate and repeatable positioning of a light fixture in the x-direction and in the y-direction, wherein the positioning in the two cartesian directions x and y is independent of one another. Furthermore, a defined adjusting movement or rotation angle of the adjusting element can be assigned to the exact value of the linear movement of the optical bench 10 along the respective x-axis or y-axis by using a calibrated adjusting element, for example a micrometer screw. Since both the y adjustment element 30 and the x adjustment element 40 can be adjusted in the same direction, i.e., parallel to each other, in the y direction, the two adjustment elements 30 and 40 are arranged adjacent to each other on the carrier element 20. This improves the accessibility of the adjusting element to the user and also enables a space-saving arrangement of the adjusting element.

List of reference numerals

10 optical bench 90 second guide unit

11 fixing projection 91 second guide pin

15 linear guide unit 92 second guide part

18 spring element 110 optical bench

20 carrier element 111 x linear guide element

21 linear guide unit of fixing device 115

22 securing boss 118 spring member

23 slide guide element 120 carrier element

30 y adjustment element 121 securing means

40 x adjustment element 122 fixation element

50 y slider 123 slider guide element

60 x slider 130 y adjustment element

70 bar element 140 x adjustment element

71 rotating hinge 150 y slider

80 first guide unit 151 x linear guide element

81 first guide pin 152 y Linear guide element

82 first guide 160 x slider

161 y Linear guide element 182 first guide

170 transfer element 191 second guide pin

171 transfer member guide 192 second guide

181 first guide pin 200 sealing element