A digital assembly device and method for pressing together multiple planar optical element blocks

Abstract

This invention relates to the field of optomechanical assembly technology, specifically to a digital assembly device and method for pressing multiple planar optical element blocks, comprising: a displacement detection module, a detection bracket, a detection reference fixture, and a computer; the displacement detection module is used to measure the installation height deviation between two optical elements on an optical element structure relative to the optical element structure, and to detect the processing error of the pressing surface of the pressing block of the optical element structure; the detection bracket is used to simulate the theoretical relative position height of the pressing surface of the pressing block of the optical element structure; the detection reference fixture is used to calibrate the installation accuracy of the displacement detection module on the detection bracket; the computer is used to obtain the mounting surface of the pressing block and the fitting dimensions of each pressing surface based on the installation height deviation and processing error values. This invention effectively measures the surface position of optical elements, prevents the influence of high transmittance or high reflectance on the measurement results, thereby improving the subsequent assembly accuracy.

Description

Technical Field

[0001] This invention relates to the field of optomechanical assembly technology, and more specifically to a digital assembly device and method for pressing together multiple planar optical element blocks. Background Technology

[0002] The installation of planar optical elements includes the installation of optical windows, mirrors, semi-reflective lenses, and prisms. This installation process often requires pressing rubber pads onto the planar optical elements using pressure blocks to ensure the structural strength of the optical elements and limit vibration. Therefore, the installation position accuracy of the pressure blocks, especially the height accuracy of the pressure block's pressing surface relative to the surface of the planar optical element, directly determines the amount of pressure applied to the rubber pads, affects the preload of the planar optical elements, and ultimately affects the imaging quality and structural strength of the optomechanical system.

[0003] For clamping blocks that press together multiple planar optical elements, the measurement, fitting, and installation of the clamping block position are more complex due to its structural characteristics. On the one hand, because the spatial angles of each optical element are different, contact measurement is prone to interference between parts and scratches on the optical elements. On the other hand, the spatial angle of the clamping surface of the clamping block causes the clamping loads of different planes to be coupled with each other. After the clamping block is fitted to meet the clamping load of one optical element, the clamping load of another optical element will change accordingly, and its adjustment calculation is quite complex. In addition, because there is a spatial angle between the mounting surface and the clamping surface of the clamping block, the positional accuracy of the clamping block measurement and the formal assembly process affects the accuracy of the clamping load. It is necessary to ensure the repeatability of the clamping block measurement and installation.

[0004] Therefore, there is a need to provide a digital assembly device and assembly method for pressing multiple planar optical element blocks to solve the above problems. Summary of the Invention

[0005] This invention provides a digital assembly device and method for pressing multiple planar optical element blocks. For the assembly of blocks for multi-planar optical elements, it realizes non-contact precision measurement of the pressing amount of the blocks, automatic calculation of the fitting amount of the pressing surface of the blocks, and high-precision repeatable positioning and installation of the blocks, so as to solve the problem that the positional accuracy of the pressing amount affects the accuracy of the pressing amount in the prior art.

[0006] The digital assembly device for pressing multiple planar optical element blocks according to the present invention adopts the following technical solution, including: a displacement detection module, a detection bracket, a detection reference fixture, and a computer;

[0007] The displacement detection module is used to measure the installation height deviation between two optical elements on the optical element structure relative to the optical element structure, and to detect the processing error of the pressing surface of the pressing block of the optical element structure.

[0008] The testing bracket is used to simulate the theoretical relative position height of the pressing surfaces of the pressure blocks of optical component structures;

[0009] The testing reference fixture is used to calibrate the installation accuracy of the displacement detection module on the testing bracket;

[0010] The computer is used to obtain the mounting surface and fitting dimensions of each pressing surface of the pressure block based on the installation height deviation and processing error values.

[0011] Preferably, the detection bracket includes: a bracket assembly surface, two bracket calibration reference surfaces, and two sensor first mounting surfaces; the spatial angle of the assembly surface of the detection bracket relative to the two calibration reference surfaces is the same as the spatial angle of the mounting surface of the pressure block relative to the two pressing surfaces of the pressure block; the two calibration reference surfaces of the detection bracket correspond one-to-one with and are parallel to the two sensor first mounting surfaces; the two sensor first mounting surfaces of the detection bracket are used to cooperate with the displacement detection module.

[0012] Preferably, the testing reference fixture includes: a fixture assembly surface, two fixture calibration reference surfaces, and two sensor second mounting surfaces; the spatial angle between the fixture assembly surface and the two fixture calibration reference surfaces is the same as the spatial angle between the mounting surface of the pressure block and the two pressing surfaces of the pressure block; the two fixture calibration reference surfaces correspond one-to-one with and are parallel to the two sensor second mounting surfaces; wherein, the two fixture calibration reference surfaces of the testing reference fixture correspond and cooperate with the two support calibration reference surfaces of the testing bracket.

[0013] Preferably, the displacement detection module includes two laser coaxial displacement gauges, wherein the laser coaxial displacement gauges are used to be mounted on the first sensor mounting surface of the detection bracket or on the second sensor mounting surface.

[0014] Preferably, the mounting surface of the pressure block and the mounting surface of the testing bracket are both used to mate with the tooling assembly surface of the testing reference tooling.

[0015] A digital assembly method for pressing together multiple planar optical element blocks, employing the following technical solution, specifically includes:

[0016] Install the testing bracket on the testing reference fixture, and install two laser coaxial displacement gauges on the testing bracket accordingly; use the laser coaxial displacement gauges to measure the fixture calibration reference surface corresponding to the testing reference fixture, and calibrate the zero position of the assembly height of the optical element of the optical element structure based on the measurement results;

[0017] The detection bracket equipped with the laser coaxial displacement meter is installed on the optical element structure; the laser coaxial displacement meter is used to measure the installation height deviation of the two optical elements relative to the corresponding optical element structure.

[0018] Install the testing bracket on the tooling assembly surface of the testing reference fixture, and install two laser coaxial displacement gauges on the corresponding sensor second mounting surface of the testing reference fixture; use the laser coaxial displacement gauges to measure the bracket calibration reference surface corresponding to the testing bracket, and calibrate the zero point of the height processing error of the pressing surface corresponding to the pressure block measured by the laser coaxial displacement gauges according to the measurement results;

[0019] Install the pressure block on the inspection reference fixture; use two laser coaxial displacement gauges to measure the machining error corresponding to the two pressing surfaces of the pressure block;

[0020] Based on two installation height deviation values ​​and two processing error values, obtain the fitting dimensions corresponding to the pressing surface and mounting surface of the pressure block, and fit the pressure block according to the fitting dimensions;

[0021] The repaired pressure block is installed on the optical element structure.

[0022] Preferably, the steps for obtaining the fitting dimensions corresponding to the pressing surface and mounting surface of the pressure block are as follows:

[0023] The fit error between the two pressing surfaces of the pressure block and the corresponding optical element is calculated based on two installation height deviation values ​​and two processing error values.

[0024] The fitting coefficient corresponding to the pressing surface of the pressing block is obtained based on the spatial angle between the surface of the optical element and the pressing block mounting surface of the optical element structure.

[0025] Based on the magnitude of the two fit errors, determine the fit surface and fit amount of the briquette.

[0026] Preferably, the fit error expression between the two pressing surfaces and the corresponding optical elements is:

[0027] ΔH1=Δh11+Δh12, ΔH2=Δh21+Δh22

[0028] In the formula, ΔH1 is the fitting error between the first pressing surface and the first optical element; ΔH2 is the fitting error between the second pressing surface and the second optical element; Δh11 is the installation height deviation of the first optical element relative to the optical element structure; Δh12 is the installation height deviation of the second optical element relative to the optical element structure; Δh21 is the processing error of the first pressing surface of the pressing block; and Δh22 is the processing error of the second pressing surface of the pressing block.

[0029] The expression for the fitting coefficient corresponding to the pressing surface of the briquette is:

[0030] D1= D2=

[0031] In the formula, D1 represents the grinding coefficient of the first pressing surface of the pressing block; D2 represents the grinding coefficient of the second pressing surface of the pressing block. This indicates the spatial angle between the surface of the first optical element and the mounting surface of the pressure block of the optical element structure. This indicates the spatial angle between the surface of the second optical element and the mounting surface of the pressure block of the optical element structure.

[0032] Preferably, the steps for determining the fitting surface and fitting amount of the briquette are as follows:

[0033] If ΔH1≤0 and ΔH2≤0, then the first pressing surface fitting amount H1=-ΔH1 and the second pressing surface fitting amount H2=-ΔH2 of the pressing block corresponding to the first optical element.

[0034] If ΔH1≤0 and ΔH2>0, then the fitting amount of the mounting surface of the clamping block H3=ΔH2 / D2, and the fitting amount of the first pressing surface of the clamping block corresponding to the first optical element H1=ΔH2*D1 / D2-ΔH1;

[0035] If ΔH1>0 and ΔH2≤0, then the fitting amount of the mounting surface of the pressure block H3=ΔH1 / D1, and the fitting amount of the second pressing surface of the pressure block corresponding to the second optical element H2=ΔH1*D2 / D1-ΔH2;

[0036] If ΔH1>0, ΔH2>0, and ΔH1 / D1≥ΔH2 / D2, then the fitting amount of the mounting surface of the pressure block H3=ΔH1 / D1, and the fitting amount of the second pressing surface of the pressure block corresponding to the second optical element H2=ΔH1*D2 / D1-ΔH2;

[0037] If ΔH1>0, ΔH2>0, and ΔH1 / D1<ΔH2 / D2, then the fitting amount of the mounting surface of the pressure block H3=ΔH2 / D2, and the fitting amount of the first pressing surface of the pressure block corresponding to the first optical element H1=ΔH2*D1 / D2-ΔH1.

[0038] Preferably, a rubber pad is provided on the pressing surface of the repaired pressure block, so that the rubber pad of the pressure block installed on the optical element structure presses against the corresponding optical element.

[0039] The beneficial effects of this invention are:

[0040] 1. The displacement detection module is used to measure the installation height deviation of the optical element relative to the optical element structure. On the one hand, it can avoid interference or scratches to the optical element with the parts by contact measurement method. On the other hand, it can effectively measure the surface position of the optical element and prevent the influence of high transmittance or high reflectance on the measurement results, thereby improving the subsequent assembly accuracy.

[0041] 2. Both the testing bracket and the testing reference fixture have two calibration reference surfaces and two sensor mounting surfaces. Before the laser coaxial displacement meter is installed on the testing bracket or testing reference fixture for measurement, the zero-point calibration of the laser coaxial displacement meter can be completed using the testing bracket and testing reference fixture. The calibration error is small and the manufacturing cost is low. The two pin screws, in conjunction with the mounting pin holes for the testing bracket and the pressure block, enable the testing bracket and the pressure block to be quickly and accurately and repeatedly installed on the testing reference fixture or optical component structure within a compact space, ensuring the fitting accuracy of the pressure block's load. The computer collects the laser coaxial displacement measurement data and automatically determines the pressure block's fitting surface and fitting amount, eliminating the need for repeated manual calculations, trial installations, and retests, thus improving assembly efficiency and quality. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the overall structure of a digital assembly device for pressing multiple planar optical element blocks according to the present invention;

[0044] Figure 2 This is a schematic diagram of the structure of the optical element in an embodiment of the present invention;

[0045] Figure 3 A schematic diagram of the bracket assembly surface of the test bracket, the two bracket calibration reference surfaces, and the first mounting surfaces of the two sensors;

[0046] Figure 4 A schematic diagram of the tooling assembly surface of the reference tooling, two tooling calibration reference surfaces, and two sensor second mounting surfaces for testing;

[0047] Figure 5 This is a schematic diagram showing the installation of the pressure block and optical component structure.

[0048] Figure 6 An assembly diagram showing the calibration of the zero position of the optical component assembly height by mounting two laser coaxial displacement gauges and a detection bracket on a measurement and detection reference fixture;

[0049] Figure 7 An assembly diagram showing the installation height deviation of two optical elements relative to the optical element structure, with two laser coaxial displacement gauges and a detection bracket mounted on the optical element structure.

[0050] Figure 8An assembly diagram for calibrating the zero point of the machining error measurement of the height of each pressing surface of the pressure block using a testing bracket and a testing reference fixture;

[0051] Figure 9 An assembly diagram showing the use of two laser coaxial displacement gauges to measure the machining error of the two pressing surfaces of the pressure block;

[0052] Figure 10 This is an assembly diagram of the pressure block being mounted on the optical element structure.

[0053] In the figure: 1. First laser coaxial displacement meter; 2. Second laser coaxial displacement meter; 3. Detection bracket; 4. Detection reference fixture; 5. Pin screw; 6. Computer; 7. Optical element structure; 8. First optical element; 9. Second optical element; 10. Pressure block; 11. Rubber pad. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] An embodiment of the digital assembly apparatus for pressing multiple planar optical element blocks according to the present invention, such as... Figure 1 and 2 As shown, it includes: a displacement detection module, a detection bracket 3, a detection reference fixture 4, and a computer 6; the displacement detection module includes: a first laser coaxial displacement meter 1 and a second laser coaxial displacement meter 2. The displacement detection module is used to measure the installation height deviation of the two optical elements on the optical element structure 7 relative to the optical element structure 7, and to detect the processing error of the pressing surface of the pressure block 10 of the optical element structure 7; the detection bracket 3 is used to simulate the theoretical relative position height of the pressing surface of the pressure block 10 of the optical element structure 7; the detection reference fixture 4 is used to calibrate the installation accuracy of the displacement detection module on the detection bracket 3; the computer 6 is used to obtain the fitting dimensions of the mounting surface and each pressing surface of the pressure block 10 based on the installation height deviation value and the processing error value.

[0056] like Figure 3As shown, the detection bracket 3 in this embodiment includes: a bracket assembly surface, two bracket calibration reference surfaces, and two sensor first mounting surfaces; the spatial angle of the assembly surface of the detection bracket 3 relative to the two calibration reference surfaces is the same as the spatial angle of the mounting surface of the pressure block 10 relative to the two pressing surfaces of the pressure block 10; the two calibration reference surfaces of the detection bracket 3 correspond one-to-one with the two sensor first mounting surfaces and are parallel; the two sensor first mounting surfaces of the detection bracket 3 are used to cooperate with the displacement detection module.

[0057] like Figure 4 As shown, the detection reference fixture 4 in this embodiment includes: a fixture assembly surface, two fixture calibration reference surfaces, and two sensor second mounting surfaces; the spatial angle between the fixture assembly surface and the two fixture calibration reference surfaces is the same as the spatial angle between the mounting surface of the pressure block 10 and the two pressing surfaces of the pressure block 10; the two fixture calibration reference surfaces correspond one-to-one with the two sensor second mounting surfaces and are parallel; the two bracket calibration reference surfaces of the detection reference fixture 4 cooperate with the bracket calibration reference surface of the detection bracket 3 to calibrate the height measured by the first laser coaxial displacement meter 1 and the second laser coaxial displacement meter 2; wherein, the two fixture calibration reference surfaces of the detection reference fixture 4 correspond to and cooperate with the two bracket calibration reference surfaces of the detection bracket 3; wherein, the first laser coaxial displacement meter 1 and the second laser coaxial displacement meter 2 are used to be installed on the two sensor first mounting surfaces corresponding to the detection bracket 3 or on the two sensor second mounting surfaces corresponding to the detection reference fixture 4.

[0058] Specifically, the mounting surface of the pressure block 10 and the bracket assembly surface of the detection bracket 3 are used to cooperate with the tooling assembly surface of the detection reference tooling 4. In this embodiment, the pin screw 5 is used to cooperate with the pin hole on the detection bracket 3 or the pressure block 10 to precisely and repeatedly install the detection bracket 3 and the pressure block 10 on the detection reference tooling 4 or the optical element structure 7.

[0059] An embodiment of a digital assembly method for pressing together multiple planar optical element blocks includes the following steps:

[0060] Step 1: Calibrate the laser coaxial displacement meter to measure the zero position of the assembly height of the optical element in the optical element structure 7;

[0061] Step 11: Install the detection bracket and laser coaxial displacement meter:

[0062] like Figure 6As shown, the detection bracket 3 is installed on the detection reference fixture 4 using two pins and screws 5, that is, the bracket assembly surface of the detection bracket 3 is fitted with the fixture assembly surface of the detection reference fixture 4, and the bracket calibration reference surface of the detection bracket 3 is fitted with the fixture calibration reference surface of the detection reference fixture 4; then, the laser coaxial displacement gauge is installed on the detection bracket 3, that is, the first laser coaxial displacement gauge 1 and the second laser coaxial displacement gauge 2 are installed on the sensor first mounting surface of the detection bracket 3 respectively.

[0063] Step 12: Calibrate the zero position of the assembly height;

[0064] The first laser coaxial displacement meter 1 and the second laser coaxial displacement meter 2 are used to measure the tooling calibration reference surface corresponding to the detection reference tooling 4, and the measurement results are transmitted to the computer 6. The computer 6 calibrates the first laser coaxial displacement meter 1 to measure the zero position of the assembly height of the first optical element 8, and calibrates the second laser coaxial displacement meter 2 to measure the zero position of the assembly height of the second optical element 9.

[0065] Step 2: Measure the installation height deviation between the two optical elements and the corresponding optical element structural components;

[0066] like Figure 7 As shown, the detection bracket 3, equipped with the first laser coaxial displacement meter 1 and the second laser coaxial displacement meter 2, is installed on the optical element structure 7 using two pin screws 5. Specifically, the bracket mounting surface of the detection bracket 3 is fitted with the mounting surface of the optical element structure 7, and the bracket calibration reference surface of the detection bracket 3 is fitted with the pressure block contact surface of the optical element structure 7. Then, the first laser coaxial displacement meter 1 is used to measure the installation height deviation value Δh11 of the first optical element 8 relative to the optical element structure 7, and the second laser coaxial displacement meter 2 is used to measure the installation height deviation value Δh21 of the second optical element 9 relative to the optical element structure 7. The installation height deviation values ​​are then transmitted to the computer 6.

[0067] Step 3: Calibrate the laser coaxial displacement gauge to determine the zero point for measuring the height of the pressing surface corresponding to the pressure block to determine the machining error.

[0068] Remove the first laser coaxial displacement gauge 1, the second laser coaxial displacement gauge 2, and the detection bracket 3; install the detection bracket 3 onto the tooling assembly surface of the detection reference fixture 4 using two pins and screws 5, as follows. Figure 8As shown, the first laser coaxial displacement gauge 1 and the second laser coaxial displacement gauge 2 are respectively installed on the second mounting surfaces of the two sensors corresponding to the detection reference fixture 4; the first laser coaxial displacement gauge 1 and the second laser coaxial displacement gauge 2 are used to measure the corresponding two bracket calibration reference surfaces on the detection bracket 3, and the measurement results are transmitted to the computer 6; the computer 6 calibrates the measurement zero point of the height processing error of each pressing surface of the pressure block 10 by the first laser coaxial displacement gauge 1, the second laser coaxial displacement gauge 2, and the detection bracket 3 according to the measurement results;

[0069] Step 4: Measure the machining error of the two pressing surfaces of the pressure block;

[0070] Remove the testing bracket 3 and install the pressure block 10 onto the testing reference fixture 4 using two pin screws 5; Figure 9 As shown, the machining error Δh12 of the first two pressing surfaces of the pressure block 10 is measured using the first laser coaxial displacement meter 1, and the machining error Δh22 of the second pressing surface of the pressure block 10 is measured using the second laser coaxial displacement meter 2, and the two machining error data are transmitted to the computer 6.

[0071] Step 5: Obtain the fitting dimensions of the pressing surface or mounting surface of the pressure block, and perform fitting;

[0072] Step 51: Obtain the fitting dimensions of the pressing surface or mounting surface of the pressure block;

[0073] Specifically, the fitting errors between the two pressing surfaces of the pressure block 10 and the corresponding optical elements are calculated based on the two installation height deviation values ​​and the two processing error values; the fitting coefficient corresponding to the pressing surface of the pressure block is obtained based on the spatial angle between the surface of the optical element and the pressing surface of the optical element structure 7; and the fitting surface and fitting amount of the pressure block 10 are determined based on the magnitude of the two fitting errors.

[0074] The fit error expression between the two pressing surfaces and the corresponding optical elements is as follows:

[0075] ΔH1=Δh11+Δh12, ΔH2=Δh21+Δh22

[0076] In the formula, ΔH1 is the fitting error between the first pressing surface of the pressing block and the first optical element; ΔH2 is the fitting error between the second pressing surface of the pressing block and the second optical element; Δh11 is the installation height deviation of the first optical element relative to the optical element structure; Δh12 is the installation height deviation of the second optical element relative to the optical element structure; Δh21 is the processing error of the first pressing surface of the pressing block; and Δh22 is the processing error of the second pressing surface of the pressing block.

[0077] The expression for the fitting coefficient corresponding to the pressing surface of the briquette is as follows:

[0078] D1= D2=

[0079] In the formula, D1 represents the grinding coefficient of the first pressing surface of the pressing block; D2 represents the grinding coefficient of the second pressing surface of the pressing block; as shown... Figure 5 As shown, This indicates the spatial angle between the surface of the first optical element and the mounting surface of the pressure block of the optical element structure. This indicates the spatial angle between the surface of the second optical element and the mounting surface of the pressure block of the optical element structure.

[0080] The steps for determining the fitting surface and fitting amount of the pressure block are as follows: If ΔH1≤0 and ΔH2≤0, then the fitting amount H1 of the first pressing surface of the pressure block 10 corresponding to the first optical element 8 is -ΔH1, and the fitting amount H2 of the second pressing surface of the pressure block 10 corresponding to the second optical element 9 is -ΔH2; if ΔH1≤0 and ΔH2>0, then the fitting amount H3 of the mounting surface of the pressure block 10 is ΔH2 / D2, and the fitting amount H1 of the first pressing surface of the pressure block 10 corresponding to the first optical element 8 is ΔH2*D1 / D2-ΔH1; if ΔH1>0 and ΔH2≤0, then the fitting amount H3 of the mounting surface of the pressure block 10 is ΔH1 / D1, and the fitting amount H1 of the second optical element 9 is -ΔH2. The fitting amount H2 of the second pressing surface of the pressing block 10 corresponding to the second optical element 9 is H2 = ΔH1*D2 / D1-ΔH2; if ΔH1>0, ΔH2>0, ΔH1 / D1≥ΔH2 / D2, then the fitting amount H3 of the mounting surface of the pressing block 10 is H3 = ΔH1 / D1, and the fitting amount H2 of the second pressing surface of the pressing block 10 corresponding to the second optical element 9 is H2 = ΔH1*D2 / D1-ΔH2; if ΔH1>0, ΔH2>0, ΔH1 / D1<ΔH2 / D2, then the fitting amount H3 of the mounting surface of the pressing block 10 is H3 = ΔH2 / D2, and the fitting amount H1 of the first pressing surface of the pressing block 10 corresponding to the first optical element 8 is H1 = ΔH2*D1 / D2-ΔH1.

[0081] Step 52: Adjusting the dimensions of the pressure block;

[0082] The briquettes are fitted according to their fitting surfaces and fitting amounts, such as... Figure 10 As shown, after the repair is completed, rubber pads 11 are installed on each pressing surface of the pressing block 10.

[0083] Step 6: Assembly of optical element structural components and pressure blocks;

[0084] like Figure 5As shown, the repaired pressure block 10 is installed on the optical element structure 7 using two pins 5. Specifically, the mounting surface of the pressure block 10 mates with the mounting surface of the optical element structure 7, and the pressing surface of the pressure block 10 mates with the contact surface of the pressure block on the optical element structure 7. During installation, the rubber pad 11 presses against the first optical element 8 and the second optical element 9. Finally, one pin 5 is removed, and the mounting screw of the pressure block 10 is tightened onto the optical element structure 7 through the pin hole of the pin 5. The other pin 5 is removed, and the mounting screw of the pressure block 10 is installed through the pin hole of the pin 5, thus completing the assembly of the optical element structure 7 and the pressure block 10. The assembled structure is shown below. Figure 10 As shown.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A digital assembly device for pressing together multiple planar optical element blocks, characterized in that, include: Displacement detection module, detection bracket, detection reference fixture and computer; The displacement detection module is used to measure the installation height deviation between two optical elements on the optical element structure relative to the optical element structure, and to detect the processing error of the pressing surface of the pressing block of the optical element structure. The testing bracket is used to simulate the theoretical relative position height of the pressing surfaces of the pressure blocks of optical component structures; The testing reference fixture is used to calibrate the installation accuracy of the displacement detection module on the testing bracket; The computer is used to obtain the mounting surface and fitting dimensions of each pressing surface of the pressure block based on the installation height deviation value and the processing error value; The detection bracket includes: a bracket assembly surface, two bracket calibration reference surfaces, and two sensor first mounting surfaces; the spatial angle of the detection bracket assembly surface relative to the two calibration reference surfaces is the same as the spatial angle of the mounting surface of the pressure block relative to the two pressing surfaces of the pressure block; the two calibration reference surfaces of the detection bracket correspond one-to-one with and are parallel to the two sensor first mounting surfaces; the two sensor first mounting surfaces of the detection bracket are used to cooperate with the displacement detection module. The testing reference fixture includes: a fixture assembly surface, two fixture calibration reference surfaces, and two sensor second mounting surfaces; the spatial angle between the fixture assembly surface and the two fixture calibration reference surfaces is the same as the spatial angle between the mounting surface of the pressure block and the two pressing surfaces of the pressure block; the two fixture calibration reference surfaces correspond one-to-one with and are parallel to the two sensor second mounting surfaces; wherein, the two fixture calibration reference surfaces of the testing reference fixture correspond and mate with the two support calibration reference surfaces of the testing bracket; The displacement detection module includes two laser coaxial displacement gauges, wherein the laser coaxial displacement gauges are used to be mounted on the first sensor mounting surface of the detection bracket or on the second sensor mounting surface.

2. The digital assembly device for pressing multiple planar optical element blocks according to claim 1, characterized in that, The mounting surface of the pressure block and the mounting surface of the testing bracket are both used to mate with the tooling assembly surface of the testing reference tooling.

3. A digital assembly method for pressing together multiple planar optical element blocks, characterized in that, The assembly is performed using the digital assembly device for pressing multiple planar optical element blocks as described in any one of claims 1-2, and the assembly steps include: Install the testing bracket on the testing reference fixture, and install two laser coaxial displacement gauges on the testing bracket accordingly; use the laser coaxial displacement gauges to measure the fixture calibration reference surface corresponding to the testing reference fixture, and calibrate the zero position of the assembly height of the optical element of the optical element structure based on the measurement results; The detection bracket equipped with the laser coaxial displacement meter is installed on the optical element structure; the laser coaxial displacement meter is used to measure the installation height deviation of the two optical elements relative to the corresponding optical element structure. Install the testing bracket on the tooling assembly surface of the testing reference fixture, and install two laser coaxial displacement gauges on the corresponding sensor second mounting surface of the testing reference fixture; use the laser coaxial displacement gauges to measure the bracket calibration reference surface corresponding to the testing bracket, and calibrate the zero point of the height processing error of the pressing surface corresponding to the pressure block measured by the laser coaxial displacement gauges according to the measurement results; Install the pressure block on the inspection reference fixture; use two laser coaxial displacement gauges to measure the machining error corresponding to the two pressing surfaces of the pressure block; Based on two installation height deviation values ​​and two processing error values, obtain the fitting dimensions corresponding to the pressing surface and mounting surface of the pressure block, and fit the pressure block according to the fitting dimensions; The repaired pressure block is installed on the optical element structure.

4. The digital assembly method for pressing multiple planar optical element blocks according to claim 3, characterized in that, The steps to obtain the fitting dimensions corresponding to the pressing surface and mounting surface of the pressure block are as follows: The fit error between the two pressing surfaces of the pressure block and the corresponding optical element is calculated based on two installation height deviation values ​​and two processing error values. The fitting coefficient corresponding to the pressing surface of the pressing block is obtained based on the spatial angle between the surface of the optical element and the pressing block mounting surface of the optical element structure. Based on the magnitude of the two fit errors, determine the fit surface and fit amount of the briquette.

5. The digital assembly method for pressing multiple planar optical element blocks according to claim 3, characterized in that, The expression for the fit error between the two pressing surfaces and the corresponding optical elements is: ΔH1=Δh11+Δh12, ΔH2=Δh21+Δh22 In the formula, ΔH1 is the fitting error between the first pressing surface and the first optical element; ΔH2 is the fitting error between the second pressing surface and the second optical element; Δh11 is the installation height deviation of the first optical element relative to the optical element structure; Δh12 is the installation height deviation of the second optical element relative to the optical element structure; Δh21 is the processing error of the first pressing surface of the pressing block; and Δh22 is the processing error of the second pressing surface of the pressing block. The expression for the fitting coefficient corresponding to the pressing surface of the briquette is: D1= ,D2= In the formula, D1 represents the grinding coefficient of the first pressing surface of the pressing block; D2 represents the grinding coefficient of the second pressing surface of the pressing block; This indicates the spatial angle between the surface of the first optical element and the mounting surface of the pressure block of the optical element structure. This indicates the spatial angle between the surface of the second optical element and the mounting surface of the pressure block of the optical element structure.

6. The digital assembly method for pressing multiple planar optical element blocks according to claim 3, characterized in that, The steps for determining the fitting surface and fitting amount of the briquettes are as follows: If ΔH1≤0 and ΔH2≤0, then the first pressing surface fitting amount H1=-ΔH1 and the second pressing surface fitting amount H2=-ΔH2 of the pressing block corresponding to the first optical element. If ΔH1≤0 and ΔH2>0, then the fitting amount of the mounting surface of the clamping block H3=ΔH2 / D2, and the fitting amount of the first pressing surface of the clamping block corresponding to the first optical element H1=ΔH2. D1 / D2-ΔH1; If ΔH1>0 and ΔH2≤0, then the fitting amount of the mounting surface of the clamping block H3=ΔH1 / D1, and the fitting amount of the second pressing surface of the clamping block corresponding to the second optical element H2=ΔH1. D2 / D1-ΔH2; If ΔH1>0, ΔH2>0, and ΔH1 / D1≥ΔH2 / D2, then the fitting amount H3 of the mounting surface of the clamping block is ΔH1 / D1, and the fitting amount H2 of the second pressing surface of the clamping block corresponding to the second optical element is ΔH1. D2 / D1-ΔH2; If ΔH1 > 0, ΔH2 > 0, and ΔH1 / D1 < ΔH2 / D2, then the fitting amount of the mounting surface of the clamping block H3 = ΔH2 / D2, and the fitting amount of the first pressing surface of the clamping block corresponding to the first optical element H1 = ΔH2. D1 / D2-ΔH1.

7. The digital assembly method for pressing multiple planar optical element blocks according to claim 3, characterized in that, A rubber pad is placed on the pressing surface of the repaired pressure block, so that the rubber pad of the pressure block installed on the optical element structure presses the corresponding optical element tightly.

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