Method and device for calibrating spinning direction of dispersion prism

Abstract

The invention discloses a method and a device for calibrating the spinning direction of a dispersion prism. The method comprises the following steps: placing a dispersed prism, a plane mirror and a theodolite according to a measurement light path; the angles of the theodolite, the accurate measuring mirror and the plane mirror are adjusted, so that an auto-collimation image reflected by the plane mirror coincides with a cross wire in an eyepiece of the theodolite, and an initial angle is obtained; fitting the geometrical shapes of the rear surface, the front surface and the front end surface of the dispersion prism by using a plurality of points to obtain a first spherical surface, a second spherical surface and a first plane; fitting a second plane where the dispersion prism is located; based on the initial angle, adjusting the angles of the accurate measuring mirror, the theodolite and the plane mirror, so that an auto-collimation image returned by the plane mirror coincides with a cross wire of the theodolite; and measuring a target included angle between the second plane and the fourth plane, and taking the target included angle as a final calibration value of the spinning direction of the dispersion prism. According to the method, the reference of the spinning direction of the dispersion prism is led to the accurate measurement lens, so that the calibration precision of the spinning direction and the adjustment efficiency of the dispersion prism are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical instrument alignment, and particularly to a method and device for calibrating the spin direction of a dispersion prism. Background Art

[0002] A dispersion prism is a dispersion optical element that is widely used in off-axis multi-reflection optical systems. The processing reference surface of the dispersion prism is usually used to determine its precise position and direction in the optical system. However, once the dispersion prism is installed in the optical system, these reference surfaces may be blocked or not directly accessible, resulting in the inability to directly measure its position and direction. To ensure the correct installation and adjustment of the dispersion prism in the system, it is necessary to lead out the reference of its spin direction to a measurable position. Usually, this can be achieved by installing a precision measurement mirror (or other measurement auxiliary devices) outside the dispersion prism. The precision measurement mirror can serve as a reference for the spin direction of the dispersion prism, facilitating subsequent measurement and adjustment. By installing a precision measurement mirror outside the dispersion prism, the reference of the spin direction of the dispersion prism can be led out to a measurable position.

[0003] Currently, the installation and adjustment of the precision measurement mirror are usually manual operations, which are not only inefficient but also difficult to meet the requirements of high-precision adjustment. Summary of the Invention

[0004] The present invention aims to at least solve the technical problems existing in the prior art. To this end, a first aspect of the present invention proposes a method for calibrating the spin direction of a dispersion prism, characterized in that the method includes:

[0005] Placing the dispersion prism with a precision measurement mirror installed, a plane mirror, and a theodolite according to the positional relationship of the measurement optical path;

[0006] Adjusting the angles of the theodolite, the precision measurement mirror, and the plane mirror so that two autocollimation images returned by the precision measurement mirror and the plane mirror simultaneously appear in the field of view of the theodolite, and making the autocollimation image reflected by the plane mirror coincide with the crosshair in the eyepiece of the theodolite. At this time, read the pitch angle scale on the theodolite to obtain the initial angle;

[0007] Using the probe of a coordinate measuring machine to collect multiple points on the rear surface, front surface, and front end surface of the dispersion prism respectively, and using the multiple points on a computer to fit the geometric shapes of the rear surface, front surface, and front end surface of the dispersion prism to obtain a first spherical surface, a second spherical surface, and a first plane respectively;

[0008] Using the first spherical surface, the second spherical surface, and the first plane on the computer to fit the optical axes of the rear surface and the front surface of the dispersion prism, and fitting the second plane where the dispersion prism is located;

[0009] Based on the initial angle, adjust the angles of the fine measurement mirror, the theodolite, and the plane mirror so that the autocollimation image returned by the plane mirror coincides with the crosshair of the theodolite, ensuring that the perpendicularity between the reflecting surface of the plane mirror and the optical axis plane of the dispersion prism reaches a preset accuracy;

[0010] Fine-tune the position and pose of the fine measurement mirror. When ensuring that the optical axis of the fine measurement mirror is aligned with the optical axis of the theodolite, fix the fine measurement mirror;

[0011] Collect multiple points on the target surface of the fine measurement mirror to fit the fourth plane on the computer;

[0012] Measure the target angle between the second plane and the fourth plane, and use the target angle as the final calibration value of the spin direction of the dispersion prism.

[0013] Optionally, arranging the dispersion prism, the plane mirror, and the theodolite with the installed fine measurement mirror according to the positional relationship of the measurement optical path includes:

[0014] Install the dispersion prism with the installed fine measurement mirror on the base of the coordinate measuring machine through a support tooling; install the plane mirror on the base through a lifting frame;

[0015] Set up the theodolite on a two-dimensional adjustment frame; the two-dimensional adjustment frame is located beside the base;

[0016] Vertically place the mirror surface of the dispersion prism and the mirror surface of the plane mirror in space;

[0017] Adjust the centers of the dispersion prism, the plane mirror, and the theodolite to be on the same straight line.

[0018] Optionally, before installing the dispersion prism with the installed fine measurement mirror on the base of the coordinate measuring machine through a support tooling, it further includes:

[0019] Install the fine measurement mirror on the side of the dispersion prism frame through a fine measurement mirror adapter tooling;

[0020] Install a probe on the measuring head of the coordinate measuring machine and calibrate it.

[0021] Optionally, the fitting of the optical axes of the rear surface and the front surface of the dispersion prism and the fitting of the second plane where the dispersion prism is located on the computer by using the first spherical surface, the second spherical surface, and the first plane include:

[0022] On the computer, respectively fit the first perpendicular line segment from the first spherical surface to the first plane and the second perpendicular line segment from the second spherical surface to the first plane; the first perpendicular line segment is the optical axis of the rear surface, and the second perpendicular line segment is the optical axis of the front surface;

[0023] Fit the plane where the first vertical line segment and the second vertical line segment are located to obtain a second plane; the second plane is the plane where the optical axis of the dispersion prism is located.

[0024] Optionally, based on the initial angle, adjust the angles of the fine measurement mirror, the theodolite, and the plane mirror so that the autocollimation image returned by the plane mirror coincides with the crosshair of the theodolite, to ensure that the perpendicularity between the reflecting surface of the plane mirror and the optical axis plane of the dispersion prism reaches a preset accuracy, including:

[0025] Use the coordinate measuring machine to collect multiple points on the reflecting surface of the plane mirror, and fit a third plane using the multiple points; the third plane is the reflecting surface of the plane mirror;

[0026] Measure the included angle between the second plane and the third plane on the computer to obtain a second angle;

[0027] Calculate the third angle that the fine measurement mirror needs to be adjusted according to the second angle so that the second plane and the third plane are perpendicular;

[0028] Adjust the pitch angle of the theodolite to a fourth angle, and the fourth angle is the sum of the initial angle and the third angle;

[0029] Adjust the angle of the plane mirror so that the autocollimation image returned by the plane mirror coincides with the crosshair of the theodolite;

[0030] Collect multiple points on the reflecting surface of the plane mirror again, and fit the third plane again using the multiple points, and adjust the angles of the fine measurement mirror, the theodolite, and the plane mirror again so that the autocollimation image returned by the plane mirror coincides with the crosshair of the theodolite;

[0031] After multiple adjustments, when the third angle that the fine measurement mirror needs to be adjusted next time is less than or equal to the preset angle, it is determined that the perpendicularity between the reflecting surface of the plane mirror and the optical axis plane of the dispersion prism reaches the preset accuracy.

[0032] Optionally, when finely adjusting the position and orientation of the fine measurement mirror, when ensuring that the optical axis of the fine measurement mirror is aligned with the optical axis of the theodolite, fix the fine measurement mirror, including:

[0033] Adjust the position and orientation of the fine measurement mirror so that the autocollimation image reflected by the fine measurement mirror coincides with the crosshair to ensure that the optical axis of the fine measurement mirror is aligned with the optical axis of the theodolite;

[0034] Fix the fine measurement mirror, and during the process of fixing the fine measurement mirror, continuously monitor the alignment state of the autocollimation image in the theodolite and the crosshair, ensuring that the autocollimation image and the crosshair always coincide.

[0035] The second aspect of the present invention proposes a calibration device for the spin direction of a dispersion prism. The device includes: a coordinate measuring machine, a dispersion prism assembly, a plane mirror, a lifting frame, an air-bearing platform, a theodolite, a two-dimensional adjustment frame, and a support tooling;

[0036] The coordinate measuring machine can adjust the position of a probe mounted on the coordinate measuring machine in the X, Y, and Z directions. The probe is used to collect the coordinates of points on the surface of the dispersion prism;

[0037] The plane mirror is mounted on the lifting frame, the dispersion prism assembly is mounted on the support tooling, and the lifting frame and the support tooling are mounted on the base of the coordinate measuring machine; the coordinate measuring machine is mounted on the air-bearing platform; the theodolite is mounted on the two-dimensional adjustment frame;

[0038] The lifting frame, the support tooling, and the two-dimensional adjustment frame are respectively used to fix and adjust the poses of the plane mirror, the dispersion prism, and the theodolite;

[0039] The dispersion prism assembly includes a dispersion prism and a fine measurement mirror. The dispersion prism is used to decompose incident light into spectra of different wavelengths, and the fine measurement mirror is used to calibrate the output spectrum of the dispersion prism.

[0040] Optionally, the coordinate measuring machine includes an X-direction translation component, a Y-direction translation component, a Z-direction lifting component, a probe, and a base;

[0041] The Y-direction translation component is slidably connected to the base and is perpendicular to the base; the X-direction translation component is fixedly connected to the Y-direction translation component and is perpendicular to the Y-direction translation component; the Z-direction lifting component is slidably connected to the X-direction translation component and is perpendicular to the X-direction translation component;

[0042] The probe is mounted at the bottom end of the Z-direction lifting component.

[0043] Optionally, the dispersion prism assembly further includes a dispersion prism frame, a dispersion prism bonding ring, and a fine measurement mirror adapter tooling;

[0044] The dispersion prism frame is used to fix and support the dispersion prism through the dispersion prism bonding ring, and the fine measurement mirror is mounted on the side of the dispersion prism frame through the fine measurement mirror adapter tooling.

[0045] The present invention has the following beneficial effects:

[0046] The calibration method for the spin direction of a dispersion prism provided by an embodiment of the present invention arranges the dispersion prism with a fine measurement mirror installed, a plane mirror, and a theodolite according to the positional relationship of the measurement optical path; adjusts the angles of the theodolite, the fine measurement mirror, and the plane mirror so that two autocollimation images returned by the fine measurement mirror and the plane mirror simultaneously appear in the field of view of the theodolite, and makes the autocollimation image reflected by the plane mirror coincide with the crosshair in the eyepiece of the theodolite. At this time, read the pitch angle scale on the theodolite to obtain the initial angle; use the probe of a coordinate measuring machine to collect multiple points on the rear surface, front surface, and front end surface of the dispersion prism respectively, and use these multiple points on a computer to fit the geometric shapes of the rear surface, front surface, and front end surface of the dispersion prism to obtain a first spherical surface, a second spherical surface, and a first plane respectively; use the first spherical surface, the second spherical surface, and the first plane on the computer to fit the optical axes of the rear surface and the front surface of the dispersion prism, and fit the second plane where the dispersion prism is located; based on the initial angle, adjust the angles of the fine measurement mirror, the theodolite, and the plane mirror so that the autocollimation image returned by the plane mirror coincides with the crosshair of the theodolite to ensure that the perpendicularity between the reflecting surface of the plane mirror and the optical axis plane of the dispersion prism reaches a preset accuracy; finely adjust the position and pose of the fine measurement mirror. When ensuring that the optical axis of the fine measurement mirror is aligned with the optical axis of the theodolite, fix the fine measurement mirror; collect multiple points on the target surface of the fine measurement mirror to fit a fourth plane on the computer; measure the target angle between the second plane and the fourth plane, and use the target angle as the final calibration value of the spin direction of the dispersion prism. The above method can use a computer to fit the optical axis and the plane during the manual adjustment process, lead the reference of the spin direction of the dispersion prism to the fine measurement mirror, provide a reference for the high-precision integration of the dispersion prism in the spin direction, and improve the calibration accuracy of the spin direction and the assembly and adjustment efficiency of the dispersion prism. Description of the Drawings

[0047] Figure 1 It is a mechanical structure diagram of a calibration device for the spin direction of a dispersion prism provided by an embodiment of the present invention;

[0048] Figure 2 It is a front view of a dispersion prism provided by an embodiment of the present invention;

[0049] Figure 3 It is a cross-sectional view of a dispersion prism assembly provided by an embodiment of the present invention;

[0050] Figure 4 It is a step flow chart of a calibration method for the spin direction of a dispersion prism provided by an embodiment of the present invention.

[0051] Description of the Reference Numerals:

[0052] 1 - Coordinate measuring machine; 11 - X - direction translation component; 12 - Z - direction lifting component; 13 - Probe; 14 - Y - direction translation component; 15 - Base; 2 - Dispersion prism assembly; 21 - Dispersion prism; 211 - Front surface of the dispersion prism; 212 - Rear surface of the dispersion prism; 213 - Front end face of the dispersion prism; 22 - Dispersion prism frame; 23 - Dispersion prism bonding ring; 24 - Precision measuring mirror; 25 - Precision measuring mirror adapter tooling; 3 - Plane mirror; 4 - Lifting frame; 5 - Air - floating platform; 6 - Theodolite; 7 - Two - dimensional adjustment frame; 8 - Support tooling. Detailed implementation mode

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0054] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present disclosure, unless otherwise stated, the meaning of "a plurality" is two or more. Additionally, the use of "based on" or "according to" means open and inclusive because a process, step, calculation, or other action "based on" or "according to" one or more of the stated conditions or values may in practice be based on additional conditions or values beyond those stated.

[0055] Figure 1 It is a mechanical structure diagram of a calibration device for the spin direction of the dispersion prism 21 provided by the embodiment of the present invention.

[0056] As Figure 1 shown, the device includes: a coordinate measuring machine 1, a dispersion prism assembly 22, a plane mirror 3, a lifting frame 4, an air - floating platform 5, a theodolite 6, a two - dimensional adjustment frame 7, and a support tooling 8.

[0057] Among them, the coordinate measuring machine 1 can adjust the position of the probe 13 installed on the coordinate measuring machine 1 in the X, Y, and Z directions. The probe 13 is used to collect the coordinates of the points on the surface of the dispersion prism 21.

[0058] The plane mirror 3 is installed on the lifting frame 4, and the dispersion prism assembly 22 is installed on the support tooling 8. The lifting frame 4 and the support tooling 8 are installed on the base table 15 of the coordinate measuring machine 1; the coordinate measuring machine 1 is installed on the air-bearing platform 5; the theodolite 6 is mounted on the two-dimensional adjustment frame 7; the lifting frame 4, the support tooling 8, and the two-dimensional adjustment frame 7 are respectively used to fix and adjust the positions and postures of the plane mirror 3, the dispersion prism 21, and the theodolite 6.

[0059] The dispersion prism assembly 22 includes a dispersion prism 21 and a fine measurement mirror 24. The dispersion prism 21 is used to decompose the incident light into spectra of different wavelengths, and the fine measurement mirror 24 is used to calibrate the output spectrum of the dispersion prism 21.

[0060] Specifically, the coordinate measuring machine 1 is a high-precision measuring device that can move the probe 13 in the X, Y, and Z directions to collect the coordinate data of the surface points of the dispersion prism 21.

[0061] The plane mirror 3 is used to reflect light and is installed on the lifting frame 4 as part of the reference optical path.

[0062] The lifting frame 4 is used to fix and adjust the height and angle of the plane mirror 3 to ensure the alignment of the optical path.

[0063] The air-bearing platform 5 is a high-precision support platform that reduces vibration and friction through air cushions to ensure the stability of the measurement environment.

[0064] The coordinate measuring machine 1 is installed on the air-bearing platform 5 to reduce the influence of vibration and friction on the measurement accuracy. The theodolite 6 is an optical instrument for measuring angles and is used to observe and calibrate the optical path.

[0065] The two-dimensional adjustment frame 7 is used to fix and adjust the position and angle of the theodolite 6 to ensure its alignment with the optical path.

[0066] The support tooling 8 is used to fix the dispersion prism assembly 22 to ensure its stability during the measurement process.

[0067] As an optional embodiment, the coordinate measuring machine 1 includes an X-axis translation assembly 11, a Y-axis translation assembly 14, a Z-axis lifting assembly 12, a probe 13, and a base table 15; the Y-axis translation assembly 14 is slidably connected to the base table 15 and is perpendicular to the base table 15; the X-axis translation assembly 11 is fixedly connected to the Y-axis translation assembly 14 and is perpendicular to the Y-axis translation assembly 14; the Z-axis lifting assembly 12 is slidably connected to the X-axis translation assembly 11 and is perpendicular to the X-axis translation assembly 11; the probe 13 is installed at the bottom end of the Z-axis lifting assembly 12.

[0068] Specifically, the X-axis translation assembly 11 is responsible for moving the probe 13 in the X-axis direction (usually the horizontal direction).

[0069] The Y-direction translation component 14 is responsible for the movement of the probe 13 in the Y-axis direction (usually the horizontal direction perpendicular to the X-axis). The Z-direction lifting component 1213 is responsible for the movement of the probe 13 in the Z-axis direction (usually the vertical direction).

[0070] As shown in Figure 1 the figure, the Y-direction translation component 14 is connected to the base table 15 through a guide rail or a slider and can slide in the Y-axis direction. The X-direction translation component 11 is installed on the Y-direction translation component 14 and moves together with the Y-direction translation component 14. The Z-direction lifting component 12 is connected to the X-direction translation component 11 through a guide rail or a slider and can slide in the Z-axis direction.

[0071] The probe 13 is installed at the bottom end of the Z-direction lifting component 12 and is used to contact or scan the surface of the object to be measured and collect the coordinate data of the points.

[0072] The base table 15 is the basic platform of the three-coordinate measuring machine 1 and is used to support the entire device. It is usually made of high-rigidity materials such as granite, marble, or aluminum alloy to ensure stability.

[0073] As an alternative embodiment, the dispersion prism assembly 22 further includes a dispersion prism frame 22, a dispersion prism 21 bonding ring 23, a fine measurement mirror 24, and a fine measurement mirror 24 adapter tooling 25. The dispersion prism frame 22 is used to fix and support the dispersion prism 21 through the dispersion prism 21 bonding ring 23, and the fine measurement mirror 24 is installed on the side of the dispersion prism frame 22 through the fine measurement mirror 24 adapter tooling 25.

[0074] Figure 2 is the front view of a dispersion prism 21 provided by an embodiment of the present invention.

[0075] Figure 3 is the cross-sectional view of a dispersion prism assembly 22 provided by an embodiment of the present invention.

[0076] As shown in Figure 2 the figure, the dispersion prism assembly 22 includes a dispersion prism frame 22, a dispersion prism 21 bonding ring 23, a fine measurement mirror 24, and a fine measurement mirror 24 adapter tooling 25. The dispersion prism assembly 22 is installed on the support tooling 8.

[0077] As shown in Figure 3 the figure, the dispersion prism 21 includes a front surface 211, a rear surface 212, and a front end surface 213.

[0078] The dispersion prism 21 is the core optical element of the dispersion prism assembly 22 and is used to decompose the incident light into spectra of different wavelengths. The dispersion prism frame 22 is a mechanical structure for fixing and supporting the dispersion prism 21 and is usually made of metal or high-strength plastic to ensure the stability and durability of the structure.

[0079] The dispersion prism 21 bonding ring 23 is used to fix the dispersion prism 21 within the spectacle frame 22. It is typically made of an elastic material (such as rubber or silicone) and can provide buffering between the prism and the spectacle frame 22, preventing stress concentration caused by temperature changes or mechanical vibrations.

[0080] The precision measurement mirror 24 is used to calibrate the output spectrum of the dispersion prism 21, ensuring the accuracy and consistency of the spectrum.

[0081] The precision measurement mirror 24 adapter tooling 25 is used to mount the precision measurement mirror 24 on the side of the dispersion prism spectacle frame 22. The adapter tooling 25 typically includes a fine adjustment mechanism that allows the precision measurement mirror 24 to be precisely positioned in multiple dimensions to ensure its alignment with the optical path of the dispersion prism 21.

[0082] In summary, the calibration device for the spin direction of the dispersion prism provided in the embodiment of the present invention includes: a coordinate measuring machine, a dispersion prism assembly, a plane mirror, a lifting frame, an air-bearing platform, a theodolite, a two-dimensional adjustment frame, and a support tooling; the coordinate measuring machine can adjust the position of a probe mounted on the coordinate measuring machine in the X, Y, and Z directions, and the probe is used to collect the coordinates of points on the surface of the dispersion prism; the plane mirror is mounted on the lifting frame, the dispersion prism assembly is mounted on the support tooling, and the lifting frame and the support tooling are mounted on the base of the coordinate measuring machine; the coordinate measuring machine is mounted on the air-bearing platform; the theodolite is mounted on the two-dimensional adjustment frame; the lifting frame, the support tooling, and the two-dimensional adjustment frame are respectively used to fix and adjust the poses of the plane mirror, the dispersion prism, and the theodolite; the dispersion prism assembly includes a dispersion prism and a precision measurement mirror, the dispersion prism is used to decompose incident light into spectra of different wavelengths, and the precision measurement mirror is used to calibrate the output spectrum of the dispersion prism. The above device can use the coordinate measuring machine to collect points on multiple surfaces of the dispersion prism and fit out the optical axis plane. During the process, the theodolite and the plane mirror are used to assist in installing the precision measurement mirror, and the angle of the precision measurement mirror is adjusted through multiple groups of measurements, thereby leading the reference of the spin direction of the dispersion prism to the precision measurement mirror, which can provide a reference for the spin direction for the high-precision integration of the dispersion prism, improving the calibration accuracy of the spin direction and the assembly and adjustment efficiency of the dispersion prism.

[0083] Figure 4 is the step flowchart of a method for calibrating the spin direction of a dispersion prism provided in the embodiment of the present invention. This method is applied to Figure 1 the calibration device for the spin direction of the dispersion prism in Figure 4 as shown, and this method includes the following steps:

[0084] Step 101, arrange the dispersion prism with the precision measurement mirror already installed, the plane mirror, and the theodolite according to the positional relationship of the measurement optical path.

[0085] This step is for preparatory work to ensure that all optical elements (dispersion prism, plane mirror, theodolite) are arranged according to the predetermined optical path.

[0086] Among them, the dispersion prism is the object to be measured, which is used to decompose the incident light into spectra of different wavelengths.

[0087] The fine measurement mirror is used to calibrate the output spectrum of the dispersion prism to ensure the accuracy and consistency of the spectrum. The plane mirror is used to reflect light, and the theodolite is an optical instrument used to measure angles and is used to observe and calibrate the optical path.

[0088] Step 102: Adjust the angles of the theodolite, the fine measurement mirror, and the plane mirror so that two autocollimation images returned by the fine measurement mirror and the plane mirror appear simultaneously in the field of view of the theodolite, and make the autocollimation image reflected by the plane mirror coincide with the crosshair in the eyepiece of the theodolite. At this time, read the pitch angle scale on the theodolite to obtain the initial angle.

[0089] By adjusting the angle, ensure that the theodolite can see the reflected images of the fine measurement mirror and the plane mirror simultaneously. The coincidence of the reflected image of the plane mirror with the crosshair indicates that the reflecting surface of the plane mirror is aligned with the optical axis of the theodolite. The pitch angle scale recorded at this time serves as the basis for subsequent adjustments.

[0090] Step 103: Use the probe of the coordinate measuring machine to collect multiple points on the rear surface, front surface, and front end face of the dispersion prism respectively, and use these multiple points on the computer to fit the geometric shapes of the rear surface, front surface, and front end face of the dispersion prism to obtain the first spherical surface, the second spherical surface, and the first plane respectively.

[0091] The coordinate measuring machine is used to accurately measure the surface shape of the dispersion prism. By collecting multiple points, the computer can fit the geometric shape of the dispersion prism, including the rear surface (the first spherical surface), the front surface (the second spherical surface), and the front end face (the first plane).

[0092] Step 104: Use the first spherical surface, the second spherical surface, and the first plane on the computer to fit the optical axes of the rear surface and the front surface of the dispersion prism, and fit the second plane where the dispersion prism is located.

[0093] Based on the geometric shapes obtained by fitting, the computer can further fit the optical axis of the dispersion prism (i.e., the symmetry axis of the front and rear surfaces) and the plane where the dispersion prism is located (the second plane).

[0094] Step 105: Based on the initial angle, adjust the angles of the fine measurement mirror, the theodolite, and the plane mirror so that the autocollimation image returned by the plane mirror coincides with the crosshair of the theodolite to ensure that the perpendicularity between the reflecting surface of the plane mirror and the optical axis plane of the dispersion prism reaches the preset accuracy.

[0095] By adjusting the angle, ensure that the reflecting surface of the plane mirror is perpendicular to the optical axis plane of the dispersion prism. This step is to ensure the accuracy of subsequent measurements.

[0096] Step 106: Fine-tune the position and pose of the precise measurement mirror. When ensuring that the optical axis of the precise measurement mirror is aligned with the optical axis of the theodolite, fix the precise measurement mirror.

[0097] The optical axis of the precise measurement mirror needs to be strictly aligned with the optical axis of the theodolite to ensure the accuracy of the measurement. Adjust the position and pose of the precise measurement mirror. After adjustment, fix the precise measurement mirror to prevent its position from changing.

[0098] Step 107: Collect multiple points on the target surface of the precise measurement mirror to fit a fourth plane on the computer.

[0099] By collecting multiple points on the target surface of the precise measurement mirror, the computer can fit a fourth plane, and this plane is related to the optical axis of the precise measurement mirror.

[0100] Step 108: Measure the target angle between the second plane and the fourth plane, and use the target angle as the final calibration value of the spin direction of the dispersion prism.

[0101] By measuring the angle between the second plane (the plane where the dispersion prism is located) and the fourth plane (the target surface of the precise measurement mirror), the final calibration value of the spin direction of the dispersion prism can be obtained. This angle reflects the spin direction of the dispersion prism.

[0102] Record the target angle as γ, and use the value of γ as the final calibration value of the spin direction of the dispersion prism for record keeping.

[0103] In summary, for the calibration method of the spin direction of the dispersion prism provided in the embodiments of the present invention, the dispersion prism with a precisely measured mirror installed, the flat mirror, and the theodolite are arranged according to the positional relationship of the measurement optical path; the angles of the theodolite, the precisely measured mirror, and the flat mirror are adjusted so that two autocollimation images returned by the precisely measured mirror and the flat mirror appear simultaneously in the field of view of the theodolite, and the autocollimation image reflected by the flat mirror coincides with the crosshair in the eyepiece of the theodolite. At this time, the pitch angle scale on the theodolite is read to obtain the initial angle; the probe of the coordinate measuring machine is used to collect multiple points on the rear surface, front surface, and front end surface of the dispersion prism respectively, and the geometric shapes of the rear surface, front surface, and front end surface of the dispersion prism are fitted on a computer to obtain the first spherical surface, the second spherical surface, and the first plane respectively; on the computer, the optical axes of the rear surface and the front surface of the dispersion prism are fitted using the first spherical surface, the second spherical surface, and the first plane, and the second plane where the dispersion prism is located is fitted; based on the initial angle, the angles of the precisely measured mirror, the theodolite, and the flat mirror are adjusted so that the autocollimation image returned by the flat mirror coincides with the crosshair of the theodolite to ensure that the perpendicularity between the reflecting surface of the flat mirror and the optical axis plane of the dispersion prism reaches a preset accuracy; the position and pose of the precisely measured mirror are finely adjusted. When it is ensured that the optical axis of the precisely measured mirror is aligned with the optical axis of the theodolite, the precisely measured mirror is fixed; multiple points are collected on the target surface of the precisely measured mirror to fit the fourth plane on the computer; the target angle between the second plane and the fourth plane is measured, and the target angle is used as the final calibration value of the spin direction of the dispersion prism. In the above method, the optical axis and the plane are fitted using a computer during the manual adjustment process, so that the reference of the spin direction of the dispersion prism can be led out to the precisely measured mirror, which can provide a reference for the high-precision integration of the dispersion prism in the spin direction, improving the calibration accuracy of the spin direction and the assembly and adjustment efficiency of the dispersion prism.

[0104] As an optional embodiment, in step 101, arranging the dispersion prism with a precisely measured mirror installed, the flat mirror, and the theodolite according to the positional relationship of the measurement optical path specifically includes:

[0105] Step 1011: Install the dispersion prism with a precisely measured mirror installed on the base of the coordinate measuring machine through a support tooling; install the flat mirror on the base through a lifting frame.

[0106] The dispersion prism is an optical element to be measured, and its surface shape and optical axis direction need to be accurately measured. As Figure 1 shown, the dispersion prism is fixed on the base through a support tooling to ensure its stable position.

[0107] The flat mirror is used to reflect light and assist in aligning the measurement optical path. Installed through a lifting frame, it is convenient to adjust its height and angle subsequently.

[0108] The base of the coordinate measuring machine provides a stable reference platform. The lifting frame and the supporting tooling are directly installed on the base to ensure the accurate positional relationship of all optical elements.

[0109] Step 1012: Set up the theodolite on the two-dimensional adjustment frame; the two-dimensional adjustment frame is located beside the base.

[0110] The theodolite is an optical instrument used for measuring angles and is used to observe and record the reflection images of the precision mirror and the plane mirror. The two-dimensional adjustment frame allows the theodolite to be finely adjusted in the horizontal and vertical directions to ensure that its optical axis can be aligned with the optical paths of the dispersion prism and the plane mirror.

[0111] The position of the theodolite needs to be at a certain distance from the dispersion prism and the plane mirror. As Figure 1 shown, place the two-dimensional adjustment frame beside the base to facilitate the observation and adjustment of the optical path.

[0112] Step 1013: Vertically place the mirror surface of the dispersion prism and the mirror surface of the plane mirror in space.

[0113] The mirror surface of the dispersion prism and the mirror surface of the plane mirror need to be perpendicular to each other in space. This means that the normal directions (i.e., the vertical directions of the mirror surfaces) of the two are perpendicular to each other.

[0114] This perpendicular relationship is to ensure that the optical path can be correctly reflected and propagated, facilitating the subsequent observation of the autocollimation image through the theodolite.

[0115] Step 1014: Adjust the centers of the dispersion prism, the plane mirror, and the theodolite to be on the same straight line.

[0116] The centers of the dispersion prism, the plane mirror, and the theodolite need to be located on the same straight line. This straight line is the main axis of the optical path. This can ensure that the main axis of the optical path passes through the centers of all optical elements, avoiding the deviation or inclination of the optical path.

[0117] At the same time, ensure that the theodolite can observe the reflection images of the dispersion prism and the plane mirror simultaneously, facilitating subsequent angle measurement and adjustment.

[0118] Steps 1011 - 1014 ensure that the positional relationships of the dispersion prism, the plane mirror, and the theodolite meet the measurement requirements by building an accurate optical measurement system. Specifically, it includes fixing the positions of the dispersion prism and the plane mirror, setting up the theodolite and ensuring its adjustability, adjusting the spatial perpendicular relationship of the mirror surfaces to ensure the correct optical path, and adjusting the centers of all optical elements to be collinear to ensure that the main axis of the optical path passes through the centers of all elements. These operations lay the foundation for subsequent precise measurement and adjustment, ensuring the accuracy and reliability of the entire measurement process.

[0119] As an alternative embodiment, before installing the dispersion prism with the fine measurement mirror on the base of the coordinate measuring machine through the support tooling in step 101, it further includes:

[0120] Step 201: Install the fine measurement mirror on the side of the dispersion prism frame through the fine measurement mirror adapter tooling.

[0121] As Figure 1 shown, the fine measurement mirror is installed on the side of the dispersion prism frame through the fine measurement mirror adapter tooling.

[0122] The fine measurement mirror is installed on the side of the dispersion prism frame to facilitate subsequent observation of the reflection image of the fine measurement mirror through the theodolite 6, and at the same time does not affect the main optical path of the dispersion prism.

[0123] Step 202: Install and calibrate a probe on the measuring head of the coordinate measuring machine.

[0124] A coordinate measuring machine is a high-precision measuring device used to measure the geometric shape and position of an object. It contacts the surface of the object through a probe to collect coordinate data of points.

[0125] The probe is a measuring component of the coordinate measuring machine, used to contact the surface of the object to be measured and collect the coordinates of points. The accuracy of the probe directly affects the accuracy of the measurement result.

[0126] Install the probe on the measuring head of the coordinate measuring machine to ensure that it is firmly fixed and in the correct position.

[0127] Probe calibration is to eliminate the installation error and systematic error of the probe to ensure the accuracy of the measurement result. Calibration usually includes the following steps: (1) Use a standard calibration ball or calibration block as a reference. (2) Let the probe contact multiple points of the calibration ball and collect data. (3) Calculate the geometric parameters of the probe (such as probe radius, position deviation, etc.) through software and perform compensation.

[0128] Steps 201 - 202 provide a necessary basis for subsequent measurement and adjustment through these preparatory works, ensuring the accuracy and reliability of the entire measurement process.

[0129] As an alternative embodiment, in step 104, fitting the optical axes of the rear surface and the front surface of the dispersion prism and fitting the second plane where the dispersion prism is located on the computer using the first spherical surface, the second spherical surface, and the first plane includes:

[0130] Step 1041: On the computer, respectively fit the first perpendicular line segment from the first spherical surface to the first plane and the second perpendicular line segment from the second spherical surface to the first plane; the first perpendicular line segment is the optical axis of the rear surface, and the second perpendicular line segment is the optical axis of the front surface.

[0131] Specifically, the first spherical surface is the fitting result of the rear surface of the dispersion prism, representing the geometric shape of the rear surface. The second spherical surface is the fitting result of the front surface of the dispersion prism, representing the geometric shape of the front surface. The first plane is the fitting result of the front end face of the dispersion prism, representing the geometric shape of the front end face.

[0132] The first vertical line segment is the vertical line segment from the first spherical surface (rear surface) to the first plane (front end face). The direction of the first vertical line segment represents the optical axis direction of the rear surface.

[0133] The second vertical line segment is the vertical line segment from the second spherical surface (front surface) to the first plane (front end face). The direction of the second vertical line segment represents the optical axis direction of the front surface.

[0134] Step 1042: Fit the plane where the first vertical line segment and the second vertical line segment are located to obtain the second plane; the second plane is the plane where the optical axis of the dispersion prism is located.

[0135] The first vertical line segment and the second vertical line segment respectively represent the optical axis directions of the rear surface and the front surface of the dispersion prism. Through the directions of these two vertical line segments, the computer can fit a plane that contains these two vertical line segments.

[0136] The fitted plane is the second plane, which is the plane where the optical axis of the dispersion prism is located. This plane represents the spatial position and direction of the optical axis of the dispersion prism.

[0137] Steps 1041 - 1042 provide key spatial geometric information for subsequent precise adjustment and measurement by determining the second plane where the optical axis of the dispersion prism is located, ensuring that the optical axis direction and position of the dispersion prism can be accurately calibrated.

[0138] As an optional embodiment, in step 105, adjusting the angles of the fine measurement mirror, the theodolite, and the plane mirror based on the initial angle so that the autocollimation image returned by the plane mirror coincides with the crosshair of the theodolite to ensure that the perpendicularity between the reflecting surface of the plane mirror and the optical axis plane of the dispersion prism reaches the preset accuracy includes:

[0139] Step 1051: Use the coordinate measuring machine to collect multiple points on the reflecting surface of the plane mirror, and fit the third plane using the multiple points; the third plane is the reflecting surface of the plane mirror.

[0140] The probe of the coordinate measuring machine touches the reflecting surface of the plane mirror to collect the coordinate data of multiple points. Using the collected point data, the computer calculates the geometric plane of the reflecting surface of the plane mirror, that is, the third plane, through a fitting algorithm.

[0141] Step 1052: Measure the angle between the second plane and the third plane on the computer to obtain a second angle.

[0142] The second angle is the angle between the second plane and the third plane, denoted as β1, representing the deviation between the reflecting surface of the flat mirror and the optical axis plane of the dispersion prism.

[0143] Step 1053: Calculate the third angle that the fine measurement mirror needs to be adjusted according to the second angle, so that the second plane and the third plane are perpendicular.

[0144] The third angle is the angle that the fine measurement mirror needs to be adjusted so that the second plane and the third plane are perpendicular. The third angle is denoted as δ, and δ = 90° - β1.

[0145] By calculating the adjustment angle, it provides a basis for subsequent adjustment of the angles of the fine measurement mirror and the flat mirror.

[0146] Step 1054: Adjust the pitch angle of the theodolite to a fourth angle, and the fourth angle is the sum of the initial angle and the third angle.

[0147] Among them, the initial angle is the initial pitch angle of the theodolite recorded in step 102.

[0148] The third angle is the angle that the fine measurement mirror needs to be adjusted so that the second plane and the third plane are perpendicular.

[0149] Adjust the pitch angle of the theodolite to the fourth angle to ensure that the reflecting surface of the flat mirror is perpendicular to the optical axis plane of the dispersion prism. The fourth angle is denoted as α2, and α2 = α1 + δ.

[0150] Step 1055: Adjust the angle of the flat mirror so that the autocollimation image returned by the flat mirror coincides with the crosshair of the theodolite.

[0151] The autocollimation image is the image formed by the light reflected by the flat mirror in the theodolite. The crosshair is a reference mark in the eyepiece of the theodolite for alignment.

[0152] By finely adjusting the angle of the flat mirror so that the reflected autocollimation image coincides with the crosshair, it can align the reflecting surface of the flat mirror with the optical axis of the theodolite to ensure that the reflecting surface of the flat mirror is perpendicular to the optical axis plane of the dispersion prism.

[0153] Step 1056: Collect multiple points on the reflecting surface of the flat mirror again, and use the multiple points to fit the third plane again, and readjust the angles of the fine measurement mirror, the theodolite, and the flat mirror so that the autocollimation image returned by the flat mirror coincides with the crosshair of the theodolite.

[0154] By recollecting point data, update the geometric plane of the plane mirror reflecting surface. According to the new fitting result, further fine-tune the angles of the fine measurement mirror, the theodolite, and the plane mirror to ensure the alignment accuracy.

[0155] Through iterative adjustment, the perpendicularity between the plane mirror reflecting surface and the optical axis plane of the dispersion prism can be gradually improved.

[0156] Step 1057: After multiple adjustments, when the third angle that needs to be adjusted for the fine measurement mirror next time is less than or equal to the preset angle, it is determined that the perpendicularity between the reflecting surface of the plane mirror and the optical axis plane of the dispersion prism reaches the preset accuracy.

[0157] The preset angle is a preset accuracy threshold, representing the maximum allowable adjustment angle. The preset angle can be set according to actual needs. For example, it can be set to: ±5″.

[0158] If the angle that needs to be adjusted for the fine measurement mirror is less than or equal to the preset angle, it indicates that the perpendicularity has met the requirements.

[0159] Through multiple iterative adjustments, ensure that the perpendicularity between the plane mirror reflecting surface and the optical axis plane of the dispersion prism meets the high-precision requirements.

[0160] Steps 1051 - 1057 ensure that the perpendicularity between the plane mirror reflecting surface and the optical axis plane of the dispersion prism meets the requirements through iterative adjustment and high-precision measurement, providing a reliable reference for subsequent measurements.

[0161] As an alternative embodiment, when finely adjusting the position and pose of the fine measurement mirror in step 106, when ensuring that the optical axis of the fine measurement mirror is aligned with the optical axis of the theodolite, fixing the fine measurement mirror includes:

[0162] Step 1061: Adjust the position and pose of the fine measurement mirror so that the autocollimation image reflected by the fine measurement mirror coincides with the crosshair, to ensure that the optical axis of the fine measurement mirror is aligned with the optical axis of the theodolite.

[0163] By translating and rotating to finely adjust the position and pose of the fine measurement mirror, make the autocollimation image it reflects coincide with the crosshair. After coincidence, the optical axis of the fine measurement mirror is aligned with the optical axis of the theodolite, indicating that the optical paths of the two are completely consistent.

[0164] Step 1062: Fix the fine measurement mirror, and during the process of fixing the fine measurement mirror, continuously monitor the alignment state of the autocollimation image and the crosshair in the theodolite to ensure that the autocollimation image and the crosshair always remain coincident.

[0165] Fix the fine measurement mirror at the adjusted position and attitude by means of a fixture or a locking device to prevent the fine measurement mirror from moving. During the fixing process, slowly tighten the fixture or the locking device while observing the autocollimation image and the crosshair in the theodolite eyepiece. If it is found that the autocollimation image and the crosshair are offset, immediately stop the fixing and readjust the position and attitude of the fine measurement mirror. Ensure that the autocollimation image and the crosshair still coincide after complete fixing.

[0166] This process ensures that the optical axis of the fine measurement mirror is always aligned with the optical axis of the theodolite during the fixing process, avoiding introducing errors due to the fixing operation.

[0167] Steps 1061 - 1062 ensure that the optical axis of the fine measurement mirror is strictly aligned with the optical axis of the theodolite through high-precision adjustment and real-time monitoring, providing a reliable reference for subsequent measurements.

[0168] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, storage, database, or other medium used in the various embodiments provided in the present application can include non-volatile and / or volatile memories. Non-volatile memories can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memories can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

[0169] After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily conceive of other embodiments of the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and embodiments are only to be considered exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0170] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A method for calibrating the spin direction of a dispersion prism, characterized in that: The method comprises: Place the dispersion prism, plane mirror and theodolite with the precision measuring mirror installed according to the position relationship of the measuring optical path; Adjust the angles of the theodolite, the precision measuring mirror and the plane mirror so that two autocollimation images returned by the precision measuring mirror and the plane mirror appear in the field of view of the theodolite at the same time, and the autocollimation image reflected by the plane mirror coincides with the crosshairs in the eyepiece of the theodolite. At this time, read the pitch angle scale on the theodolite to obtain the initial angle; Using a probe of a three-dimensional coordinate measuring machine to collect a plurality of points on the rear surface, the front surface, and the front end surface of the dispersion prism, respectively, and using the plurality of points to fit the geometric shapes of the rear surface, the front surface, and the front end surface of the dispersion prism on a computer to obtain a first spherical surface, a second spherical surface, and a first plane, respectively; Using the first spherical surface, the second spherical surface and the first plane on the computer, fit the optical axes of the rear surface and the front surface of the dispersion prism, and fit the second plane where the dispersion prism is located; Based on the initial angle, adjusting the angles of the precision measuring mirror, the theodolite and the plane mirror so that the autocollimation image returned by the plane mirror coincides with the crosshairs of the theodolite, so as to ensure that the perpendicularity between the reflection surface of the plane mirror and the optical axis plane of the dispersion prism reaches a preset accuracy; Fine-adjusting the position of the precision measuring mirror, and fixing the precision measuring mirror when ensuring that the optical axis of the precision measuring mirror is aligned with the optical axis of the theodolite; Collecting a plurality of points on the aimed surface of the precision measuring mirror to fit a fourth plane on the computer; A target angle between the second plane and the fourth plane is measured, and the target angle is used as a final calibration value of the spin direction of the dispersion prism.

2. The method according to claim 1, characterized in that The method of placing the dispersion prism, the plane mirror and theodolite installed with the precision measuring mirror according to the position relationship of the measuring optical path includes: The dispersion prism with the precision measuring mirror installed is installed on the bottom platform of the three-dimensional coordinate measuring machine through the supporting fixture; the plane mirror is installed on the bottom platform through the lifting frame; The theodolite is mounted on a two-dimensional adjustment frame; the two-dimensional adjustment frame is located beside the base; Placing the mirror surface of the dispersion prism and the mirror surface of the plane mirror vertically in space; The center of the dispersion prism, the center of the plane mirror and the center of the theodolite are adjusted to be in a straight line.

3. The method according to claim 1, characterized in that Before the dispersion prism with the precision measuring mirror installed is installed on the bottom table of the three-dimensional coordinate measuring machine through the supporting fixture, it also includes: Install the precision measuring mirror on the side of the dispersion prism frame through the precision measuring mirror adapter; Install the probe on the measuring head of the CMM and calibrate it.

4. The method according to claim 1, characterized in that: The method of fitting the optical axes of the rear surface and the front surface of the dispersion prism using the first spherical surface, the second spherical surface and the first plane on a computer, and fitting the second plane where the dispersion prism is located, comprises: Fitting a first vertical line segment from the first spherical surface to the first plane and a second vertical line segment from the second spherical surface to the first plane on a computer respectively; the first vertical line segment is the optical axis of the rear surface, and the second vertical line segment is the optical axis of the front surface; The plane where the first vertical line segment and the second vertical line segment are located is fitted to obtain a second plane; the second plane is the plane where the optical axis of the dispersion prism is located.

5. The method according to claim 1, characterized in that: The adjusting the angles of the precision measuring mirror, the theodolite and the plane mirror based on the initial angle so that the autocollimation image returned by the plane mirror coincides with the crosshairs of the theodolite to ensure that the verticality between the reflecting surface of the plane mirror and the optical axis plane of the dispersion prism reaches a preset accuracy includes: Using the three-dimensional measuring machine to collect multiple points on the reflection surface of the plane mirror, and using the multiple points to fit a third plane; the third plane is the reflection surface of the plane mirror; measuring the angle between the second plane and the third plane on the computer to obtain a second angle; Calculate a third angle that the precision measuring mirror needs to be adjusted according to the second angle so that the second plane and the third plane are perpendicular; Adjusting the pitch angle of the theodolite to a fourth angle, where the fourth angle is the sum of the initial angle and the third angle; Adjusting the angle of the plane mirror so that the autocollimation image returned by the plane mirror coincides with the crosshairs of the theodolite; Collecting multiple points on the reflection surface of the plane mirror again, and fitting the third plane again using the multiple points, and adjusting the angles of the precision measuring mirror, the theodolite, and the plane mirror again, so that the autocollimation image returned by the plane mirror coincides with the crosshairs of the theodolite; After multiple adjustments, when the third angle of the precision measuring mirror that needs to be adjusted next time is less than or equal to the preset angle, it is determined that the perpendicularity between the reflecting surface of the plane mirror and the optical axis plane of the dispersion prism reaches the preset accuracy.

6. The method according to claim 1, characterized in that The step of finely adjusting the position of the precision measuring mirror, and fixing the precision measuring mirror when ensuring that the optical axis of the precision measuring mirror is aligned with the optical axis of the theodolite, comprises: Adjusting the position and posture of the precision measuring mirror so that the autocollimation image reflected by the precision measuring mirror coincides with the crosshairs, so as to ensure that the optical axis of the precision measuring mirror is aligned with the optical axis of the theodolite; The precision measuring mirror is fixed, and in the process of fixing the precision measuring mirror, the alignment state of the autocollimation image in the theodolite and the crosshairs is continuously monitored to ensure that the autocollimation image and the crosshairs always remain coincident.

7. A device for calibrating the spin direction of a dispersion prism, characterized in that: The device comprises: a three-dimensional coordinate measuring machine, a dispersion prism assembly, a plane mirror, a lifting frame, an air-floating platform, a theodolite, a two-dimensional adjustment frame and a supporting tooling; The three-dimensional coordinate measuring machine can adjust the position of a probe installed on the three-dimensional coordinate measuring machine in three directions: X, Y, and Z. The probe is used to collect the coordinates of points on the surface of the dispersion prism; The plane mirror is installed on the lifting frame, the dispersion prism assembly is installed on the supporting fixture, the lifting frame and the supporting fixture are installed on the bottom platform of the three-dimensional coordinate measuring machine; the three-dimensional coordinate measuring machine is installed on the air-floating platform; the theodolite is installed on the two-dimensional adjustment frame; The lifting frame, the supporting fixture, and the two-dimensional adjustment frame are used to fix and adjust the posture of the plane mirror, the dispersion prism, and the theodolite respectively; The dispersion prism assembly comprises a dispersion prism and a precision measuring mirror. The dispersion prism is used to decompose incident light into spectra of different wavelengths, and the precision measuring mirror is used to calibrate the output spectrum of the dispersion prism.

8. The device according to claim 7, characterized in that The three-dimensional coordinate measuring machine includes an X-axis translation component, a Y-axis translation component, a Z-axis lifting component, a probe and a base; The Y-direction translation assembly is slidably connected to the base and is perpendicular to the base; the X-direction translation assembly is fixedly connected to the Y-direction translation assembly and is perpendicular to the Y-direction translation assembly; the Z-direction lifting assembly is slidably connected to the X-direction translation assembly and is perpendicular to the X-direction translation assembly; The probe is mounted at the bottom end of the Z-direction lifting assembly.

9. The device according to claim 8, characterized in that The dispersion prism assembly also includes a dispersion prism frame, a dispersion prism bonding ring, and a precision measuring mirror adapter tooling; The dispersion prism frame is used to fix and support the dispersion prism through the dispersion prism adhesive ring, and the precision measuring mirror is installed on the side of the dispersion prism frame through the precision measuring mirror adapter.

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