CN114660754B - High-precision assembling and adjusting method for large-caliber optical lens group - Google Patents
High-precision assembling and adjusting method for large-caliber optical lens group Download PDFInfo
- Publication number
- CN114660754B CN114660754B CN202111597887.3A CN202111597887A CN114660754B CN 114660754 B CN114660754 B CN 114660754B CN 202111597887 A CN202111597887 A CN 202111597887A CN 114660754 B CN114660754 B CN 114660754B
- Authority
- CN
- China
- Prior art keywords
- lens
- adjusting
- group
- measuring
- error
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The application belongs to the technical field of telescope adjustment methods, and particularly relates to a high-precision adjustment method for a large-caliber optical lens group. The high-precision adjustment method for the large-caliber optical lens group comprises the following steps of: s1, respectively completing the assembly and adjustment of at least two single lenses and corresponding lens seats thereof to form a plurality of single lens assemblies; s2, integrating the single lens assemblies in the step S1 to form a lens group. The adjustment method provided by the application can realize adjustment and detection of each lens on the premise of ensuring the surface shape accuracy of the mirror surface, can enable the optical lens group to reach the optimal state, and has higher application value and innovation compared with the traditional method.
Description
Technical Field
The application relates to the technical field of telescope structures, in particular to a high-precision assembling and adjusting method of a large-caliber optical lens group.
Background
In order to meet the requirements of large-scale time domain sky patrol, guarana measurement, dark matter and dark energy detection, solar system extraplanetary searching and the like, a plurality of large-field-of-view telescopes have been built in the world, such as an 8.2m French star telescope (Subaru) of a Japanese astronomical platform, a wide-field Dark Energy Spectrometer (DESI), an 8.4 m caliber coaxial three-mirror large-field telescope LSST, two 2 m-class telescopes PS1 and PS2 of a Pan-STARRS, a Xinglong observation base 2.16 m telescope and the like. In order to achieve a large relative aperture and a large field of view, one of the main features of the telescope described above is the use of an optical system in the form of a primary focus, and the use of an optical lens of very large aperture at the primary focus location, e.g. a maximum lens aperture of 1.6 meters in LSST.
The optical principle of the large-field telescope in the form of the main focus is shown in fig. 1, and the large-field telescope is composed of an aspheric main reflector 103 and a plurality of optical lens groups 102, wherein light beams from an object at infinity are reflected by the main reflector 103, enter the optical lens groups 102 to complete correction of various aberrations, and are finally received by a high-sensitivity detector 101 at the position of an image plane to realize conversion from optical signals to electric signals, so that a clear object image is obtained.
The large-view-field telescope is very important to realize the expected detection capability and measurement precision and ensure the imaging quality of an optical system, and the relative position precision and the mirror surface shape precision of an optical lens are the precondition of ensuring the performance of the optical system. For large-caliber optical lens groups, the difficulty of ensuring that the position precision and the surface shape precision of all lenses meet the requirements of an optical system is very large, because the following four aspects are adopted:
(1) The difficulty of the optical lens assembly and adjustment is greatly improved along with the increase of the caliber;
(2) The surface shape precision and the position precision of the optical lens are coupled with each other, namely the surface shape precision is reduced when the position of the lens is adjusted;
(3) Inter-lens spacing errors include spacing errors and on-axis errors, which are more difficult for large lenses.
For small-sized lens groups, a centering adjustment mode is mainly adopted at present, namely lenses are directly placed in a lens seat, a certain gap is arranged between the lenses and the lens seat, and coaxial deviation among the lenses is adjusted through adjusting jackscrews at the edges of the lenses. The spacing deviation of each lens is measured by a depth micrometer and the spacing error is adjusted by grinding the spacer between the lenses. This way of fitting is very effective for small aperture lenses, since the small lens group position adjustment and detection is very easy to operate, which obviously is difficult to apply to fitting of large aperture optical lens groups. Another serious disadvantage is: the lens mirror surface shape accuracy is not considered in lens assembly adjustment, and only the relative positional deviation between the respective lenses is focused, which is possible for the small lenses, because lens position adjustment does not cause a decrease in the small-caliber lens mirror surface shape accuracy. However, for large aperture lenses, the adjustment process has a great influence on the accuracy of the mirror surface shape, and in the adjustment, not only the relative positional deviation of the lens but also the accuracy of the mirror surface shape cannot be considered, which may otherwise cause such a phenomenon: the relative positional deviation between lenses is small, but the accuracy of the mirror surface shape is poor, which also greatly reduces the performance of the optical system. In addition, the spacing error of the large-caliber lens is difficult to detect by using a depth micrometer, only a non-contact measurement means can be used, the large-caliber lens is very heavy, the position adjustment difficulty is very high, and the surface shape accuracy is easily reduced or even the lens body is easily damaged by directly adjusting the lens. In summary, the conventional method is difficult to be directly applied to the assembly and adjustment of the large-aperture optical lens assembly.
Disclosure of Invention
Based on the above, the application provides a high-precision adjustment method for the large-caliber optical lens group, which realizes adjustment and detection of each lens on the premise of ensuring the surface shape precision of the mirror surface, so that the optical lens group reaches the optimal state.
In order to solve the above problems, the present application provides a high-precision adjustment method for a large-aperture optical lens assembly, including:
s1, respectively completing the assembly and adjustment of at least two single lenses and corresponding lens seats thereof to form a plurality of single lens assemblies;
s2, integrating the single lens assemblies in the step S1 to form a lens group.
Further, the method for adjusting the single lens assembly in the step S1 includes:
s11, adjusting the mirror seat so that the mechanical rotation center of the mirror seat coincides with the reference axis;
s12, roughly adjusting the lens position and angle;
s13, finely adjusting the position, angle and height of the lens and installing a flexible supporting unit;
s14, fine-tuning the surface shape accuracy of the lens.
Further, the specific method of the step S11 includes: the mirror base is fixed on a two-dimensional translation table of the centering instrument, the rotary table is rotated, the outer circle of the mirror base is measured by using the dial indicator, the position of the two-dimensional translation table is adjusted by using the fine adjustment mechanism according to the measured data until the fluctuation of the percentage indicator is within +/-0.01 mm, the mechanical rotary center of the mirror base can be considered to coincide with a reference axis, and the fine adjustment mechanism of the two-dimensional translation table is locked after the adjustment is completed.
Further, the specific method of the step S12 includes:
uniformly placing 4-6 fine tuning tools on the inner circle end surface of the lens seat, and adjusting lifting sliding blocks of the fine tuning tools to ensure that the heights of the fine tuning tools are consistent;
the lens is dropped on the upper end face of a lifting sliding block in the fine adjustment tool;
and measuring the outer circle of the lens by using a dial indicator, horizontally adjusting the position of the lens according to the measured value until the fluctuation of the indicating number of the dial indicator is within +/-0.03 mm, and receiving an image reflected by the upper surface of the lens on the target surface of the CCD measured by using a centering instrument.
Furthermore, the contour error of the lifting sliding block is smaller than 0.03mm.
Further, the specific method of the step S13 includes:
the flexible supporting unit is connected with the corresponding indium steel supporting pad and the mirror base,
synchronously rotating the precise screw rods of all the fine tuning tools to enable the lifting slide blocks to synchronously ascend or descend so as to enable the lenses to be aligned with the flexible supporting units;
and rotating the rotary workbench, measuring the eccentric error and the angle error of the lens by using a centering instrument, finely adjusting the transverse position of the lens according to the eccentric error, and adjusting the inclination of the lens by using the fine adjustment tool according to the angle error, and repeating iterative adjustment.
Further, the specific method of step S14 includes:
placing the single lens assembly in a vertical detection light path, adjusting a 45-degree reflecting mirror and an interferometer to align with the detection light path, and detecting the surface shape precision of the concave surface;
and locally adjusting the surface shape precision of the lens by utilizing the fine adjustment tool according to the detection result of the interferometer until the surface shape precision requirement of the optical system is met.
Further, the step S2 integrates a plurality of single lens assemblies, and the method for forming the lens group includes:
s21, fixing the first group of single lens assemblies on a table top of a two-dimensional translation table of a centering instrument, rotating a rotary table, measuring the outer circle of a lens seat by using a dial indicator, and adjusting the position of the two-dimensional translation table by using a fine adjustment mechanism according to measurement data until the fluctuation of the percentage indicator number is within +/-0.02 mm; then, measuring the eccentric error of the upper surface of the first group of single lens assemblies by using the centering instrument, and adjusting the position of the two-dimensional translation table by using the fine adjustment mechanism until the eccentric error measured by the centering instrument is better than 0.005mm; after the adjustment is completed, locking a fine adjustment mechanism of the two-dimensional translation stage;
s22, placing a second group of single lens components above the first group of single lens components at the position of the connecting interface, rotating the rotary table, measuring the outer circle of the lens base by using a dial indicator, and adjusting the position of the two-dimensional workbench by using the fine adjustment mechanism according to measurement data until the fluctuation of the percentage representation number is within +/-0.02 mm; then, measuring the eccentric error of the upper surface of the second group of single lens components by using the centering instrument, and transversely and two-dimensionally adjusting the positions of the second group of single lens components until the eccentric error is better than 0.005mm; then, measuring the air interval between the lower surface of the second group single lens component and the upper surface of the first group single lens component by using the centering instrument, comparing the air interval with a theoretical interval, grinding a gasket between the two lens components according to theoretical and actual deviation, and repeating the process until the interval error and the eccentric error meet the requirements;
s23, repeating the step S22 until all lens components are assembled and adjusted.
The beneficial effects of this application: according to the method for assembling and adjusting the large-caliber optical lens group, firstly, the relative position precision of a single lens and a lens seat is adjusted by means of a centering instrument, so that a single lens component is formed; then detecting the surface shape precision of the lens mirror surface by means of an interferometer and locally adjusting each supporting point by means of a fine adjustment tool to enable the surface shape precision of the lens mirror surface to reach an optimal state; finally, the individual lenses are integrated by means of a centering device to form an optical lens group. The adjustment method provided by the application can realize adjustment and detection of each lens on the premise of ensuring the surface shape accuracy of the mirror surface, can enable the optical lens group to reach the optimal state, and has higher application value and innovation compared with the traditional method.
Drawings
FIG. 1 is a principal focal telescope optical principle;
FIG. 2 is a general view of a lens discrete multi-point support structure provided by an embodiment of the present application;
FIG. 3 is a schematic view of an optical lens assembly according to an embodiment of the present disclosure;
FIG. 4 is an ideal position of an optical lens assembly;
FIG. 5 is an actual position of an optical lens assembly;
FIG. 6 is a flowchart of an adjustment method according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram of a composition structure of a centering device according to an embodiment of the present disclosure;
FIG. 8 is a single surface deviation definition;
fig. 9 is a working schematic diagram of a centering device for measuring curved surface deviation according to an embodiment of the present application;
FIG. 10 is a CCD image of a curved surface under test;
FIG. 11 is an enlarged view of a fine tuning tool provided in an embodiment of the present application;
fig. 12 is a schematic view of a vertical detection light path provided in an embodiment of the present application.
The meaning of the reference numerals in the drawings are:
101-a detector; 102-an optical lens group; 103-an aspherical primary mirror;
201-a lens base; 202-a lens; 203-indium steel pad; 204-a flexible support unit; 205-washers; 206-percentage table; 207-fine tuning the tool;
207-1-a precise screw rod; 207-2 lifting slide block;
202-1-a first lens assembly; 202-2-a second lens assembly;
1-measuring a lens; 2-lifting support arms; 3-a two-dimensional translation stage; 4-a rotary workbench.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Preferred embodiments of the present application are shown in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Example 1:
the method is based on a large-caliber optical lens discrete multi-point flexible supporting structure, the discrete multi-point flexible supporting structure for the large-caliber optical lens is shown in fig. 2, a plurality of indium steel pads 203 are uniformly adhered to the periphery of the lens, a plurality of threaded holes are formed in each indium steel pad 203, a plurality of discrete flexible supporting units 204 are connected between the indium steel pads 203 and a lens seat 201, the lens 202 and the lens seat 201 are connected, an independent lens assembly is formed, and each flexible supporting unit 204 has flexibility in a plurality of directions to adapt to the influence of structural deformation or thermal deformation on the surface shape precision of the lens. The support structure described herein is not meant to refer to a particular lens, but rather a generic structural form.
After each lens and lens group form a separate assembly, the individual assemblies are assembled together to form an optical lens group, here, taking the two lens case as an example, as shown in fig. 3, the multiple lens case is similar to the two cases. Each lens has two optical surfaces, and in an ideal case, the optical axes of the first lens assembly 202-1 and the second lens assembly 202-2 coincide, and the two lens spacings coincide with the theoretical spacings. In practice, the first lens assembly 202-1 and the second lens assembly 202-2 have a certain deviation, which includes a position deviation δr, an optical axis angle deviation θ, and an interval deviation δd, as shown in fig. 5. Besides the relative deviation, each lens mirror surface also has a certain surface shape error, and the surface shape error is related to each lens flexible supporting unit.
The method for assembling and adjusting the large-caliber optical lens comprises the following two steps: the first step is that a single lens and a lens seat and other accessories are assembled and adjusted to form independent components, the step is completed together by means of a centering instrument and an interferometer, wherein the centering instrument is used for detecting the position deviation between the lens and the lens seat, the position deviation between the lens and the lens seat is too large to cause that a plurality of lenses cannot be integrated in the next step, and the interferometer is used for detecting the surface shape error of the lens; the second step is to integrate the plurality of lens assemblies obtained in the previous step into one body, i.e., an optical lens group, and to detect the relative positional deviation between the respective lenses by means of a centering instrument.
The basic principle of defining the decentration error of the optical lens and measuring the deviation of the centralizer is described as follows: the basic structural composition of the centering instrument is shown in fig. 7, and the main components include: the high-precision rotary workbench 4 has a rotary shaking error of better than 0.5', and a shaking position error of better than 0.005mm; a measuring lens 1 for transmitting and receiving a measuring signal and detecting a mirror deviation; the lifting support arm 2 is used for installing a measuring lens, a stepping motor is adopted to drive a ball screw to drive lifting action, and the specific height position is recorded and fed back by a linear grating ruler; the two-dimensional translation table 3 is placed at the table top position on the rotary table, and the upper surface of the two-dimensional translation table 3 is perpendicular to the rotary shaft of the rotary table 4.
The single curved surface deviation definition is shown in fig. 8, wherein the reference axis is defined as the rotation axis of the rotary table 4, the deviation includes a position deviation defined as the distance delta of the center of curvature from the reference axis and an inclination deviation defined as the angle arctan (delta/R) of the normal line of the intersection point of the reference axis and the curved surface from the reference axis.
The working principle of the centering instrument for measuring the curved surface deviation is shown in fig. 9, and the light beam emitted by the measuring lens is focused on the center of curvature through the measured curved surface, reflected back to the measuring lens along the normal direction of the measured surface, and imaged on the CCD target surface. When the measured curved surface is at an ideal position, namely, the curvature center of the measured curved surface passes through the reference axis, the image of the light beam reflected by the measured curved surface on the CCD target surface is positioned at the center of the target surface. When the center of curvature does not coincide with the reference axis, the image of the CCD target will be off-center and when the rotary table 4 is rotated, the image of the CCD target will be circled around the center of the target as shown in fig. 9. Besides, when a plurality of measured curved surfaces exist, the centering instrument can also measure the air interval between the curved surfaces by using a low coherence interferometry method, and the specific implementation principle is not repeated.
Specifically, the flow of the method for assembling and adjusting the large-aperture optical lens provided in the embodiment of the present application is as follows, please refer to fig. 12.
The assembly and adjustment of the single lens component, namely the assembly and adjustment process of the lens and the lens seat thereof:
(1) And (3) adjusting a mirror seat: placing the lens seat on the table surface of the two-dimensional translation table 3 of the centering instrument and fixing the lens seat by using screws; then the rotary table 4 is rotated, the outer circle of the lens seat 201 is measured by the dial indicator 206, and the position of the two-dimensional table is adjusted by the fine adjustment mechanism according to the measured data until the fluctuation of the percentage representation number is within +/-0.01 mm, so that the mechanical rotary center of the lens seat can be considered to coincide with the reference axis; after the adjustment is completed, the fine adjustment mechanism of the two-dimensional translation stage 3 is locked.
(2) Coarse lens position and angle: firstly, uniformly placing 4-6 fine tuning tools 207 on the inner circular end surface of a lens seat, and adjusting lifting sliding blocks 207-2 of the fine tuning tools 207 to ensure that the heights of the fine tuning tools are consistent, wherein the equal height error is less than 0.03mm; then, the lens is dropped on the upper end surface of the lifting slide block 207-2 in the fine adjustment tool 207; then, the outer circle of the lens is measured by a dial gauge 206, and the lens position is horizontally adjusted according to the measured value until the fluctuation of the dial indicator is within +/-0.03 mm, at which time an image reflected by the upper surface of the lens can be received on the CCD target surface measured by a centering instrument.
(3) Fine-tuning lens position, angle and height and mounting a flexible support unit: placing the flexible support units 204 at the corresponding connection positions, and synchronously rotating the precise screw rods 207-1 of the fine adjustment tools 207 to enable the lifting sliding blocks 207-2 to synchronously lift or descend until screw holes on the edge PAD of the lens are aligned with the positions of the unthreaded holes on the flexible support units 204; rotating the rotary table 4, and measuring the eccentric error and the angle error of the lens by using a centering instrument; the transverse position of the lens is finely adjusted according to the magnitude of the eccentric error, and the inclination of the lens is adjusted by utilizing a fine adjustment tool 207 according to the magnitude of the angle deviation, wherein the adjustment of the eccentric error and the angle error in the step needs repeated iterative adjustment until the two errors meet the use requirement; finally, after the adjustment is completed, the screws of the respective flexible supporting units 204 are connected and tightened.
(4) Fine tuning the lens surface shape accuracy: after the above lens position and angle adjustment and the installation of the flexible support units 204, the stress of each flexible support unit 204 is inevitably uneven, resulting in very poor accuracy of the mirror surface shape, and for this reason, it is necessary to finely adjust the flexible support units 204 locally to fine-tune the accuracy of the mirror surface shape. Building a vertical detection light path as shown in fig. 12, turning the light path into a horizontal state through a 45-degree reflecting mirror, and detecting the surface shape by using an interferometer; placing the single lens assembly in a vertical detection light path, adjusting a 45-degree reflecting mirror and an interferometer to align with the detection light path, and detecting the surface shape precision of the concave surface; the high-low points with larger local astigmatism can be seen on the mirror surface shape precision cloud chart, a fine adjustment tool 207 is respectively arranged at the left and right sides of the flexible supporting unit 204 at the positions of the high points, the precise screw rod of the fine adjustment tool 207 is rotated, the lifting slide block 207-2 is enabled to prop against the lower end face of the lens, the connecting screw rod of the flexible supporting unit 204 is loosened, the precise screw rod is continuously rotated, then the connecting screw rod is tightened again, the precise screw rod is reversely rotated to release the fine adjustment tool 207, the mirror surface shape precision is detected, and the adjustment process is repeated until the mirror surface shape precision meets the use requirement;
the steps (1) to (2) are iterative processes, that is, the lens decentration and the angle error adjustment result in the mirror surface shape becoming worse, and the decentration or the angle error is also caused when the mirror surface shape is adjusted, so that the steps (1) to (4) need to be repeated until the decentration and the angle error and the mirror surface shape precision meet the requirements.
Lens assembly, i.e. process for integrating individual single lens assemblies
(1) First block lens assembly adjustment: placing the first lens assembly 202-1 on the table top of the two-dimensional translation table 3 of the centering instrument and fixing the first lens assembly by using screws; then the rotary table 4 is rotated, the outer circle of the lens base is measured by the dial indicator 206, and the position of the two-dimensional translation table 3 is adjusted by the fine adjustment mechanism according to the measured data until the fluctuation of the percentage representation number is within +/-0.02 mm; then, measuring the eccentric error of the upper surface of the first lens component 202-1 by using a centering instrument, and adjusting the position of the two-dimensional translation table 3 by using a fine adjustment mechanism until the eccentric error measured by the centering instrument is better than 0.005mm, so that the first lens component can be considered to coincide with a reference axis; after the adjustment is completed, the fine adjustment mechanism of the two-dimensional translation stage 3 is locked.
(2) And (3) mounting and adjusting a second lens assembly: placing the second lens assembly 202-2 in a connection interface position over the first lens assembly 202-1; then the rotary table 4 is rotated, the outer circle of the lens base is measured by the dial indicator 206, and the position of the two-dimensional translation table 3 is adjusted by the fine adjustment mechanism according to the measured data until the fluctuation of the percentage representation number is within +/-0.02 mm; then, measuring the eccentric error of the upper surface of the second lens assembly by using a centering instrument, and transversely and two-dimensionally adjusting the position of the second lens assembly 202-2 until the eccentric error is better than 0.005mm; then, the air interval between the lower surface of the second lens assembly and the upper surface of the first lens assembly is measured by using a centering instrument, and compared with the theoretical interval, and the gasket 205 between the two lens assemblies is polished according to the theoretical and actual deviation, as shown in fig. 3; repeating the above process until the interval error and the eccentric error meet the requirements.
(3) The following single lens assembly is assembled and adjusted: and (3) repeating the step (2) until all the lens components are assembled and adjusted.
According to the method for assembling and adjusting the large-caliber optical lens group, firstly, the relative position precision of a single lens and a lens seat is adjusted by means of a centering instrument, so that a single lens component is formed; then detecting the surface shape precision of the lens mirror surface by means of an interferometer and locally adjusting each supporting point by means of a fine adjustment tool to enable the surface shape precision of the lens mirror surface to reach an optimal state; finally, the individual lenses are integrated by means of a centering device to form an optical lens group. The adjustment method provided by the application can realize adjustment and detection of each lens on the premise of ensuring the surface shape accuracy of the mirror surface, can enable the optical lens group to reach the optimal state, and has higher application value and innovation compared with the traditional method.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples only represent preferred embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (3)
1. The high-precision adjustment method of the large-caliber optical lens group is characterized by comprising the following steps of:
s1, respectively completing the assembly and adjustment of at least two single lenses and corresponding lens seats thereof to form a plurality of single lens assemblies;
s2, integrating the single lens assemblies in the step S1 to form a lens group;
the method for adjusting the single lens assembly in the step S1 comprises the following steps:
s11, adjusting the mirror seat so that the mechanical rotation center of the mirror seat coincides with the reference axis;
s12, roughly adjusting the lens position and angle;
s13, finely adjusting the position, angle and height of the lens and installing a flexible supporting unit;
s14, fine-tuning the surface shape precision of the lens;
the specific method of the step S11 comprises the following steps: fixing the mirror base on a two-dimensional translation table of a centering instrument, rotating a rotary table, measuring the outer circle of the mirror base by using a dial indicator, adjusting the position of the two-dimensional translation table by using a fine adjustment mechanism according to measurement data until the fluctuation of the percentage indicator is within +/-0.01 mm, and locking the fine adjustment mechanism of the two-dimensional translation table after the adjustment is completed, wherein the mechanical rotation center of the mirror base is considered to be coincident with a reference axis;
the specific method of the step S12 comprises the following steps:
uniformly placing 4-6 fine tuning tools on the inner circle end surface of the lens seat, and adjusting lifting sliding blocks of the fine tuning tools to ensure that the heights of the fine tuning tools are consistent;
the lens is dropped on the upper end face of a lifting sliding block in the fine adjustment tool;
measuring the outer circle of the lens by using a dial indicator, horizontally adjusting the position of the lens according to the measured value until the fluctuation of the indicating number of the dial indicator is within +/-0.03 mm, and receiving an image reflected by the upper surface of the lens on the target surface of a CCD (charge coupled device) measured by using a centering instrument;
the specific method of the step S13 comprises the following steps:
the flexible supporting unit is connected with the corresponding indium steel supporting pad and the mirror base,
synchronously rotating the precise screw rods of all the fine tuning tools to enable the lifting slide blocks to synchronously ascend or descend so as to enable the lenses to be aligned with the flexible supporting units;
rotating a rotary workbench, measuring the eccentric error and the angle error of the lens by using a centering instrument, finely adjusting the transverse position of the lens according to the eccentric error, adjusting the inclination of the lens by using the fine adjustment tool according to the angle error, and repeatedly and iteratively adjusting;
the specific method of the step S14 comprises the following steps:
placing the single lens assembly in a vertical detection light path, adjusting a 45-degree reflecting mirror and an interferometer to align with the detection light path, and detecting the surface shape precision of the concave surface;
and locally adjusting the surface shape precision of the lens by utilizing the fine adjustment tool according to the detection result of the interferometer until the surface shape precision requirement of the optical system is met.
2. The method for high-precision adjustment of a large-caliber optical lens group according to claim 1, wherein the contour error of the lifting slide block is less than 0.03mm.
3. The method for high-precision assembling and adjusting a large-aperture optical lens assembly according to claim 1, wherein the step S2 integrates a plurality of single lens assemblies, and the method for forming the lens assembly comprises the following steps:
s21, fixing the first group of single lens assemblies on a table top of a two-dimensional translation table of a centering instrument, rotating a rotary table, measuring the outer circle of a lens seat by using a dial indicator, and adjusting the position of the two-dimensional translation table by using a fine adjustment mechanism according to measurement data until the fluctuation of the percentage indicator number is within +/-0.02 mm; then, measuring the eccentric error of the upper surface of the first group of single lens assemblies by using the centering instrument, and adjusting the position of the two-dimensional translation table by using the fine adjustment mechanism until the eccentric error measured by the centering instrument is better than 0.005mm; after the adjustment is completed, locking a fine adjustment mechanism of the two-dimensional translation stage;
s22, placing a second group of single lens components above the first group of single lens components at the position of the connecting interface, rotating the rotary table, measuring the outer circle of the lens base by using a dial indicator, and adjusting the position of the two-dimensional translation table by using the fine adjustment mechanism according to measurement data until the fluctuation of the percentage representation number is within +/-0.02 mm; then, measuring the eccentric error of the upper surface of the second group of single lens components by using the centering instrument, and transversely and two-dimensionally adjusting the positions of the second group of single lens components until the eccentric error is better than 0.005mm; then, measuring the air interval between the lower surface of the second group single lens component and the upper surface of the first group single lens component by using the centering instrument, comparing the air interval with a theoretical interval, grinding a gasket between the two lens components according to theoretical and actual deviation, and repeating the process until the interval error and the eccentric error meet the requirements;
s23, repeating the step S22 until all lens components are assembled and adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111597887.3A CN114660754B (en) | 2021-12-24 | 2021-12-24 | High-precision assembling and adjusting method for large-caliber optical lens group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111597887.3A CN114660754B (en) | 2021-12-24 | 2021-12-24 | High-precision assembling and adjusting method for large-caliber optical lens group |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114660754A CN114660754A (en) | 2022-06-24 |
| CN114660754B true CN114660754B (en) | 2023-06-16 |
Family
ID=82025860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111597887.3A Active CN114660754B (en) | 2021-12-24 | 2021-12-24 | High-precision assembling and adjusting method for large-caliber optical lens group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114660754B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115291353B (en) * | 2022-08-19 | 2023-07-14 | 中国科学院长春光学精密机械与物理研究所 | Large-caliber small-spacing optical lens group, assembling and adjusting method and optical equipment |
| CN116068715A (en) * | 2023-01-14 | 2023-05-05 | 中国科学院长春光学精密机械与物理研究所 | Large-caliber lens flexible supporting structure and assembling and adjusting method |
| CN117055188B (en) * | 2023-10-13 | 2023-12-12 | 长春国宇光学科技有限公司 | Method for installing and adjusting coaxial three-reflector remote sensing optical system |
| CN117666094B (en) * | 2024-01-30 | 2024-04-16 | 中国科学院长春光学精密机械与物理研究所 | Large-caliber large-view-field telescope optical structure |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606864B (en) * | 2012-03-26 | 2014-02-05 | 西安交通大学 | Hemisphere centering plane supporting turntable structure of large-caliber ultra-precise measuring machine |
| CN103713370B (en) * | 2012-10-09 | 2015-11-11 | 南京理工大学 | A kind of method using three-coordinates measuring machine to debug the large-scale long focal length lens of near infrared |
| CN102998767B (en) * | 2012-11-20 | 2015-02-11 | 北京空间机电研究所 | Installation and adjustment method of infrared lenses |
| CN110888240B (en) * | 2019-11-06 | 2021-08-27 | 苏州大学 | Rapid adjusting method of Offner type spectral imaging optical system |
-
2021
- 2021-12-24 CN CN202111597887.3A patent/CN114660754B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114660754A (en) | 2022-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114660754B (en) | High-precision assembling and adjusting method for large-caliber optical lens group | |
| CN113588082B (en) | High-precision quick assembling and adjusting method for off-axis prism dispersion type hyperspectral imager | |
| CN110531531B (en) | Method for assembling and adjusting primary and secondary reflectors of Cassegrain optical system | |
| CN103575233A (en) | Method for detecting large-caliber large-relative-aperture parabolic reflector surface shape error | |
| CN110470398B (en) | Method for assembling and adjusting focusing-free interference spectrometer | |
| CN111175929A (en) | Metal-based off-axis three-mirror optical system capable of being quickly assembled and adjusted and assembling and adjusting method thereof | |
| CN113031296B (en) | Method for assembling and adjusting metal-based free-form surface three-reflection optical system capable of being assembled and adjusted quickly | |
| CN112504177B (en) | Multifunctional vertical zero-position overlapping scanning interference measuring device | |
| CN115166932B (en) | Optical axis adjusting method of large-caliber long-focus off-axis optical system | |
| CN113739719B (en) | Surface shape detection system and method of high-precision Schmidt correction plate | |
| CN109991712B (en) | U-shaped folded light path adjusting device and method | |
| CN109445124B (en) | Method for assembling and adjusting compact infrared optical lens | |
| CN110987371B (en) | Centering system and method for large-caliber concave aspheric surface | |
| CN111766675B (en) | Supporting structure of large-caliber optical correcting mirror | |
| Doel et al. | Assembly, alignment, and testing of the DECam wide field corrector optics | |
| CN108427170B (en) | Reflector supporting and adjusting mechanism and K mirror system for telescope image elimination rotation | |
| CN115164775A (en) | Large-caliber convex aspheric reflector surface shape detection device and detection method thereof | |
| CN103235418B (en) | Offline assembling and debugging platform for large-caliber optical focusing and frequency converting system provided with wedge-shape lens | |
| CN104570376B (en) | Multiple visual field sensor optical system coaxial alignment system and alignment method | |
| CN110850549A (en) | High-precision adjusting method for biaxial symmetric lens | |
| CN117054053B (en) | Device and method for calibrating focal plane of reflecting telescope | |
| CN117055188B (en) | Method for installing and adjusting coaxial three-reflector remote sensing optical system | |
| CN105510002A (en) | Transmission spherical wave lens fitting optical axis determining method | |
| CN113884023B (en) | High-precision detection device for inner wall of WolterI type X-ray focusing lens | |
| CN112596196B (en) | Large-caliber continuously adjustable hollow pyramid reflector device and adjusting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |