Device for detecting beam deflection angle of beam splitter prism

Abstract

The utility model discloses a device for detecting a beam deflection angle of a beam splitter prism, which comprises a calibration module, a test module, a photoelectric auto-collimator and a control terminal, the test module is positioned between the calibration module and the photoelectric auto-collimator, the calibration module comprises an optical fiber collimator and a cube-corner prism, the test module comprises the beam splitter prism and a rotating platform, and the control terminal is connected with the optical fiber collimator and the cube-corner prism. The beam splitter prism is detachably arranged on the rotating platform, the transmitting end of the optical fiber collimator and the emitting direction of the cube-corner prism face the photoelectric auto-collimator, the control terminal is electrically connected with the rotating platform and the photoelectric auto-collimator, and before measurement, the photoelectric auto-collimator determines a reference datum by means of the optical fiber collimator and the cube-corner prism; in the measurement process, the rotating platform drives the beam splitter prism to rotate, and the control terminal records the change of the measurement result of the photoelectric autocollimator, so that the direct measurement of the beam deflection angle of the beam splitter prism is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of optical product detection, and particularly relates to a device for detecting the beam deflection angle of a beam splitting prism. Background Technique

[0002] Beam splitting prisms are widely used in multiple fields such as spectral analysis, laser devices, and optical instruments. They utilize the principles of light refraction and reflection to separate the incident light beam into different optical paths at specific angles, achieving the functions of beam splitting or beam combining of the optical path.

[0003] The beam deflection angle of a beam splitting prism is a crucial parameter, which directly determines the direction of the optical path and the optical performance of the optical system. Inaccuracies in the beam deflection angle can lead to a series of problems such as spot offset, blurred imaging, and decreased spectral resolution, seriously affecting the use effect and reliability of the product.

[0004] In view of the importance of calibrating the beam deflection angle of a beam splitting prism, one of the commonly used calibration methods at present is to measure the parallelism of the two sides of the beam splitting prism through other devices and then calculate the beam deflection angle according to a complex mathematical model. This method still has problems such as cumbersome steps and low efficiency in actual operation.

[0005] Moreover, due to the structural characteristics and material differences of the beam splitting prism, such as unknown differences between bonding materials, quality problems of the bonding layer and the coating layer, etc., they may all affect the measurement results of parallelism, further reducing the accuracy and reliability of calibration.

[0006] To sum up, a device capable of directly and accurately detecting the beam deflection angle of a beam splitting prism is needed to solve the above problems. Summary of the Invention

[0007] The purpose of the utility model is to provide a device for detecting the beam deflection angle of a beam splitting prism in view of the problems existing in the prior art.

[0008] To achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A device for detecting the beam deflection angle of a beam splitting prism includes a calibration module, a test module, an optoelectronic autocollimator, and a control terminal. The test module is located between the calibration module and the optoelectronic autocollimator. The calibration module includes an optical fiber collimator and a corner cube prism. The test module includes a beam splitting prism and a rotating platform. The beam splitting prism is detachably arranged on the rotating platform. The emission end of the optical fiber collimator and the outgoing direction of the corner cube prism are both set towards the optoelectronic autocollimator. The control terminal is electrically connected to the rotating platform and the optoelectronic autocollimator respectively.

[0010] The utility model integrates the calibration module, the test module, the optoelectronic autocollimator and the control terminal. Before measurement, the optoelectronic autocollimator determines the reference datum by means of the fiber collimator and the corner cube prism. During measurement, the rotating platform drives the beam splitter prism to rotate, and the control terminal records the change of the measurement result of the optoelectronic autocollimator, thereby realizing the direct measurement of the beam deflection angle of the beam splitter prism. This method avoids the cumbersome steps of indirectly calculating the beam deflection angle by measuring the parallelism of two surfaces in the traditional method, and improves the measurement efficiency and directness.

[0011] Preferably, the calibration module further includes a fiber laser, the fiber collimator is connected to the fiber laser through a fiber, and the control terminal is electrically connected to the fiber laser.

[0012] The fiber laser generates a laser beam, which is collimated through the collimating fiber to ensure that the beam remains parallel and stable in the propagation process.

[0013] Preferably, the calibration module further includes a first scissor lift and a first clamping bracket. The fiber collimator and the corner cube prism are respectively arranged on the first scissor lift through different first clamping brackets.

[0014] The first clamping bracket is used for detachably connecting the fiber collimator and the corner cube prism, and the first scissor lift is used for adjusting the heights of the fiber collimator and the corner cube prism.

[0015] Preferably, a second scissor lift is provided at the bottom of the optoelectronic autocollimator. The first scissor lift, the rotating platform and the second scissor lift are all arranged on the same optical breadboard.

[0016] The second scissor lift is used for adjusting the height of the optoelectronic autocollimator, and the optical breadboard is used for fixing the first scissor lift, the rotating platform and the second scissor lift.

[0017] Preferably, the first scissor lift, the rotating platform and the second scissor lift are arranged along the central axis of the optical breadboard.

[0018] The first scissor lift, the rotating platform and the second scissor lift are arranged with the central axis of the optical breadboard as the reference datum, so that the fiber collimator, the corner cube prism, the beam splitter prism and the optoelectronic autocollimator are located on the same axis system.

[0019] Preferably, the rotating platform includes a driving motor, a base, a turntable and a transmission device. The turntable is rotatably connected to the base, and the driving motor is connected to the turntable through the transmission device.

[0020] Preferably, the rotating platform further includes an optical support rod and a second clamping bracket. The second clamping bracket is arranged on the optical support rod, the optical support rod is arranged on the turntable, and the beam splitter prism is detachably arranged on the second clamping bracket.

[0021] The driving motor is used to drive the turntable to rotate. The turntable drives the optical support rod to rotate, and the optical support rod is used to adjust the height of the beam splitter prism.

[0022] Preferably, the control terminal includes a data processing module, a communication module and a display module. The display module is electrically connected to the data processing module, the data processing module is electrically connected to the communication module, and the communication module is electrically connected to the photoelectric autocollimator and the rotating platform respectively.

[0023] The data processing module reads the measurement results of the photoelectric autocollimator and the rotation angle of the rotating platform by using the communication module. The data processing module is used to process the measurement results fed back by the photoelectric autocollimator and display the processed results on the display module.

[0024] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0025] The present utility model integrates a calibration module, a test module, a photoelectric autocollimator and a control terminal. Before measurement, the photoelectric autocollimator determines a reference datum with the help of an optical fiber collimator and a corner cube prism. During the measurement process, the rotating platform drives the beam splitter prism to rotate, and the control terminal records the change of the measurement results of the photoelectric autocollimator, thereby realizing the direct measurement of the beam deflection angle of the beam splitter prism. This method avoids the cumbersome steps of indirectly calculating the beam deflection angle by measuring the parallelism of two surfaces in the traditional method, and improves the measurement efficiency and directness. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of the device for detecting the beam deflection angle of the beam splitter prism in the embodiment of the present utility model;

[0027] Figure 2 It is a schematic diagram of the control terminal in the embodiment of the present utility model;

[0028] In the figure: 1. Optical fiber collimator; 2. Optical fiber laser; 3. Corner cube prism; 4. Beam splitter prism; 5. Photoelectric autocollimator; 6. Rotating platform; 7. First scissor lift; 8. Second scissor lift; 9. Optical breadboard; 10. Data processing module; 11. Communication module; 12. Display module. Detailed Embodiments

[0029] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of the present utility model.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0031] As Figures 1-2 shown, the specific solution of the embodiment is as follows: A device for detecting the beam deflection angle of a spectroscopic prism includes a calibration module, a test module, a photoelectric autocollimator 5, and a control terminal. The test module is located between the calibration module and the photoelectric autocollimator 5.

[0032] The calibration module includes an optical fiber collimator 1, an optical fiber laser 2, a corner cube prism 3, a first scissor lift 7, and a first clamping bracket. The optical fiber collimator 1 is connected to the optical fiber laser 2 through an optical fiber. The first clamping bracket is detachably connected to the corner cube prism 3 or the optical fiber collimator 1. The optical fiber collimator 1 and the corner cube prism 3 are respectively arranged on the first scissor lift 7 through different first clamping brackets.

[0033] The emission end of the optical fiber collimator 1 and the outgoing direction of the corner cube prism 3 are both arranged towards the photoelectric autocollimator 5. The height of the optical fiber collimator 1 and the corner cube prism 3 is adjusted by the first scissor lift 7.

[0034] The test module includes a spectroscopic prism 4 and a rotating platform 6. The rotating platform 6 includes a driving motor, a base, a turntable, a transmission device, an optical support rod, and a second clamping bracket. The turntable is rotatably connected to the base. The driving motor is connected to the turntable through the transmission device. The driving motor is used to drive the turntable to rotate.

[0035] The second clamping bracket is arranged on the optical support rod. The optical support rod is arranged on the turntable. The spectroscopic prism 4 is detachably arranged on the second clamping bracket. The optical support rod is used to adjust the height of the spectroscopic prism 4.

[0036] The bottom of the photoelectric autocollimator 5 is provided with a second scissor lift 8. The first scissor lift 7, the rotating platform 6, and the second scissor lift 8 are all arranged on the same optical breadboard 9. The first scissor lift 7, the rotating platform 6, and the second scissor lift 8 are arranged along the central axis of the optical breadboard 9.

[0037] The control terminal includes a data processing module 10, a communication module 11 and a display module 12. The display module 12 is electrically connected to the data processing module 10, and the data processing module 10 is electrically connected to the communication module 11. The communication module 11 is respectively electrically connected to the photoelectric autocollimator 5, the rotary platform 6 and the fiber laser 2. The communication module 11 can control the opening and closing of the fiber laser 2. The data processing module 10 uses the communication module 11 to read the measurement result of the photoelectric autocollimator 5 and the rotation angle of the rotary platform 6. The data processing module 10 is used to process the measurement result fed back by the photoelectric autocollimator 5 and display the processed result on the display module 12.

[0038] The usage method of this embodiment is as follows:

[0039] Before starting to measure the beam deflection angle of the beam splitting prism 4, first determine the reference benchmark of the photoelectric autocollimator 5, and do not install the beam splitting prism 4, so that the outgoing light energy of the fiber collimator 1 can directly enter the photoelectric autocollimator 5.

[0040] Turn on the internal light source of the photoelectric autocollimator 5, so that the outgoing light of the photoelectric autocollimator 5 is reflected back to the photoelectric autocollimator 5 by the corner cube prism 3. At this time, two light spots will be displayed on the display module 12, representing the positions where the two beams of light are projected on the sensor of the photoelectric autocollimator 5. Adjust the attitude or position of the photoelectric autocollimator 5 to make the two light spots coincide, and record the position of the light spot after coincidence as the reference benchmark.

[0041] After determining the reference benchmark, turn off the internal light source of the photoelectric autocollimator 5 and install the beam splitting prism 4. The beam splitting prism 4 is a cube, and one plane of the beam splitting prism 4 is set facing the fiber collimator 1. The outgoing light of the fiber collimator 1 passes through the beam splitting prism 4 and enters the photoelectric autocollimator 5. At this time, one light spot will be displayed on the display module 12.

[0042] If there is no process error in the beam splitting prism 4, the light spot is located on the reference benchmark. However, due to the limitation of processing accuracy, there will be tolerances in the beam splitting prism 4, causing the light spot to deviate from the reference benchmark. Control the rotary platform 6 to rotate the beam splitting prism 4 to make the position of the light spot coincide with the reference benchmark, and record the angle of rotation of the rotary platform 6 during this process. The angle of rotation of the rotary platform 6 during this process is the beam deflection angle of the beam splitting prism 4.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the deflection angle of a beam splitter prism, characterized in that: The invention comprises a calibration module, a test module, a photoelectric autocollimator and a control terminal, wherein the test module is located between the calibration module and the photoelectric autocollimator, the calibration module comprises a fiber collimator and a corner cube prism, the test module comprises a beam splitter and a rotating platform, the beam splitter is detachably arranged on the rotating platform, the emission end of the fiber collimator and the emission direction of the corner cube prism are both arranged toward the photoelectric autocollimator, and the control terminal is electrically connected to the rotating platform and the photoelectric autocollimator respectively.

2. The device for detecting the deflection angle of a beam splitter prism according to claim 1, characterized in that: The calibration module also includes a fiber laser, the fiber collimator is connected to the fiber laser via an optical fiber, and the control terminal is electrically connected to the fiber laser.

3. The device for detecting the deflection angle of a beam splitter prism according to claim 1, characterized in that: The calibration module further includes a first scissor-type lifting platform and a first clamping bracket, and the optical fiber collimator and the corner cube prism are respectively arranged on the first scissor-type lifting platform through different first clamping brackets.

4. The device for detecting the deflection angle of a beam splitter prism according to claim 3, characterized in that: A second scissor-type lifting platform is provided at the bottom of the photoelectric autocollimator, and the first scissor-type lifting platform, the rotating platform and the second scissor-type lifting platform are all arranged on the same optical breadboard.

5. The device for detecting the deflection angle of a beam splitter prism according to claim 4, characterized in that: The first scissor lift table, the rotating platform and the second scissor lift table are arranged along the central axis of the optical breadboard.

6. The device for detecting the deflection angle of a beam splitter prism according to claim 1, characterized in that: The rotating platform comprises a driving motor, a base, a turntable and a transmission device. The turntable is rotatably connected to the base, and the driving motor is connected to the turntable through the transmission device.

7. The device for detecting the deflection angle of a beam splitter prism according to claim 6, characterized in that: The rotating platform further comprises an optical support rod and a second clamping bracket, wherein the second clamping bracket is arranged on the optical support rod, the optical support rod is arranged on the rotating platform, and the beam splitter prism is detachably arranged on the second clamping bracket.

8. The device for detecting the deflection angle of a beam splitter prism according to claim 1, characterized in that: The control terminal includes a data processing module, a communication module and a display module. The display module is electrically connected to the data processing module, the data processing module is electrically connected to the communication module, and the communication module is electrically connected to the photoelectric autocollimator and the rotating platform respectively.

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