A digital autocollimation detection system and method for a single or multiple optical path optical system conjugate position

Abstract

The application provides a self-collimation detection system and method for conjugate positions of a digital single-optical-path or multi-optical-path optical system, which comprises a light source, a scale plate, an imaging receiving device and a display, a beam splitter, a collimating objective assembly, a mirror, a displacement detection device and a focusing mechanism, and the detection system composed of the basic components can accurately measure the conjugate positions of the single-optical-path or multi-optical-path optical system. In specific embodiments, the optical path layout of the optical system is flexibly set according to different applications, the basic principle is unchanged, the system has strong versatility, and is suitable for high-precision batch detection of the conjugate positions of the optical system.

Description

Technical Field

[0001] This invention belongs to the field of optical system detection technology, and particularly relates to a digital autocollimation detection system and method for the conjugate position of a single-path, single-path, or multi-path optical system. Background Technology

[0002] Optical systems can be classified into infinity-range optical systems and finite-range optical systems according to their conjugate distance, and into afocal and focal optical systems according to whether they have a focal point. For focal optical systems with finite or infinity-range conjugate distance, or for a portion of an optical system that is a focal system with finite or infinity-range conjugate distance, the distance from the conjugate position to the mounting surface is an important indicator. It relates to whether the object and image positions of the preceding and following optical systems are accurately aligned, and ultimately to whether the imaging relationship of the entire optical system meets the design requirements. Currently, there is no conventional high-precision testing method; it can only be inspected by assembling the entire optical system, which cannot detect conjugate position deviations in the optical system in a timely manner. Summary of the Invention

[0003] To address the aforementioned issues, this invention discloses a digital autocollimation detection system and method for the conjugate position of single-optical-path or multi-optical-path optical systems. This system is highly versatile, allowing for the creation of matching interfaces and applicable implementations based on different types of optical systems. It can detect the conjugate position of single-optical-path to single-optical-path or multi-optical-path optical systems, offering diverse implementations, wide applicability, good detection repeatability, and improved accuracy as the accuracy of related components increases.

[0004] The technical concept of this invention is as follows: A reflector is placed at the conjugate theoretical position of the optical system under test. An autocollimation assembly and a collimating objective lens assembly are placed on one side of the optical system under test to provide a target at a finite or infinite distance into the optical system under test. If the conjugate position of the optical system under test coincides with the reflector, the light enters the optical system under test, converges on the reflector after passing through the optical system under test, is reflected by the reflector, collimated by the optical system under test, and is received by the collimating objective lens assembly. The light finally converges on the target surface of the imaging receiver of the autocollimation assembly, and a clear reticle image is displayed on the screen. If the position of the conjugate image of the optical system deviates from the reflector surface, a blurry reticle image appears on the display screen of the autocollimation assembly. By adjusting the position of the adjustable focus component in the detection system, the reticle image on the display screen can be made clear. During this adjustment process, a displacement detection device is set to detect the displacement change of the adjustable focus component. Finally, the distance from the position without deviation can be obtained to obtain the accurate conjugate position deviation value.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a basic component for a digital single-path or multi-path optical system's autocollimation detection system for the conjugate position, comprising an autocollimation assembly, a collimating objective lens assembly, a displacement detection device, a mirror, and a focusing mechanism; wherein...

[0007] The autocollimation component includes:

[0008] Beam splitter;

[0009] A reticle is located on one side of the beam splitter;

[0010] The light source is located on one side of the reticle;

[0011] An imaging receiving device, electrically connected to a display, is disposed on one side of the beam splitter, with its target surface and the reticle surface symmetrical with respect to the beam splitter surface of the beam splitter.

[0012] Collimating objective lens assembly:

[0013] It is positioned between the optical system under test and the beam splitter, aligning the collimating objective lens assembly, the optical system under test, the beam splitter, the imaging receiver, and the optical axis of the reticle.

[0014] A reflector, the reflective surface of which is located at the conjugate position of a target at a finite or infinite distance in the optical system under test;

[0015] The focusing mechanism is connected to the adjustable focusing component and is used in conjunction with a displacement detection device to detect the displacement changes of the adjustable focusing component in real time.

[0016] In a preferred embodiment of the present invention, the reticle surface and the target surface of the imaging receiver are located at the focal plane of the collimating objective lens assembly.

[0017] In a preferred embodiment of the present invention, the collimating objective lens assembly provides a target at a finite or infinite distance for the optical system under test.

[0018] In a preferred embodiment of the present invention, any one of the collimating objective lens assembly, the optical system under test, the mirror, or the autocollimating assembly can be used as an adjustable focusing component and connected to the focusing mechanism.

[0019] In a preferred embodiment of the present invention, the display shows the image of the reticle formed by the optical system under test, and the image of the reticle on the display is clearest when the reflective surface of the mirror is located at the conjugate position of the target at a finite or infinite distance of the optical system under test.

[0020] Secondly, the present invention provides a method for detecting the conjugate position of a digital single-path or multi-path optical system using a self-collimation detection system, characterized by comprising the following steps:

[0021] Step S: Establish a benchmark testing system

[0022] A reference cylinder is designed based on the characteristics of the optical system under test. The reflective surface of the mirror is set at the theoretical conjugate position of the optical system under test. The optical system under test is calibrated using a standard autocollimator and used as a reference detection system.

[0023] Step S: Calibrate the testing system

[0024] Install the reference detection system onto the detection system, and use the focusing mechanism to system focus the adjustable component until a clear reticle image appears on the display screen. Then, return the displacement detection device to zero and remove the reference detection system.

[0025] Step S: Detect conjugate position deviation

[0026] The optical system under test is installed on the detection system, and the adjustable focus component is systematically focused through the focusing mechanism until a clear reticle image appears on the display screen. At this time, the reading of the displacement detection device is the conjugate position deviation from the standard value.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] The accuracy of the detection system is related to the focusing accuracy of the focusing mechanism and the detection accuracy of the displacement detection device. The higher the focusing accuracy of the focusing mechanism and the higher the detection accuracy of the displacement detection device, the higher the accuracy of the detection system.

[0029] This invention combines a reticle, beam splitter, collimating objective lens, imaging receiver, mirror, displacement detection device, light source, and focusing mechanism. Based on the characteristics of the optical system under test, one of the relevant components in the detection system is positioned adjustable. By detecting the displacement change of this adjustable component and comparing the deviation of the conjugate position of the optical system under test relative to the conjugate position of a calibrated optical system, accurate measurement of the conjugate position of single-path or multi-path optical systems can be achieved. The measurement accuracy can be gradually improved based on the quality of key components, making it highly versatile and suitable for high-precision batch testing of the conjugate position of optical systems. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of Embodiment 1 of the present invention;

[0031] Figure 2 This is a schematic diagram of Embodiment 2 of the present invention;

[0032] Figure 3 This is a schematic diagram of the reference cylinder 2 of the present invention;

[0033] Figure 4 This is a schematic diagram of the parfocal mirror of the present invention;

[0034] Figure 5 This is a schematic diagram of the parfocal host of the present invention;

[0035] Figure 6 This is a schematic diagram of the overall structure of the detection system of the present invention.

[0036] In the picture:

[0037] 1-Focusing main unit; 2-Reference tube 2; 301-Collimating objective lens 1; 302-Collimating objective lens 2; 4-Dial indicator; 5-Focusing mechanism; 51-Focusing handwheel; 52-Focusing bracket; 6-Light source; 7-Reticle; 8-Beam splitter; 9-Reflector; 10-Display; 11-CCD; 13-Autocollimator. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the present application.

[0040] See attached document Figure 1-6 As shown, this invention provides a digital self-collimation detection system for the conjugate position of a single-path or multi-path optical system, comprising a self-collimation assembly, a collimation objective lens assembly, a CCD, a mirror, and a focusing mechanism; wherein,

[0041] The autocollimation component includes:

[0042] Beam splitter 8;

[0043] The reticle 7 is disposed on one side of the beam splitter 8;

[0044] Light source 6 is located on one side of the reticle;

[0045] CCD11, which is electrically connected to the display 10, is located on one side of the beam splitter 8, and its target surface 11a and the reticle surface 7a are symmetrical with respect to the reticle surface 8a of the beam splitter 8.

[0046] Collimating objective lens assembly: includes at least one collimating objective lens, generally divided into collimating objective lens one 301 and collimating objective lens two 302. In the example, one or two collimating objective lenses are selected. It is located between the optical system under test and the beam splitter 8. The collimating objective lens assembly, the optical system under test, the beam splitter, the imaging receiver and the reticle optical axis are aligned.

[0047] The reflector 9, whose reflective surface 9a is located at the conjugate position of the target at a finite or infinite distance in the optical system under test;

[0048] The focusing mechanism 5 is connected to the adjustable focusing component and works in conjunction with the CCD4 to detect the displacement changes of the adjustable focusing component in real time.

[0049] As an example, the reticle's reticle surface and the CCD's target surface are located at the focal plane of the collimating objective lens assembly.

[0050] It should be noted that the collimating objective lens assembly provides a target at a finite or infinite distance for the optical system under test.

[0051] As a further optimization of the present invention, any one of the collimating objective lens assembly, the optical system under test, the mirror, and the autocollimating assembly can be connected to the focusing mechanism as an adjustable focusing component.

[0052] Specifically, the display shows the image of the reticle formed by the optical system under test. The image of the reticle on the display is clearest when the reflective surface of the mirror is located at the conjugate position of the target at a finite or infinite distance from the optical system under test.

[0053] Based on the above detection system, the present invention provides a detection method for a digital self-collimation detection system of the conjugate position of a single-optical-path or multi-optical-path optical system, characterized by comprising the following steps:

[0054] Step S: Establish a benchmark testing system

[0055] A special mirror tube is designed based on the characteristics of the optical system under test. The reflective surface of the mirror is set at the theoretical conjugate position of the optical system under test. The optical system under test is calibrated using a standard autocollimator and used as a reference testing system.

[0056] Step S: Calibrate the testing system

[0057] Install the reference detection system onto the detection system, and use the focusing mechanism to system focus the adjustable component until a clear reticle image appears on the display screen. Then, return the displacement detection device to zero and remove the reference detection system.

[0058] Step S: Detect conjugate position deviation

[0059] The optical system under test is installed on the detection system, and the adjustable focus component is systematically focused through the focusing mechanism until a clear reticle image appears on the display screen. At this time, the reading of the displacement detection device is the conjugate position deviation from the standard value.

[0060] The specific structural relationships of the above structures are as follows:

[0061] The reticle 7a and the target surface 11a of the CCD 11 are symmetrical with respect to the beam-splitting surface 8a of the beam splitter 8. The light source 6 illuminates the reticle 7 from one side. The CCD is wired to the display 10. The collimating objective is aligned with the beam splitter. The reticle and the target surface of the CCD are located at the focal plane of the collimating objective. Whether or not a second collimating objective is provided depends on the conjugate distance of the optical system under test. If the conjugate distance of the optical system under test is limited, the second collimating objective is placed on one side of the first collimating objective, and their optical axes are aligned. The optical system under test is located at... The collimating objective lens 2 is positioned on one side and aligned with its optical axis. The back focal plane of the collimating objective lens 2 coincides with the object-side or image-side conjugate position of the optical system under test. The reflecting surface of the mirror is located at the image-side or object-side conjugate position of the optical system under test. If the conjugate distance of the optical system under test is infinitely far, but the conjugate position is finite, then the collimating objective lens 2 is not used. The optical system under test is located on one side of the collimating objective lens 1, and their optical axes are aligned. The infinity object-side or infinity image-side of the optical system under test faces the collimating objective lens 1, and the reflecting surface of the mirror is located at the finite-distance conjugate position of the optical system under test. One of the collimating objective lens 1, collimating objective lens 2, the optical system under test, and the mirror can be position-adjustable. The focusing mechanism 5 is an adjustable component including a focusing handwheel 51 and a focusing bracket 52. The dial indicator 4 detects the displacement changes of the focusing mechanism in real time, thereby detecting the displacement changes of the adjustable component in real time.

[0062] The detection principle of the above detection system is mainly as follows:

[0063] The light source 6 is powered on and illuminates the reticle 7. Diverging light rays emerge from the reticle surface 7a of the reticle 7. After reflection from the beam-splitting surface 8a of the beam splitter 8, the light rays are collimated by the collimating objective lens 301 and emerge as parallel light. If the collimating objective lens 302 is provided, the parallel light rays entering the collimating objective lens 302 will converge at the object-side conjugate position or image-side conjugate position of the optical system under test. After receiving the light rays, the optical system under test will converge them onto the reflective surface of the mirror 9 placed at the object-side conjugate position or image-side conjugate position of the optical system under test. After reflection from the reflective surface 9a, the light rays enter the optical system under test and converge at the back focal plane of the collimating objective lens 302 before entering the collimation. Objective lens 2 302: After light passes through collimating objective lens 2 302, it is emitted as parallel light. The parallel light enters collimating objective lens 1 301 and is then focused onto the target surface 11a of CCD 11 by beam splitter 8, where the image of reticle 7 is seen on display 10. If collimating objective lens 2 302 is not provided, the parallel light emitted from collimating objective lens 1 301 enters the optical system under test. The light is collimated and focused by the optical system under test onto the reflective surface of mirror 9. After reflection from the reflective surface and collimation by the optical system under test, it is emitted as parallel light. The parallel light enters collimating objective lens 1 301 and is then focused onto the target surface of CCD 11 by beam splitter 8, where the image of reticle 7 is seen on display 10.

[0064] Based on the above-described detection system and method, the present invention can be preferably implemented in the following four ways:

[0065] Example 1

[0066] Reference Figure 1 As shown, the optical system under test is used as an adjustable focusing component, and a collimating objective lens is installed. The detection method for the optical system under test corresponding to an infinity target in this example is as follows:

[0067] The detection system is matched with the mounting surface of the optical system under test. The distance between the reflective surface 21 of the parfocal mirror and the mounting surface 18 is the nominal value of the conjugate image plane of the infinitely distant target of the optical system under test to the mounting surface, which is accurately measured.

[0068] Example 1 Detection method:

[0069] Step 1: According to the aforementioned setup, the reference tube 2, which contains the parfocal mirror and the optical system under test, is aligned with the system using a standard autocollimating front mirror. The optical path principle is as follows: a beam of light emitted from the reticle of the autocollimating front mirror is reflected by the beam splitter and collimated by the objective lens of the front mirror before exiting as parallel light into the system under test. After being collimated by the system under test, the light is projected onto the reflector surface 21. After being reflected by the reflector surface, collimated by the system under test, and collimated by the objective lens of the front mirror, the light enters the eyepiece or imaging receiver. If the image of the reticle observed through the eyepiece or on the display is not clear, the position of the lens in the system under test along the axis is adjusted until it is clearest. Then, the position of this lens is fixed with adhesive as a reference testing system.

[0070] Step 2: Install the reference detection system into the detection system. The optical path principle is as follows: the light source 6 illuminates the reticle 7. A beam of light emitted from the reticle 7 is reflected by the beam splitter surface 8a of the beam splitter 8 and collimated by the collimating objective lens 301 before entering the reference detection system. After collimation by the reference detection system, the light is projected onto the reflector 9. After reflection by the reflector surface 9a of the reflector 9, collimation by the reference detection system, and collimation by the collimating objective lens 301, the light enters the CCD 11. If the image of the reticle 7 seen on the display 10 is not clear, the focusing mechanism 5 controls the reference detection system to focus until the image of the reticle 7 is clearest. At this time, the dial indicator 4 is zeroed and the reference detection system is removed.

[0071] refer to Figure 3 , 4The reference cylinder 2 and the reflector 9 are configured. The reference cylinder 2 includes an imaging component 14 of the optical system under test, a dovetail interface 15, and a main cylinder 16. The imaging component 14 of the optical system under test is threaded into the main cylinder 16, and the dovetail interface 15 is fixed to the main cylinder 16 with screws. The distance between the reflector surface 21 and the connecting positioning surface of the parfocal reflector 9 is the standard value of the conjugate distance of the optical system under test. The connecting positioning surface 18 contacts the end face 17 of the main cylinder, and a rectangular groove 19 and a rubber ring 20 are provided at the contact point of the end face 17 to increase the tightness of the contact. The key to setting up this reference cylinder 2 is to adjust the focal plane of the imaging component of the optical system under test and the reflective surface a of the reflector 9 to coincide. Use this reference cylinder 2 as a reference. During testing, install the reference cylinder 2 on the parfocal host 1, insert the parfocal mirror 9 into the reference cylinder 2, and adjust the image on the display 10 to the clearest level using the focusing mechanism 5. The focusing mechanism 5 includes a focusing handwheel 51 and an adjusting bracket 52. The focusing handwheel 51 on the focusing bracket 52 controls the up and down movement of the reference detection system until a clear image of the reticle 7 appears on the display. At this time, zero the dial indicator 4, remove the reference cylinder 2, install the optical system under test on the parfocal host 1, adjust the image on the display 10 to the clearest level using the focusing mechanism 5, and then check the reading on the dial indicator 4. This reading is the deviation from the theoretical value.

[0072] Example 2

[0073] Reference Figure 2 As shown, the optical system under test is used as an adjustable focusing component, and two collimating objectives are set up. The setup and testing method for the system under test corresponding to a finite-distance target are as follows:

[0074] Example 2 Setup: The collimating objective lens 301 is fixed relative to the beam splitter 8 along the optical axis, and the reticle 7a of the reticle 7 and the target surface 11a of the imaging receiver 11 are located on the focal plane of the collimating objective lens 301, i.e., parallel light is emitted from the collimating objective lens 301. The optical system under test is located on one side of the collimating objective lens 301 and aligned with the optical axis of the collimating objective lens 301. The collimating objective lens 302 is located between the collimating objective lens 301 and the optical system under test, and the back focal plane of the collimating objective lens 302 coincides with the object-side or image-side target of the optical system under test. The focusing mechanism 5 is connected to the optical system under test. The dial indicator 4 detects the displacement change of the focusing mechanism 5 or its extension mechanism, and thus detects the displacement change of the optical system under test. The reflector 9 is fixed near the focal plane of the optical system under test and is separate from the optical system under test.

[0075] Example 2 Detection Method:

[0076] Step 1: Following the setup of Example 2, the reference tube sets a finite distance target interface based on the theoretical value of the optical system under test. The collimating objective lens 2 302 is installed on this interface, so that the focal plane of the collimating objective lens 2 302 coincides with the theoretical finite distance target of the optical system under test. A reflector is placed at the conjugate position of the theoretical finite distance target of the optical system under test. This assembly is then calibrated by adjusting the axial position of the lenses in the optical system under test under a standard autocollimating front lens until the image is clearest. After that, the position of this lens is fixed with adhesive as a reference testing system.

[0077] Step 2: Following the setup in Example 2, install the reference detection system with collimating objective lens 2 302 into the detection system. (See schematic diagram below.) Figure 2 The optical path principle is as follows: the light source 6 illuminates the reticle 7, and a beam of light emitted from the reticle 7 is reflected by the beam splitter 8 and collimated by the collimating objective lens 301 before entering the reference detection system. After collimation by the collimating objective lens 302 in the reference detection system, the light converges onto the reflector 9 after passing through the calibrated optical system. The light then enters the CCD 11 after reflection by the reflective surface 9a of the reflector 9, collimation by the reference detection system, and collimation by the collimating objective lens 301. If the image of the reticle 7 seen on the display 10 is not clear, the focusing mechanism 5 controls the reference detection system to focus until the image of the reticle 7 is clearest. At this time, the displacement detection device 4 is zeroed and the reference detection system is removed.

[0078] Step 3: Install the optical system under test and the calibrated collimating objective lens 302 into the testing system. The optical path principle is the same as in Step 2. If the image of the reticle 7 seen on the display 10 is not clear, the focusing mechanism 5 controls the focusing of the optical system under test until the image of the reticle 7 is clearest. At this time, read the reading of the dial gauge 4, which is the deviation between the position of the conjugate image of the finite distance target of the optical system under test and the nominal position.

[0079] Example 3

[0080] The method for setting up and testing the reflector as an adjustable component is as follows:

[0081] Example 3 setup: Unlike Example 1, the focusing mechanism 5 is connected to the reflector 9, and the dial gauge 4 detects the displacement change of the focusing mechanism 5 or its extension mechanism, thereby detecting the displacement change of the reflector 9.

[0082] Example 3 Detection Method:

[0083] Step 1: Same as Example 1;

[0084] Step 2: Following the setup in Embodiment 3, install the reference detection system in the detection system. The optical path principle is as follows: the light source 6 illuminates the reticle 7. A beam of light emitted from the reticle 7 is reflected by the beam splitter 8 and collimated by the collimating objective lens 301 before entering the reference detection system. After collimation by the reference detection system, the light converges onto the reflector 9. The light then passes through the reflective surface 9a of the reflector 9, the collimation of the reference detection system, and the collimation of the collimating objective lens 301 before entering the CCD 11. If the image of the reticle 7 seen on the display 10 is not clear, the focusing mechanism 5 controls the focusing of the reflector 9 until the image of the reticle 7 is clearest. At this point, the dial indicator 4 is zeroed, and the reference detection system is removed.

[0085] Step 3: Install the optical system under test into the detection system. The optical path principle is the same as in Step 2. If the image of the reticle 7 seen in the display 10 is not clear, the focusing mechanism 5 controls the mirror 9 to focus until the image of the reticle 7 is clearest. At this time, read the reading of the dial gauge 4, which is the deviation between the position of the conjugate image of the target at infinity and the nominal position of the optical system under test.

[0086] Example 4

[0087] The setup and testing method for the autocollimation component as an adjustable component is as follows:

[0088] Example 4 setup: The light source 6, reticle 7, beam splitter 8, and CCD 11 constitute an autocollimation assembly. The collimating objective 301 is aligned with the beam splitter 8, and the reticle surface 7a of the reticle 7 and the target surface 11a of the CCD 11 are located near the focal plane of the collimating objective 301. The focusing mechanism 5 is connected to the autocollimation assembly. The dial indicator 4 detects the displacement change of the focusing mechanism 5 or its extension mechanism, and thus detects the displacement change of the autocollimation assembly. The optical system under test is located on one side of the collimating objective 301 and aligned with the optical axis of the collimating objective 301. Both have the same focal length, forming an optical magnification of 1. The reflector 9 is fixed at the nominal conjugate position of the optical system under test through the reference tube 2. That is, the displacement change of the autocollimation assembly detected by the dial indicator 4 is equivalent to the displacement change at the same conjugate position of the optical system under test.

[0089] Example 4 Detection Method:

[0090] Step 1: Following the setup in Embodiment 4, the reference cylinder 2 equipped with the reflector 9 is installed on the mounting surface of an optical system under test. A standard autocollimating front mirror is used to align the optical system under test. The optical path principle is that a beam of light emitted from the reticle of the autocollimating front mirror is reflected by the beam splitter and collimated by the objective lens of the front mirror before exiting as parallel light into the optical system under test. After collimation by the optical system under test, the light converges onto the reflector. After reflection by the reflective surface, collimation by the optical system under test, and collimation by the objective lens of the front mirror, the light enters the eyepiece or imaging receiver. If the image of the reticle observed through the eyepiece or on the display is not clear, the position of the lens in the optical system under test along the axis is adjusted until it is clearest. Then, the position of this lens is fixed with adhesive as a reference testing system.

[0091] Step 2: Following the setup of Embodiment 4, the reference detection system is installed in the detection system. The optical path principle is as follows: the light source 6 illuminates the reticle 7. A beam of light emitted from the reticle 7 is reflected by the beam splitter 8 and collimated by the collimating objective lens 301 before entering the reference detection system. After collimation by the reference detection system, the light converges onto the reflector 9. The light then is reflected by the reflective surface 9a of the reflector 9, collimated by the reference detection system, and collimated by the collimating objective lens 301 before entering the imaging receiver 11. If the image of the reticle 7 seen on the display 10 is not clear, the autocollimation combination is controlled by the focusing mechanism 5 to focus until the image of the reticle 7 is clearest. At this point, the displacement detection device 4 is zeroed, and the reference detection system is removed.

[0092] Step 3: Install the optical system under test into the detection system. The optical path principle is the same as in Step 2. If the image of the reticle 7 seen in the display 10 is not clear, the autocollimation combination is controlled by the focusing mechanism 5 until the image of the reticle 7 is clearest. At this time, the reading of the displacement detection device 4 is read, which is the deviation between the position of the conjugate image of the target at infinity and the nominal position of the optical system under test.

[0093] The detection system includes the collimating objective lens 302. The basic setup method is as described in claim 1. The autocollimation assembly, collimating objective lens 301, collimating objective lens 302, optical system under test, and mirror 9 can be selected as adjustable components according to the characteristics of the optical system under test. The focusing mechanism 5 is connected to the adjustable component. The displacement detection device 4 detects the displacement change of the focusing mechanism 5 or its extension mechanism, and then detects the displacement change of the adjustable component. The detection method is the same as when there is no collimating objective lens 302.

[0094] Although embodiments of the invention have been shown and described, it is obvious that many modifications and variations can be made based on the content of this specification. These embodiments have been selected and specifically described in this specification to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to well understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A self-collimating detection system for the conjugate position of a digital single-path or multi-path optical system, characterized in that: The detection system includes an autocollimation assembly, a collimating objective lens assembly, a displacement detection device, a mirror, and a focusing mechanism; among which... The autocollimation component includes: Beam splitter; A reticle is located on one side of the beam splitter; The light source is located on one side of the reticle; An imaging receiving device, electrically connected to a display, is disposed on one side of the beam splitter, with its target surface and the reticle surface symmetrical with respect to the beam splitter surface of the beam splitter. Collimating objective lens assembly: It is positioned between the optical system under test and the beam splitter, aligning the collimating objective lens assembly, the optical system under test, the beam splitter, the imaging receiver, and the optical axis of the reticle. A reflector, the reflective surface of which is located at the conjugate position of a target at a finite or infinite distance in the optical system under test; The focusing mechanism is connected to the adjustable focusing component and is used in conjunction with the displacement detection device to detect the displacement changes of the adjustable focusing component in real time. The reticle's reticle surface and the imaging receiver's target surface are located at the focal plane of the collimating objective lens assembly. The collimating objective lens assembly, the optical system under test, the mirror, and the autocollimating assembly are all configured as adjustable focusing components and connected to the focusing mechanism.

2. The self-collimating detection system for the conjugate position of a digital single-optical-path or multi-optical-path system according to claim 1, characterized in that: The collimating objective lens assembly provides a target at a finite or infinite distance for the optical system under test.

3. The self-collimating detection system for the conjugate position of a digital single-path or multi-path optical system according to claim 2, characterized in that: The display shows the image of the reticle formed by the optical system under test. The image of the reticle on the display is clearest when the reflective surface of the mirror is located at the conjugate position of the target at a finite or infinite distance of the optical system under test.

4. A detection method for the self-collimation detection system of the conjugate position of a digital single-path or multi-path optical system as described in claim 1, characterized in that, Includes the following steps: Step S: Establish a benchmark testing system A reference cylinder is designed based on the characteristics of the optical system under test. The reflective surface of the mirror is set at the theoretical conjugate position of the optical system under test. The optical system under test is calibrated using a standard autocollimator and used as a reference testing system. Step S: Calibrate the testing system Install the reference detection system onto the detection system, and use the focusing mechanism to system focus the adjustable component until a clear reticle image appears on the display screen. Then, return the displacement detection device to zero and remove the reference detection system. Step S: Detect conjugate position deviation The optical system under test is installed on the detection system, and the adjustable focus component is systematically focused through the focusing mechanism until a clear reticle image appears on the display screen. At this time, the reading of the displacement detection device is the conjugate position deviation from the standard value.

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