CN109709633B - Double-layer micro-honeycomb-containing light shield for stray light suppression of satellite-borne optical system - Google Patents
Double-layer micro-honeycomb-containing light shield for stray light suppression of satellite-borne optical system Download PDFInfo
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Abstract
The invention relates to a stray light suppression light shield, in particular to a double-layer microcellular light shield for stray light suppression of a satellite-borne optical system. The double-layer microcellular light shield comprises a shield body wall, an inner honeycomb layer, an outer honeycomb layer, a shield bottom fixing ring and a shield top fixing ring; the inner honeycomb layer is bonded to the inner surface of the cover body wall by taking one side layer as a bonding surface; the other side layer of the inner honeycomb layer is bonded with the outer honeycomb layer, and honeycomb holes on the inner honeycomb layer and honeycomb holes on the outer honeycomb layer are kept in an opening staggered form; the inner honeycomb layer and the outer honeycomb layer are arranged in the light shield, and the upper edge and the lower edge of the inner honeycomb layer and the upper edge and the lower edge of the outer honeycomb layer are respectively connected with the cover bottom fixing ring and the cover top fixing ring. The double-layer microcellular light shield can effectively prevent stray light outside a view field from being transmitted to the inside of the optical system, and the high-resolution detection requirement of the satellite-borne optical system is met.
Description
Technical Field
The invention relates to a stray light suppression light shield, in particular to a double-layer microcellular light shield for stray light suppression of a satellite-borne optical system.
Background
The design of stray light suppression is one of the key technologies in the development process of optical systems. With the rapid development of the space optical system, the detected target signal is very weak, and the strong stray light reaching the image plane can reduce the imaging contrast and even submerge the target signal. Therefore, it is necessary to further improve the performance of the stray light suppressing structure and ensure the signal-to-noise ratio to meet the design requirements of the system with high detection capability and high resolution.
The light shield is a core component for inhibiting stray light of the space-borne optical system, and can effectively inhibit the stray light outside a visual field, such as sunlight, terrestrial gas light, moonlight and the like. Aiming at stray light outside a visual field of a visible light optical system, the stray light mainly comprises sunlight, earth gas light and the like; for stray light outside the field of view of the infrared optical system, the infrared bands of strong visible light and sunlight need to be suppressed at the same time. At present, extinction measures such as coating, light blocking ring arrangement, single-layer micro-honeycomb arrangement and the like are often adopted on the inner wall of the light shield, and the proportion of stray light entering the optical system is reduced through multiple scattering and absorption functions. In the prior art, the single-layer micro-honeycomb arranged on the inner wall of the light shield has very limited capability of inhibiting the stray light energy.
Disclosure of Invention
In order to enhance the stray light inhibition capability of the light shield, the invention discloses a double-layer microcellular light shield for stray light inhibition of a satellite-borne optical system.
A double-layer microcellular light shield for stray light suppression of a satellite-borne optical system comprises a shield body wall 1, an inner honeycomb layer 2, an outer honeycomb layer 3, a shield bottom fixing ring 4 and a shield top fixing ring 5; the inner honeycomb layer 2 is bonded to the inner surface of the cover body wall 1 by taking a side layer as a bonding surface; the other side layer of the inner honeycomb layer 2 is bonded with the outer honeycomb layer 3, and the honeycomb holes on the inner honeycomb layer 2 and the honeycomb holes on the outer honeycomb layer 3 are kept in an open staggered form; the inner honeycomb layer 2 and the outer honeycomb layer 3 are arranged in the light shield, and the upper edge and the lower edge of the inner honeycomb layer 2 and the upper edge and the lower edge of the outer honeycomb layer 3 are respectively connected with the cover bottom fixing ring 4 and the cover top fixing ring 5.
Further, in practical applications, the size and shape of the housing wall 1 are determined according to information such as the field of view of the optical system and the incidence angle of stray light. Generally, the shape of the housing wall 1 is a cylinder, a cone or a rectangular box; the inner wall surface of the housing wall 1 is coated with a high-absorption extinction coating with an absorptivity of more than 0.95.
Further, the hood wall 1 adopts a honeycomb sandwich structure to maintain the structural shape of the light hood and improve the structural rigidity.
Further, the cover body wall 1, the inner honeycomb layer 2, the outer honeycomb layer 3, the cover bottom fixing ring 4 and the cover top fixing ring 5 are all made of carbon fiber composite materials so as to meet the light weight requirement.
Further, the inner honeycomb layer 2 and the outer honeycomb layer 3 are functionally distinguished according to a stray light propagation path, and the inner honeycomb layer 2 is mainly used for absorbing; the outer honeycomb layer 3 is mainly reflective.
Further, with visible light absorptivity αsAnd the infrared absorptivity epsilon represents the coating characteristic, aiming at a visible light optical system, the inner wall surface of the outer honeycomb layer 3 is coated with low alphasMirror-reflective coating with high alpha coated on topsAbsorbing coating, the surface of the inner honeycomb layer 2 is coated with high alphasAn absorptive coating; aiming at an infrared optical system, the inner wall surface of the outer honeycomb layer 3 is coated with low alphasLow epsilon diffuse reflective coating having a high alpha coated top surfacesHigh epsilon absorption coating, high alpha is coated on the surface of the inner honeycomb layer 2sHigh epsilon absorption coating.
Furthermore, the side length of the opening of the outer honeycomb layer 3 is 3-8 mm, the wall thickness is less than 0.5mm, and the ratio of the height to the side length of the opening is 1.0-1.5; the ratio of the geometric dimensions (opening and height) of the inner honeycomb layer 2 to the outer honeycomb layer 3 is 1.0 to 1.7 times, and the wall thickness is less than 0.5 mm.
The invention has the beneficial effects that:
according to the double-layer micro-honeycomb-containing light shield for stray light suppression of the satellite-borne optical system, the transmission of stray light outside a view field to the inside of the optical system can be effectively blocked through the design of the double-layer honeycomb structure, the high-resolution detection requirement of the satellite-borne optical system is met, the suppression capability of stray light is improved to a great extent, and the light shield has a strong suppression effect. Meanwhile, the device has the characteristics of light weight, high performance, strong applicability and the like, and meets the design requirements of satellite borne; the method can be applied to a visible light system and an infrared system, the signal to noise ratio is improved, and the stray light problem of a satellite-borne optical system is solved.
Drawings
FIG. 1 is a diagram of a double-layer micro-honeycomb light shield for stray light suppression of a satellite-borne optical system;
FIG. 2 is a schematic diagram of stray light transmission suppression for a visible light optical system;
FIG. 3 is a schematic diagram of stray light transmission suppression for an infrared optical system;
(wherein, 1-cover wall; 2-inner honeycomb layer; 3-outer honeycomb layer; 4-cover bottom fixing ring; 5-cover top fixing ring; 6-stray light a; 7-stray light b; 8-stray light c; 9-stray light d; 10-stray light e; 11-stray light f; 12-stray light g)
Detailed Description
The present invention will be further described with reference to the following specific examples, but the present invention is not limited to these examples.
Example 1:
a contains the double-deck little honeycomb lens hood for stray light suppression of the satellite-borne optical system, through the combined extinction structure of the reasonable double-deck little honeycomb of application, strengthen the inhibition performance to stray light of the lens hood, reduce the proportion that stray light enters the optical system, can be applied to stray light suppression of satellite-borne optical detection systems such as the star sensor, space remote sensing camera, space telescope, etc., its structure is shown as figure 1, said contain double-deck little honeycomb lens hood include cover body wall 1, inner honeycomb layer 2, outer honeycomb layer 3, cover bottom fixed ring 4 and cover top fixed ring 5; the inner honeycomb layer 2 is bonded to the inner surface of the cover body wall 1 by taking a side layer as a bonding surface; the other side layer of the inner honeycomb layer 2 is bonded with the outer honeycomb layer 3, and the honeycomb holes on the inner honeycomb layer 2 and the honeycomb holes on the outer honeycomb layer 3 are kept in an open staggered form; the inner honeycomb layer 2 and the outer honeycomb layer 3 are arranged in the light shield, and the upper edge and the lower edge of the inner honeycomb layer 2 and the upper edge and the lower edge of the outer honeycomb layer 3 are respectively connected with the cover bottom fixing ring 4 and the cover top fixing ring 5. In practical application, the size and shape of the housing wall 1 are determined according to information such as the field of view of the optical system, the incident angle of stray light and the like. The inner wall surface of the housing wall 1 is coated with a high-absorption extinction coating with an absorptivity of more than 0.95. The inner honeycomb layer 2 and the outer honeycomb layer 3 are functionally distinguished according to a stray light propagation path, and the inner honeycomb layer 2 mainly has an absorption function; the outer honeycomb layer 3 is mainly reflective.
In the embodiment, the cover body wall 1 is in a cone-shaped structure, the side length of the opening of the outer honeycomb layer 3 is 3-8 mm, the wall thickness is less than 0.5mm, and the ratio of the height to the side length of the opening is 1.0-1.5; the ratio of the geometric dimensions (opening and height) of the inner honeycomb layer 2 and the outer honeycomb layer 3 is 1.0-1.7 times, and the wall thickness is less than 0.5 mm.
The hood wall 1 adopts a honeycomb sandwich structure to maintain the structural shape of the light hood and improve the structural rigidity. The cover body wall 1, the inner honeycomb layer 2, the outer honeycomb layer 3, the cover bottom fixing ring 4 and the cover top fixing ring 5 are all made of carbon fiber composite materials so as to meet the light requirement.
According to the function design of the stray light transmission process, aiming at the visible light optical system, the inner wall surface of the outer honeycomb layer 3 is coated with low alphasMirror-reflective coating with high alpha coated on topsAbsorbing coating, the surface of the inner honeycomb layer 2 is coated with high alphasAn absorptive coating; aiming at an infrared optical system, the inner wall surface of the outer honeycomb layer 3 is coated with low alphasLow epsilon diffuse reflective coating having a high alpha coated top surfacesHigh-epsilon absorption coating, and high alpha coating on the surface of the inner honeycomb layer 2sHigh epsilon absorption coating.
As shown in fig. 2, for the visible light optical system, the field-of-view external stray light a 6 directly irradiates the top surface of the outer honeycomb layer 3, since the top surface is coated with the high-absorption coating, the stray light energy is absorbed in a large amount, the reflected stray light energy is very small, and the reflected stray light energy can be transmitted to other double-layer microcellular combined extinction structures and further attenuated; stray light rays b 7 and c 8 irradiate the inner side of the outer honeycomb layer 3, and the inner wall surface of the outer honeycomb layer 3 is coated with low alphasThe mirror reflection coating, stray light b 7 and stray light c 8 are reflected, enter into interior honeycomb layer 2 through surface reflection, because of interior honeycomb layer 2 surface coating high absorption coating, stray light b 7 and stray light c 8 are by multiple scattering and absorption decay in interior honeycomb layer 2.
As shown in fig. 3, for the infrared optical system, the stray light d 9 outside the field of view directly irradiates the top surface of the outer honeycomb layer 3, because the top surface is coated with the high-absorption coating, the stray light energy is absorbed in a large amount, the reflected stray light energy is very small, and the stray light energy can be transmitted to other double-layer microcellular combination extinction structures and further attenuated; stray light e 10 strikes the outer honeycombThe top position of the inner side of the layer 3 is coated with low alpha due to the inner wall surface of the outer honeycomb layer 3sThe stray light e 10 is reflected by the low-epsilon diffuse reflection coating and is transmitted to the top of the light shield in the direction deviating from the optical system; stray light f 11 and stray light g 12 irradiate the bottom in the outer honeycomb layer 3, enter the inner honeycomb layer 2 through surface reflection, and are scattered and absorbed and attenuated for many times in the inner honeycomb layer 2 due to the high-absorption coating coated on the surface of the inner honeycomb layer 2.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (2)
1. The double-layer microcellular light shield for stray light suppression of a satellite-borne optical system is characterized by comprising a shield body wall (1), an inner honeycomb layer (2), an outer honeycomb layer (3), a shield bottom fixing ring (4) and a shield top fixing ring (5); the inner honeycomb layer (2) is bonded to the inner surface of the cover body wall (1) by taking one side layer as a bonding surface; the outer honeycomb layer (3) is bonded on the other side layer of the inner honeycomb layer (2), and honeycomb holes on the inner honeycomb layer (2) and honeycomb holes on the outer honeycomb layer (3) are kept in an open staggered form; the inner honeycomb layer (2) and the outer honeycomb layer (3) are arranged in the light shield, and the upper edge and the lower edge of the inner honeycomb layer (2) and the upper edge and the lower edge of the outer honeycomb layer (3) are respectively connected with the shield bottom fixing ring (4) and the shield top fixing ring (5);
the hood wall (1) adopts a honeycomb sandwich structure to maintain the structural shape of the light shield and improve the structural rigidity,
the inner wall surface of the housing wall (1) is coated with a high-absorption extinction coating with the absorptivity of more than 0.95,
the cover body wall (1), the inner honeycomb layer (2), the outer honeycomb layer (3), the cover bottom fixing ring (4) and the cover top fixing ring (5) are all made of carbon fiber composite materials,
the inner honeycomb layer (2) and the outer honeycomb layer (3) are functionally distinguished according to a stray light propagation path, and the inner honeycomb layer (2) is mainly used for absorbing; the outer honeycomb layer (3) is mainly used for reflecting;
the coating characteristics are represented by visible light absorptivity alpha s and infrared absorptivity epsilon, aiming at a visible light optical system, the inner wall surface of the outer honeycomb layer (3) is coated with a low alpha s and mirror reflection coating, the top surface of the outer honeycomb layer is coated with a high alpha s absorption coating, and the surface of the inner honeycomb layer (2) is coated with a high alpha s absorption coating; aiming at an infrared optical system, the inner wall surface of the outer honeycomb layer (3) is coated with a diffuse reflection coating with low alpha s and low epsilon, the top surface of the outer honeycomb layer is coated with an absorption coating with high alpha s and high epsilon, and the surface of the inner honeycomb layer (2) is coated with an absorption coating with high alpha s and high epsilon;
the side length of an opening of the outer honeycomb layer (3) is 3-8 mm, the wall thickness is less than 0.5mm, and the ratio of the height to the side length of the opening is 1.0-1.5; the ratio of the opening to the height of the inner honeycomb layer (2) to the outer honeycomb layer (3) is 1.0-1.7 times, and the wall thickness is less than 0.5 mm.
2. The light shield containing the double-layer micro-honeycomb for stray light suppression of the satellite-borne optical system according to claim 1, characterized in that the shape of the shield body wall (1) is a cylinder, a cone or a rectangular box.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910169009.8A CN109709633B (en) | 2019-03-06 | 2019-03-06 | Double-layer micro-honeycomb-containing light shield for stray light suppression of satellite-borne optical system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112709973B (en) * | 2020-12-31 | 2021-11-30 | 深圳市必拓电子股份有限公司 | Method for generating composite light by exciting fluorescence with laser and light path structure thereof |
| CN114166208A (en) * | 2021-10-22 | 2022-03-11 | 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） | Honeycomb piece for inhibiting stray light |
| CN114415312A (en) * | 2021-12-20 | 2022-04-29 | 北京空间机电研究所 | Lens cone structure suitable for bright background imaging condition |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191854A (en) * | 2006-11-28 | 2008-06-04 | 株式会社电装 | Optical multilayer reflector and fabry-perot interferometer with the same |
| CN102667324A (en) * | 2009-09-30 | 2012-09-12 | 克里公司 | Light emitting diode (led) lighting systems including low absorption, controlled reflectance and diffusion layers |
| WO2012148697A1 (en) * | 2011-04-25 | 2012-11-01 | Cree, Inc. | Optical arrangement for a solid-state lamp |
| CN103605252A (en) * | 2013-11-29 | 2014-02-26 | 中国科学院长春光学精密机械与物理研究所 | Integrated structure of center force bearing barrel and light shield |
| CN105396459A (en) * | 2015-12-18 | 2016-03-16 | 中国商用飞机有限责任公司 | Photocatalyst honeycomb subassembly, and photocatalyst purification device |
-
2019
- 2019-03-06 CN CN201910169009.8A patent/CN109709633B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191854A (en) * | 2006-11-28 | 2008-06-04 | 株式会社电装 | Optical multilayer reflector and fabry-perot interferometer with the same |
| CN102667324A (en) * | 2009-09-30 | 2012-09-12 | 克里公司 | Light emitting diode (led) lighting systems including low absorption, controlled reflectance and diffusion layers |
| WO2012148697A1 (en) * | 2011-04-25 | 2012-11-01 | Cree, Inc. | Optical arrangement for a solid-state lamp |
| CN103605252A (en) * | 2013-11-29 | 2014-02-26 | 中国科学院长春光学精密机械与物理研究所 | Integrated structure of center force bearing barrel and light shield |
| CN105396459A (en) * | 2015-12-18 | 2016-03-16 | 中国商用飞机有限责任公司 | Photocatalyst honeycomb subassembly, and photocatalyst purification device |
Non-Patent Citations (3)
| Title |
|---|
| 具有蜂窝内壁的遮光罩杂散光抑制特性分析;陈学;《光学学报》;20120531;第1-5页 * |
| 双层蜂窝夹层结构异形大开口遮光罩的研制;吴东奇;《制造技术研究》;20161231;第33-37页 * |
| 遮光罩内壁蜂窝结构单元的双向反射特性;陈学;《光子学报》;20120331;全文 * |
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