CN115877534A - Infrared cold light optical lens assembly with multiple flexible supporting structures - Google Patents
Infrared cold light optical lens assembly with multiple flexible supporting structures Download PDFInfo
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- CN115877534A CN115877534A CN202111153496.2A CN202111153496A CN115877534A CN 115877534 A CN115877534 A CN 115877534A CN 202111153496 A CN202111153496 A CN 202111153496A CN 115877534 A CN115877534 A CN 115877534A
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Abstract
The invention relates to an infrared luminescence optical lens assembly with multiple flexible supporting structures, and aims to solve the technical problems that the prior art cannot effectively and conveniently solve the problem that a low-temperature infrared lens system generates severe deformation of an optical element under huge temperature difference, and the requirements of high surface shape precision and low deformation stress of a luminescence optical-mechanical system are difficult to realize, so that the imaging quality is directly influenced. The assembly comprises an infrared luminescence optical lens, a luminescence optical lens flexible supporting structure, a rigid seat and N external connecting screws; the cold optical lens flexible supporting structure is arranged on the rigid seat through an external connecting screw; the cold optical lens flexible supporting structure comprises a flexible wall, M bonding tables and N external connecting seats; m bonding tables are fixedly connected to the inner wall of the flexible wall, and N external connecting seats are fixedly connected to the outer wall of the flexible wall; m bonding stages of the cold optical lens flexible supporting structure are bonded with the infrared cold optical lens through low-temperature glue.
Description
Technical Field
The invention relates to an infrared luminescence optical lens, in particular to an infrared luminescence optical lens assembly with a multi-flexible supporting structure.
Background
In recent years, infrared optical systems are widely applied to the fields of aerospace, medicine, agricultural production and the like, the infrared detection in various fields is rapidly developed, and thermal noise has a remarkable influence on the infrared detection sensitivity and is an important factor for restricting the development of the infrared detection sensitivity. By reducing the temperature of the optical system, the internal noise of the system can be effectively reduced, and the detection sensitivity of the system is further improved.
With the increasing demand of infrared detection, the infrared luminescence technology is rapidly developed, and the low-temperature deformation of the infrared optical element is one of the key factors restricting the development of the infrared luminescence technology. For a space detection remote sensor, the unification of an optical element and a supporting structure material can not be realized all the time, the thermal expansion coefficient of the space detection remote sensor always has deviation, the thermal expansion coefficient changes in a nonlinear mode along with the temperature change, and the shrinkage deformation amount of the optical element and the supporting structure in the cooling process is different, so that the optical element bears huge deformation stress. Meanwhile, at present, the processing and the assembly of the optical element and the supporting structure are carried out at normal temperature, while the actual working environment of the infrared system is carried out in a very low temperature environment, the temperature change reaches 200K or even more, and thus, the strict requirement is provided for the temperature adaptability of the supporting structure.
In order to solve the problems of large surface shape change and large thermal stress of an optical element caused by large temperature difference in an infrared system, researchers at home and abroad carry out corresponding research. At present, the low-temperature infrared cold optical system is mainly designed in a homogeneity mode at home and abroad, no thermalization is realized, and the whole system is structurally processed by selecting the same material so as to avoid deformation difference among structural members. However, the difference of the performance of the optical element and the supporting material restricts the realization of the uniformity, but the system adopting the optical element of the same material is only suitable for a metal mirror reflection system, and for a complex optical system, the transmission system adopts the optical element and the supporting structure of different materials, and under the condition that the materials of the optical element and the supporting structure are different, the optical element and the supporting structure are mainly adopted at present to be not fixedly connected, and the relative movement freedom degree is designed, so that the lens has the freedom degrees in the axial direction and the radial direction, and the release of the huge stress caused by the different deformation of the optical element and the supporting structure caused by the temperature change is solved, however, the problem of the scheme is that: in order to meet the optical requirements, the requirements on the machining precision of the optical element and the supporting structure part are high, and inconvenience is brought to assembly.
The two schemes can not effectively and conveniently solve the problem that the low-temperature infrared lens system generates severe deformation of the optical element under the huge temperature difference, and the requirements of high surface shape precision and low deformation stress of the cold light optical-mechanical system are difficult to realize.
Disclosure of Invention
The invention aims to solve the technical problems that the prior art can not effectively and conveniently solve the problem that the low-temperature infrared lens system generates severe deformation of an optical element under huge temperature difference, and the requirements of high surface shape precision and low deformation stress of a luminescence optical-mechanical system are difficult to realize, so that the imaging quality is directly influenced, and provides an infrared luminescence optical lens assembly with a multi-flexible supporting structure.
In order to solve the technical problems, the technical solution provided by the invention is as follows:
an infrared cold optical lens assembly with multiple flexible support structures, comprising:
the infrared luminescence optical lens comprises an infrared luminescence optical lens, a luminescence optical lens flexible supporting structure, a rigid seat and N external connecting pieces; n is more than or equal to 2;
the cold optical lens flexible supporting structure is arranged on the rigid seat through N external connecting pieces;
the cold optical lens flexible supporting structure is an integrated piece and comprises a flexible wall, M bonding tables and N external connecting seats; m is more than or equal to 3;
the flexible wall is an annular wall, M bonding tables are fixedly connected to the inner wall of the flexible wall, and N external connecting seats are fixedly connected to the outer wall of the flexible wall;
the M bonding tables are provided with radial glue injection holes;
the N external connecting seats are respectively provided with an external flexible structure capable of buffering along the radial direction;
m bonding tables of the cold optical lens flexible supporting structure are bonded with the infrared cold optical lens through low-temperature glue.
Further, the outer flexible structure comprises an outer flexible groove and an inner flexible groove which are arc-shaped;
the outer side flexible groove and the inner side flexible groove are both of a structure with one side opened and one side closed;
one side of the opening of the outer flexible groove is positioned on one side wall of the outer connecting seat;
one side of the opening of the inner flexible groove is positioned on the other side wall of the outer connecting seat;
a flexible wall is formed between the inner side wall of the outer flexible groove and the outer side wall of the inner flexible groove;
the N outer flexible grooves are positioned on the same circumference;
the N inner flexible grooves are positioned on the same circumference.
Furthermore, an external flexible groove is adopted to support a fillet at the closed side of the external flexible groove;
and one closed side of the inner side flexible groove adopts an inner flexible groove to support a fillet.
Furthermore, a weight reduction cavity is arranged on the rigid seat.
Furthermore, the weight reduction cavities are multiple and are all arranged at the bottom of the rigid seat bearing ring and are uniformly distributed along the circumference.
Furthermore, M bonding tables are uniformly distributed on the inner wall of the flexible wall along the circumference;
n external connecting seats are uniformly distributed on the outer wall of the flexible wall along the circumference.
Further, said M is equal to 4;
said N is equal to 4.
Furthermore, the weight reducing cavities are 4, and the 4 weight reducing cavities and the 4 external connecting seats are circumferentially arranged in a staggered mode.
Furthermore, the inner side surface of the bonding table is an arc surface matched with the side wall of the infrared cold light optical lens.
Further, the infrared cold optical lens is made of single crystal germanium or zinc selenide;
the low-temperature adhesive is low-temperature epoxy adhesive;
the flexible supporting structure and the rigid seat of the cold optical lens are both made of titanium alloy or invar steel materials.
Compared with the prior art, the invention has the following beneficial effects:
1. the infrared cold light optical lens assembly with the multi-flexible supporting structure adopts a plurality of uniformly distributed bonding ring surfaces (bonding tables) for bonding the infrared cold optical lens, each bonding ring surface is provided with a glue injection hole, low-temperature epoxy glue is filled between the bonding ring surface and the infrared cold light optical lens, and the deformation and the thermal stress of the lens are directly released through a glue layer; flexible structures (external flexible structures) are designed on two sides of each bonding ring surface, the flexible structures are arc-shaped, and the deformation and the thermal stress of the infrared cold optical lens are released again through flexible sheets (flexible walls) on the common circumference; the outer side of the cold optical lens flexible supporting frame (cold optical lens flexible supporting structure) is provided with a plurality of flexible external connecting seats which are uniformly distributed, each external connecting seat separates a flexible wall from an external connecting through hole through an external flexible structure on the external connecting seat, and deformation and thermal stress between the lens component and other components are released through a flexible groove. The primary thermal stress release is realized through the low-temperature adhesive layer, and the secondary thermal stress release of the lens is realized through the flexible structure; a third thermal stress relief is achieved by the outer flexible slot.
2. The infrared cold light optical lens assembly with the multiple flexible supporting structures solves the problem of severe lens deformation of a cold light medium-low temperature infrared optical system caused by large temperature difference between processing assembly and actual working environment through the flexible structures.
3. The infrared cold light optical lens assembly with the multiple flexible supporting structures provided by the invention can adjust the flexibility of the supporting structures of the lenses with different sizes and different materials by adjusting the size of the bonding ring surface (bonding surface), the number of bonding points, the thickness of the flexible sheet and the width of the flexible wall of the external flexible groove, thereby realizing the deformation requirements of different lenses.
4. According to the infrared cold optical lens assembly with the multiple flexible supporting structures, the multiple flexible infrared cold optical lens supporting structures are made of titanium alloy or invar steel materials, and have good rigidity and toughness, and the flexible structures can be well machined.
5. According to the infrared cold light optical lens component with the multiple flexible supporting structures, the multiple flexible infrared cold light optical lens supporting structures are directly bonded with the low-temperature infrared optical lens, and the processing difficulty and the debugging and assembling difficulty of the flexible supporting structures are reduced.
Drawings
FIG. 1 is a schematic diagram of an IR-luminescent optical lens assembly with multiple flexible support structures according to the present invention;
FIG. 2 is a half-sectional view of an infrared-luminescent optical lens assembly with multiple flexible support structures according to the present invention;
FIG. 3 is a schematic diagram of a flexible support structure for an infrared luminescent lens assembly with multiple flexible support structures according to the present invention;
FIG. 4 is a schematic diagram of a rigid housing structure for an infrared-luminescent optical lens assembly with multiple flexible support structures according to the present invention;
FIG. 5 is a schematic diagram of an outer flexible structure of an infrared-luminescent optical lens assembly with multiple flexible support structures in accordance with the present invention;
description of the reference numerals:
the structure comprises an infrared cold light optical lens 1, a cold light optical lens 2, a flexible supporting structure, a rigid base 3, an external connecting piece 4, an adhesive table 2-1, a flexible wall 2-2, an external connecting base 2-3, an external connecting through hole 2-4, an external flexible structure 2-5, an adhesive injection hole 2-6, a rigid base bearing ring 3-1, an external connecting threaded hole 3-2, a weight reducing cavity 3-3, an external flexible groove 2-5-1, an internal flexible groove 2-5-2, a flexible wall 2-5-3, an internal flexible groove supporting fillet 2-5-4 and an external flexible groove supporting fillet 2-5-5.
Detailed Description
The invention is further described below with reference to the figures and examples.
The infrared cold light optical lens assembly with multiple flexible supporting structures of the present invention, as shown in fig. 1 to 5, includes an infrared cold light optical lens 1, a cold light optical lens flexible supporting structure 2, a rigid base 3, and N external connecting members (external connecting screws) 4; the infrared cold optical lens 1 is made of single crystal germanium or zinc selenide. The cold optical lens flexible supporting structure 2 is arranged on the rigid seat 3 through N external connecting pieces 4; as shown in fig. 3, the cold optical lens flexible supporting structure 2 is an integrated piece, and includes a flexible wall 2-2, M bonding stages 2-1, and N external connection seats 2-3; m is more than or equal to 3, N is more than or equal to 2 (preferably, M is more than or equal to 4, N is more than or equal to 4); the flexible wall 2-2 is an annular wall, M bonding tables 2-1 are fixedly connected to the inner wall of the flexible wall 2-2, and N external connecting seats 2-3 are fixedly connected to the outer wall of the flexible wall 2-2; m bonding tables 2-1 are uniformly distributed on the inner wall of the flexible wall 2-2 along the circumference; n external connecting seats 2-3 are uniformly distributed on the outer wall of the flexible wall 2-2 along the circumference; the M bonding tables 2-1 are provided with radial glue injection holes 2-6; the N external connecting seats 2-3 are respectively provided with an axial external connecting through hole 2-4 and an external flexible structure 2-5 which can be buffered along the radial direction; the rigid seat 3 comprises a rigid seat bearing ring 3-1; as shown in fig. 4, the upper surface of the rigid seat bearing ring 3-1 is provided with N external connection threaded holes 3-2 corresponding to the N external connection through holes 2-4; the N external connecting screws 4 respectively penetrate through the N external connecting through holes 2-4 to be connected with the N external connecting threaded holes 3-2; the inner side surface of the bonding table 2-1 is an arc surface matched with the side wall of the infrared cold light optical lens 1, and M bonding tables are bonded with the infrared cold light optical lens 1 through low-temperature glue. As shown in fig. 5, the outer flexible structure 2-5 includes an outer flexible groove 2-5-1 and an inner flexible groove 2-5-2; the outer flexible groove 2-5-1 and the inner flexible groove 2-5-2 are both of a structure with an opening at one side and a closed opening at the other side; one side of the opening of the outer flexible groove 2-5-1 is positioned on one side wall of the outer connecting seat 2-3; one side of the opening of the inner flexible groove 2-5-2 is positioned on the other side wall of the outer connecting seat 2-3; a flexible wall 2-5-3 is formed between the inner side wall of the outer flexible groove 2-5-1 and the outer side wall of the inner flexible groove 2-5-2. One closed side of the outer flexible groove 2-5-1 adopts an outer flexible groove to support a fillet 2-5-5; and one closed side of the inner side flexible groove 2-5-2 adopts an inner flexible groove to support the fillet 2-5-4.
A weight reduction cavity 3-3 is arranged on the rigid seat 3; a plurality of weight reducing cavities 3-3 are arranged at the bottom of the rigid seat bearing ring 3-1 and are uniformly distributed along the circumference.
Specifically, the method comprises the following steps:
the infrared cold light optical lens assembly with the multiple flexible supporting structures comprises an infrared cold optical lens 1, a cold light optical lens flexible supporting structure 2, a rigid base 3 and an external connecting screw 4; the infrared cold optical lens 1 is made of infrared glass such as single crystal germanium or zinc selenide; the cold optical lens flexible supporting structure 2 is bonded with the infrared cold optical lens 1 through low-temperature glue, and the bonded lens component is arranged on the rigid base 3 through an external connecting screw 4; the cold optical lens flexible supporting structure 2 comprises a bonding table 2-1, a flexible wall 2-2, an external connecting seat 2-3, an external connecting through hole 2-4, an external flexible groove 2-5 and a glue injection hole 2-6; the cold optical lens flexible supporting structure 2 is integrally manufactured, is fixedly bonded with the infrared cold optical lens 1 through 4 bonding tables 2-1 which are uniformly distributed at 360 degrees, and is connected with the rigid seat 3 through 4 external connecting through holes 2-4 which are uniformly distributed at 360 degrees; the bonding table 2-1 is a square annular surface and is directly bonded with the infrared cold light optical lens 1, glue is injected through the glue injection holes 2-6, and stress is released through the flexible wall 2-2; the external connecting seats 2-3 comprise 4 connecting tables which are uniformly distributed at 360 degrees, each connecting table is provided with an external connecting through hole 2-4, and each connecting table is connected with the flexible wall 2-2 through an external flexible groove 2-5; the external flexible grooves 2-5 comprise external flexible grooves 2-5-1, internal flexible grooves 2-5-2, flexible walls 2-5-3, internal flexible groove support fillets 2-5-4 and external flexible groove support fillets 2-5-5; the rigid seat 3 comprises a rigid seat bearing ring 3-1, an external connecting threaded hole 3-2 and a rigid seat weight reduction cavity 3-3; the rigid seat 3 is connected with the cold optical lens flexible supporting structure 2 through 4 external connection threaded holes 3-2.
4 weight-reducing cavities 3-3 are arranged, and the 4 weight-reducing cavities and the 4 external connecting seats 2-3 are arranged in a staggered mode along the circumference.
The invention adopts 4 uniformly distributed bonding ring surfaces (bonding tables 2-1) to bond the infrared cold light optical lens 1, each bonding ring surface is provided with a glue injection hole 2-6, low-temperature epoxy glue (DW-3, DW-4, 2216, 8217 and the like) is filled between the bonding ring surface and the infrared cold light optical lens 1, and the deformation and the thermal stress of the lens are directly released through the glue layer; flexible structures (external flexible structures 2-5) are designed on two sides of each bonding ring surface, the flexible structures are in an arc shape, 4 flexible structures are arranged on the same circumference, and the deformation and the thermal stress of the infrared cold optical lens 1 are released again through flexible sheets (flexible walls 2-5-3); the outer side of the luminescence lens flexible supporting frame (luminescence lens flexible supporting structure 2) is provided with 4 flexible external connecting seats 2-3 which are uniformly distributed, each external connecting seat 2-3 separates the flexible wall 2-2 from an external connecting through hole 2-4 through an external flexible structure 2-5 on the external connecting seat, and deformation and thermal stress between the lens component and other components are released through a flexible groove. The release of the primary thermal stress is realized through the low-temperature adhesive bonding layer, and the release of the secondary thermal stress of the lens is realized through the flexible structure; a third thermal stress relief is achieved by the outer flexible slot.
The invention solves the problem of severe lens deformation of a low-temperature infrared optical system in cold optics due to large temperature difference between processing assembly and actual working environment through a flexible structure. For the lenses with different sizes and different materials, the flexibility of the supporting structure of the lens can be adjusted by adjusting the size of the bonding ring surface (bonding surface), the number of bonding points, the thickness of the flexible sheet and the width of the flexible wall of the external flexible groove, so that the deformation requirements of different lenses are met.
The multi-flexible infrared cold optical lens support structure is made of titanium alloy or invar steel materials, has good rigidity and toughness, and can well realize the processing of a flexible structure.
The multi-flexible infrared cold light optical lens supporting structure is directly bonded with the low-temperature infrared optical lens, so that the processing difficulty and the debugging and assembling difficulty of the flexible supporting structure are reduced.
The assembling process comprises the following steps:
after parts are processed and cleaned, a cold light optical lens flexible supporting structure consisting of a cold light optical lens flexible supporting structure 2, a rigid seat 3 and N external connecting screws 4 is horizontally placed on a mounting table, and the infrared cold light optical lens 1 is placed in a lens supporting frame (the cold light optical lens flexible supporting structure 2); injecting glue to the bonding surface through the glue injection holes 2-6; after curing, the lens assembly is connected to the rigid mount 3 by external connection screws 4 and the assembly is complete.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and it is obvious for a person skilled in the art to modify the specific technical solutions described in the foregoing embodiments or to substitute part of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions protected by the present invention.
Claims (10)
1. An infrared-cold-light optical lens assembly with multiple flexible support structures, comprising:
comprises an infrared cold optical lens (1), a cold optical lens flexible supporting structure (2), a rigid seat (3) and N external connecting pieces (4); n is more than or equal to 2;
the cold optical lens flexible supporting structure (2) is arranged on the rigid seat (3) through N external connecting pieces (4);
the cold optical lens flexible supporting structure (2) is an integrated piece and comprises a flexible wall (2-2), M bonding tables (2-1) and N external connecting seats (2-3); m is more than or equal to 3;
the flexible wall (2-2) is an annular wall, M bonding platforms (2-1) are fixedly connected to the inner wall of the flexible wall (2-2), and N external connecting seats (2-3) are fixedly connected to the outer wall of the flexible wall (2-2);
the M bonding tables (2-1) are provided with radial glue injection holes (2-6);
the N external connecting seats (2-3) are respectively provided with an external flexible structure (2-5) which can be buffered along the radial direction;
m bonding tables of the cold optical lens flexible supporting structure (2) are bonded with the infrared cold optical lens (1) through low-temperature glue.
2. The infrared-luminescent optical lens assembly with multiple flexible support structures of claim 1, wherein:
the outer flexible structure (2-5) comprises an arc-shaped outer flexible groove (2-5-1) and an inner flexible groove (2-5-2);
the outer flexible groove (2-5-1) and the inner flexible groove (2-5-2) are both of a structure with one open side and one closed side;
one side of the opening of the outer flexible groove (2-5-1) is positioned on one side wall of the outer connecting seat (2-3);
one side of the opening of the inner flexible groove (2-5-2) is positioned on the other side wall of the outer connecting seat (2-3);
a flexible wall (2-5-3) is formed between the inner side wall of the outer flexible groove (2-5-1) and the outer side wall of the inner flexible groove (2-5-2);
the N outer flexible grooves (2-5-1) are positioned on the same circumference;
the N inner flexible grooves (2-5-2) are positioned on the same circumference.
3. The infrared-luminescent optical lens assembly with multiple flexible support structures of claim 2, wherein:
one closed side of the outer flexible groove (2-5-1) adopts an outer flexible groove to support a fillet (2-5-5);
and one closed side of the inner flexible groove (2-5-2) adopts an inner flexible groove to support a fillet (2-5-4).
4. The assembly according to any of claims 1 to 3, wherein:
and a weight reduction cavity (3-3) is arranged on the rigid seat (3).
5. The infrared-luminescent optical lens assembly with multiple flexible support structures of claim 4, wherein:
the weight reducing cavities (3-3) are arranged at the bottom of the rigid seat bearing ring (3-1) and are uniformly distributed along the circumference.
6. The infrared-luminescent optical lens assembly with multiple flexible support structures of claim 5, wherein:
m bonding tables (2-1) are uniformly distributed on the inner wall of the flexible wall (2-2) along the circumference;
n external connecting seats (2-3) are uniformly distributed on the outer wall of the flexible wall (2-2) along the circumference.
7. The infrared-luminescent optical lens assembly with multiple flexible support structures of claim 6, wherein:
said M is equal to 4;
said N is equal to 4.
8. The infrared-luminescent optical lens assembly with multiple flexible support structures of claim 7, wherein:
the weight reduction cavities (3-3) are 4, 4 weight reduction cavities (3-3) and 4 external connecting seats (2-3) which are arranged in a staggered mode along the circumference.
9. The infrared-luminescent optical lens assembly with multiple flexible support structures of claim 8, wherein:
the inner side surface of the bonding table (2-1) is an arc surface matched with the side wall of the infrared cold light optical lens (1).
10. The infrared-luminescent optical lens assembly with multiple flexible support structures of claim 9, wherein:
the infrared cold optical lens (1) is made of single crystal germanium or zinc selenide;
the low-temperature adhesive is low-temperature epoxy adhesive;
the flexible supporting structure (2) and the rigid seat (3) of the cold optical lens are both made of titanium alloy or invar steel materials.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111153496.2A CN115877534A (en) | 2021-09-29 | 2021-09-29 | Infrared cold light optical lens assembly with multiple flexible supporting structures |
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| CN202111153496.2A CN115877534A (en) | 2021-09-29 | 2021-09-29 | Infrared cold light optical lens assembly with multiple flexible supporting structures |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117075328A (en) * | 2023-10-16 | 2023-11-17 | 中国科学院西安光学精密机械研究所 | Polygonal reflector compliant heat elimination support assembly in laser scanner |
| CN117741901A (en) * | 2024-02-19 | 2024-03-22 | 中国科学院长春光学精密机械与物理研究所 | Flexible supporting structure of reflector |
-
2021
- 2021-09-29 CN CN202111153496.2A patent/CN115877534A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117075328A (en) * | 2023-10-16 | 2023-11-17 | 中国科学院西安光学精密机械研究所 | Polygonal reflector compliant heat elimination support assembly in laser scanner |
| CN117075328B (en) * | 2023-10-16 | 2024-01-30 | 中国科学院西安光学精密机械研究所 | Polygonal reflector compliant heat elimination support assembly in laser scanner |
| CN117741901A (en) * | 2024-02-19 | 2024-03-22 | 中国科学院长春光学精密机械与物理研究所 | Flexible supporting structure of reflector |
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