Reference processing correction method for improving coupling coaxial precision of detector assembly

Abstract

The invention discloses a reference processing correction method for improving the coupling coaxial precision of a detector assembly, and solves the problem that the parallel precision of each surface on an image intensifier and the planeness of a central reference lead-out tool of the image intensifier are difficult to guarantee in the existing correction processing method of the image intensifier. The theodolite and the autocollimator are arranged on the left side and the right side of the high-precision centering lathe respectively and used for machining and correcting the anode flange end face of the image intensifier, the cathode flange end face of the image intensifier and the image intensifier center datum leading-out tool respectively, and a unique datum exists in machining and correction. Therefore, the parallel precision of each surface on the image intensifier and the planeness of the central reference leading-out tool of the image intensifier are greatly improved, and the coupling coaxial precision of the detector assembly can be further improved.

Description

Technical Field

[0001] The invention relates to a detector assembly, and in particular to a reference processing correction method for improving the coupling coaxial accuracy of the detector assembly. Background Art

[0002] The coupled coaxiality of the detector assembly is suitable for imaging of multi-line array low-light detector assemblies in the aerospace field. The coupled coaxiality of the detector assembly is to achieve the coupled coaxiality of the detector and the image intensifier through a combination of special instruments and equipment. Figure 1 and Figure 2 As shown, the image intensifier mainly includes a flange, an anode 01 and a cathode 03 (photocathode), wherein the flange has an anode flange end face 02 and a cathode flange end face 04. When coupling the image intensifier with the detector, it is easy to cause the center reference offset, so it is often necessary to use a conventional image intensifier correction processing method to process and correct it to improve the coupling coaxial accuracy of the space optical camera detector assembly. At present, the conventional image intensifier processing and correction method has the following problems: the image point positions on the front and rear surfaces of the image intensifier cathode are difficult to distinguish, and they mostly rely on the operating experience of the centering personnel, which easily causes the parallel accuracy of the flange end face and the anode surface after the centering process to be insufficient; using the image intensifier anode reflection image as the reference, two autocollimators are used to calibrate the reference lead-out tooling, which makes it difficult to achieve the preset processing accuracy. Summary of the invention

[0003] In order to solve the technical problem that it is difficult to ensure the parallelism and flatness of each surface of the image intensifier and the image intensifier center reference lead-out tooling in the existing image intensifier correction processing method, which makes it difficult to improve the coupling coaxial accuracy of the detector assembly, the present invention provides a reference processing correction method for improving the coupling coaxial accuracy of the detector assembly.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] A reference processing correction method for improving the coupling coaxial accuracy of a detector assembly is characterized in that it comprises the following steps:

[0006] Step 1, placing the theodolite and the autocollimator on the left and right sides of the high-precision centering lathe respectively, and making the theodolite and the autocollimator coaxially coincide at infinity; the high-precision centering lathe is provided with a spindle box, a four-dimensional adjustment bracket and a four-dimensional adjustment bracket transfer tooling connected in sequence;

[0007] Step 2, connect and tighten the image intensifier center reference lead-out fixture and the four-dimensional adjustment bracket adapter fixture;

[0008] Step 3, connect and tighten the image intensifier whose anode and cathode are parallel to each other to the image intensifier center reference lead-out tooling, so that the anode of the image intensifier faces the autocollimator, and use the reflected image of the anode of the image intensifier in the autocollimator as the correction reference, and use a high-precision centering lathe to process and correct the anode flange end face of the image intensifier so that the anode and the anode flange end faces are parallel to each other;

[0009] Step 4: Reconnect and tighten the image intensifier to the image intensifier center reference lead-out fixture, so that the cathode of the image intensifier faces the autocollimator. Using the reflected image of the cathode of the image intensifier in the autocollimator as the correction reference, use a high-precision centering lathe to process and correct the cathode flange end face of the image intensifier so that the anode and cathode flange end faces are parallel to each other.

[0010] Step 5, respectively detect the flatness of the anode flange end face, the flatness of the cathode flange end face, the parallelism between the anode and the anode flange end faces, and the parallelism between the anode and the cathode flange end faces of the image intensifier. If all four meet the requirements, the processing and correction of the image intensifier is completed. Otherwise, return to step 3 until all four meet the requirements.

[0011] Step 6: Connect and tighten the image intensifier to the image intensifier center reference lead-out fixture, so that the anode of the image intensifier faces the theodolite, and use a high-precision centering lathe to process and calibrate the surface of the image intensifier center reference lead-out fixture facing the autocollimator, taking the theodolite autocollimation image reflected by the anode as a reference, so that it is parallel to the anode;

[0012] Step 7: Check the surface flatness of the image intensifier center reference lead-out fixture toward the autocollimator and the parallelism of the surface with the anode. If both meet the requirements, the reference processing correction for improving the coaxial accuracy of the detector assembly coupling is completed. Otherwise, return to step 6 until both meet the requirements.

[0013] Furthermore, step 4 specifically includes:

[0014] 4.1. Reconnect the image intensifier to the image intensifier center reference lead-out fixture and tighten it, so that the cathode of the image intensifier faces the autocollimator;

[0015] 4.2. Paste a reflective film on the front surface of the cathode of the image intensifier, and judge the reflected image of the cathode on the rear surface in the autocollimator by the reflected image of the reflective film in the autocollimator;

[0016] 4.3. Adjust the reflection image jitter of the reflection film in the autocollimator to the minimum through the four-dimensional adjustment bracket adapter tooling;

[0017] 4.4. Using the rear surface reflection image in the autocollimator as the calibration reference, control the turning feed amount, and use a high-precision centering lathe to process and calibrate the cathode flange end face of the image intensifier so that the anode and cathode flange end faces are parallel to each other.

[0018] Furthermore, step 4.2 specifically includes:

[0019] 4.2.1. Adjust the autocollimator to infinity. Through the eyepiece on the autocollimator, it can be observed that the cathode of the image intensifier has two bright cross reflection images and one reference cross image. The two bright cross reflection images are the front surface reflection image and the rear surface reflection image of the cathode respectively. The reference cross image is the reflection image of the built-in graticule of the autocollimator. The front surface reflection image is the surface reflection image of the cathode away from the anode.

[0020] 4.2.2. If a reflective film is pasted on the front surface of the cathode of the image intensifier, three bright cross reflection images and one reference cross image can be observed in the eyepiece, of which the extra bright cross reflection image is the reflection image of the reflective film;

[0021] 4.2.3. Adjust the hand wheel of the eyepiece so that the extra bright cross reflection image is infinitely close to one of the other two bright cross reflection images. The other of the other two bright cross reflection images is the rear surface reflection image of the cathode.

[0022] Furthermore, in step 4.2.2:

[0023] The reflective film is an LED liquid crystal reflective film with a reflectivity of ≥97%, a thickness of 0.07 mm, and an optical adhesive on the back.

[0024] Furthermore, in step 4.2.2:

[0025] The area of ​​the reflective film is smaller than the front surface area of ​​the cathode.

[0026] Furthermore, step 3 specifically includes:

[0027] 3.1. Connect and tighten the image intensifier whose anode and cathode are parallel to each other to the image intensifier center reference lead-out tooling, so that the anode of the image intensifier faces the autocollimator;

[0028] 3.2. Adjust the anode reflection image jitter of the image intensifier anode in the autocollimator to the minimum through the four-dimensional adjustment bracket adapter tooling;

[0029] 3.3. Using the anode reflection image of the image intensifier's anode in the autocollimator as the calibration reference, control the turning feed amount, and use a high-precision centering lathe to process and calibrate the anode flange end face of the image intensifier so that the anode and the anode flange end faces are parallel to each other.

[0030] Furthermore, in step 3.3:

[0031] The turning feed Where D is the flange diameter of the image intensifier, and rpm is the rotation speed of the high-precision centering lathe.

[0032] Furthermore, step 2 specifically includes:

[0033] 2.1. Adjust the outer circle swing of the four-dimensional adjustment bracket transfer fixture by using the four-dimensional adjustment bracket, and use a micrometer to measure it so that the swing value t0 satisfies t0∈(0mm, 0.02mm);

[0034] 2.2. Connect and tighten the image intensifier center reference lead-out fixture to the four-dimensional adjustment bracket adapter fixture.

[0035] Furthermore, step 1 specifically includes:

[0036] 1.1. Place the theodolite on the two-dimensional adjustment table, and place the two-dimensional adjustment table on the left side of the high-precision centering lathe;

[0037] 1.2. Place the autocollimator on the right side of the high-precision centering lathe and make it coaxial with the spindle of the high-precision centering lathe;

[0038] 1.3. Adjust the theodolite to infinity and use the two-dimensional adjustment table to make the theodolite and autocollimator coaxially coincide.

[0039] Furthermore, step 5 is specifically as follows:

[0040] Use a three-coordinate measuring instrument to test the flatness of the anode flange end face of the image intensifier, the flatness of the cathode flange end face, the parallelism of the anode and anode flange end faces, and the parallelism of the anode and cathode flange end faces. If all four meet the requirements, the processing and correction of the image intensifier is completed. Otherwise, return to step 3 until all four meet the requirements.

[0041] Beneficial effects of the present invention:

[0042] 1. The reference processing and correction method for improving the coaxial accuracy of the detector assembly coupling provided by the present invention respectively arranges a theodolite and an autocollimator on the left and right sides of a high-precision centering lathe to respectively process and correct the anode flange end face of the image intensifier, the cathode flange end face of the image intensifier and the image intensifier center reference lead-out tooling. The processing and correction has a unique reference, thereby greatly improving the parallel accuracy of each surface on the image intensifier and the flatness of the image intensifier center reference lead-out tooling, and can further improve the coaxial accuracy of the detector assembly coupling.

[0043] 2. The present invention sticks a reflective film on the cathode of the image intensifier, adjusts the eyepiece hand wheel, observes the reflected image of the reflective film in the autocollimator to judge the reflected image of the rear surface of the cathode of the image intensifier, thereby improving the recognition of the reflected images on the front and rear surfaces of the photocathode of the image intensifier, reducing the probability of incorrect judgment of the image point position during optical centering, and improving the accuracy of the reference calibration of the image intensifier when the coaxial coupling is used.

[0044] 3. Compared with ordinary plane reflectors, the LED reflective film used in the present invention has a high reflectivity, can better fit with the surface of the image intensifier photocathode, and the adhesive layer is easy to clean; at the same time, it can reduce the risk of scratching the surface of the image intensifier photocathode.

[0045] 4. The present invention uses a theodolite to process and calibrate the image intensifier center reference lead-out tooling, which can improve the parallelism between the image intensifier center reference lead-out tooling and the image intensifier anode from a minimum of 0.015 mm to a maximum of 0.01 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is one of the structural diagrams of the image intensifier;

[0047] Figure 2 This is the second structural diagram of the image intensifier;

[0048] Figure 3 It is a flow chart of an embodiment of a reference processing correction method for improving the coupling coaxial accuracy of a detector assembly according to the present invention;

[0049] Figure 4 is a schematic structural diagram of the coaxial theodolite and the autocollimator in step 1 of an embodiment of the present invention;

[0050] Figure 5 It is a structural schematic diagram of the image intensifier center reference lead-out tooling used in step 2 of an embodiment of the present invention;

[0051] Figure 6 It is a schematic diagram of the reflected images in steps 4.2.1 to 4.2.3 in an embodiment of the present invention, wherein (a) is a schematic diagram of the reflected image observed through the eyepiece on the autocollimator when the reflective film is not pasted, and (b) is a schematic diagram of the reflected image observed through the eyepiece on the autocollimator when the reflective film is pasted.

[0052] Figure Number:

[0053] 01-anode, 02-anode flange end face, 03-cathode, 04-cathode flange end face; 2-1, theodolite, 2-2, autocollimator, 2-3, two-dimensional adjustment table, 2-4, eyepiece, 2-5, handwheel, 3-1, spindle box, 3-2, four-dimensional adjustment bracket, 3-3, four-dimensional adjustment bracket adapter, 4-1, image intensifier center reference lead-out fixture, 4-3, cable protection groove, 5-1, reference cross image, 5-2, first bright cross reflection image, 5-3-1, second bright cross reflection image, 5-3-2, third bright cross reflection image. DETAILED DESCRIPTION

[0054] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] The embodiment of the present invention provides a reference processing correction method for improving the coaxial accuracy of the detector assembly coupling, such as Figure 3 As shown, the following steps are included:

[0056] Step 1: Figure 4 As shown, the theodolite 2-1 and the autocollimator 2-2 are placed on the left and right sides of the high-precision centering lathe respectively, and the theodolite 2-1 and the autocollimator 2-2 are coaxially overlapped at infinity; the high-precision centering lathe is provided with a spindle box 3-1, a four-dimensional adjustment bracket 3-2 and a four-dimensional adjustment bracket transfer tooling 3-3 connected in sequence; specifically comprising:

[0057] 1.1. Place the theodolite 2-1 on the two-dimensional adjustment table 2-3, and place the two-dimensional adjustment table 2-3 on the left side of the high-precision centering lathe;

[0058] 1.2. Place the autocollimator 2-2 on the right side of the high-precision centering lathe and make it coaxial with the main axis of the high-precision centering lathe;

[0059] 1.3. Adjust the theodolite 2-1 to infinity, and make the theodolite 2-1 and the autocollimator 2-2 coaxially coincide with each other through the two-dimensional adjustment platform 2-3.

[0060] Step 2: Connect and tighten the image intensifier center reference lead-out fixture 4-1 to the four-dimensional adjustment bracket adapter fixture 3-3 through screws; specifically, Figure 5 As shown, a cable protection groove 4-3 is provided on the image intensifier center reference lead-out tooling 4-1, and 3M tape can be used to adhere and fix the intensifier cable during the processing and calibration process to prevent damage;

[0061] 2.1. Adjust the outer circle swing of the four-dimensional adjustment bracket transfer fixture 3-3 through the four-dimensional adjustment bracket 3-2, and use a micrometer to measure it so that the swing value t0 satisfies t0∈(0mm, 0.02mm);

[0062] 2.2. Connect and tighten the image intensifier center reference lead-out fixture 4-1 and the four-dimensional adjustment bracket adapter fixture 3-3.

[0063] Step 3, connecting and fastening the image intensifier whose anode 01 and cathode 03 are parallel to each other to the image intensifier center reference lead-out tooling 4-1, so that the anode 01 of the image intensifier faces the autocollimator 2-2, and using the reflected image of the anode 01 of the image intensifier in the autocollimator 2-2 as the correction reference, using a high-precision centering lathe to process and correct the anode flange end face 02 of the image intensifier, so that the anode 01 and the anode flange end face 02 are parallel to each other; specifically comprising:

[0064] 3.1. Connect and tighten the image intensifier whose anode 01 and cathode 03 are parallel to each other to the image intensifier center reference lead-out tooling 4-1, so that the anode 01 of the image intensifier faces the autocollimator 2-2;

[0065] 3.2. By adjusting the slider and different hole distances on the four-dimensional adjustment bracket adapter tooling 3-3, the anode reflection image jitter of the image intensifier anode 01 in the autocollimator 2-2 is adjusted to the minimum;

[0066] 3.3. Use the anode reflection image of the image intensifier anode 01 in the autocollimator 2-2 as the calibration reference to control the turning feed rate A high-precision centering lathe is used to process and calibrate the anode flange end face 02 of the image intensifier so that the anode 01 and the anode flange end face 02 are parallel to each other; wherein D is the flange diameter of the image intensifier, and rpm is the rotation speed of the high-precision centering lathe.

[0067] Step 4: reconnect and tighten the image intensifier to the image intensifier center reference lead-out fixture 4-1, so that the cathode 03 of the image intensifier faces the autocollimator 2-2, and use the reflected image of the cathode 03 of the image intensifier in the autocollimator 2-2 as the correction reference, and use a high-precision centering lathe to process and correct the cathode flange end face 04 of the image intensifier so that the anode 01 and the cathode flange end face 04 are parallel to each other; specifically including:

[0068] 4.1. Reconnect the image intensifier to the image intensifier center reference lead-out fixture 4-1 and tighten it, so that the cathode 03 of the image intensifier faces the autocollimator 2-2;

[0069] 4.2. Paste a reflective film on the front surface of the image intensifier cathode 03, and judge the reflected image of the rear surface of the cathode 03 in the autocollimator 2-2 by the reflected image of the reflective film in the autocollimator 2-2; specifically including:

[0070] 4.2.1, such as Figure 6 As shown in (a), the autocollimator 2-2 is adjusted to infinity, and through the eyepiece 2-4 on the autocollimator 2-2, it can be observed that the cathode 03 of the image intensifier has a first bright cross reflection image 5-2, a second bright cross reflection image 5-3-1 and a reference cross image 5-1, wherein the first bright cross reflection image 5-2 and the second bright cross reflection image 5-3-1 are respectively the front surface reflection image and the back surface reflection image of the cathode 03, and the reference cross image 5-1 is the reflection image of the built-in graticule of the autocollimator 2-2; the front surface reflection image is the surface reflection image of the cathode 03 away from the anode 01;

[0071] 4.2.2, such as Figure 6 As shown in (b), a reflective film is pasted on the front surface of the cathode 03 of the image intensifier, and the first bright cross reflection image 5-2, the second bright cross reflection image 5-3-1, the third bright cross reflection image 5-3-2 and a reference cross image 5-1 can be observed in the eyepiece 2-4, wherein the extra third bright cross reflection image 5-3-2 is the reflection image of the reflective film; the pasted reflective film is an LED liquid crystal reflective film, with a reflectivity of ≥97% and a thickness of 0.07mm, and an optical glue is provided on the back to facilitate the removal and cleaning of the excess on the surface of the photocathode of the image intensifier. The pasted reflective film area is smaller than the front surface area of ​​the cathode 03.

[0072] 4.2.3. Rotate the hand wheel 2-5 of the eyepiece 2-4 so that the extra bright cross reflection image is infinitely close to one of the other two bright cross reflection images, and the other of the other two bright cross reflection images is the rear surface reflection image of the cathode 03. Specifically, rotate the hand wheel 2-5 of the eyepiece 2-4 so that the third bright cross reflection image 5-3-2 approaches the second bright cross reflection image 5-3-1, and thus the first bright cross reflection image 5-2 is the rear surface reflection image of the cathode 03.

[0073] 4.3. Adjust the reflection image jitter of the reflection film in the autocollimator 2-2 to the minimum through the four-dimensional adjustment bracket adapter 3-3, usually making the reflection image jitter V ≤ 1 μm;

[0074] 4.4. Using the rear surface reflection image in the autocollimator 2-2 as the correction reference, control the turning feed amount, and use a high-precision centering lathe to process and correct the cathode flange end face 04 of the image intensifier so that the anode 01 and the cathode flange end face 04 are parallel to each other.

[0075] Step 5: Use a three-coordinate measuring instrument to detect the flatness of the anode flange end face 02 of the image intensifier, the flatness of the cathode flange end face 04, the parallelism of the anode 01 and the anode flange end face 02, and the parallelism of the anode 01 and the cathode flange end face 04. If all four meet the requirements, the processing correction of the image intensifier is completed. Otherwise, return to step 3 until all four meet the requirements. Specifically, the detected parallelism is required to be better than 0.01mm and the flatness is better than 0.01mm.

[0076] Step 6: Connect and tighten the image intensifier to the image intensifier center reference lead-out tooling 4-1, so that the anode 01 of the image intensifier faces the theodolite 2-1. Using the theodolite autocollimation image reflected by the anode 01 as a reference, use a high-precision centering lathe to process and correct the flatness of the surface of the image intensifier center reference lead-out tooling 4-1.

[0077] Step 7: Check the flatness of the surface of the image intensifier center reference lead-out tooling 4-1. If it does not meet the requirements, return to step 6 until it meets the requirements, and the reference processing correction for improving the coaxial accuracy of the detector assembly coupling is completed.

[0078] When connecting and tightening all components in the above steps, a torque wrench must be used to control the tightening torque.

[0079] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A reference processing correction method for improving the coaxial accuracy of detector assembly coupling, characterized in that: The following steps are involved: Step 1, placing a theodolite (2-1) and an autocollimator (2-2) on the left and right sides of a high-precision centering lathe respectively, and making the theodolite (2-1) and the autocollimator (2-2) coaxially overlap at infinity; the high-precision centering lathe is provided with a spindle box (3-1), a four-dimensional adjustment bracket (3-2) and a four-dimensional adjustment bracket transfer tooling (3-3) which are connected in sequence; Step 2, connecting and fastening the image intensifier center reference lead-out tooling (4-1) and the four-dimensional adjustment bracket adapter tooling (3-3); Step 3, connecting and fastening an image intensifier whose anode (01) and cathode (03) are parallel to each other to an image intensifier center reference lead-out tooling (4-1), so that the anode (01) of the image intensifier faces the autocollimator (2-2), and using a reflected image of the anode (01) of the image intensifier in the autocollimator (2-2) as a correction reference, using a high-precision centering lathe to process and calibrate the anode flange end face (02) of the image intensifier, so that the anode (01) and the anode flange end face (02) are parallel to each other; Step 4, reconnecting and tightening the image intensifier to the image intensifier center reference lead-out tooling (4-1), so that the cathode (03) of the image intensifier faces the autocollimator (2-2), using the reflected image of the cathode (03) of the image intensifier in the autocollimator (2-2) as a correction reference, and using a high-precision centering lathe to process and calibrate the cathode flange end face (04) of the image intensifier so that the anode (01) and the cathode flange end face (04) are parallel to each other; Step 5, respectively inspect the flatness of the anode flange end face (02) of the image intensifier, the flatness of the cathode flange end face (04), the parallelism of the anode (01) and the anode flange end face (02), and the parallelism of the anode (01) and the cathode flange end face (04). If all four meet the requirements, the image intensifier processing correction is completed. Otherwise, return to step 3 until all four meet the requirements. Step 6, connect and tighten the image intensifier to the image intensifier center reference lead-out tooling (4-1), so that the anode (01) of the image intensifier faces the theodolite (2-1), and use a high-precision centering lathe to process and calibrate the surface of the image intensifier center reference lead-out tooling (4-1) facing the autocollimator (2-2) with the theodolite autocollimation image reflected by the anode (01) as a reference, so that it is parallel to the anode (01); Step 7, check the surface flatness of the image intensifier center reference lead-out tooling (4-1) toward the autocollimator (2-2) and the parallelism of the surface with the anode (01). If both meet the requirements, the reference processing correction for improving the coaxial accuracy of the detector assembly coupling is completed. Otherwise, return to step 6 until both meet the requirements.

2. The reference processing and correction method for improving the coupling coaxial accuracy of the detector assembly according to claim 1 is characterized in that: Step 4 specifically includes: 4.

1. Reconnect the image intensifier to the image intensifier center reference lead-out tooling (4-1) and tighten it, so that the cathode (03) of the image intensifier faces the autocollimator (2-2); 4.

2. A reflective film is attached to the front surface of the cathode (03) of the image intensifier, and the reflected image of the rear surface of the cathode (03) in the autocollimator (2-2) is determined by the reflected image of the reflective film in the autocollimator (2-2); 4.

3. The reflection image jitter of the reflection film in the autocollimator (2-2) is adjusted to a minimum through the four-dimensional adjustment bracket adapter tooling (3-3); 4.

4. Using the rear surface reflection image in the autocollimator (2-2) as a calibration reference, control the turning feed rate, and use a high-precision centering lathe to process and calibrate the cathode flange end face (04) of the image intensifier so that the anode (01) and the cathode flange end face (04) are parallel to each other.

3. The reference processing and correction method for improving the coupling coaxial accuracy of the detector assembly according to claim 2 is characterized in that: Step 4.2 specifically includes: 4.2.

1. Adjust the autocollimator (2-2) to infinity, and observe through the eyepiece (2-4) on the autocollimator (2-2) that the cathode (03) of the image intensifier has two bright cross reflection images and one reference cross image, wherein the two bright cross reflection images are respectively a front surface reflection image and a rear surface reflection image of the cathode (03), and the reference cross image is a reflection image of the built-in graticule of the autocollimator (2-2); the front surface reflection image is a surface reflection image of the cathode (03) away from the anode (01); 4.2.

2. A reflective film is pasted on the front surface of the cathode (03) of the image intensifier, and three bright cross reflection images and one reference cross image can be observed in the eyepiece (2-4), wherein the extra bright cross reflection image is the reflection image of the reflective film; 4.2.

3. Adjust the hand wheel (2-5) of the eyepiece (2-4) so ​​that the extra bright cross reflection image is infinitely close to one of the other two bright cross reflection images, and the other of the other two bright cross reflection images is the rear surface reflection image of the cathode (03).

4. The reference processing and correction method for improving the coupling coaxial accuracy of the detector assembly according to claim 3 is characterized in that: In step 4.2.2: The reflective film is an LED liquid crystal reflective film with a reflectivity of ≥97%, a thickness of 0.07 mm, and an optical adhesive on the back.

5. The reference processing and correction method for improving the coupling coaxial accuracy of the detector assembly according to claim 4, characterized in that: In step 4.2.2: The area of ​​the reflective film is smaller than the front surface area of ​​the cathode (03).

6. The reference processing and correction method for improving the coupling coaxial accuracy of a detector assembly according to any one of claims 1 to 5, characterized in that: Step 3 specifically includes: 3.

1. Connecting and fastening an image intensifier whose anode (01) and cathode (03) are parallel to each other to an image intensifier center reference lead-out tooling (4-1), so that the anode (01) of the image intensifier faces the autocollimator (2-2); 3.

2. The anode reflection image jitter of the image intensifier anode (01) in the autocollimator (2-2) is adjusted to a minimum through the four-dimensional adjustment bracket adapter tooling (3-3); 3.

3. Using the anode reflection image of the anode (01) of the image intensifier in the autocollimator (2-2) as a calibration reference, control the turning feed rate, and use a high-precision centering lathe to perform machining calibration on the anode flange end face (02) of the image intensifier so that the anode (01) and the anode flange end face (02) are parallel to each other.

7. The reference processing and correction method for improving the coupling coaxial accuracy of the detector assembly according to claim 6, characterized in that: In step 3.3: The turning feed Where D is the flange diameter of the image intensifier, and rpm is the rotation speed of the high-precision centering lathe.

8. The reference processing and correction method for improving the coupling coaxial accuracy of the detector assembly according to claim 7, characterized in that: Step 2 specifically includes: 2.

1. The outer circle shake of the four-dimensional adjustment bracket transfer fixture (3-3) is adjusted by the four-dimensional adjustment bracket (3-2), and measured by a micrometer so that the shake value t0 satisfies t0∈(0mm, 0.02mm); 2.

2. Connect and tighten the image intensifier center reference lead-out fixture (4-1) and the four-dimensional adjustment bracket adapter fixture (3-3).

9. The reference processing and correction method for improving the coupling coaxial accuracy of the detector assembly according to claim 8, characterized in that: Step 1 specifically includes: 1.

1. Place the theodolite (2-1) on the two-dimensional adjustment table (2-3), and place the two-dimensional adjustment table (2-3) on the left side of the high-precision centering lathe; 1.

2. Place the autocollimator (2-2) on the right side of the high-precision centering lathe and make it coaxial with the main axis of the high-precision centering lathe; 1.

3. Adjust the theodolite (2-1) to infinity, and use the two-dimensional adjustment platform (2-3) to make the theodolite (2-1) and the autocollimator (2-2) coaxially coincide.

10. The reference processing and correction method for improving the coupling coaxial accuracy of the detector assembly according to claim 9, characterized in that: Step 5 is as follows: Use a three-coordinate measuring machine to detect the flatness of the anode flange end face (02) of the image intensifier, the flatness of the cathode flange end face (04), the parallelism of the anode (01) and the anode flange end face (02), and the parallelism of the anode (01) and the cathode flange end face (04). If all four meet the requirements, the processing and correction of the image intensifier is completed. Otherwise, return to step 3 until all four meet the requirements.

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