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A method for forming an organic-inorganic combination hood for a remote sensing camera

A technology of remote sensing camera and molding method, applied in 3D object support structure, additive manufacturing, manufacturing tools, etc., can solve problems such as weak combination, increased cost, and low dimensional accuracy

Active Publication Date: 2020-11-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose an organic-inorganic combination method for forming a hood for a remote sensing camera, which is simple, efficient, and highly reliable, and realizes "3D printing integration" and "simultaneous preparation of 3D printing technology and spraying technology" The integrated rapid prototyping of the organic-inorganic hybrid high light-absorbing hood effectively solves the defects of poor structural stability and low dimensional accuracy brought about by the split preparation process, and also effectively avoids the poor bonding caused by spraying paint after the hood is formed. It can meet the requirements of geostationary orbit (GEO) remote sensing camera due to problems such as firmness and additional cost increase

Method used

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  • A method for forming an organic-inorganic combination hood for a remote sensing camera
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  • A method for forming an organic-inorganic combination hood for a remote sensing camera

Examples

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Effect test

example 1

[0055] Example 1: A PEEK shading mask formed by spraying without a spray gun. The organic substrate is PEEK. The molding temperature is controlled at 420°C, the speed is 25mm / s, and the extrusion volume is 120%. Under these conditions, a shading with an absorption rate of 95.83% is obtained. cover, such as Figure 7 shown.

example 2

[0056] Example 2: PEEK is used as the base material of the organic light shield, and the carbon black solution (40mg / mL) with ethanol as the solvent is used as the inorganic black paint. The 3D printing head and the spray gun are coaxially linked to prepare a square light shield with a four-sided honeycomb structure on the inner wall, and the molding temperature is controlled. 420°C, speed of 25mm / s, extrusion rate of 120%, spraying flow rate of 8mL / h, and spraying angle of 35°. Under these conditions, the microcosmic surface is rough and evenly loaded with carbon black. High absorption and high mechanical stability A unique one-piece high-performance hood, which has an absorption rate of 98.21% under this condition, such as Figure 8 shown. In addition, the obtained light shield has high dimensional accuracy, which can meet the requirements for the use of geostationary orbit (GEO) remote sensing cameras.

example 3

[0057] Example 3: The organic base material is PEEK, the inorganic black paint is carbon black solution (30mg / mL) with ethanol as solvent, the molding temperature is controlled at 420°C, the speed is 25mm / s, the extrusion volume is 120%, and the spraying flow rate is 8mL / mL. h, the spraying angle is 35°, and under this condition, a light shield with an absorption rate of 97.15% is obtained, such as Figure 9 shown.

[0058] The invention adopts 3D printing technology and spraying technology to prepare the shading cover synchronously, rapid prototyping, good structural stability, high dimensional accuracy, firm combination of the shading cover and the inorganic black paint, and good shading performance.

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Abstract

The invention provides a forming method of an organic-inorganic combined light shield for a remote sensing camera, and belongs to the field of stray light suppression of space optical systems. The problems of poor structural stability, low size accuracy, discontinuous preparation process and the like caused by split type preparation and subsequent re-spraying treatment of an existing light shieldare solved. A high-performance organic polymer is used as a light shield body material; more excellent stray light elimination capability of the light shield is realized by utilizing a high-light-absorption inorganic material; a 3D printing head is used for forming the organic light shield body, and inorganic black paint is synchronously sprayed by a spray gun linked with the 3D printing head, souniform loading of inorganic black paint on the surface of the rough organic light absorption substrate is realized in the process of spraying while beating; by means of waste heat on the surface of aprinted piece, a solvent in the inorganic black paint dispersion liquid is rapidly volatilized, firm combination of inorganic black paint and an organic matrix is achieved, the organic-inorganic combined light shield is obtained, and the use requirement of a geostationary orbit remote sensing camera is met.

Description

technical field [0001] The invention belongs to the field of suppression of stray light in a space optical system, and in particular relates to a method for forming an organic-inorganic combined light shield for a remote sensing camera. Background technique [0002] Geostationary orbit (GEO) remote sensing cameras need to have extremely high temporal resolution and moderate spatial resolution, as well as multi-spectral imaging capabilities, in order to meet the extensive needs of users such as disaster reduction, forestry and meteorology, but the existence of stray light makes its sensitivity greatly disturbed. Stray light refers to the radiation energy of other non-target light rays that diffuse on the surface of the detector in addition to the target light rays in the optical system. The existence of stray light will reduce the signal-to-noise ratio of target imaging, blur target imaging, and reduce contrast, thereby reducing the recognition and detection capabilities of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C64/118B29C64/314B29C64/379B33Y10/00B33Y40/10B33Y40/20B33Y70/10B33Y80/00B29K71/00
CPCB29C64/118B29C64/314B29C64/379B29K2071/00B33Y10/00B33Y40/00B33Y70/00B33Y80/00
Inventor 吴晓宏卢松涛秦伟李杨
Owner HARBIN INST OF TECH
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