A collimator optical axis calibration system

Abstract

This invention discloses an optical axis calibration system for a collimator. The system includes a collimator and a light source generating device. The collimator includes a primary reflector and a secondary reflector, the centers of which are located on the central axis of the collimator. An observation port is provided on the side wall of the collimator. The light source generating device generates a beam of incident light perpendicular to the central axis of the collimator. This beam travels from the observation port to the center of the secondary reflector, is reflected by the secondary reflector, reaches the primary reflector, is reflected again by the primary reflector, returns to the secondary reflector, and finally returns to the light source generating device from the observation port after being reflected by the secondary reflector. By adjusting the angles of the primary and / or secondary reflectors, the incident light generated by the light source generating device and the reflected light returning from the secondary reflector are made to coincide, thus completing the calibration. This invention does not rely on large-scale experimental equipment, has a simple structure, is easy to implement, and can solve the problem of adaptability to external fields and avoid the accumulation of errors caused by redundant results.

Description

Technical Field

[0001] This utility model relates to the field of optical measurement technology, and more specifically, to an optical axis calibration system for a collimator. Background Technology

[0002] Collimator optical axis calibration is crucial for ensuring the accuracy of optical equipment. By calibrating the consistency of optical, electrical, and mechanical axes, it ensures the high-precision operation of critical equipment such as missile guidance, satellite imaging, and lidar, directly impacting weapon hit rates, industrial testing reliability, and autonomous driving safety. Existing collimator optical axis calibration technologies have the following drawbacks: First, insufficient adaptability to outdoor environments: Traditional large-aperture collimators are bulky, expensive, and dependent on fixed laboratory environments, failing to meet the needs of portable field setup and adjustment. Second, structural redundancy and error superposition: The calibration system relies on multiple sets of auxiliary optical components such as reflectors and beam splitters, resulting in high optical path complexity, and installation deviations of additional components can easily introduce secondary errors. Third, limited multi-axis collaborative accuracy: Limited by the collimator aperture and beam splitter accuracy, when the optical axis spacing of a multi-aperture system is large, beam coverage is incomplete, leading to parallelism errors (such as the superposition of fiber core diameter and guide rail switching errors). Utility Model Content

[0003] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides an optical axis calibration system for collimators that does not rely on large-scale experimental equipment, has a simple structure, is easy to implement, and can solve the problem of adaptability to external fields and avoid the superposition of errors caused by redundant results.

[0004] To achieve the above objectives, this utility model provides a collimator optical axis calibration system, comprising a collimator and a light source generating device; the collimator includes a primary reflector and a secondary reflector, the centers of which are located on the central axis of the collimator; an observation port is provided on the side wall of the collimator; the light source generating device generates an incident light beam perpendicular to the central axis of the collimator, this incident light beam reaches the center of the secondary reflector from the observation port, is reflected by the secondary reflector to the primary reflector, can be reflected again by the primary reflector and return to the secondary reflector, and finally reflected by the secondary reflector and returns to the light source generating device from the observation port; by adjusting the angle of the primary reflector and / or the secondary reflector, the incident light generated by the light source generating device and the reflected light returning from the secondary reflector coincide, thus completing the calibration.

[0005] In some embodiments, the light source generating device includes a housing, a light source, and a mounting base; the mounting base fixes the light source inside the housing, and the laser beam emitted by the light source coincides with the axis of the housing.

[0006] In some embodiments, the mounting base has an observation surface with a hole structure through which a laser beam emitted from the light source can pass.

[0007] In some embodiments, the side of the housing is provided with an opening through which the observation surface can be seen, and the reflected light returning from the secondary reflector to the light source generating device can be obtained from the observation surface.

[0008] In some implementations, when additional light spots are formed on the observation surface, the angles of the primary and / or secondary mirrors are adjusted to perform optical axis calibration.

[0009] In some implementations, optical axis calibration is not required when no additional light spot is formed on the observation surface.

[0010] In some implementations, multiple concentric rings are arranged on the observation surface, centered on the aperture structure, to evaluate the degree of optical axis misalignment of the collimator.

[0011] In some embodiments, the housing includes a first housing and a second housing; the first housing has a first segment and a second segment connected to the first segment, the inner diameter of the second segment and the second housing is smaller than that of the first segment; the second segment is used to connect the second housing, thereby connecting the second housing to the first housing.

[0012] In some implementations, the mounting bracket secures the light source within the second housing.

[0013] In some embodiments, the opening is located on the side wall of the second housing.

[0014] In summary, compared with the prior art, the above-described technical solution conceived by this utility model has the following beneficial effects: A light source generating device is set at the observation port of the collimator, and incident light is generated by the light source generating device and enters the collimator from the observation port. Based on the principle that the reflected light reflected back to the light source generating device when the optical axis is in the correct position should coincide with the incident light, the optical axis of the collimator is calibrated; only the light source generating device needs to be installed to achieve optical axis adjustment, and the light source generating device has a simple structure, is small and portable, so that the optical axis calibration system is not dependent on the laboratory setting, is simple to operate, and is flexible to use; furthermore, it can effectively reduce the influence of assembly accuracy and operation method on calibration accuracy, has strong anti-interference ability, and the influence of temperature and external stray light on the calibration system is weak. Depending on the focal length, the calibration accuracy can be maintained at about 1mm. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the working principle of a collimator;

[0016] Figure 2 This is a schematic diagram illustrating the working principle of the optical axis calibration system of the collimator according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the light source generating device according to an embodiment of the present invention;

[0018] Figure 4 yes Figure 3 A three-dimensional view of the light source generating device shown. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0020] like Figure 1 As shown, the collimator includes a primary mirror 101 and a secondary mirror 103. The primary mirror 101 is a concave mirror, and the secondary mirror 103 is a plane mirror. The centers of both the primary mirror 101 and the secondary mirror 103 are located on the central axis of the collimator. The primary mirror 101 is perpendicular to the central axis of the collimator, and the secondary mirror 103 is tilted towards the primary mirror 101, forming a 45-degree angle with the central axis of the collimator. A set of parallel rays parallel to the central axis of the collimator enters the collimator and reaches the primary mirror 101. After being reflected by the primary mirror 101, the rays reach the secondary mirror 103, and after being reflected by the secondary mirror 103, they exit from the observation port 105 located on the side wall of the collimator, ultimately converging on the focal plane 107 of the next stage system. To ensure that the focal plane 107 has no rotation angle, it is necessary to ensure that the optical axis of the focal plane 107 is in the same plane as the central axis of the collimator, that is, to make the optical axis of the collimator coincide with the central axis of the collimator.

[0021] like Figure 2 As shown, the collimator optical axis calibration system of this embodiment includes a collimator and a light source generating device 201. The light source generating device 201 is located at the observation port 105 and generates an incident light beam perpendicular to the central axis of the collimator. This incident light beam travels from the observation port 105 to the center of the secondary reflector 103, is reflected by the secondary reflector 103, reaches the primary reflector 101, is reflected again by the primary reflector 101, returns to the secondary reflector 103, and finally exits from the observation port 105 after reflection by the secondary reflector 103, returning to the light source generating device 201. To make the optical axis of the collimator coincide with its central axis, it is only necessary to make the incident light generated by the light source generating device 201 and the reflected light returning from the secondary reflector 103 coincide. Therefore, during calibration, the angles of the primary reflector 101 and / or the secondary reflector 103 need to be adjusted until the incident light generated by the light source generating device 201 and the reflected light returning from the secondary reflector 103 coincide, thus completing the calibration.

[0022] like Figure 3 and Figure 4 As shown, the light source generating device of this embodiment includes a housing, a light source 301, and a mounting base 303. The light source 301 is fixed inside the housing by the mounting base 303. The mounting base has an observation surface 305, through which the laser beam emitted by the light source can pass through the hole structure 306 on the observation surface 305 and coincide with the axis of the housing. An opening 307 is provided on the side of the housing, through which the observation surface 305 can be seen, and thus the reflected light returning from the secondary reflector 103 to the light source generating device can be obtained based on the observation surface 305.

[0023] For example, if additional light spots are formed on the observation surface 305, it indicates that the reflected light returning from the reflector 103 to the light source generating device does not coincide with the incident light generated by the light source generating device 201. In this case, the angles of the primary reflector 101 and / or the secondary reflector 103 need to be adjusted for optical axis calibration. Conversely, if no additional light spots are formed on the observation surface 305, and the reflected light returning from the reflector 103 to the light source generating device passes through the aperture structure 306 on the observation surface 305, it indicates that the reflected light returning from the reflector 103 to the light source generating device coincides with the incident light generated by the light source generating device 201, and optical axis calibration is not required.

[0024] Furthermore, the housing of the light source generating device includes a first housing and a second housing 309. The first housing has a first segment 311 and a second segment 313 connected to the first segment 311. The inner diameters of both the second segment 313 and the second housing 309 are smaller than those of the first segment 311. The second segment 313 is used to connect the second housing 309, thereby connecting the second housing 309 to the first housing. A fixing base 303 fixes the light source 301 inside the second housing 309, and an opening 307 is provided on the side wall of the second housing 309.

[0025] Furthermore, such as Figure 4 As shown, on the observation surface 305, multiple concentric rings 401 are set around the aperture structure 306 to evaluate the degree of optical axis offset of the collimator.

[0026] This invention incorporates a light source generating device at the observation port of a collimator. Incident light generated by this device enters the collimator through the observation port. Based on the principle that the reflected light from the light source generating device should coincide with the incident light when the optical axis is in the correct position, the optical axis of the collimator is calibrated. Optical axis adjustment can be achieved simply by installing the light source generating device, which is simple in structure, compact, and portable. This makes the optical axis calibration system independent of laboratory settings, easy to operate, and flexible in use. Furthermore, it effectively reduces the impact of assembly precision and operating methods on calibration accuracy, exhibits strong anti-interference capabilities, and has minimal influence from temperature and external stray light. Depending on the focal length, the calibration accuracy can be maintained at approximately 1mm.

[0027] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0028] Furthermore, 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 at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more (two or more) executable instructions for implementing a particular logical function or process. Furthermore, the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functionality involved.

[0030] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A collimator optical axis calibration system, characterized in that, It includes a collimator and a light source generating device; the collimator includes a primary reflector and a secondary reflector, the centers of which are located on the central axis of the collimator; an observation port is provided on the side wall of the collimator; The light source generating device can generate a beam of incident light perpendicular to the central axis of the collimator. This beam of incident light reaches the center of the secondary reflector from the observation port, is reflected by the secondary reflector, reaches the primary reflector, is reflected again by the primary reflector, returns to the secondary reflector, and finally returns to the light source generating device from the observation port after being reflected by the secondary reflector. By adjusting the angles of the primary reflector and / or the secondary reflector, the incident light generated by the light source generating device and the reflected light returning from the secondary reflector are made to coincide, thus completing the calibration.

2. The optical axis calibration system for a collimator as described in claim 1, characterized in that, The light source generating device includes a housing, a light source, and a mounting base; the mounting base fixes the light source inside the housing, and the laser beam emitted by the light source coincides with the axis of the housing.

3. The optical axis calibration system for a collimator as described in claim 2, characterized in that, The mounting base has an observation surface with a hole structure, through which the laser beam emitted by the light source can pass.

4. The optical axis calibration system for a collimator as described in claim 3, characterized in that, The side of the housing has an opening through which the observation surface can be seen, and the reflected light returning from the secondary reflector to the light source generating device can be obtained based on the observation surface.

5. The optical axis calibration system for a collimator as described in claim 4, characterized in that, When additional light spots are formed on the observation surface, the angles of the primary reflector and / or the secondary reflector are adjusted to perform optical axis calibration.

6. The optical axis calibration system for a collimator as described in claim 4, characterized in that, When no additional light spots are formed on the observation surface, optical axis calibration is not required.

7. The optical axis calibration system for a collimator as described in claim 4, characterized in that, On the observation surface, multiple concentric rings are arranged around the aperture structure to evaluate the degree of optical axis offset of the collimator.

8. The optical axis calibration system for a collimator as described in claim 4, characterized in that, The housing includes a first housing and a second housing; the first housing has a first segment and a second segment connected to the first segment, and the inner diameter of the second segment and the second housing is smaller than that of the first segment; the second segment is used to connect the second housing, thereby connecting the second housing to the first housing.

9. The optical axis calibration system for a collimator as described in claim 8, characterized in that, The mounting bracket secures the light source within the second housing.

10. The optical axis calibration system for a collimator as described in claim 8, characterized in that, The opening is located on the side wall of the second housing.

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