CN112269236B - Flexible supporting structure of infrared luminescence lens and assembly method thereof - Google Patents
Flexible supporting structure of infrared luminescence lens and assembly method thereof Download PDFInfo
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- CN112269236B CN112269236B CN202011180324.XA CN202011180324A CN112269236B CN 112269236 B CN112269236 B CN 112269236B CN 202011180324 A CN202011180324 A CN 202011180324A CN 112269236 B CN112269236 B CN 112269236B
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- 238000004020 luminiscence type Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000003292 glue Substances 0.000 claims description 23
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 9
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 abstract description 30
- 230000035882 stress Effects 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 8
- 230000008646 thermal stress Effects 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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
- 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
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention relates to an infrared luminescence lens flexible supporting structure and an assembly method thereof. The invention aims to solve the technical problem that the optical element is severely deformed due to the fact that the optical element and the supporting structure are offset due to different shrinkage in the cooling process under the condition of huge temperature difference in the existing low-temperature infrared lens system, and provides an infrared luminescence lens flexible supporting structure and an assembly method thereof. The flexible supporting structure can bond the infrared luminescence lens on the flexible supporting structure through the first flexible supporting arm, directly release the deformation and the thermal stress of the lens, the second flexible supporting structure is arranged at the flange connecting hole of each part, the deformation and the thermal stress of the lens are released secondarily, and the stress release of the flexible structure is carried out three times through the first flexible supporting arm, the second flexible supporting structure and the bonding part, so that the tensile stress of the supporting structure, which is born by the optical element in the process of greatly changing the temperature, is greatly reduced.
Description
Technical Field
The invention relates to an optical lens supporting structure, in particular to an infrared luminescence lens flexible supporting structure and an assembly method thereof.
Background
The high-resolution hyperspectral load technology is developed in response to the application requirements of high-resolution load to ground remote sensing mapping, and is mainly used for acquiring the spectral characteristics and the changes of a wide-spectrum target. In order to meet the infrared detection requirement of ground remote sensing mapping and meet the application requirements of high sensitivity and low noise, the luminescence infrared transmission technology is a necessary means.
For the infrared transmission system of the cold light technology, the processing and the assembly of the optical element and the supporting structure are carried out at normal temperature, the actual working environment of the infrared system is 100K, the temperature change is 173K, and the optical element and the supporting structure are different in material, so that the linear expansion coefficient, the specific heat capacity and other performance parameters are different, and the performance parameters are nonlinear with the temperature change. The problem of how to overcome the problem of influencing the imaging quality due to deformation is a key challenge in research and development design.
In order to solve the problem of severe deformation of an optical element caused by large temperature difference between a processing and assembling process and an actual working environment of an infrared luminescence lens, the following two schemes are generally adopted:
Scheme one: the support structure is made of a material similar to the performance (i.e., coefficient of linear expansion) of the optical element, so that the relative deformation is reduced, and the stress of the optical element is further reduced. The optical machine structure in the low-temperature infrared optical system in the scheme follows the uniformity principle, and the athermalization design is realized. However, in the case of a low-temperature infrared optical system, the optical element is a glass product, the supporting material is basically metal, and the material matching with the performance of the optical element is not easy to realize, and a series of problems such as excessively low rigidity, excessively heavy weight, excessively high cost and the like may also be caused, so that the optical-mechanical structure is difficult to realize uniformity in the scheme.
Scheme II: when the optical element and the supporting structure are made of different materials, the optical element and the supporting structure are not fixedly connected, the relative movement freedom degree is designed, so that the lens has the freedom degrees in the axial direction and the radial direction, and huge stress caused by different deformation of the optical element and the supporting structure due to temperature change is released. In order to ensure that the optical requirements have high requirements on the machining precision of the optical element and the supporting structure parts, the scheme brings inconvenience to the assembly process.
In a word, the above two schemes can not effectively and conveniently solve the problem that the optical element is severely deformed due to the position deviation of the optical element caused by different shrinkage of the optical element and the supporting structure in the cooling process under the huge temperature difference of the low-temperature infrared lens system.
Disclosure of Invention
The invention aims to solve the technical problem that the optical element is severely deformed due to the fact that the optical element and the supporting structure are offset due to different shrinkage in the cooling process under the condition of huge temperature difference in the existing low-temperature infrared lens system, and provides an infrared luminescence lens flexible supporting structure and an assembly method thereof.
In order to solve the technical problems, the technical solution provided by the invention is as follows:
The infrared luminescence lens flexible supporting structure is characterized in that: comprises an integrated flexible supporting unit and N guiding locating pins;
the flexible supporting unit comprises a rigid supporting ring, a flange connected to the periphery of the rigid supporting ring, N guide positioning pin hole structures uniformly arranged on the periphery of the rigid supporting ring, and N first flexible supporting arms connected with adjacent guide positioning pin hole structures;
The side, facing the infrared luminescence lens to be supported, of the positioning pin hole of each guiding positioning pin hole structure is in an opening shape, and N guiding positioning pins are inserted into the positioning pin holes and tangent to the infrared luminescence lens to be supported;
The first flexible supporting arm is provided with a glue injection gap with the infrared luminescence lens to be supported;
a plurality of flange connecting holes are uniformly distributed on the flange along the circumference, and a second flexible supporting structure is arranged around each flange connecting hole;
The N is more than or equal to 3.
Further, in order to ensure reliable connection, the infrared lens support device further comprises N lens bonding tables which are respectively arranged in the middle of each first flexible support arm, and glue injection gaps between the lens bonding tables and the infrared luminescence lens to be supported are reserved;
The center of each lens bonding table is provided with a first glue injection hole, and the rigid support ring is provided with N second glue injection holes which are respectively communicated with each first glue injection hole.
Further, the second flexible supporting structure comprises two arc through grooves which are respectively arranged at two sides of the flange connection hole, two ends of each arc through groove extend towards two sides to form two arc second flexible supporting arms, the second flexible supporting arms are concentric with the infrared luminescence lens to be supported, and the through grooves of the second flexible supporting structures of the adjacent flange connection holes are not communicated with each other.
Further, the inner side of the lens bonding table is an arc surface.
Further, in order to meet the requirements of the infrared luminescence lens on the flexibility and rigidity of the flexible supporting structure, the thickness of the first flexible supporting arm is 0.5+/-0.1 mm; the thickness of the second flexible supporting arm is 0.5+/-0.1 mm.
Further, in order to reduce stress concentration, the connection part of each first flexible supporting arm and the lens bonding table and the guide positioning pin hole structure respectively adopts a fillet transition structure; a round corner transition structure is adopted between the arc-shaped through groove of each second flexible supporting structure and the extending section of each second flexible supporting structure, and the other end of the extending section adopts a round corner structure.
Further, in order to reduce the weight, the rigid support ring is provided with a weight reducing hole.
Further, in order to meet the requirements of rigidity and toughness, the integrated flexible supporting unit is processed by adopting a titanium alloy material.
Further, to facilitate the installation of the infrared luminescence lens and the processing of the flexible support structure, the n=4.
The assembling method of the infrared luminescence lens flexible supporting structure is characterized by comprising the following steps of:
1) Inserting N guide positioning pins into N positioning pin holes;
2) Placing the infrared luminescence lens in the center of the rigid support ring along N guide positioning pins, and bonding the rigid support ring and the infrared luminescence lens by injecting glue;
3) And connecting the flexible supporting structure bonded with the infrared luminescence lens to the component to be connected through a flange, and completing the assembly.
Compared with the prior art, the invention has the following beneficial effects:
1. According to the infrared luminescence lens flexible supporting structure and the assembly method thereof, the infrared luminescence lens is adhered and arranged on the flexible supporting structure through the first flexible supporting arm, the deformation and the thermal stress of the lens are directly released, the second flexible supporting structure is arranged at each flange connecting hole, the deformation and the thermal stress of the lens are released secondarily, and the tensile stress of the supporting structure, which is applied to an optical element (the infrared luminescence lens) in the process of greatly changing the temperature, is greatly reduced through the stress release of the first flexible supporting arm, the second flexible supporting structure and the adhered part for three times. The invention effectively and conveniently solves the problem of severe deformation of the optical element caused by large temperature difference between processing assembly and actual working environment of the mid-low temperature infrared optical system in cold light science through the flexible structure.
2. According to the infrared luminescence lens flexible supporting structure and the assembly method thereof, the infrared luminescence lens is adhered and arranged on the flexible supporting structure through the N lens adhering tables, wherein the number of N is adjustable according to the lens size, the lens adhering tables are uniformly distributed, and each lens adhering table is arranged in the middle of the first flexible supporting arm and directly releases the deformation and the thermal stress of the lens.
3. For infrared luminescence lenses with different calibers and weights, the flexibility and the rigidity of the flexible supporting structure of the infrared luminescence lenses can be adjusted by adjusting the number of the lens bonding tables and the thickness and the length of the first flexible supporting arm and the second flexible supporting arm, so that the deformation requirements of different lenses are realized.
4. The joint of each first flexible supporting arm and the lens bonding table and the guide positioning pin hole structure respectively adopts a fillet transition structure; a circular-angle transition structure is adopted between the arc-shaped through groove of each second flexible supporting structure and the extending section of each second flexible supporting structure, and the other end of the extending section adopts a circular-angle structure, so that stress concentration at the flexible supporting arm is reduced, and stress of the first flexible supporting arm is avoided.
5. The integrated flexible supporting unit is made of titanium alloy materials, has good rigidity and toughness, and is convenient for realizing the processing of a flexible structure.
6. The flexible supporting structure is directly bonded with the infrared luminescence lens, so that the processing difficulty and the debugging and assembling difficulty of the flexible supporting structure are reduced.
Drawings
FIG. 1 is an exploded view of the flexible support structure of the IR luminescence lens according to the present invention after assembly with the IR luminescence lens to be supported;
FIG. 2 is a schematic view of the structure of the integrated flexible support unit of the infrared luminescence lens flexible support structure of the present invention;
FIG. 3 is a semi-sectional view of the flexible support structure of the IR lens to be supported according to the invention after assembly;
FIG. 4 is a schematic view of the structure of the infrared luminescence lens flexible support structure of the present invention at a first flexible support arm;
FIG. 5 is a schematic view of the structure of the infrared luminescence lens flexible support structure of the present invention at a second flexible support arm;
Reference numerals illustrate:
1-flexible supporting units, 11-rigid supporting rings, 12-flanges, 121-flange connecting holes, 122-second flexible supporting structures, 1221-second flexible supporting arms, 13-guiding positioning pin hole structures, 131-positioning pin holes, 14-lens bonding tables, 141-first glue injection holes, 142-second glue injection holes, 15-first flexible supporting arms, 16-lightening holes, 2-guiding positioning pins and 3-infrared luminescence lenses.
Detailed Description
Further description will be made with reference to the drawings and examples.
An infrared luminescence lens flexible supporting structure, as shown in figures 1 to 3, comprises an integrated flexible supporting unit 1 and N guiding positioning pins 2; the flexible supporting unit 1 comprises a rigid supporting ring 11, a flange 12 connected to the outer periphery of the rigid supporting ring 11, N guide positioning pin hole structures 13 uniformly arranged on the inner periphery of the rigid supporting ring 11, and N first flexible supporting arms 15 (flexible sheets) connected with adjacent guide positioning pin hole structures 13; the positioning pin holes 131 on the N guiding and positioning pin hole structures 13 are all located at the same radial position of the rigid supporting ring 11, each positioning pin hole 131 is open towards the side of the infrared luminescence lens 3 to be supported, and N guiding and positioning pins 2 are inserted into the positioning pin holes 131 and tangent to the infrared luminescence lens 3 to be supported (line contact, but limited by processing precision, may not be complete line contact), that is, the positioning pin holes 131 on the N guiding and positioning pin hole structures 13 are matched with the N guiding and positioning pins 2 to circumferentially position the infrared luminescence lens 3 to be supported; the first flexible supporting arm 15 is provided with a glue injection gap with the infrared luminescence lens 3 to be supported, and is used for circumferentially matching with the infrared luminescence lens 3 to be supported; the flange 12 is uniformly provided with 6 flange connection holes 121 with 60-degree included angles along the circumference, and a second flexible supporting structure 122 is arranged around each flange connection hole 121, and the second flexible supporting structure 122 can be a common hinge arm structure and plays a role in buffering similar to a flexible sheet; n is more than or equal to 3, and is adjustable according to the lens size, and the uniform distribution is achieved, wherein N=4, and the 4 positioning pin holes 131 are preferably uniformly distributed at the circumference of 90 degrees.
The structure utilizes the bending elastic deformation of the flexible supporting structure at the joint of the flange 12 and the flexible supporting structure at the joint of the lens (the joint of the first flexible supporting arm 1 and the adhesive) to enable the flange connecting hole 121 and the first flexible supporting arm 15 to generate tiny radial displacement, so as to overcome the deformation of the infrared luminescence lens 3 caused by temperature change and weaken the deformation stress caused by different heat shrinkage of the infrared luminescence lens 3 and the supporting structure due to different material properties in the process of huge temperature change.
The rigid support ring 11 further comprises N lens bonding tables 14 which are respectively arranged in the middle of each first flexible support arm 15, the inner side of each lens bonding table 14 is an arc surface, and the lens bonding tables 14 are provided with glue injecting gaps with the infrared luminescence lens 3 to be supported; the center of each lens bonding table 14 is provided with a first glue injection hole 141, and the rigid support ring 11 is provided with N second glue injection holes 142 which are respectively communicated with each first glue injection hole 141. The second flexible support structure 122 includes two arc-shaped through slots respectively opened at two sides of the flange connection hole 121, two ends of each arc-shaped through slot extend to two sides to form two arc-shaped second flexible support arms 1221 (flexible sheets), the second flexible support arms 1221 are concentric with the infrared luminescence lens 3 to be supported, and the through slots of the second flexible support structures 122 adjacent to the flange connection hole 121 are not communicated with each other.
As shown in fig. 4, the connection parts of each first flexible supporting arm 15 and the lens bonding table 14 and the guide positioning pin hole structure 13 respectively adopt a fillet transition structure so as to reduce stress concentration at the first flexible supporting arm 15 and avoid stress of the first flexible supporting arm 15; as shown in fig. 5, a rounded transition structure is adopted between the arc-shaped through groove of each second flexible supporting structure 122 and the extension section thereof, and the other end of the extension section adopts a rounded structure so as to reduce stress concentration at the second flexible supporting arm 1221;
Preferably the thickness of the first flexible support arm 15 is 0.5mm; the second flexible support arm 1221 has a thickness of 0.5mm. In practical design, the thickness and the arc length of the first flexible supporting arm 15 at the lens bonding position and the second flexible supporting arm 1221 at the external connecting position are designed and adjusted to adjust the flexibility of the flexible supporting structure and the overall rigidity of the lens group, so that stability is provided for the optical element, mirror deformation of the infrared luminescence lens 3 caused by temperature change is reduced or even eliminated, and the surface shape precision of the infrared luminescence lens 3 under the temperature change and low-temperature working conditions is ensured.
The rigid support ring 11 is provided with a lightening hole 16. The integrated flexible supporting unit 1 is formed by processing titanium alloy materials, has high hardness, and is easy to ensure the stability of an optical assembly and simultaneously easy to carry out flexible structural design; the infrared luminescence lens 3 to be supported is made of glass (low-temperature optical material Ge) and has a certain thickness.
The assembling method of the infrared luminescence lens flexible supporting structure comprises the following steps:
1) Before bonding, inserting N guide positioning pins 2 into N positioning pin holes 131;
2) Placing the infrared luminescence lens 3 on N lens bonding tables 14 along N guide positioning pins 2, injecting low-temperature glue through a first glue injection hole 141 and a second glue injection hole 142, bonding and solidifying to bond the infrared luminescence lens 3, wherein a glue layer is arranged between the lens bonding tables 14 and the infrared luminescence lens 3, the first flexible supporting arms 15 at the lens bonding positions are symmetrically arranged at two sides of the lens bonding tables 14, and the second flexible supporting arms 122 are symmetrically arranged at two sides of the flange connecting hole 121;
3) The flexible support structure of the bonded infrared luminescence lens 3 is connected to the component to be connected through the flange 12, and the assembly is completed.
Finally, it should be noted that: the foregoing embodiments are merely for illustrating the technical solutions of the present invention, and not for limiting the same, and it will be apparent to those skilled in the art that modifications may be made to the specific technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, without departing from the spirit of the technical solutions protected by the present invention.
Claims (7)
1. An infrared luminescence lens flexible support structure, which is characterized in that: comprises an integrated flexible supporting unit (1) and N guiding locating pins (2);
The flexible supporting unit (1) comprises a rigid supporting ring (11), a flange (12) connected to the periphery of the rigid supporting ring (11), N guide positioning pin hole structures (13) uniformly arranged on the inner periphery of the rigid supporting ring (11), and N first flexible supporting arms (15) connected with adjacent guide positioning pin hole structures (13);
the positioning pin holes (131) of each guiding positioning pin hole structure (13) are open towards the side of the infrared luminescence lens (3) to be supported, and N guiding positioning pins (2) are inserted into the positioning pin holes (131) and tangent to the infrared luminescence lens (3) to be supported;
the first flexible supporting arm (15) is provided with a glue injection gap with the infrared luminescence lens (3) to be supported;
A plurality of flange connection holes (121) are uniformly distributed on the flange (12) along the circumference, and a second flexible supporting structure (122) is arranged around each flange connection hole (121);
n is more than or equal to 3;
The lens bonding tables (14) are respectively arranged in the middle of each first flexible supporting arm (15), and glue injection gaps between the lens bonding tables (14) and the infrared luminescence lens (3) to be supported are reserved;
a first glue injection hole (141) is formed in the center of each lens bonding table (14), and N second glue injection holes (142) which are respectively communicated with each first glue injection hole (141) are formed in the rigid support ring (11);
the second flexible supporting structure (122) comprises two arc-shaped through grooves which are respectively arranged at two sides of the flange connecting hole (121), two ends of each arc-shaped through groove extend to two sides to form two arc-shaped second flexible supporting arms (1221), the second flexible supporting arms (1221) are concentric with the infrared luminescence lens (3) to be supported, and the through grooves of the second flexible supporting structures (122) of the adjacent flange connecting holes (121) are not communicated with each other;
the connection part of each first flexible supporting arm (15) and the lens bonding table (14) and the guide positioning pin hole structure (13) adopts a fillet transition structure; a rounded transition structure is adopted between the arc-shaped through groove of each second flexible supporting structure (122) and the extending section of each second flexible supporting structure, and the other end of the extending section adopts a rounded transition structure.
2. The infrared luminescence lens flexible support structure according to claim 1, wherein: the inner side of the lens bonding table (14) is an arc surface.
3. The infrared luminescence lens flexible support structure according to claim 2, wherein: the thickness of the first flexible supporting arm (15) is 0.5+/-0.1 mm; the second flexible support arm (1221) has a thickness of 0.5 + -0.1 mm.
4. The infrared luminescence lens flexible support structure according to claim 1, wherein: the rigid support ring (11) is provided with a lightening hole (16).
5. The infrared luminescence lens flexible support structure according to claim 1, wherein: the integrated flexible supporting unit (1) is formed by processing a titanium alloy material.
6. The infrared luminescence lens flexible support structure according to claim 1, wherein: the n=4.
7. A method of assembling an infrared luminescence lens flexible support structure according to any of claims 1 to 6, comprising the steps of:
1) Inserting N guide positioning pins (2) into N positioning pin holes (131);
2) The infrared luminescence lens (3) is arranged at the center of the rigid support ring (11) along the N guide positioning pins (2), and the rigid support ring (11) and the infrared luminescence lens (3) are bonded through glue injection;
3) And (3) connecting the flexible supporting structure of the bonded infrared luminescence lens (3) to the component to be connected through a flange (12) thereof, and completing the assembly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011180324.XA CN112269236B (en) | 2020-10-29 | 2020-10-29 | Flexible supporting structure of infrared luminescence lens and assembly method thereof |
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| CN202011180324.XA CN112269236B (en) | 2020-10-29 | 2020-10-29 | Flexible supporting structure of infrared luminescence lens and assembly method thereof |
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| CN112269236A CN112269236A (en) | 2021-01-26 |
| CN112269236B true CN112269236B (en) | 2024-05-31 |
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| CN115877534A (en) * | 2021-09-29 | 2023-03-31 | 中国科学院西安光学精密机械研究所 | An infrared cold optical lens assembly with a multi-flexible support structure |
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| JP2007304415A (en) * | 2006-05-12 | 2007-11-22 | Matsushita Electric Ind Co Ltd | Lens, lens supporting structure, and optical pickup device using them |
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2020
- 2020-10-29 CN CN202011180324.XA patent/CN112269236B/en active Active
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| JP2007304415A (en) * | 2006-05-12 | 2007-11-22 | Matsushita Electric Ind Co Ltd | Lens, lens supporting structure, and optical pickup device using them |
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| 应用于冷光学组件的透镜支撑技术研究;刘祥意;张景旭;乔兵;范磊;王文攀;王富国;;光学精密工程;20170715(第07期);全文 * |
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