Corner resolution testing method, component, system and equipment and storage medium

Abstract

The invention provides a corner resolution testing method, assembly, system and device and a storage medium, and relates to the technical field of optical measurement. The rotation angle resolution testing method comprises the following steps: acquiring a distance measurement radius and distance measurement information; the distance measurement radius is a first distance between a rotation center of the rotation mechanism and a light spot formed by emergent light of the interferometer on the reflector, and the distance measurement information comprises a second distance, measured by the interferometer in real time, between the detection end of the interferometer and the reflector; determining distance change information of the second distance between the adjacent frames based on the distance measurement information; and determining the rotation angle resolution of the optical device based on the ranging radius and the distance change information. The rotation angle resolution testing method comprises the following steps: measuring a second distance between a detection end and an optical device reflector in real time by using an interferometer; and the rotation angle resolution of the optical device is determined based on the change distance of the first distance between the emergent light spot on the reflector and the rotation axis and the second distance between the adjacent frames.

Description

Technical Field

[0001] The present disclosure relates to the field of optical measurement technologies, and particularly relates to a method, a component, a system, a device, and a storage medium for testing angular resolution. Background Art

[0002] With the rapid development of precision manufacturing technologies, high-precision rotating optical devices are widely used in cutting-edge fields such as space remote sensing imaging systems and lidar. Such rotating optical devices generally require a rotational resolution reaching the sub-arcsecond level, which poses extremely high requirements for the measurement accuracy of measurement devices.

[0003] Currently, the testing method for the rotational angular resolution of rotating optical devices mainly relies on an optical autocollimator, which calculates the angular change by receiving the offset of the returned light spot. However, the testing accuracy of the optical autocollimator itself is limited, and the test data fluctuates greatly under environmental influences. For example, the testing error of the optical autocollimator is only 0.1″ / °C under temperature perturbations, and the testing error of the optical autocollimator also reaches 0.5″ under external mechanical jitters or air turbulence perturbations. Therefore, it is difficult to meet the accuracy requirements by measuring the rotational angle of a rotating optical device with an optical autocollimator.

[0004] Therefore, it is necessary to provide a method, a component, a system, a device, and a storage medium for testing angular resolution to improve the above problems. Summary of the Invention

[0005] The purpose of the present disclosure is to provide a method, a component, a system, a device, and a storage medium for testing angular resolution of an optical device, so as to improve the technical problem that the angular resolution of a rotating optical device is easily affected by external environmental perturbations and has a large error when tested by an optical autocollimator.

[0006] To achieve the above purpose and other related purposes, in a first aspect, the present disclosure provides a method for testing the rotational angular resolution of an optical device. This testing method is used for testing the rotational angular resolution of an optical device. The optical device to which it is applied includes a rotating mechanism and a reflector fixed on the rotating mechanism. The testing method includes the following steps:

[0007] Obtain a ranging radius and ranging information; the ranging radius is the first distance between the rotation center of the rotating mechanism and the light spot formed by the outgoing light of the interferometer on the reflector, and the ranging information includes the second distance between the detection end of the interferometer and the reflector measured by the interferometer in real time;

[0008] Based on the ranging information, determine the distance change information of the second distance between adjacent frames;

[0009] Determine the rotational angle resolution of the optical device based on the ranging radius and the distance change information.

[0010] In an example of the present disclosure, the obtaining of the ranging information includes:

[0011] The interferometer measures in real time the optical path difference between the emitted light from the detection end and the received reflected light; the interferometer corrects the optical path difference based on environmental parameters, where the environmental parameters include air temperature, humidity, and air pressure; the interferometer determines the second distance between the detection end and the mirror based on the optical path difference; and the second distances collected in each frame are summarized in sequence to obtain the ranging information.

[0012] In an example of the present disclosure, the determining of the distance change information of the second distance between adjacent frames based on the ranging information includes:

[0013] Traverse in chronological order to obtain the change distance of the second distance between any frame and the previous frame of the any frame to determine the distance change information of the second distance between adjacent frames; where the any frame does not include the first frame during the detection process.

[0014] In an example of the present disclosure, the determining of the rotational angle resolution of the optical device based on the ranging radius and the distance change information includes:

[0015] Determine the change angle between adjacent frames based on the ranging radius and the distance change information; determine the rotational angle resolution of the optical device based on the change angle between adjacent frames.

[0016] In an example of the present disclosure, the rotational angle test method further includes: obtaining the number of steps during the rotation of the rotating mechanism; determining the rotational angle of the optical device during the rotation based on the number of steps and the rotational angle resolution.

[0017] In an example of the present disclosure, the rotational angle test method further includes: determining the change distance of the second distance between the current frame and the first frame based on the ranging information; determining the rotational angle of the optical device during the rotation based on the ranging radius and the change distance between the current frame and the first frame.

[0018] In a second aspect, the present disclosure provides a test assembly for the rotational angle resolution of an optical device, and the test assembly includes an optical device, an interferometer, and a controller.

[0019] Wherein, the optical device includes a rotating mechanism and a mirror, and the mirror is fixed on the rotating mechanism; the interferometer has a detection end, the interferometer emits outgoing light from the detection end to the mirror, and receives the reflected light by the detection end; the interferometer determines a second distance between the detection end and the mirror based on an optical path difference between the emitted outgoing light and the received reflected light by the detection end; the controller is communicatively connected to the optical device and the interferometer; the controller is configured to: obtain a ranging radius and ranging information; the ranging radius is a first distance between the rotation center of the rotating mechanism and a light spot formed by the outgoing light of the interferometer on the mirror, and the ranging information is the second distance between the detection end of the interferometer and the mirror measured in real time by the interferometer; and determine a rotation angle of the optical device during rotation based on the ranging radius and the ranging information.

[0020] In a third aspect, the present disclosure provides a rotation angle resolution test system for an optical device, and the test system includes:

[0021] An information acquisition module, configured to acquire a ranging radius and ranging information; the ranging radius is a first distance between the rotation center of the rotating mechanism and a light spot formed by the outgoing light of the interferometer on the mirror, and the ranging information is the second distance between the detection end of the interferometer and the mirror measured in real time by the interferometer;

[0022] A distance acquisition module, configured to determine distance change information of the second distance between adjacent frames based on the ranging information;

[0023] An angle calculation module, configured to determine a rotation angle resolution of the optical device based on the ranging radius and the distance change information.

[0024] In a fourth aspect, the present disclosure provides a computer device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the steps of the method described in any one of the above examples are implemented.

[0025] In a fifth aspect, the present disclosure provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps of the method described in any one of the above examples are implemented.

[0026] The optical device rotation angle testing method provided by the present disclosure uses an interferometer to measure the second distance between the detection end and the mirror of the optical device in real time; and based on the first distance between the outgoing light spot on the mirror and the rotation axis and the change distance of the second distance between adjacent frames, the rotation angle resolution of the optical device is determined. In this optical device rotation angle testing method, the interferometer determines the second distance between the detection end and the mirror of the optical device based on the optical path difference between the outgoing light and the received reflected light, thereby reducing the interference of the environment on the measurement result and improving the testing accuracy of the rotation angle resolution in the optical interval. Description of the Drawings

[0027] The features and advantages of the present disclosure will be more clearly understood by referring to the accompanying drawings. The drawings are schematic and should not be construed as imposing any limitation on the present disclosure. In the drawings:

[0028] Figure 1 It shows a schematic flow chart of the rotation angle resolution testing method in an embodiment of the present disclosure;

[0029] Figure 2 It shows a schematic flow chart of the steps for obtaining ranging information in an embodiment of the present disclosure;

[0030] Figure 3 It shows a schematic flow chart of determining the rotation angle of the optical device during rotation in an embodiment of the present disclosure;

[0031] Figure 4 It shows a schematic flow chart of determining the rotation angle of the optical device during rotation in another embodiment of the present disclosure;

[0032] Figure 5 It shows a schematic diagram of the initial state of the rotation angle resolution testing component measuring the rotation angle resolution of the optical device in an embodiment of the present disclosure;

[0033] Figure 6 It shows a schematic diagram of the process of the rotation angle resolution testing component measuring the rotation angle resolution of the optical device in an embodiment of the present disclosure;

[0034] Figure 7 It shows a block diagram of the structure of the rotation angle resolution testing system in an embodiment of the present disclosure;

[0035] Figure 8 It shows a block diagram of the structure of a computer device in an embodiment of the present disclosure.

[0036] Explanation of Element Numbers:

[0037] 100. Optical device; 110. Rotation mechanism; 120. Mirror; 200. Interferometer; 210. Detection end; 300. Controller.

[0038] 10. Rotation Angle Resolution Test System; 11. Information Acquisition Module; 12. Distance Acquisition Module; 13. Angle Calculation Module. Detailed Implementation Manner

[0039] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0040] Please refer to Figures 1 to 8 . It should be noted that the illustrations provided in this embodiment only schematically illustrate the basic concept of the present disclosure. Therefore, only the components related to the present disclosure are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and proportions of the components in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0041] Please see Figures 5 to 6 , in the first aspect, the present disclosure provides a rotation angle resolution test component for an optical device 100. The rotation angle resolution test component includes an optical device 100, an interferometer 200, and a controller 300.

[0042] As Figure 5 and Figure 6 shown, the optical device 100 includes a rotation mechanism 110 and a mirror 120. The mirror 120 is fixed on the rotation mechanism 110, and the rotation mechanism 110 can drive the mirror 120 to rotate circumferentially around the central axis of the rotation mechanism 110. The interferometer 200 has a detection end 210. The detection end 210 and the mirror 120 of the optical device 100 are fixed on the same plane, and the detection end 210 is aligned with the mirror 120. The detection end 210 of the interferometer 200 emits outgoing light to the mirror 120 and receives the reflected light formed by the reflection of the outgoing light by the mirror 120. Both the outgoing light and the reflected light are coherent light of a preset wavelength. The interferometer 200 forms an interference pattern by using the outgoing light and the received reflected light, and obtains the optical path difference between the outgoing light emitted by the detection end 210 and the received reflected light based on the interference pattern. Finally, the second distance between the detection end 210 and the mirror 120 is determined based on the optical path difference. The second distance is specifically the distance between the detection end 210 and the light spot formed by the outgoing light on the mirror 120.

[0043] The controller 300 is communicatively connected to the optical device 100. The controller 300 drives the mirror 120 to rotate by controlling the rotating mechanism 110 and records the number of rotation steps of the rotating mechanism 110. The controller 300 is also communicatively connected to the interferometer 200. The controller 300 receives the ranging information measured by the interferometer 200. The ranging information includes the second distance between the detection end 210 of the interferometer 200 and the mirror 120 measured in real time by the interferometer 200.

[0044] The controller 300 obtains the ranging radius and the ranging information. The ranging radius is the first distance between the rotation center of the rotating mechanism 110 and the light spot formed by the outgoing light on the mirror 120. Then, based on the ranging radius and the ranging information, the controller 300 determines the rotation angle resolution and the rotation angle of the optical device 100 during rotation. Specifically, the controller 300, based on the ranging information, obtains the distance change between any adjacent frames during the measurement of the second distance and aggregates it into distance change information; the controller 300 determines the rotation angle resolution of the optical device 100 during rotation based on the ranging radius and the distance change information.

[0045] As Figure 5 and Figure 6 shown, during the test, the detection end 210 of the interferometer 200 can be first aligned with the mirror surface of the mirror 120 of the optical device 100, that is, the outgoing direction of the light emitted from the detection end 210 is perpendicular to the mirror 120 in the initial position. After the interferometer 200 and the optical device 100 are assembled, the ranging radius between the rotation center of the rotating mechanism 110 and the light spot formed by the outgoing light on the mirror 120 is measured. Then, the controller 300 controls the rotating mechanism 110 to drive the mirror 120 to rotate and simultaneously receives the ranging information measured by the interferometer 200. The controller 300 can determine the rotation angle resolution of the optical device 100 based on the ranging radius and the ranging information. It should be noted that during the test, the outgoing light can be kept approximately perpendicular to the mirror 120 to improve the accuracy of measuring the rotation angle resolution of the optical device 100.

[0046] The applicant's research found that when an optical autocollimator measures the rotation angle of an optical device 100, the optical components of the optical autocollimator are susceptible to the influence of environmental temperature, humidity, and air pressure, and the optical autocollimator is prone to cumulative errors during multiple measurements, thus amplifying the impact of environmental disturbances on the test accuracy; moreover, the optical autocollimator relies on the linearity of the optical path and it is difficult to completely eliminate environmental disturbances through refractive index compensation. Although the measurement results of the interferometer 200 will also be affected by environmental disturbances to the refractive index of air, such disturbance errors have a relatively small impact when not cumulatively amplified. Therefore, the distance measurement results obtained by the interferometer 200 have higher accuracy compared to the optical collimator, and can effectively improve the technical problem of large errors caused by external environmental disturbances when testing the angular resolution of the rotating optical device 100 with an optical autocollimator.

[0047] In addition, in some embodiments, the interferometer 200 has an environmental compensation unit. The environmental compensation unit corrects the measured optical path difference based on environmental parameters to eliminate the interference of the environment on the measurement results, thereby obtaining more accurate distance measurement information. Among them, the environmental parameters include air temperature, humidity, and air pressure. It should be noted that the interferometer 200 can select any commercially available interferometer 200 with an environmental compensation unit. For example, the interferometer 200 can select the IDS3010 picometer laser interferometer 200.

[0048] Please refer to Figures 1 to 6 , in a second aspect, the present disclosure provides a method for testing the angular resolution of an optical device. This testing method is used to measure the angular resolution of the optical device shown in the first aspect. This testing method includes the following steps:

[0049] Step S1: Obtain the ranging radius and ranging information. The ranging radius is the first distance between the rotation center of the rotating mechanism and the light spot formed by the outgoing light on the mirror; the ranging information includes the second distance between the detection end of the interferometer and the mirror measured in real time by the interferometer, that is, the distance between the detection end and the light spot formed by the outgoing light on the mirror.

[0050] In some embodiments, in step S1, to obtain the ranging information, specifically, it includes: the interferometer obtains the interference pattern formed by the interference between the outgoing light emitted from the detection end and the received reflected light, and determines the optical path difference between the outgoing light emitted from the detection end and the received reflected light based on the interference pattern; the interferometer determines the second distance between the detection end and the mirror based on the optical path difference; by summarizing the second distances collected by the interferometer in each frame in chronological order, the ranging information is obtained.

[0051] As Figure 2 shown, in some other embodiments, in step S1, to obtain the ranging information, specifically includes the following steps:

[0052] S11. The interferometer measures in real time the optical path difference between the emitted light from the detection end and the received reflected light. Specifically, the interferometer measures in real time the interference pattern formed by the interference between the emitted light from the detection end and the received reflected light, and the interferometer determines the optical path difference between the emitted light from the detection end and the received reflected light based on the interference pattern.

[0053] S12. The interferometer corrects the measured optical path difference based on environmental parameters to eliminate the test error caused by environmental disturbances. The environmental parameters include air temperature, humidity, and air pressure. For example, based on air temperature, humidity, and air pressure, the Edlen formula is used to correct the air refractive index, and the measured optical path difference is corrected using the corrected air refractive index.

[0054] S13. The interferometer determines the second distance between the detection end and the mirror based on the optical path difference and the wavelength of the emitted laser. Specifically, based on the following formula relationship δ = k × d, the second distance between the detection end and the mirror is determined, where δ is the optical path difference, d is the second distance, and k is the corrected air refractive index.

[0055] S14. The second distances collected by the interferometer in each frame are summarized in chronological order to obtain the ranging information.

[0056] Next, step S2 is executed. Based on the ranging information, the distance change information between adjacent frames of the second distance is determined.

[0057] In step S2, in chronological order, the change distance between the second distance in any frame and the previous frame of any frame is traversed and obtained to determine the distance change information between adjacent frames of the second distance; where any frame does not include the first frame during the detection process.

[0058] Specifically, the second distance is calibrated as d n , d n represents the second distance measured by the interferometer in the nth frame. The change distance between adjacent frames of the second distance can be expressed as Δd n = d n - d n-1 , Δd n is the change distance between the second distance in the nth frame and the (n - 1)th frame. The change distances Δd between adjacent frames are summarized in chronological order n , and the distance change information can be obtained. Where n ≥ 2.

[0059] Next, step S3 is executed. Based on the ranging radius and the distance change information, the rotational angle resolution of the optical device is determined.

[0060] As Figure 3 shown, in some embodiments, step S3 specifically includes the following steps:

[0061] S31. Determine the change angle between adjacent frames based on the ranging radius and the distance change information;

[0062] In step S31, based on the ranging radius and the distance change information, the rotational change angle of the optical device between any adjacent frames is obtained by traversing using the trigonometric function approximation relationship in chronological order. Among them, the change angle between each adjacent frame can be calculated according to Equation (1):

[0063] Δd n = DπΔθ n / 180 (1)

[0064] Among them, Δd n is the change distance of the second distance between the nth frame and the (n - 1)th frame, Δθ n is the rotational change angle of the optical device between the nth frame and the (n - 1)th frame, and D is the ranging radius. Among them, n ≥ 2.

[0065] S32. Determine the rotational angle resolution of the optical device based on the change angle between adjacent frames.

[0066] In step S32, based on the change angle Δθ n between each adjacent frame, the rotational angle resolution of the optical device is determined. For example, the average value of the change angles Δθ n between each adjacent frame is taken as the rotational angle resolution of the optical device. Another example is that when the actual rotational angle resolution is less than 0.1 second, the change angles Δθ n between each adjacent frame are approximately equal and can be used as the rotational angle resolution of the optical device.

[0067] As Figure 4 shown, in some embodiments, the rotational angle resolution test method further includes step S4 of obtaining the rotational angle of the optical device during rotation, specifically including:

[0068] S41. Obtain the number of steps during the rotation of the rotating mechanism, and the number of steps can be the number of frames during the detection process.

[0069] S42. Determine the rotational angle of the optical device during rotation based on the number of steps and the rotational angle resolution.

[0070] In step S42, the product of the number of steps and the rotational angle resolution is used as the rotational angle of the optical device during rotation.

[0071] As Figure 5 shown, in some other embodiments, the rotational angle resolution test method further includes step S5 of obtaining the rotational angle of the optical device during rotation, specifically including:

[0072] S51. Determine the change distance of the second distance between the current frame and the first frame based on the ranging information;

[0073] For example, let Δd represent the change distance between the current frame and the first frame, specifically Δd = d p - d1, where d p is the second distance measured in the current frame, and d1 is the second distance measured in the first frame.

[0074] S52. Determine the rotation angle of the optical device during the rotation process based on the ranging radius and the change distance between the current frame and the first frame.

[0075] In step S52, based on the ranging radius and the change distance between the current frame and the first frame, use the trigonometric approximation relationship to calculate the rotation angle of the optical device during the rotation process, specifically calculated according to Equation (2):

[0076] Δd = Dtanθ (1)

[0077] where D is the ranging radius and θ is the rotation angle of the optical device during the rotation process.

[0078] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present disclosure.

[0079] In a third aspect, in some embodiments, the present invention provides a rotation angle resolution test system 10 for an optical device, and the rotation angle resolution test system 10 corresponds one-to-one with the rotation angle resolution test method in the above embodiments.

[0080] As Figure 7 shown, the rotation angle resolution test system 10 includes an information acquisition module 11, a distance acquisition module 12, and an angle calculation module 13. The detailed description of each functional module is as follows:

[0081] The information acquisition module 11 is used to acquire the ranging radius and the ranging information; the ranging radius is the first distance between the rotation center of the rotation mechanism and the light spot formed by the outgoing light of the interferometer on the mirror, and the ranging information is the second distance between the detection end of the interferometer and the mirror measured by the interferometer in real time;

[0082] The distance acquisition module 12 determines the distance change information of the second distance between adjacent frames based on the ranging information;

[0083] The angle calculation module 13 determines the rotation angle resolution of the optical device based on the ranging radius and the distance change information.

[0084] In one embodiment, the information acquisition module 11 is specifically configured to:

[0085] The interferometer measures in real time the optical path difference between the emitted light from the detection end and the received reflected light.

[0086] The interferometer corrects the optical path difference based on environmental parameters, where the environmental parameters include air temperature, humidity, and air pressure.

[0087] The interferometer determines the second distance between the detection end and the mirror based on the optical path difference.

[0088] Summarize the second distances collected in each frame according to the time sequence to obtain the ranging information.

[0089] In one embodiment, the distance acquisition module 12 is specifically configured to:

[0090] Traverse and obtain the changing distance of the second distance between any frame and the previous frame of the any frame in the time sequence order to determine the distance change information of the second distance between adjacent frames; wherein, the any frame does not include the first frame during the detection process.

[0091] In one embodiment, the angle calculation module 13 is specifically configured to:

[0092] Determine the changing angle between adjacent frames based on the ranging radius and the distance change information.

[0093] Determine the rotational angle resolution of the optical device based on the changing angle between adjacent frames.

[0094] In one embodiment, the angle calculation module 13 is specifically configured to:

[0095] Obtain the number of steps during the rotation of the rotating mechanism.

[0096] Determine the rotational angle of the optical device during the rotation based on the number of steps and the rotational angle resolution.

[0097] In one embodiment, the angle calculation module 13 is specifically configured to:

[0098] Determine the changing distance of the second distance between the current frame and the first frame based on the ranging information.

[0099] Determine the rotational angle of the optical device during the rotation based on the ranging radius and the changing distance between the current frame and the first frame.

[0100] Specific limitations on the rotation angle resolution test system 10 can be referred to the limitations on the rotation angle resolution test method in the above text, which will not be elaborated here. Each module in the above rotation angle resolution test system 10 can be implemented in whole or in part by software, hardware, and their combinations. Each of the above modules can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so as to facilitate the processor to call and execute the operations corresponding to each of the above modules.

[0101] In one embodiment, a computer device is provided. The internal structure diagram of the computer device can be as Figure 8 shown. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external server through a network connection. When the computer program is executed by the processor, it realizes the functions or steps of an optical device rotation angle test method.

[0102] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the following steps are realized:

[0103] Obtain a ranging radius and ranging information; the ranging radius is the first distance between the rotation center of the rotation mechanism and the light spot formed by the outgoing light of the interferometer on the mirror, and the ranging information includes the second distance between the detection end of the interferometer and the mirror measured by the interferometer in real time;

[0104] Based on the ranging information, determine the distance change information of the second distance between adjacent frames;

[0105] Based on the ranging radius and the distance change information, determine the rotation angle resolution of the optical device.

[0106] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by the processor, the following steps are realized:

[0107] Obtain a ranging radius and ranging information; the ranging radius is the first distance between the rotation center of the rotation mechanism and the light spot formed by the outgoing light of the interferometer on the mirror, and the ranging information includes the second distance between the detection end of the interferometer and the mirror measured by the interferometer in real time;

[0108] Based on the ranging information, determine the distance change information of the second distance between adjacent frames;

[0109] Based on the ranging radius and the distance change information, determine the rotational angle resolution of the optical device.

[0110] It should be noted that for the functions or steps that can be achieved by the above computer-readable storage medium or computer device, reference can be made to the relevant descriptions on the server side and the client side in the foregoing method embodiments. To avoid repetition, they will not be described in detail here.

[0111] Those of ordinary skill in the art can understand that all or part of the processes of implementing the methods in the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above various methods. Among them, any reference to a memory, storage, database, or other medium used in the various embodiments provided in the present application can include non-volatile and / or volatile memories. Non-volatile memories can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memories can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

Claims

1. A method for testing the rotational angle resolution of an optical device, characterized in that, The optical device includes a rotating mechanism and a mirror fixed to the rotating mechanism, and the method for testing the rotational angle resolution includes: Obtaining a ranging radius and ranging information; the ranging radius is the first distance between the rotation center of the rotating mechanism and the spot formed by the outgoing light of the interferometer on the mirror, and the ranging information includes the second distance between the detection end of the interferometer and the mirror measured in real time by the interferometer; Based on the ranging information, determining the distance change information of the second distance between adjacent frames; Based on the ranging radius and the distance change information, determining the rotational angle resolution of the optical device.

2. The rotation angle resolution test method according to claim 1, wherein The obtaining of the ranging information includes: The interferometer measures in real time the optical path difference between the emission of the outgoing light from the detection end and the reception of the reflected light; The interferometer corrects the optical path difference based on environmental parameters, and the environmental parameters include air temperature, humidity, and air pressure; The interferometer determines the second distance between the detection end and the mirror based on the optical path difference; Summarizing the second distances collected in each frame in chronological order to obtain the ranging information.

3. The rotation angle resolution test method according to claim 1, characterized in that, The determining of the distance change information of the second distance between adjacent frames based on the ranging information includes: Traversing in chronological order to obtain the change distance of the second distance between any frame and the previous frame of the any frame to determine the distance change information of the second distance between adjacent frames; wherein, the any frame does not include the first frame during the detection process.

4. The rotational angle resolution test method according to claim 1, wherein The determining of the rotational angle resolution of the optical device based on the ranging radius and the distance change information includes: Based on the ranging radius and the distance change information, determining the change angle between adjacent frames; Based on the change angle between adjacent frames, determining the rotational angle resolution of the optical device.

5. The rotational angle resolution test method according to claim 1, characterized in that It further includes: Obtaining the number of steps during the rotation of the rotating mechanism; Based on the number of steps and the rotational angle resolution, determining the rotational angle of the optical device during rotation.

6. The rotation angle resolution test method according to claim 1, wherein It further includes: Based on the ranging information, determining the change distance of the second distance between the current frame and the first frame; Based on the ranging radius and the change distance between the current frame and the first frame, determining the rotational angle of the optical device during rotation.

7. A rotational angle resolution test assembly for an optical device, characterized in that, It includes: An optical device, which includes a rotating mechanism and a mirror, and the mirror is fixed to the rotating mechanism; An interferometer, which has a detection end, and the interferometer emits outgoing light from the detection end to the mirror and receives the reflected light by the detection end; the interferometer determines the second distance between the detection end and the mirror based on the optical path difference between the emission of the outgoing light from the detection end and the reception of the reflected light; A controller, which is communicatively connected to the optical device and the interferometer; the controller is configured to: Obtain a ranging radius and ranging information; the ranging radius is the first distance between the rotation center of the rotating mechanism and the spot formed by the outgoing light on the mirror, and the ranging information is the second distance measured in real time by the interferometer; Based on the ranging radius and the ranging information, determine the rotation angle of the optical device during rotation.

8. A rotational angle resolution test system for an optical device, characterized in that, Comprising: An information acquisition module for acquiring the ranging radius and the ranging information; The ranging radius is the first distance between the rotation center of the rotation mechanism and the light spot formed by the outgoing light of the interferometer on the mirror, and the ranging information is the second distance between the detection end of the interferometer and the mirror measured in real time by the interferometer; A distance acquisition module for determining the distance change information of the second distance between adjacent frames based on the ranging information; An angle calculation module for determining the rotation angle resolution of the optical device based on the ranging radius and the distance change information.

9. A computer device, characterized in that, Comprising: A processor and a memory; The memory is used for storing computer programs; The processor is connected to the memory, and the processor is used for executing the computer programs stored in the memory, so that the computer device executes the steps of the method according to any one of claims 1 to 6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 6 are realized.

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