A method for aligning a focusing lens and a sampling grating

Abstract

The application provides a focusing lens and sampling grating axis calibration method, and relates to the optical technical field.The focusing lens and sampling gratter axis calibration method provided by the application comprises the following steps: installing front and rear axis calibration fork wire plates; installing a focusing element, and adjusting the focal length and pose of the focusing element according to the front and rear axis calibration fork wire plates; calibrating the axis of the focusing lens based on the focusing element; installing a collimating element, and calibrating the axis of the phase optical element and the shielding element based on the collimating element.The technical scheme provided by the application calibrates the axis of the focusing lens based on the focusing element, and calibrates the axis of the phase optical element and the shielding element based on the collimating element, so that the focusing ability of the focusing lens assembly is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical technology, in particular to a focusing lens and sampling grating axis calibration method. BACKGROUND

[0002] In a single-aperture focusing lens assembly, the optical lens includes a focusing lens, a phase optical element and a shield, and the position and pose of the focusing lens, the phase optical element and the shield affect the formation of the focal point when focusing in the optical path. Since the focusing lens, the phase optical element and the shield are not parallel to each other, there is a deviation between the actual installation and the theoretical position, which is not conducive to the focusing effect of the focusing lens. SUMMARY

[0003] The problem solved by the present application is that the focusing lens, the phase optical element and the shield deviate from the theoretical position, which affects the formation of the focal point and further affects the focusing.

[0004] To solve the above problems, the present application provides a focusing lens and sampling grating axis calibration method, comprising: installing a front axis fork plate and a rear axis fork plate; installing a focusing element, and adjusting the focal length and pose of the focusing element according to the front axis fork plate and the rear axis fork plate; based on the focusing element, the focusing lens is calibrated; installing a collimating element, and calibrating the phase optical element and the shield based on the collimating element.

[0005] The focusing lens and sampling grating axis calibration method of the present application calibrates the focusing lens through the focusing element, and calibrates the phase optical element and the shield through the collimating element, effectively improving the focusing ability of the focusing lens assembly.

[0006] Preferably, the front axis fork plate and the rear axis fork plate comprise: installing the front axis fork plate on the front side of the focusing lens assembly, installing the rear axis fork plate on the rear side of the focusing lens assembly, and making the center of the front axis fork plate and the center of the rear axis fork plate located on the theoretical optical axis.

[0007] The focusing lens and sampling grating axis calibration method of the present application sets the center of the front axis fork plate and the center of the rear axis fork plate on the theoretical optical axis, and then adjusts the focal length and pose of the focusing element according to the front axis fork plate and the rear axis fork plate, so that the optical axis of the focusing element is used as the optical reference of the focusing lens, thereby calibrating the focusing lens according to the focusing element, effectively improving the focusing ability of the focusing lens assembly.

[0008] Preferably, the adjusting the focal length and the pose of the focusing element according to the front fixed-axis crosshair plate and the rear fixed-axis crosshair plate comprises: adjusting the focal length of the focusing element to make the center crosshair of the front fixed-axis crosshair plate clearly imaged; and adjusting the pose of the focusing element to make the objective crosshair of the focusing element coincide with the center crosshair of the front fixed-axis crosshair plate.

[0009] The method for fixed-axis calibration of the focusing lens and the sampling grating adjusts the focal length and the pose of the focusing element through the front fixed-axis crosshair plate to realize preliminary adjustment of the focusing element, and then takes the optical axis of the focusing element as the optical reference of the focusing lens, so that the focusing lens is calibrated according to the focusing element, and the focusing ability of the focusing lens assembly is effectively improved.

[0010] Preferably, the adjusting the focal length and the pose of the focusing element according to the front fixed-axis crosshair plate and the rear fixed-axis crosshair plate further comprises: adjusting the focal length of the focusing element to make the center crosshair of the rear fixed-axis crosshair plate clearly imaged; and adjusting the pose of the focusing element to make the objective crosshair of the focusing element coincide with the center crosshair of the rear fixed-axis crosshair plate.

[0011] The method for fixed-axis calibration of the focusing lens and the sampling grating further adjusts the focal length and the pose of the focusing element through the rear fixed-axis crosshair plate, and then takes the optical axis of the focusing element as the optical reference of the focusing lens, so that the focusing lens is calibrated according to the focusing element, and the focusing ability of the focusing lens assembly is effectively improved.

[0012] Preferably, the fixed-axis calibration of the focusing lens according to the focusing element comprises: adjusting the focal length of the focusing element to make the crosshair at the center of the focusing lens clearly imaged.

[0013] The method for fixed-axis calibration of the focusing lens and the sampling grating adjusts the focal length of the focusing element to make the crosshair at the center of the focusing lens clearly imaged, so that the focusing ability of the focusing lens assembly is effectively improved.

[0014] Preferably, the fixed-axis calibration of the focusing lens according to the focusing element further comprises: adjusting the position of the focusing lens to make the crosshair at the center of the focusing lens coincide with the crosshair at the center of the objective lens of the focusing element.

[0015] The method for fixed-axis calibration of the focusing lens and the sampling grating adjusts the position of the focusing lens to make the crosshair at the center of the focusing lens coincide with the crosshair at the center of the objective lens of the focusing element to complete preliminary fixed-axis calibration of the focusing lens, and the focusing ability of the focusing lens assembly is effectively improved.

[0016] Preferably, the focusing lens and the sampling grating are further calibrated according to the focusing lens, and the calibration further comprises: adjusting the posture of the focusing lens so that the cross-shaped wire on the focusing lens objective lens coincides with the cross-shaped wire on the focusing lens objective lens after being reflected by the focusing lens; and fixing the focusing lens to achieve the calibration of the focusing lens.

[0017] The focusing lens and the sampling grating are further calibrated according to the focusing lens, and the calibration further comprises: adjusting the posture of the focusing lens so that the cross-shaped wire on the focusing lens objective lens coincides with the cross-shaped wire on the focusing lens objective lens after being reflected by the focusing lens; and fixing the focusing lens to achieve the calibration of the focusing lens.

[0018] Preferably, the focusing lens and the sampling grating are further calibrated according to the focusing lens, and the calibration further comprises: adjusting the posture of the focusing lens so that the cross-shaped wire on the focusing lens objective lens coincides with the cross-shaped wire on the focusing lens objective lens after being reflected by the focusing lens; and fixing the focusing lens to achieve the calibration of the focusing lens.

[0019] The focusing lens and the sampling grating are further calibrated according to the focusing lens, and the calibration further comprises: adjusting the posture of the focusing lens so that the cross-shaped wire on the focusing lens objective lens coincides with the cross-shaped wire on the focusing lens objective lens after being reflected by the focusing lens; and fixing the focusing lens to achieve the calibration of the focusing lens.

[0020] Preferably, the focusing lens and the sampling grating are further calibrated according to the focusing lens, and the calibration further comprises: adjusting the posture of the focusing lens so that the cross-shaped wire on the focusing lens objective lens coincides with the cross-shaped wire on the focusing lens objective lens after being reflected by the focusing lens; and fixing the focusing lens to achieve the calibration of the focusing lens.

[0021] The focusing lens and the sampling grating are further calibrated according to the focusing lens, and the calibration further comprises: adjusting the posture of the focusing lens so that the cross-shaped wire on the focusing lens objective lens coincides with the cross-shaped wire on the focusing lens objective lens after being reflected by the focusing lens; and fixing the focusing lens to achieve the calibration of the focusing lens.

[0022] Preferably, the focusing lens and the sampling grating are further calibrated according to the focusing lens, and the calibration further comprises: adjusting the posture of the focusing lens so that the cross-shaped wire on the focusing lens objective lens coincides with the cross-shaped wire on the focusing lens objective lens after being reflected by the focusing lens; and fixing the focusing lens to achieve the calibration of the focusing lens.

[0023] The focusing lens and the sampling grating are further calibrated according to the focusing lens, and the calibration further comprises: adjusting the posture of the focusing lens so that the cross-shaped wire on the focusing lens objective lens coincides with the cross-shaped wire on the focusing lens objective lens after being reflected by the focusing lens; and fixing the focusing lens to achieve the calibration of the focusing lens. Attached Figure Description

[0024] Figure 1 This is a flowchart of the axis-fixed calibration method for the focusing lens and sampling grating according to an embodiment of the present invention;

[0025] Figure 2 The principle of the fixed-axis calibration method for the focusing lens and sampling grating described in the embodiments of the present invention Figure 1 ;

[0026] Figure 3 The principle of the fixed-axis calibration method for the focusing lens and sampling grating described in the embodiments of the present invention Figure 2 .

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-Focusing lens assembly; 2-Front fixed-axis fork screw plate; 3-Collimator; 4-Focusing component; 5-First bracket; 6-Second bracket; 7-Rear fixed-axis fork screw plate; 8-First fixed-axis component; 9-Second fixed-axis component; 10-Shielding component; 11-Phase optical element; 12-Focusing lens. Detailed Implementation

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] It should be noted that the accompanying drawings of this invention include an XYZ coordinate system, in which the positive X direction represents "left", the negative X direction represents "right", the positive Y direction represents "front", the negative Y direction represents "back", the positive Z direction represents "up", and the negative Z direction represents "down".

[0031] like Figure 1 As shown, the present invention provides a method for calibrating the axis of a focusing lens and a sampling grating, comprising: installing a front axis-fixing crosshair plate 2 and a rear axis-fixing crosshair plate 7; installing a focusing component 4 and adjusting the focal length and pose of the focusing component 4 according to the front axis-fixing crosshair plate 2 and the rear axis-fixing crosshair plate 7; calibrating the axis of the focusing lens 12 based on the focusing component 4; installing a collimator 3 and calibrating the axis of the phase optical element 11 and the shielding component 10 according to the collimator 3.

[0032] Specifically, in this embodiment, combined with Figure 2As shown, the focusing lens and the sampling grating axial alignment method comprises: installing the front axial fork plate 2 and the rear axial fork plate 7, that is, installing the front axial fork plate 2 and the rear axial fork plate 7 around the flange of the focusing lens assembly 1, wherein the focusing lens assembly 1 comprises a shielding element 10, a phase optical element 11 and a focusing lens 12; installing the focusing adjusting element 4, and adjusting the focal length and the pose of the focusing adjusting element 4 according to the front axial fork plate 2 and the rear axial fork plate 7, that is, taking the optical axis of the focusing adjusting element 4 as the optical reference of the focusing lens 12, so as to align the focusing lens 12 according to the focusing adjusting element 4; installing the collimating element 3, and adjusting the collimating element 3 so that the optical axis of the collimating element 3 coincides with the optical axis of the focusing adjusting element 4, that is, taking the collimating element 3 as the optical reference of the phase optical element 11 and the shielding element 10, so as to align the phase optical element 11 and the shielding element 10 according to the collimating element 3, and then completing the axial alignment of the focusing lens assembly 1, and effectively improving the focusing ability of the focusing lens assembly 1.

[0033] Wherein, the following is combined Figure 2 and Figure 3 The focusing lens and the sampling grating axial alignment method are applied to the device.

[0034] The focusing lens and the sampling grating axial alignment device comprises a focusing lens assembly 1, a front axial fork plate 2, a collimating element 3, a focusing adjusting element 4, a rear axial fork plate 7, a first axial element 8 and a second axial element 9. During the axial alignment, the focusing adjusting element 4 is used for aligning the focusing lens 12 in the focusing lens assembly 1, which is specifically embodied as: the cross-shaped fork in the center of the focusing lens 12 is clearly imaged, the cross-shaped fork in the center of the focusing lens 12 coincides with the cross-shaped fork in the center of the objective lens of the focusing adjusting element 4, and the cross-shaped fork on the objective lens of the focusing adjusting element 4 coincides with the cross-shaped fork on the objective lens after being reflected by the focusing lens 12 and then imaged on the focusing adjusting element 4. At this time, the optical axis of the focusing lens 12 coincides with the theoretical optical axis, and the position and the pose of the focusing lens 12 are aligned.

[0035] During the axial alignment, the collimating element 3 is used for aligning the shielding element 10 and the phase optical element 11 in the focusing lens assembly 1, which is specifically embodied as: the collimating element 3 is installed on the first bracket 5 based on the focusing adjusting element 4, so that the optical axes of the focusing adjusting element 4 and the collimating element 3 coincide; the pose of the collimating element 3 is locked, and the collimating element 3 forms the optical reference of the phase optical element 11 and the shielding element 10; and then the poses of the phase optical element 11 and the shielding element 10 can be adjusted, so that the first axial element 8, the second axial element 9 and the collimating element 3 are collimated, and at this time, the poses of the phase optical element 11 and the shielding element 10 are accurate; the poses of the phase optical element 11 and the shielding element 10 are locked, and the axial alignment of the phase optical element 11 and the shielding element 10 is completed.

[0036] Wherein, in the embodiment, the three optical elements of the shielding member 10, the phase optical element 11 and the focusing lens 12 are aligned to obtain a better focal point image, wherein, "alignment" refers to the error of the optical axis of the optical element, which needs to be calibrated accordingly; the focusing lens assembly 1 is the element to be calibrated, and the shielding member 10, the phase optical element 11 and the focusing lens 12 in the focusing lens assembly 1 are aligned through the front alignment fork plate 2, the collimating member 3, the focusing member 4 and the rear alignment fork plate 7, thereby improving the focusing ability of the focusing lens assembly 1.

[0037] In the embodiment, the focusing lens is aligned and calibrated by the focusing member, and the phase optical element and the shielding member are aligned and calibrated by the collimating member, thereby effectively improving the focusing ability of the focusing lens assembly.

[0038] Optionally, the front alignment fork plate 2 and the rear alignment fork plate 7 are installed on the front side of the focusing lens assembly 1 and the rear side of the focusing lens assembly 1 respectively, and the center of the front alignment fork plate 2 and the center of the rear alignment fork plate 7 are located on the theoretical optical axis.

[0039] Specifically, in the embodiment, the front alignment fork plate 2 and the rear alignment fork plate 7 are installed on the front side of the focusing lens assembly 1 and the rear side of the focusing lens assembly 1 respectively, and the center of the front alignment fork plate 2 and the center of the rear alignment fork plate 7 are located on the theoretical optical axis. Figure 2 and Figure 3 Specifically, in the embodiment, the front alignment fork plate 2 and the rear alignment fork plate 7 are installed on the front side of the focusing lens assembly 1 and the rear side of the focusing lens assembly 1 respectively, and the center of the front alignment fork plate 2 and the center of the rear alignment fork plate 7 are located on the theoretical optical axis.

[0040] In the embodiment, the center of the front alignment fork plate and the center of the rear alignment fork plate are located on the theoretical optical axis, and the focal length and the pose of the focusing member can be adjusted according to the front alignment fork plate and the rear alignment fork plate, so that the optical axis of the focusing member is used as the optical reference of the focusing lens, thereby the focusing lens can be aligned and calibrated according to the focusing member, and the focusing ability of the focusing lens assembly is effectively improved.

[0041] Optionally, the adjustment of the focal length and the pose of the focusing member 4 according to the front alignment fork plate 2 and the rear alignment fork plate 7 includes: adjusting the focal length of the focusing member 4 to make the center fork wire of the front alignment fork plate 2 clearly imaged; adjusting the pose of the focusing member 4 to make the objective fork wire of the focusing member 4 coincide with the center fork wire of the front alignment fork plate 2.

[0042] Specifically, in the embodiment, the front and rear fixed-axis cross-wire plates are used to adjust the focal length and the pose of the focusing element, so that the optical axis of the focusing element can be used as the optical reference of the focusing lens, and the focusing lens assembly can be calibrated according to the focusing element. Figure 2 and Figure 3 As shown in FIGS. 2 and 3, the adjustment of the focal length and the pose of the focusing element 4 according to the front fixed-axis cross-wire plate 2 and the rear fixed-axis cross-wire plate 7 includes: adjusting the focal length of the focusing element 4 so that the central cross-wire of the front fixed-axis cross-wire plate 2 is clearly imaged within the field of view of the focusing element 4; and adjusting the pose of the focusing element 4 through the second support 6 so that the objective cross-wire of the focusing element 4 coincides with the central cross-wire of the front fixed-axis cross-wire plate 2 within the field of view of the focusing element 4, thereby achieving the preliminary adjustment of the focusing element 4. Then, the optical axis of the focusing element 4 can be used as the optical reference of the focusing lens 12, so that the focusing lens 12 can be calibrated according to the focusing element 4, and the focusing ability of the focusing lens assembly 1 is effectively improved.

[0043] In the embodiment, the focal length and the pose of the focusing element are adjusted by the front fixed-axis cross-wire plate, the preliminary adjustment of the focusing element is achieved, and then the optical axis of the focusing element can be used as the optical reference of the focusing lens, so that the focusing lens assembly can be calibrated according to the focusing element, and the focusing ability of the focusing lens assembly is effectively improved.

[0044] Optionally, the adjustment of the focal length and the pose of the focusing element 4 according to the front fixed-axis cross-wire plate 2 and the rear fixed-axis cross-wire plate 7 further includes: adjusting the focal length of the focusing element 4 so that the central cross-wire of the rear fixed-axis cross-wire plate 7 is clearly imaged; and adjusting the pose of the focusing element 4 so that the objective cross-wire of the focusing element 4 coincides with the central cross-wire of the rear fixed-axis cross-wire plate 7.

[0045] Specifically, in the embodiment, the front and rear fixed-axis cross-wire plates are used to adjust the focal length and the pose of the focusing element, so that the optical axis of the focusing element can be used as the optical reference of the focusing lens, and the focusing lens assembly can be calibrated according to the focusing element. Figure 2 and Figure 3 As shown in FIGS. 2 and 3, the adjustment of the focal length and the pose of the focusing element 4 according to the front fixed-axis cross-wire plate 2 and the rear fixed-axis cross-wire plate 7 further includes: adjusting the focal length of the focusing element 4 so that the central cross-wire of the rear fixed-axis cross-wire plate 7 is clearly imaged within the field of view of the focusing element 4; and adjusting the pose of the focusing element 4 through the second support 6 so that the objective cross-wire of the focusing element 4 coincides with the central cross-wire of the rear fixed-axis cross-wire plate 7 within the field of view of the focusing element 4, thereby achieving the preliminary adjustment of the focusing element 4. Then, the optical axis of the focusing element 4 can be used as the optical reference of the focusing lens 12, so that the focusing lens 12 can be calibrated according to the focusing element 4, and the focusing ability of the focusing lens assembly 1 is effectively improved.

[0046] In the embodiment, the focal length and the pose of the focusing element are adjusted by the front fixed-axis cross-wire plate, the preliminary adjustment of the focusing element is achieved, and then the optical axis of the focusing element can be used as the optical reference of the focusing lens, so that the focusing lens assembly can be calibrated according to the focusing element, and the focusing ability of the focusing lens assembly is effectively improved.

[0047] Optionally, the focusing lens 12 is calibrated based on the focusing element 4, which comprises adjusting the focal length of the focusing element 4 to make the crosshair in the center of the focusing lens 12 clearly imaged.

[0048] Specifically, in the embodiment, the focusing lens 12 is calibrated based on the focusing element 4, which comprises adjusting the focal length of the focusing element 4 to make the crosshair in the center of the focusing lens 12 clearly imaged. Figure 2 As shown, the focusing lens 12 is calibrated based on the focusing element 4, which comprises adjusting the focal length of the focusing element 4 to make the crosshair in the center of the focusing lens 12 clearly imaged. For the calibration of the focusing lens 12, first, the focal length of the focusing element 4 is adjusted so that the crosshair in the center of the focusing lens 12 is clearly imaged, that is, the crosshair in the center of the focusing lens 12 is clearly visible in the field of view of the focusing element 4. Since the clarity of the crosshair in the center of the focusing lens 12 substantially indirectly reflects the focusing effect of the focusing lens 12 at this time, the focusing ability of the focusing lens assembly 1 can be effectively improved by adjusting the focal length of the focusing element 4 in the embodiment.

[0049] In the embodiment, since the clarity of the crosshair in the center of the focusing lens substantially indirectly reflects the focusing effect of the focusing lens, the focusing ability of the focusing lens assembly can be effectively improved by adjusting the focal length of the focusing element.

[0050] Optionally, the focusing lens 12 is calibrated based on the focusing element 4, which further comprises adjusting the position of the focusing lens 12 to make the crosshair in the center of the focusing lens 12 coincide with the crosshair in the center of the objective lens of the focusing element 4.

[0051] Specifically, in the embodiment, the focusing lens 12 is calibrated based on the focusing element 4, which further comprises adjusting the position of the focusing lens 12 to make the crosshair in the center of the focusing lens 12 coincide with the crosshair in the center of the objective lens of the focusing element 4. Figure 2 As shown, the focusing lens 12 is calibrated based on the focusing element 4, which further comprises adjusting the position of the focusing lens 12 to make the crosshair in the center of the focusing lens 12 coincide with the crosshair in the center of the objective lens of the focusing element 4. At this time, the center of the focusing lens 12 is located on the theoretical optical axis, thereby completing the preliminary calibration of the focusing lens 12, and further effectively improving the focusing ability of the focusing lens assembly 1.

[0052] In the embodiment, the preliminary calibration of the focusing lens is completed by adjusting the position of the focusing lens to make the crosshair in the center of the focusing lens coincide with the crosshair in the center of the objective lens of the focusing element, thereby effectively improving the focusing ability of the focusing lens assembly.

[0053] Optionally, the focusing lens 12 is calibrated based on the focusing element 4, which further comprises adjusting the attitude of the focusing lens 12 to make the crosshair on the objective lens of the focusing element 4 coincide with the crosshair on the objective lens of the focusing element 4 after being reflected by the focusing lens 12; and fixing the focusing lens 12 to realize the calibration of the focusing lens 12.

[0054] Specifically, in the embodiment, the installation collimating element 3, according to the collimating element 3 to the phase optical element 11 and the shielding element 10 axis calibration includes: installing the first axis calibration element 8 on the phase optical element 11, installing the second axis calibration element 9 on the shielding element 10, and making the front surface of the first axis calibration element 8 and the front surface of the second axis calibration element 9 respectively parallel to the rear surface of the focusing lens 12. Figure 2 As shown, based on the focusing element 4 to the focusing lens 12 axis calibration also includes: adjusting the attitude of the focusing lens 12, at this time the focusing element 4 objective lens is provided with a cross wire, the cross wire is reflected after the focusing lens 12 will be imaged in the focusing element 4, forming a mirror image cross wire, if the mirror image cross wire and the original cross wire coincide, it shows that the optical axis of the focusing lens 12 coincides with the theoretical optical axis at this time, thereby completing the further axis calibration of the focusing lens 12, and effectively improving the focusing ability of the focusing lens assembly 1.

[0055] In the embodiment, by adjusting the attitude of the focusing lens to make the mirror image cross wire formed by the focusing lens reflection coincide with the original cross wire, the further axis calibration of the focusing lens is completed, and the focusing ability of the focusing lens assembly is effectively improved.

[0056] Optionally, the installation collimating element 3, according to the collimating element 3 to the phase optical element 11 and the shielding element 10 axis calibration includes: installing the first axis calibration element 8 on the phase optical element 11, installing the second axis calibration element 9 on the shielding element 10, and making the front surface of the first axis calibration element 8 and the front surface of the second axis calibration element 9 respectively parallel to the rear surface of the focusing lens 12.

[0057] Specifically, in the embodiment, the installation collimating element 3, according to the collimating element 3 to the phase optical element 11 and the shielding element 10 axis calibration includes: installing the first axis calibration element 8 on the phase optical element 11, installing the second axis calibration element 9 on the shielding element 10, and making the front surface of the first axis calibration element 8 and the front surface of the second axis calibration element 9 respectively parallel to the rear surface of the focusing lens 12.

[0058] In the embodiment, by setting the front surface of the first axis calibration element and the front surface of the second axis calibration element respectively parallel to the rear surface of the focusing lens, so as to adjust the attitude of the phase optical element and the shielding element according to the first axis calibration element and the second axis calibration element, thereby effectively improving the focusing ability of the focusing lens assembly.

[0059] Optionally, the installation collimating element 3, according to the collimating element 3 to the phase optical element 11 and the shielding element 10 axis calibration also includes: installing the collimating element 3, and making the optical axis of the collimating element 3 coincide with the optical axis of the focusing element 4.

[0060] Specifically, in the embodiment, the installation collimating element 3, according to the collimating element 3 to the phase optical element 11 and the shielding element 10 axis calibration includes: installing the first axis calibration element 8 on the phase optical element 11, installing the second axis calibration element 9 on the shielding element 10, and making the front surface of the first axis calibration element 8 and the front surface of the second axis calibration element 9 respectively parallel to the rear surface of the focusing lens 12. Figure 2 and Figure 3As shown, the installation of the collimating element 3 and the alignment of the phase optical element 11 and the shielding element 10 according to the collimating element 3 further comprises: adjusting the collimating element 3 according to the first support 5 so that the optical axis of the collimating element 3 coincides with the optical axis of the focusing element 4, and fixing the collimating element 3 at this time, which can be used as the optical reference of the phase optical element 11 and the shielding element 10, and then the collimating element 3 can be used to align the phase optical element 11 and the shielding element 10, thereby effectively improving the focusing ability of the focusing lens assembly 1.

[0061] In this embodiment, by setting the optical axis of the collimating element to coincide with the optical axis of the focusing element, the collimating element can be used as the optical reference of the phase optical element and the shielding element, and then the collimating element can be used to align the phase optical element and the shielding element, thereby effectively improving the focusing ability of the focusing lens assembly.

[0062] Optionally, the installation of the collimating element 3 and the alignment of the phase optical element 11 and the shielding element 10 according to the collimating element 3 further comprises: adjusting the attitude of the phase optical element 11 and the shielding element 10 so that the first alignment element 8 and the second alignment element 9 are collimated with the collimating element 3 respectively; and fixing the phase optical element 11 and the shielding element 10 to achieve the alignment of the phase optical element 11 and the shielding element 10.

[0063] Specifically, in this embodiment, the first alignment element 8 and the second alignment element 9 are used to align the phase optical element 11 and the shielding element 10. Figure 2 As shown, the installation of the collimating element 3 and the alignment of the phase optical element 11 and the shielding element 10 according to the collimating element 3 further comprises: adjusting the attitude of the phase optical element 11 and the shielding element 10 so that the first alignment element 8 and the second alignment element 9 are collimated with the collimating element 3 respectively, and at this time, the attitude of the phase optical element 11 and the shielding element 10 is correct, so the phase optical element 11 and the shielding element 10 are fixed at this time to achieve the alignment of the phase optical element 11 and the shielding element 10, thereby effectively improving the focusing ability of the focusing lens assembly 1.

[0064] In this embodiment, the first alignment element and the second alignment element are used to align the phase optical element and the shielding element, thereby effectively improving the focusing ability of the focusing lens assembly.

[0065] Although the present disclosure is as above, the protection scope of the present disclosure is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications shall fall within the protection scope of the present disclosure.

Claims

1. A method for fixed-axis calibration of a focusing lens and a sampling grating, characterized in that, The method comprises the following steps: installing front and rear fixed-axis fork wire plates (2) and (7); installing a focusing element (4) and adjusting the focal length and pose of the focusing element (4) according to the front and rear fixed-axis fork wire plates (2) and (7); aligning the focusing lens (12) according to the focusing element (4); installing a collimating element (3) and aligning the phase optical element (11) and the shielding element (10) according to the collimating element (3); wherein the installation of the collimating element (3) and the alignment of the phase optical element (11) and the shielding element (10) according to the collimating element (3) comprise: installing a first fixed-axis element (8) on the phase optical element (11) and a second fixed-axis element (9) on the shielding element (10), and making the front surface of the first fixed-axis element (8) and the front surface of the second fixed-axis element (9) respectively parallel to the rear surface of the focusing lens (12); wherein the installation of the collimating element (3) and the alignment of the phase optical element (11) and the shielding element (10) according to the collimating element (3) further comprise: installing the collimating element (3) and making the optical axis of the collimating element (3) coincide with the optical axis of the focusing element (4).

2. The method of claim 1, wherein, The installation of the front and rear fixed-axis fork wire plates (2) and (7) comprises: installing the front fixed-axis fork wire plate (2) on the front side of the focusing lens assembly (1) and the rear fixed-axis fork wire plate (7) on the rear side of the focusing lens assembly (1), and making the center of the front fixed-axis fork wire plate (2) and the center of the rear fixed-axis fork wire plate (7) on the theoretical optical axis.

3. The method for fixed-axis calibration of the focusing lens and sampling grating according to claim 1, characterized in that, The adjustment of the focal length and pose of the focusing element (4) according to the front and rear fixed-axis fork wire plates (2) and (7) comprises: adjusting the focal length of the focusing element (4) to make the center fork wire of the front fixed-axis fork wire plate (2) clearly imaged; adjusting the pose of the focusing element (4) to make the objective fork wire of the focusing element (4) coincide with the center fork wire of the front fixed-axis fork wire plate (2).

4. The method for fixed-axis calibration of the focusing lens and sampling grating according to claim 3, characterized in that, The adjustment of the focal length and pose of the focusing element (4) according to the front and rear fixed-axis fork wire plates (2) and (7) further comprises: adjusting the focal length of the focusing element (4) to make the center fork wire of the rear fixed-axis fork wire plate (7) clearly imaged; adjusting the pose of the focusing element (4) to make the objective fork wire of the focusing element (4) coincide with the center fork wire of the rear fixed-axis fork wire plate (7).

5. The method of claim 1, wherein, The alignment of the focusing lens (12) according to the focusing element (4) comprises: adjusting the focal length of the focusing element (4) to make the cross fork wire at the center of the focusing lens (12) clearly imaged.

6. The method for fixed-axis calibration of the focusing lens and sampling grating according to claim 5, characterized in that, The alignment of the focusing lens (12) according to the focusing element (4) further comprises: adjusting the position of the focusing lens (12) to make the cross fork wire at the center of the focusing lens (12) coincide with the cross fork wire at the center of the objective of the focusing element (4).

7. The method for fixed-axis calibration of the focusing lens and sampling grating according to claim 6, characterized in that, The alignment of the focusing lens (12) according to the focusing element (4) further comprises: Adjusting the posture of the focusing lens (12) to make the crosshair on the objective lens of the focusing member (4) coincide with the crosshair on the objective lens of the focusing member (4) after the crosshair on the objective lens of the focusing member (4) is reflected by the focusing lens (12); fixing the focusing lens (12) to realize the axial alignment of the focusing lens (12).

8. The method of claim 1, wherein, According to the axial alignment of the collimating member (3), the phase optical element (11) and the shielding member (10) further comprise: Adjusting the posture of the phase optical element (11) and the shielding member (10) to make the first axial alignment member (8) and the second axial alignment member (9) collimate with the collimating member (3) respectively; Fixing the phase optical element (11) and the shielding member (10) to realize the axial alignment of the phase optical element (11) and the shielding member (10).

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