A collimator performance detection device

Abstract

The utility model belongs to detection device technical field, specifically provides a collimator performance detection device, including bottom plate, be equipped with optical path transmission schematic line on the bottom plate, the starting point of optical path transmission schematic line is equipped with collimator mounting seat, the terminal point of optical path transmission schematic line is equipped with analysis appearance fixed base, the turning point of optical path transmission schematic line all is equipped with reflection subassembly, reflection subassembly includes mirror and is used for adjusting mirror angle's mirror frame, analysis appearance and each reflection subassembly's incident light path all can detachably install optical path calibration block, be equipped with light transmission hole and calibration line on the optical path calibration block, calibration line and light transmission hole center line are perpendicular and intersect. The device can be on a platform to the spot size of collimator, spot form, divergence angle, directivity and directivity stability carry out test and evaluation, and the universality is good, can effectively detect above optical performance whether satisfies use technical requirement and reliability requirement.

Description

Technical Field

[0001] This utility model belongs to the technical field of testing devices, specifically relating to a collimator performance testing device. Background Technology

[0002] As the output device of the spatial amplification section of an ultrafast laser, the collimator is connected to the output light of the fiber seed source. The output spatial collimated light is used as the signal light of the ultrafast laser, and its directivity and directivity stability directly affect the amplification effect inside the ultrafast laser.

[0003] Current collimators suffer from problems such as inconsistent spot size, inconsistent spot shape, inconsistent divergence angle, and excessively large differences in the pointing angle of the output light. After being placed for a long time, the pointing stability changes, and the pointing behavior changes after being subjected to high and low temperature shocks.

[0004] If the uncertain optical properties of the collimator cannot be controlled, the amplification consistency, efficiency, and stability of the ultrafast laser will directly affect its final output performance. Therefore, it is necessary to test the optical performance of the collimator before use to determine whether it meets the technical and reliability requirements. Utility Model Content

[0005] The purpose of this invention is to provide a device for testing the optical performance of a collimator before use.

[0006] To address this, the present invention provides a collimator performance testing device, comprising a base plate; an optical path transmission schematic line is provided on the base plate; a collimator mounting base is provided at the starting point of the optical path transmission schematic line; an analyzer mounting base is provided at the ending point of the optical path transmission schematic line; a reflection component is provided at each turning point of the optical path transmission schematic line; the reflection component includes a reflector and a frame for adjusting the angle of the reflector; optical path calibration blocks are detachably installed on the incident optical paths of the analyzer and each reflection component; the optical path calibration block is provided with a light-transmitting hole and a calibration line; the calibration line is perpendicular to and intersects the center line of the light-transmitting hole.

[0007] Specifically, the collimator mounting base mentioned above includes a height-adjustable collimator pad.

[0008] Specifically, the base plate is provided with a first pin through hole; the optical path calibration block is provided with a first pin hole; the optical path calibration block is detachably mounted on the base plate through the pin, the first pin through hole and the first pin hole.

[0009] Specifically, the base plate is provided with a second pin through hole; the frame is provided with a second pin hole; the frame is detachably mounted on the base plate via the pin, the second pin through hole, and the second pin hole.

[0010] Specifically, the aforementioned frame includes a base, an adjustment plate, and a driving component; the adjustment plate is rotatably mounted on the base on one side; the driving component is used to adjust the angle between the adjustment plate and the base; and the reflector is mounted on the adjustment plate.

[0011] Specifically, the base is also provided with a fixing plate; the fixing plate is arranged opposite to the adjusting plate; the driving component is mounted on the fixing plate; and the reflector is mounted on the side of the adjusting plate away from the fixing plate.

[0012] Specifically, the aforementioned driving component includes an adjusting screw and a locking screw; the fixing plate has an adjusting hole and a locking hole; the adjusting screw passes through the adjusting hole and abuts against the adjusting plate to change the angle between the adjusting plate and the base; the locking screw passes through the locking hole and abuts against the adjusting plate to fix the angle between the adjusting plate and the base.

[0013] Specifically, the aforementioned locking screw is fitted with an elastic washer.

[0014] Specifically, the adjusting screw mentioned above is a fine-thread screw.

[0015] Specifically, the collimator performance testing device also includes a device mounting plate; the collimator mounting base and the analyzer fixing base are detachably mounted on the device mounting plate.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: The collimator performance testing device provided by this utility model can test and evaluate the collimator's spot size, spot shape, divergence angle, directivity, and directivity stability on a single platform. It has good versatility and can effectively detect whether the above optical performance meets the technical requirements and reliability requirements.

[0017] The present invention will be further described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the collimator performance testing device.

[0019] Figure 2 This is a top view of the collimator performance testing device.

[0020] Figure 3 This is a schematic diagram of the base plate structure of the collimator performance testing device.

[0021] Figure 4 This is a schematic diagram of the optical path calibration block structure of the collimator performance testing device.

[0022] Figure 5 This is an exploded view of the lens frame of the collimator performance testing device.

[0023] Figure 6 This is a side view of the frame of the collimator performance testing device.

[0024] Explanation of reference numerals in the attached drawings: 1. Base plate; 101. Schematic line of optical path transmission; 102. First pin through hole; 103. Second pin through hole; 2. Frame; 201. Base; 202. Adjustment plate; 203. Mounting slot; 204. Fixing plate; 205. Adjustment hole; 206. Locking hole; 207. Adjustment screw; 208. Locking screw; 209. Elastic pad; 210. Anti-slip pad; 211. Second pin hole; 3. Reflector; 4. Optical path calibration block; 401. Light transmission hole; 402. Calibration line; 403. First pin hole; 5. Collimator mounting base; 6. Analyzer mounting base; 7. Device mounting plate; 8. Collimator; 9. Beam quality analyzer. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] Reference Figure 1-4This utility model provides a collimator performance testing device, including a base plate 1; a light path transmission schematic line 101 is provided on the base plate 1; a collimator mounting base 5 is provided at the starting point of the light path transmission schematic line 101; an analyzer mounting base 6 is provided at the ending point of the light path transmission schematic line 101; a reflection component is provided at each turning point of the light path transmission schematic line 101; the reflection component includes a reflector 3 and a frame 2 for adjusting the angle of the reflector 3; a light path calibration block 4 can be detachably installed on the incident light path of the analyzer and each reflection component; the light path calibration block 4 is provided with a light-transmitting hole 401 and a calibration line 402; the calibration line 402 is perpendicular to and intersects the center line of the light-transmitting hole 401. The turning point of the light path transmission schematic line 101 is the light path reflection point, and the number of reflection components matches the number of turning points of the light path transmission schematic line 101. The reflector 3 of the next reflection component is located on the reflected light path of the previous reflection component, and the specific number is designed according to the actual situation. Since the longer the laser transmission distance, the more obvious the observed results, three sets of reflective components are generally sufficient to ensure the laser transmission distance in a limited space.

[0029] In use, first install the collimator 8 with standard collimation output on the collimator mounting base 5, ensuring that the output light path coincides with the starting light path direction of the light path transmission schematic line 101. Adjust each light path calibration block 4 so that the projection of its calibration line 402 on the base plate 1 coincides with the incident light path in its corresponding light path transmission schematic line 101, and the light path calibration block 4 does not block the reflected light from the reflector 3 behind it. Adjust the angle of the reflector 3 through the mirror frame 2 to adjust the reflected beam so that the laser is aligned with the light transmission hole 401 of the next light path calibration block 4. Complete all the reflection components from the beginning to the end of the light path transmission schematic line 101 in sequence, so that the beam reflected by the last reflector 3 passes through the light transmission hole 401 of the last light path calibration block 4 and is directed to the analyzer mounted on the analyzer mounting base 6 at the end, completing the beam transmission calibration. Then, keeping each reflection component still, remove the light path calibration block 4 and replace the standard collimator 8 with the collimator to be tested 8, and perform tests such as spot size, directivity, and pointing stability through the analyzer. The preferred analyzer is the beam quality analyzer 9.

[0030] Furthermore, the collimator mounting base 5 includes a height-adjustable collimator pad. The collimator pad effectively accommodates and is compatible with collimators 8 of different sizes and center heights.

[0031] Specifically, the base plate 1 is provided with a first pin through hole 102; the optical path calibration block 4 is provided with a first pin hole 403; the optical path calibration block 4 is detachably mounted on the base plate 1 via a pin, the first pin through hole 102, and the first pin hole 403. The optical path calibration block 4 can be quickly and easily installed or removed according to calibration and testing needs.

[0032] In one embodiment, the base plate 1 is provided with a second pin through hole 103; the frame 2 is provided with a second pin hole 211; the frame 2 is detachably mounted on the base plate 1 via pins, the second pin through hole 103, and the second pin hole 211. The number of second pin through holes 103 and second pin holes 211 can be set according to actual conditions. When it is necessary to adjust the optical path left and right, the mounting position of the frame 2 is changed through the pins, the second pin through holes 103, and the second pin holes 211, thereby achieving fine adjustment of the optical path left and right.

[0033] Furthermore, such as Figure 5-6 As shown, the mirror frame 2 includes a base 201, an adjusting plate 202, and a driving component. The adjusting plate 202 is rotatably mounted on the base 201 on one side. The driving component is used to adjust the angle between the adjusting plate 202 and the base 201. The reflector 3 is mounted on the adjusting plate 202. In use, the base 201 is installed in the corresponding position on the base plate 1, and the left and right positions are adjusted. The angle between the adjusting plate 202 and the base 201 is changed by the driving component, thereby adjusting the pitch angle of the reflector 3.

[0034] Specifically, the base 201 is also provided with a fixing plate 204; the fixing plate 204 is arranged opposite to the adjusting plate 202; the driving component is mounted on the fixing plate 204; the reflector 3 is mounted on the side of the adjusting plate 202 away from the fixing plate 204. Preferably, the base 201 is integrally formed with the fixing plate 204 to increase the stability of the entire frame 2 and prevent the fixing plate 204 itself from shifting on the base 201.

[0035] In a more detailed embodiment, the driving component includes an adjusting screw 207 and a locking screw 208; the fixing plate 204 has an adjusting hole 205 and a locking hole 206; the adjusting screw 207 passes through the adjusting hole 205 and abuts against the adjusting plate 202 to change the angle between the adjusting plate 202 and the base 201; the locking screw 208 passes through the locking hole 206 and abuts against the adjusting plate 202 to fix the angle between the adjusting plate 202 and the base 201.

[0036] In actual production, the adjusting plate 202 can be made of an elastic material. One end of the fixed plate 204 is fixed to the upper surface of the base 201. The adjusting plate 202 and the fixed plate 204 are arranged opposite each other with a certain distance between them, and a mounting groove 203 is provided on the side facing away from the fixed plate 204. After determining the installation position, one end of the elastic adjusting plate 202 is connected to the base 201. The elasticity of the adjusting plate 202 itself is used to adjust the angle between the adjusting plate 202 and the base 201. In use, the three reflectors are installed on the mounting groove 203 of the adjusting plate 202. The adjusting screw 207 is turned so that the end of the adjusting screw 207 presses against the adjusting plate 202, and the adjusting plate 202 is tilted forward to the desired position, changing the angle between the adjusting plate 202 and the base 201, thereby changing the pitch angle of the three reflectors. Then, the locking screw 208 is turned to keep the adjusting plate 202 in the forward tilt position, realizing the pitch adjustment of the optical path. After use, loosen the locking screw 208 to reset the adjusting plate 202.

[0037] To ensure that the locking screw 208 remains locked and to prevent the adjusting plate 202 from shifting due to loosening during use, which could lead to optical path misalignment, an elastic pad 209 is fitted onto the locking screw 208. Preferably, an anti-slip pad 210 can also be fitted onto the locking screw 208 to further increase friction and prevent slippage.

[0038] Since the adjustment of the optical path is generally a fine-tuning, the adjusting screw 207 is preferably a fine-thread screw, which effectively improves the dimming accuracy.

[0039] Furthermore, the collimator performance testing device also includes a device mounting plate 7; the collimator mounting base 5 and the analyzer mounting base 6 are detachably mounted on the device mounting plate 7. The device mounting plate 7 is mounted on one side of the base plate 1, and the stability of the collimator 8 and the analyzer is ensured by the device mounting plate 7. Example 1:

[0040] This embodiment provides a collimator performance testing device, including a base plate 1, a device mounting plate 7, a collimator mounting base 5, an analyzer mounting base 6, three sets of reflection components, and four optical path calibration blocks 4; The base plate 1 is provided with an optical path transmission schematic line 101; the optical path transmission schematic line 101 is provided with three optical path turning points, and the starting point and the ending point are located on the same side. The device mounting plate 7 is installed on the side of the base plate 1 near the start and end points. The collimator mounting base 5 and the analyzer mounting base 6 are detachably installed on the device mounting plate 7 by means of pins. The collimator mounting base 5 is set at the start point of the optical path transmission schematic line 101, and the analyzer mounting base 6 is set at the end point of the optical path transmission schematic line 101. The three sets of reflective components have the same structure, each including a reflector 3 and a frame 2; the three sets of frames 2 are arranged sequentially at the three optical path turning points of the optical path transmission schematic line 101. The mirror frame 2 includes a base 201, an adjusting plate 202, a fixing plate 204, an adjusting screw 207, and a locking screw 208. One end of the fixing plate 204 is fixed to the upper surface of the base 201. The adjusting plate 202 is arranged relative to the fixing plate 204 at a certain interval. A mounting groove 203 is provided on the side facing away from the fixing plate 204, and the mirror 3 is mounted on the mounting groove 203. The adjusting plate 202 is an elastic adjusting plate, one end of which is connected to the base 201 and can rotate relative to the base 201 by its own elasticity. A spring is fitted onto the locking screw 208. The base 201 includes a sliding pad 209 and an anti-slip pad 210; an adjusting screw 207 is a fine-thread screw; an adjusting hole 205 and a locking hole 206 are provided on the fixing plate 204, with the adjusting hole 205 located above the locking hole 206; the adjusting screw 207 passes through the adjusting hole 205 and abuts against the adjusting plate 202 to change the angle between the adjusting plate 202 and the base 201; the locking screw 208 passes through the locking hole 206 and abuts against the adjusting plate 202 to fix the angle between the adjusting plate 202 and the base 201; the base 201 is provided with a second pin hole 211. The optical path calibration block 4 is provided with a light-transmitting hole 401 and a calibration line 402, and a first pin hole 403 is provided at the bottom; the calibration line 402 is perpendicular to and intersects the center line of the light-transmitting hole 401; the four optical path calibration blocks 4 are respectively set on the incident light path of the beam quality analyzer 9 and the three sets of reflection components. The base plate 1 is provided with a first pin through hole 102 and a second pin through hole 103 corresponding to the optical path calibration block and the lens frame 2, respectively. The optical path calibration block 4 and the lens frame 2 are installed on the base plate 1 through pins and corresponding pin through holes and pin holes.

[0041] The testing method based on this collimator performance testing device is as follows: 1. Beam Transmission Calibration: Install the collimator 8 with standard collimation output on the collimator mounting base 5, and then place the collimator mounting base 5 on the device mounting plate 7, ensuring that its outgoing light path coincides with the starting light path direction of the light path transmission schematic line 101. Use the bottom pins to limit the collimator mounting base 5, ensuring consistent placement during testing. Adjust the four light path calibration blocks 4 so that the projection of their calibration lines 402 on the base plate 1 coincides with the incident light path in the corresponding light path transmission schematic line 101, and that the light path calibration blocks 4 do not obstruct the reflected light from the subsequent reflector 3. Starting from the light path outgoing direction, adjust the first reflective component, specifically by turning the adjusting screw 207 so that the end of the adjusting screw 207 presses against the adjusting plate 202, causing the adjusting plate 202 to tilt forward, thereby changing the pitch angle of the reflector 3 and adjusting the reflected beam from the reflector 3 to align the laser beam with the light-transmitting hole 401 of the second light path calibration block 4. Then, adjust the second and third reflective components in the same way so that the reflected beam of the second reflective component is aligned with the light-transmitting hole 401 of the third optical path calibration block 4, and the reflected beam of the third reflective component is aligned with the light-transmitting hole 401 of the fourth optical path calibration block 4 and directed towards the beam quality analyzer 9 mounted on the analyzer mounting base 6, thus completing the beam transmission calibration.

[0042] 2. Spot Test: After calibration, keep all reflective components stationary, remove all optical path calibration blocks 4, remove the collimator 8 from the standard collimation output, install the collimator 8 to be tested on the collimator mounting base 5, turn on the laser, and the laser is transmitted to the beam quality analyzer 9 after passing through the three reflectors 3. Open the software of the beam quality analyzer 9, and adjust the optimal parameters by adjusting the exposure, white balance and other parameters to make the energy distribution of the spot shown on the software normal. Read the D% value on the software as the roundness of the output spot of the collimator 8, and read the ellipticity on the software as the roundness of the output spot of the collimator 8.

[0043] 3. Collimator 8 Directivity Test: After calibration, keep all reflective components stationary, remove all optical path calibration blocks 4, remove the collimator 8 from the standard collimator output, install the collimator 8 to be tested on the collimator mounting base 5, turn on the laser, and the laser is transmitted to the beam quality analyzer 9 after passing through the three reflectors 3. Open the software of the beam quality analyzer 9, adjust the optimal parameters by adjusting the exposure, white balance and other parameters, so that the energy distribution of the light spot shown on the software is normal, read the centroid X1 and centroid Y1 on the software, and compare them with the centroid X0 and centroid Y0 of the standard collimator 8.

[0044] 4. Collimator 8 pointing stability test method: After calibration, keep all reflective components stationary, remove all optical path calibration blocks 4, remove the collimator 8 with standard collimation output, install the collimator 8 to be tested on the collimator mounting base 5, turn on the laser, and the laser is transmitted to the beam quality analyzer 9 after passing through the three reflectors 3. Open the software of the beam quality analyzer 9, continuously record the centroid X1 and centroid Y1 on the software, and calculate the maximum value X of centroid X1 and centroid Y1. max Y max and minimum value X min Y min The peak-to-peak values ​​ΔX = X in the X and Y directions are calculated using these two values. max -X min and ΔY=Y max -Y min Simultaneously, the change in ambient temperature ΔT is recorded. The beam propagation distance is 1m, therefore the pointing stability in the X direction is ΔX / ΔT, and the pointing stability in the Y direction is ΔY / ΔT.

[0045] The above examples are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this utility model.

Claims

1. A collimator performance testing device, characterized in that: The system includes a base plate (1); a light path transmission schematic line (101) is provided on the base plate (1); a collimator mounting base (5) is provided at the starting point of the light path transmission schematic line (101); an analyzer mounting base (6) is provided at the ending point of the light path transmission schematic line (101); a reflection component is provided at each turning point of the light path transmission schematic line (101); the reflection component includes a reflector (3) and a frame (2) for adjusting the angle of the reflector (3); a light path calibration block (4) can be detachably installed on the incident light path of the analyzer and each reflection component; a light transmission hole (401) and a calibration line (402) are provided on the light path calibration block (4); the calibration line (402) is perpendicular to and intersects the center line of the light transmission hole (401).

2. The collimator performance testing device as described in claim 1, characterized in that: The collimator mounting base (5) includes a height-adjustable collimator pad.

3. The collimator performance testing device as described in claim 1, characterized in that: The base plate (1) is provided with a first pin through hole (102); the optical path calibration block (4) is provided with a first pin hole (403); the optical path calibration block (4) is detachably installed on the base plate (1) through the pin, the first pin through hole (102) and the first pin hole (403).

4. The collimator performance testing device as described in claim 1, characterized in that: The base plate (1) is provided with a second pin through hole (103); the frame (2) is provided with a second pin hole (211); the frame (2) is detachably mounted on the base plate (1) through the pin, the second pin through hole (103) and the second pin hole (211).

5. The collimator performance testing device as described in claim 1, characterized in that: The frame (2) includes a base (201), an adjustment plate (202) and a drive component; the adjustment plate (202) is rotatably mounted on the base (201) on one side; the drive component is used to adjust the angle between the adjustment plate (202) and the base (201); the reflector (3) is mounted on the adjustment plate (202).

6. The collimator performance testing device as described in claim 5, characterized in that: The base (201) is also provided with a fixing plate (204); the fixing plate (204) is arranged opposite to the adjusting plate (202); the driving component is installed on the fixing plate (204); the reflector (3) is installed on the side of the adjusting plate (202) away from the fixing plate (204).

7. The collimator performance testing device as described in claim 6, characterized in that: The driving component includes an adjusting screw (207) and a locking screw (208); the fixing plate (204) has an adjusting hole (205) and a locking hole (206); the adjusting screw (207) passes through the adjusting hole (205) and abuts against the adjusting plate (202) to change the angle between the adjusting plate (202) and the base (201); the locking screw (208) passes through the locking hole (206) and abuts against the adjusting plate (202) to fix the angle between the adjusting plate (202) and the base (201).

8. The collimator performance testing device as described in claim 7, characterized in that: An elastic washer (209) is fitted onto the locking screw (208).

9. The collimator performance testing device as described in claim 7, characterized in that: The adjusting screw (207) is a fine-thread screw.

10. The collimator performance testing device as described in claim 1, characterized in that: It also includes a device mounting plate (7); the collimator mounting base (5) and the analyzer mounting base (6) are detachably mounted on the device mounting plate (7).

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