Detachable cross-wire collimator and intense laser measurement system light path collimation device

Abstract

The utility model discloses a detachable cross wire collimator and an intense laser measuring system light path collimation device, the detachable cross wire collimator comprises a base, a fixed disc and a cross wire, the fixed disc is a hollow annular structure, the surface of the annular body is provided with a left limiting groove and a right limiting groove in the horizontal direction, and the left limiting groove and the right limiting groove are arranged on the base. The upper limiting groove and the lower limiting groove are formed in the vertical direction; the cross wire comprises a cross rod and a vertical rod, the cross rod is mounted in the left limiting groove and the right limiting groove in a gap manner in a bridging manner, and the vertical rod is mounted in the upper limiting groove and the lower limiting groove in a gap manner in a bridging manner; the cross point of the cross rod and the vertical rod is located at the center of the ring body. Compared with a traditional overall part dismounting scheme, the device has the advantages of being high in cross wire repeated positioning precision, easy to operate on site and the like, and is particularly suitable for on-site rapid high-precision collimation and focusing.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-power laser application, and relates to a detachable cross-wire collimator and a high-power laser measurement system optical path collimation device. Background Art

[0002] In strong laser testing and effect testing, it is usually necessary to make the strong laser be incident on the optical testing device at a set angle. The usually adopted scheme is to install two crosshairs at the incident end and the output end of the optical testing device respectively. When conducting a strong laser test, the collimated visible light of the strong laser is first incident on the two crosshairs, and then the angle and position of the optical testing device are adjusted so that the center of the laser passes through the two crosshairs respectively, indicating that the optical path has been collimated in the set direction.

[0003] The Chinese patent "A device and method for sampling far-field power attenuation of a strong laser" with application number 202111357218.9 discloses a method for sampling far-field power attenuation of a strong laser to solve the technical problem that the existing laser attenuation device cannot achieve optical axis alignment of the far-field laser system. In the test, two crosshairs are placed on the optical path of the attenuation device. Before the test, a visible collimation laser is used to aim the crosshairs for high-precision optical path alignment. When performing a strong laser test, since the aperture of the far-field light beam may be hundreds of mm, the two crosshairs need to be removed to prevent them from blocking the strong laser test on the optical path. The problem with this method is that the crosshairs need to be disassembled and installed for each test. The disassembly and assembly process is complicated and will affect the accurate positioning of the optical axis. Summary of the invention

[0004] The utility model aims to provide a detachable crosshair and a high-intensity laser optical path collimator, so as to overcome the problem of low optical axis positioning accuracy caused by the need to disassemble and assemble the crosshairs in the existing high-intensity laser test.

[0005] The technical solution of the utility model is as follows:

[0006] A detachable cross wire collimator comprises a base, a fixed disk on the upper part of the base and a cross wire, wherein the fixed disk is a hollow ring structure, and the surface of the ring body is provided with a left limit groove and a right limit groove in the horizontal direction, and an upper limit groove and a lower limit groove in the vertical direction;

[0007] The cross wire comprises a horizontal bar and a vertical bar, wherein the horizontal bar is installed in a gap manner in the left limit groove and the right limit groove, and the vertical bar is installed in a gap manner in the upper limit groove and the lower limit groove; the intersection of the horizontal bar and the vertical bar is located at the center point of the ring body.

[0008] In the above-mentioned detachable cross-wire collimator, the hollow annular structure is a circular ring.

[0009] In the above-mentioned detachable cross wire collimator, the lower limit groove is a non-through structure along the bottom side of the ring body.

[0010] In the above-mentioned detachable cross-wire collimator, the horizontal rod and the vertical rod are fixedly connected as a whole through the cross-overlapping area.

[0011] In the above-mentioned detachable cross wire collimator, the fixing plate is provided with locking screws for fixing the horizontal rod and the vertical rod.

[0012] In the above-mentioned detachable cross-wire collimator, the annular inner diameter of the fixed disk is 100 mm to 300 mm.

[0013] In the above-mentioned detachable cross-wire collimator, the diameter of the rod body of the horizontal rod and the vertical rod is 0.5-2mm.

[0014] In the above-mentioned detachable cross wire collimator, the width of the notch of the limiting groove is 0.02-0.05mm larger than the diameter of the rod body of the horizontal rod and the vertical rod.

[0015] The invention discloses an optical path collimating device for a high-power laser measuring system. No less than two detachable fork-wire collimators are arranged on the optical path of the high-power laser measuring system, and one of the fork-wire collimators is arranged at the light inlet.

[0016] In the optical path collimation device of the high-intensity laser measurement system, a cross-wire collimator is arranged in the relay optical path or the light outlet.

[0017] The beneficial technical effects of the utility model are as follows:

[0018] 1. The utility model designs the cross hair collimator as a detachable structure, and the cross hairs are detachably fixed on the annular disc through four limit grooves. Before the strong laser test, the light path can be aligned through the cross hairs, and when the strong laser test is carried out, the cross hairs are disassembled to facilitate the re-alignment of the light path in the next test. Compared with the traditional overall component disassembly solution, it has the characteristics of high cross hair repeat positioning accuracy and simple on-site operation, and is particularly suitable for fast and high-precision collimation and light alignment on-site.

[0019] 2. The utility model sets no less than two cross-wire collimators at the light inlet, light outlet or relay light path, and uses visible collimated light for collimation before the test, ensuring that the high-intensity laser measurement system can be incident in the set laser direction, meeting the test requirements of the high-intensity laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the fixed disk of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the fixed disk after the cross wire is installed in the utility model;

[0022] Figure 3This is a front view of the fork wire collimator of the utility model;

[0023] Figure 4 It is a side view of the fork wire collimator of the utility model;

[0024] Figure 5 The utility model is a schematic diagram of the principle of the optical path alignment device of the high-power laser measurement system.

[0025] The accompanying drawings are marked as follows: 1-fixed plate; 2-center point; 3-vertical rod; 4-cross rod; 5-locking screw; 6-base; 7-long hole; 8-cross wire collimator; 9-high-power laser measurement system; 11-upper limit slot; 12-lower limit slot; 13-left limit slot; 14-right limit slot; 21-optical element; 22-incident light beam, 23-outgoing light beam. Implementation

[0026] The existing optical path alignment device uses a removable crosshair. When the optical path is aligned, the crosshair is placed in the optical path to be aligned. When the optical path alignment of the measurement system is completed, the crosshair device is removed and marked, and then installed at the marked position next time. However, this method is a bit cumbersome, especially when the laser direction needs to be checked every time a strong laser test is performed, which is inefficient and cannot guarantee the accuracy of the incident light angle.

[0027] like Figures 1 to 4 As shown, the detachable crosswire collimator of the utility model comprises a base 6, a fixed disk 1 on the upper part of the base 6 and a crosswire, wherein the fixed disk 1 is a hollow ring structure, preferably a circular ring structure, and the surface of the ring body is provided with a left limit groove 13 and a right limit groove 14 in the horizontal direction, and an upper limit groove 11 and a lower limit groove 12 in the vertical direction; the crosswire comprises a horizontal rod 4 and a vertical rod 3, the horizontal rod 4 is installed in the left limit groove 13 and the right limit groove 14 in a gap manner, and the vertical rod 3 is installed in the upper limit groove 11 and the lower limit groove 12 in a gap manner; the intersection of the horizontal rod 4 and the vertical rod 3 is located at the center 2 of the ring body.

[0028] Usually, the inner diameter of the ring of the fixed disk 1, that is, the beam of the strong laser, is 100mm to 300mm. When the cross wires are removed for the strong laser test, it can be ensured that the beam passes through the hollow ring without obstruction. The rod body diameter of the horizontal rod 4 and the vertical rod 3 is 0.5-2mm, wherein the width of the limit groove is slightly wider than the rod body diameter by 0.02-0.05mm, and the depth is 2-5mm, which can accommodate two overlapping cross wires. The shape and position tolerance of the limit groove is ensured by precision machining, which can be easily disassembled and ensure the installation position accuracy.

[0029] The horizontal bar 4 and the vertical bar 3 can be separate independent rod bodies. When installing, the horizontal bar 4 and the vertical bar 3 are placed in order. At this time, the lower limit groove 12 along the bottom side of the ring body needs to be a non-penetrating structure to ensure that the vertical bar 3 does not fall along the lower limit groove 12. Other limit grooves can be processed into a through structure or a non-penetrating structure. In addition, the horizontal bar 4 and the vertical bar 3 are also fixedly connected as a whole through the cross-overlapping area. For example, they are directly processed into a cross structure by wire cutting during processing, or the horizontal bar 4 and the vertical bar 3 can be glued and fixed at the center intersection.

[0030] As a further embodiment, Figure 3 and Figure 4 As shown, locking screws 5 for fixing the crossbar and the vertical rod are provided on the fixing plate 1. After the crossbar 4 and the vertical rod 3 are placed in the limiting groove, the locking screws 5 can be tightened to fix them on the ring to prevent them from falling. Figure 3 In the figure, the base 6 is a split structure, fixed on the high-power laser measurement system, and is provided with horizontal and vertical long holes 7, and the left and right and up and down position adjustment of the fork wire is achieved through the fixing screws in the long holes. After the alignment and light alignment is completed, the two cross wires on the fork wire are removed, and the high-power laser can directly pass through the disk fixing the fork wire without obstacles; before the next light emission, when the optical path needs to be checked, just install the cross wire again and repeat the process.

[0031] like Figure 5 As shown, the strong laser measurement system includes several optical elements 21 inside. The optical element 21 can be a reflector or other device that is sensitive to the incident angle. During the test, the incident light beam 22 and the outgoing light beam 23 are required to be incident and emitted at the set angle. At this time, two fork wire collimators 8 are installed inside the strong laser measurement system 9. One is set at the position of the light inlet in the figure, and the other is set at the outlet or relay light path. During installation, all optical devices are placed in the optical path based on the fork wire. Before the test, the laser's own visible light laser is used as the collimated light source, and the high and low pitch of the strong laser measurement system 9 is adjusted so that the visible light passes through the two fork wires in turn, thereby ensuring that the laser beam is incident at the set angle during the test. After the collimation and alignment are completed, the two cross steel wires on the fork wire are removed, and the strong laser can directly pass through the disc where the fork wire is installed without obstacles; before the next light emission, when the optical path needs to be reviewed, just install the cross steel wire again and repeat it.

[0032] The implementation steps of the utility model are as follows

[0033] 1. Production of cross wires: Two high-strength carbon steel wires with a diameter of 0.5-2mm are made through precision processing and heat treatment to ensure their outer diameter parameters, straightness and rigidity.

[0034] 2. Positioning of the fork wire: Two carbon steel wires are spliced ​​into a cross in space and are movably and detachably fixed on a hollow fixed disc.

[0035] 3. When integrating the optical system, first fix the crosshairs at the corresponding position according to the designed optical path. Under the irradiation condition of visible collimated light, fix the crosshairs and the adjustment base 6 on the bottom plate, and adjust the horizontal and vertical directions of the crosshair base. After the position is determined, lock the crosshairs and the adjustment bracket to complete the installation. Use the crosshairs as a reference and install and lock the positions of other optical devices under the guidance of the collimated laser.

[0036] 4. Disassembly and reassembly of the fork wire: When disassembling, you only need to remove the fork wire, fix the disc and the base, and the limit groove on the fixed disc 1 can accurately locate the original position of the fork wire. When reassembling, you only need to clamp the two fork wires on the limit groove to ensure that the relative position remains unchanged from the last disassembly.

[0037] Since the control error of the limit groove and the carbon steel wire diameter is within 0.05mm, and the optical path distance between the front and rear fork wires in the measurement system is hundreds of millimeters, when this method is used to align the high-intensity laser measurement system, the angle effect caused by the fork wire installation is <0.01°.

[0038] When the fork wire collimator of the utility model aligns the optical path, the strong laser can pass through the disc bracket of the fork wire without obstacles, without disassembling the entire fork wire base. This solution of only disassembling the fork wire has the characteristics of high repeatability positioning accuracy and simple on-site operation, and is particularly suitable for fast and high-precision collimation and alignment of light on-site.

Claims

1. A detachable crosshair collimator, comprising a base (6), a fixing plate (1) on the upper part of the base (6), and a crosshair, characterized in that: The fixed plate (1) is a hollow annular structure, and the surface of the annular body is provided with a left limit groove (13) and a right limit groove (14) in the horizontal direction, and an upper limit groove (11) and a lower limit groove (12) in the vertical direction; The cross wire comprises a horizontal bar (4) and a vertical bar (3); the horizontal bar (4) is installed in a gap-bridged manner in a left limit groove (13) and a right limit groove (14); the vertical bar (3) is installed in a gap-bridged manner in an upper limit groove (11) and a lower limit groove (12); the intersection of the horizontal bar (4) and the vertical bar (3) is located at the center point (2) of the ring body.

2. The detachable cross-wire collimator according to claim 1, characterized in that: The hollow annular structure is a circular ring.

3. The detachable cross-wire collimator according to claim 1, characterized in that: The lower limit groove (12) is a non-through structure along the bottom side of the ring body.

4. The detachable cross-wire collimator according to claim 1, characterized in that: The horizontal rod (4) and the vertical rod (3) are fixedly connected as one through the cross-overlapping area.

5. The detachable cross-wire collimator according to claim 1, characterized in that: The fixing plate (1) is provided with locking screws (5) for fixing the horizontal rod and the vertical rod.

6. The detachable cross-wire collimator according to claim 1, characterized in that: The annular inner diameter of the fixed disk (1) is 100 mm to 300 mm.

7. The detachable cross-wire collimator according to claim 1, characterized in that: The diameters of the crossbar (4) and the vertical bar (3) are 0.5-2 mm.

8. The detachable cross-wire collimator according to claim 1, characterized in that: The width of the limiting groove is 0.02-0.05 mm larger than the diameter of the rod body of the horizontal rod (4) and the vertical rod (3).

9. An optical path alignment device for a high-power laser measurement system, characterized in that: No less than two detachable fork-wire collimators (8) as claimed in any one of claims 1 to 8 are arranged on the optical path of the high-intensity laser measurement system, wherein one of the fork-wire collimators (8) is arranged at the light inlet.

10. The optical path alignment device for a high-power laser measurement system according to claim 9, characterized in that: A cross-wire collimator (8) is provided in the relay optical path or the light outlet.

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