CN111458867A - Optical trap structure - Google Patents
Optical trap structure Download PDFInfo
- Publication number
- CN111458867A CN111458867A CN202010365295.8A CN202010365295A CN111458867A CN 111458867 A CN111458867 A CN 111458867A CN 202010365295 A CN202010365295 A CN 202010365295A CN 111458867 A CN111458867 A CN 111458867A
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- Prior art keywords
- reflector
- cylinder
- diaphragm
- optical trap
- fixed
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/003—Light absorbing elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/005—Diaphragms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The invention provides an optical trap structure, which comprises an optical trap cylinder, and a reflector component and a diffuse reflection component which are respectively fixed at two ends of the optical trap cylinder; the optical trap cylinder comprises a circular cylinder body and a diaphragm assembly accommodated and fixed in the cylinder body; the plane of one end of the cylinder body, which is used for fixing the reflector component, forms an included angle with the axial lead of the cylinder body, and the side wall of the cylinder body, which faces the reflector component, is provided with a light inlet hole; the light enters the barrel from the light inlet hole and then reaches the reflector component, and under the reflection action of the reflector component, the light passes through the diaphragm component and then reaches the diffuse reflection component. The optical trap structure provided by the invention has good light limiting performance and small occupied space.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of space remote sensing, in particular to an optical trap structure.
[ background of the invention ]
The light trap function of the inner mask type coronagraph is to eliminate sun sunlight leaked by the inner mask body, thereby playing the functions of blocking light and eliminating stray light. The optical trap structure adopted in the current coronagraph mainly comprises an inner shelter which is arranged in the central area of light and forms a certain angle, and an optical absorption groove which is used for accommodating the light reflected by the inner shelter. The reflected light rays escape from the light absorption groove after being reflected for several times, reach the inner wall of the coronagraph lens barrel and are scattered, but part of stray light possibly enters a subsequent optical system.
The light limiting performance of the scheme is good, but the curved mirror needs to be designed through a specific curvature, and the processing manufacturability is poor. The assembly of multi-cavity, many diaphragms is equipped with certain degree of difficulty, and occupation space is also great. In addition, the optical trap mechanism applied to other aspects mostly adopts a complex cavity design, so that incident light is reflected back and forth for multiple times in the optical trap to achieve the extinction purpose, but many cavities basically have no structural processing performance or have higher cost.
In view of the above, it is desirable to provide a new optical trap structure to overcome the above-mentioned drawbacks.
[ summary of the invention ]
The invention aims to provide an optical trap structure which has good light limiting performance, small occupied space and convenient assembly.
In order to achieve the above object, the present invention provides an optical trap structure, including an optical trap cylinder, and a reflector assembly and a diffuse reflection assembly respectively fixed at two ends of the optical trap cylinder; the optical trap cylinder comprises a circular cylinder body and a diaphragm assembly accommodated and fixed in the cylinder body; the surface of one end of the cylinder, which is used for fixing the reflector component, is oval, and the side wall of the cylinder, which faces the reflector component, is provided with a light inlet hole; the light enters the barrel from the light inlet hole and then reaches the reflector component, and under the reflection action of the reflector component, the light passes through the diaphragm component and then reaches the diffuse reflection component.
In a preferred embodiment, the diaphragm assembly comprises two first diaphragms and a second diaphragm positioned between the two first diaphragms, and each first diaphragm comprises a plurality of baffles which are oppositely arranged at intervals; each baffle is provided with a circular first through hole, and the diameter of the first through hole on the baffle in each first diaphragm is gradually increased from one end close to the second diaphragm to the other end; and the second diaphragm is provided with a circular second through hole, and the diameter of the second through hole is smaller than that of the first through hole on the baffle close to the second diaphragm.
In a preferred embodiment, each first diaphragm comprises a fixed cylinder receiving and fixing the plurality of baffles, the baffles being circular and having a diameter equal to an inner diameter of the fixed cylinder; the fixed cylinder is circular, and the outer diameter of the fixed cylinder is equal to the inner diameter of the cylinder body; each fixed barrel is contained in the barrel and is in clearance fit with the barrel, and the fixing piece penetrates through the barrel and the fixed barrel to realize the fixed connection of the first diaphragm and the barrel.
In a preferred embodiment, the inner surface of the cylinder is coated with a layer of matt black paint; and a dull black paint layer is coated on the surface of the baffle.
In a preferred embodiment, the mirror assembly comprises a mirror base, a mirror frame and a mirror; the mirror frame is hollow, the reflector is contained and fixed in the mirror frame, the mirror frame is fixedly connected with the mirror base through a fixing piece, and the mirror base is fixedly connected with the barrel through a fixing piece.
In a preferred embodiment, the reflector is a spherical collimating reflector, and the spherical surface of the reflector is plated with a reflecting film with the reflectivity of the working waveband not less than 90%; the reflecting mirror is a concave mirror, and the concave surface of the reflecting mirror faces the light inlet; the axis of the reflector and the axis of the cylinder are intersected at the focus of the reflector.
In a preferred embodiment, the diffuse reflection assembly comprises a diffuse reflector and a cold source connected with the diffuse reflector; the light reaching the diffuse reflection assembly irradiates the reflector and generates scattering, and the heat generated by the reflector is dissipated through the cold source.
In a preferred embodiment, the diffuse reflection assembly further comprises a mounting cylinder fixedly connected with the cylinder body; the mounting cylinder is circular and is coaxial with the cylinder body; the diffuse reflector is conical and is accommodated and fixed at one end, far away from the cylinder body, of the installation cylinder, and the diffuse reflector and the cylinder body are coaxially arranged.
In a preferred embodiment, the inner surface of the installation cylinder is coated with a layer of matt black paint; the cold source is fixed on the outer surface of the mounting cylinder.
According to the light trap structure provided by the invention, the light rays entering through the light inlet hole are reflected into the cylinder body through the reflector, part of the light rays pass through the diaphragm assembly and reach the diffuse reflector to be eliminated by the mounting cylinder, and part of the light rays cannot pass through the diaphragm assembly to be eliminated by the cylinder body and the diaphragm assembly. The optical trap structure provided by the invention has good light limiting performance and small occupied space.
[ description of the drawings ]
Fig. 1 is a cross-sectional view of an optical trap structure provided by the present invention.
Fig. 2 is a perspective view of the optical trap structure shown in fig. 1.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantageous effects of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 and 2, an optical trap structure 100 of the present invention includes an optical trap cylinder 10, and a reflector assembly 20 and a diffuse reflector assembly 30 respectively fixed at two ends of the optical trap cylinder 10.
The optical trap cylinder 10 includes a circular cylinder 11 and a diaphragm assembly 12 accommodated and fixed in the cylinder 11. The surface of the cylinder 11 at one end fixed with the reflector assembly 20 is elliptical, and a light inlet hole 101 is formed in the side wall of the cylinder 11 facing the reflector assembly 20. The light enters the barrel 11 from the light inlet hole 101 and reaches the reflector assembly 20, and then reaches the diffuse reflection assembly 30 after passing through the diaphragm assembly 12 under the reflection action of the reflector assembly 20. Part of the light rays pass through the diaphragm assembly 12 to reach the diffuse reflection assembly 30, are eliminated by the inner surface of the cylinder 11 after being reflected for multiple times by the diffuse reflection assembly 30, and the light rays which do not pass through the diaphragm assembly 12 are eliminated by the inner surface of the cylinder 11 and the inner surface of the cylinder 11.
In this embodiment, an included angle of 50 ° is formed between a plane on which the elliptical surface of the cylinder 11 is located and an axial line of the cylinder 11.
Specifically, the diaphragm assembly 12 includes two first diaphragms 121 and a second diaphragm 122 located between the two first diaphragms 121, and each first diaphragm 121 includes a plurality of baffles 1211 disposed opposite to each other at intervals. Each baffle 1211 is provided with a circular first through aperture 1201, and the diameter of the first through aperture 1201 of the baffle 1211 in each first diaphragm 121 gradually increases from one end near the second diaphragm 122 to the other end. The second diaphragm 122 is provided with a circular second through hole 1202, and the diameter of the second through hole 1202 is smaller than the diameter of the first through hole 1201 of the baffle 1211 close to the second diaphragm 122. The arrangement of the diaphragm assembly 12 is used for screening the light reaching the diffuse reflection assembly 30, eliminating the stray light which cannot reach the diffuse reflection assembly 30 and improving the light limiting performance; on the other hand, compared with the existing optical trap structure, the volume of the cylinder 11 is reduced, the assembly is convenient, and the occupied space of the optical trap structure 100 is reduced.
Each first diaphragm 121 includes a fixed cylinder 1212 receiving and fixing the plurality of baffles 1211, the baffles 1211 having a circular shape and a diameter equal to an inner diameter of the fixed cylinder 1212. The fixed cylinder 1212 is circular and has an outer diameter equal to the inner diameter of the cylinder 11. Each fixed barrel 1212 is accommodated in the barrel 11 and is in clearance fit with the barrel 11, and a fixing member, such as a screw, penetrates through the barrel 11 and the fixed barrel 1212 to fixedly connect the first diaphragm 121 and the barrel 11.
Further, the inner surface of the cylinder 11 is coated with a dull black paint layer; the surface of the baffle 1211 is coated with a dull black paint layer for eliminating stray light and preventing the stray light from escaping.
In this embodiment, the number of the baffles 1211 in each first diaphragm 121 is two, and the structure is simple and practical. It will be appreciated that in other embodiments, the number of baffles 1211 in each first diaphragm 121 may be greater to meet higher light requirements.
In this embodiment, the mirror assembly 20 includes a mirror base 21, a mirror frame 22, and a mirror 23. The mirror frame 23 is hollow, the mirror 23 is accommodated and fixed in the mirror frame 22, the mirror frame 22 is fixedly connected to the mirror base 21 by a fixing member such as a screw, and the mirror base 21 is fixedly connected to the cylinder 11 by a fixing member such as a screw. During assembly, the circumference of the mirror frame 22 is coated with a silicon rubber film, the ring surfaces of the mirror frame 22 and the reflector 23 are bonded through epoxy resin glue, the components of the mirror frame 22 and the reflector 23 are placed in a dry environment, and the mirror frame 22 and the mirror base 21 are connected through screws after the glue layers are cured.
Further, the reflector 23 is a spherical collimating reflector, and the spherical surface of the reflector 23 is coated with a reflective film having a reflectivity of not less than 90% of a working waveband. The reflecting mirror 23 is a concave mirror, and the concave surface of the reflecting mirror 23 faces the light inlet 101. And the axis of the reflector 23 intersects with the axis of the barrel 11 at the focal point of the reflector 23, so that the light reflected by the reflector 23 passes through the diaphragm assembly 12 as much as possible. In this embodiment, the axis of the reflector 23 and the axis of the cylinder 11 form an included angle of 40 °.
In this embodiment, the diffuse reflection assembly 30 includes a diffuse reflector 31 and a cold source 32 connected to the diffuse reflector 31. The light reaching the diffuse reflection assembly 30 is irradiated onto the reflector 31 and scattered, and the heat generated by the reflector 31 is dissipated through the heat sink 32. The reflector 31 reflects a large amount of light to eliminate a large amount of heat, and the diffuse reflector 31 is connected to the cold source 32 to prevent the light trap structure 100 from being damaged due to an excessively high temperature of the light trap structure 100.
Furthermore, the diffuse reflection assembly 30 further includes a mounting tube 33 fixedly connected to the barrel 11. The mounting cylinder 33 is circular and is coaxial with the cylinder 11. The diffuse reflector 31 is conical and is accommodated and fixed at one end of the installation cylinder 33 far away from the cylinder body 11, and the diffuse reflector 31 and the cylinder body 11 are coaxially arranged, so that light rays are uniformly dispersed and reflected to all directions under the action of the diffuse reflector 31.
The inner surface of the mounting cylinder 33 is coated with a layer of matting black paint for eliminating the light reflected by the diffuse reflector 31. The cold source 32 is fixed on the outer surface of the mounting cylinder 33, so that the heat transfer of the cold source 32 is facilitated.
In the optical trap structure 100 provided by the present invention, the light entering through the light inlet 101 is reflected into the cylinder 11 by the reflector 21, a part of the light passes through the diaphragm assembly 12 and reaches the diffuse reflector 31, and then is eliminated by the installation cylinder 33, and a part of the light fails to pass through the diaphragm assembly 12 and is eliminated by the cylinder 11 and the diaphragm assembly 12. The optical trap structure 100 provided by the invention has the advantages of good light limiting performance, small occupied space and convenience in assembly.
The invention is not limited solely to that described in the specification and embodiments, and additional advantages and modifications will readily occur to those skilled in the art, so that the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.
Claims (9)
1. An optical trap structure, characterized by: the device comprises a light trap cylinder, and a reflector component and a diffuse reflection component which are respectively fixed at two ends of the light trap cylinder; the optical trap cylinder comprises a circular cylinder body and a diaphragm assembly accommodated and fixed in the cylinder body; the surface of one end of the cylinder, which is used for fixing the reflector component, is oval, and the side wall of the cylinder, which faces the reflector component, is provided with a light inlet hole; the light enters the barrel from the light inlet hole and then reaches the reflector component, and under the reflection action of the reflector component, the light passes through the diaphragm component and then reaches the diffuse reflection component.
2. The optical trap structure of claim 1, wherein: the diaphragm assembly comprises two first diaphragms and a second diaphragm positioned between the two first diaphragms, and each first diaphragm comprises a plurality of baffles which are oppositely arranged at intervals; each baffle is provided with a circular first through hole, and the diameter of the first through hole on the baffle in each first diaphragm is gradually increased from one end close to the second diaphragm to the other end; and the second diaphragm is provided with a circular second through hole, and the diameter of the second through hole is smaller than that of the first through hole on the baffle close to the second diaphragm.
3. The optical trap structure of claim 2, wherein: each first diaphragm comprises a fixed cylinder for accommodating and fixing the plurality of baffles, and the baffles are circular and have the diameter equal to the inner diameter of the fixed cylinder; the fixed cylinder is circular, and the outer diameter of the fixed cylinder is equal to the inner diameter of the cylinder body; each fixed barrel is contained in the barrel and is in clearance fit with the barrel, and the fixing piece penetrates through the barrel and the fixed barrel to realize the fixed connection of the first diaphragm and the barrel.
4. The optical trap structure of claim 3, wherein: the inner surface of the cylinder is coated with a delustering black paint layer; and a dull black paint layer is coated on the surface of the baffle.
5. The optical trap structure of claim 1, wherein: the reflector component comprises a reflector base, a reflector frame and a reflector; the mirror frame is hollow, the reflector is contained and fixed in the mirror frame, the mirror frame is fixedly connected with the mirror base through a fixing piece, and the mirror base is fixedly connected with the barrel through a fixing piece.
6. The optical trap structure of claim 5, wherein: the reflector is a spherical collimating reflector, and the spherical surface of the reflector is plated with a reflecting film with the reflectivity of a working waveband not less than 90%; the reflecting mirror is a concave mirror, and the concave surface of the reflecting mirror faces the light inlet; the axis of the reflector and the axis of the cylinder are intersected at the focus of the reflector.
7. The optical trap structure of claim 1, wherein: the diffuse reflection assembly comprises a diffuse reflector and a cold source connected with the diffuse reflector; the light reaching the diffuse reflection assembly irradiates the reflector and generates scattering, and the heat generated by the reflector is dissipated through the cold source.
8. The optical trap structure of claim 7, wherein: the diffuse reflection assembly also comprises an installation cylinder fixedly connected with the cylinder body; the mounting cylinder is circular and is coaxial with the cylinder body; the diffuse reflector is conical and is accommodated and fixed at one end, far away from the cylinder body, of the installation cylinder, and the diffuse reflector and the cylinder body are coaxially arranged.
9. The optical trap structure of claim 8, wherein: the inner surface of the mounting cylinder is coated with a delustering black paint layer; the cold source is fixed on the outer surface of the mounting cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010365295.8A CN111458867A (en) | 2020-04-30 | 2020-04-30 | Optical trap structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010365295.8A CN111458867A (en) | 2020-04-30 | 2020-04-30 | Optical trap structure |
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| Publication Number | Publication Date |
|---|---|
| CN111458867A true CN111458867A (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010365295.8A Pending CN111458867A (en) | 2020-04-30 | 2020-04-30 | Optical trap structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418600A (en) * | 2021-06-21 | 2021-09-21 | 中国电子科技集团公司第四十一研究所 | Optical fiber type short wave infrared light trap detector and detection method |
| CN113686428A (en) * | 2021-08-27 | 2021-11-23 | 西安应用光学研究所 | Low-temperature radiometer absorption cavity |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2708337Y (en) * | 2004-06-17 | 2005-07-06 | 中国科学院安徽光学精密机械研究所 | Light trapping device for laser |
| CN101704417A (en) * | 2009-12-04 | 2010-05-12 | 武汉华中天经光电系统有限公司 | Stray light suppression device for star tracker of spacecraft |
| CN103345061A (en) * | 2013-05-17 | 2013-10-09 | 中国科学院长春光学精密机械与物理研究所 | High-precision diaphragm slit for eliminating converging light and stray light |
| US20140226215A1 (en) * | 2013-02-13 | 2014-08-14 | Seiko Epson Corporation | Virtual image display device |
| CN105092219A (en) * | 2015-09-21 | 2015-11-25 | 上海卫星工程研究所 | System-level stray light test unit attenuator |
| CN109633897A (en) * | 2018-12-25 | 2019-04-16 | 中国科学院长春光学精密机械与物理研究所 | A kind of light trapping structure |
-
2020
- 2020-04-30 CN CN202010365295.8A patent/CN111458867A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2708337Y (en) * | 2004-06-17 | 2005-07-06 | 中国科学院安徽光学精密机械研究所 | Light trapping device for laser |
| CN101704417A (en) * | 2009-12-04 | 2010-05-12 | 武汉华中天经光电系统有限公司 | Stray light suppression device for star tracker of spacecraft |
| US20140226215A1 (en) * | 2013-02-13 | 2014-08-14 | Seiko Epson Corporation | Virtual image display device |
| CN103345061A (en) * | 2013-05-17 | 2013-10-09 | 中国科学院长春光学精密机械与物理研究所 | High-precision diaphragm slit for eliminating converging light and stray light |
| CN105092219A (en) * | 2015-09-21 | 2015-11-25 | 上海卫星工程研究所 | System-level stray light test unit attenuator |
| CN109633897A (en) * | 2018-12-25 | 2019-04-16 | 中国科学院长春光学精密机械与物理研究所 | A kind of light trapping structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418600A (en) * | 2021-06-21 | 2021-09-21 | 中国电子科技集团公司第四十一研究所 | Optical fiber type short wave infrared light trap detector and detection method |
| CN113686428A (en) * | 2021-08-27 | 2021-11-23 | 西安应用光学研究所 | Low-temperature radiometer absorption cavity |
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Application publication date: 20200728 |