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High-precision diaphragm slit for eliminating converging light and stray light

A stray light, high-precision technology, applied in the field of high-precision aperture slits, can solve problems such as low efficiency, poor universality, and large waste of time, economy, and cost, so as to reduce the level of stray light and improve signal-to-noise than the effect

Inactive Publication Date: 2013-10-09
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of research on shading systems, most of them use special design methods for different optical devices, which are not universally applicable, require a large number of redundant designs, take up a lot of space and are not efficient, and waste a lot of time and economic costs.

Method used

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  • High-precision diaphragm slit for eliminating converging light and stray light
  • High-precision diaphragm slit for eliminating converging light and stray light

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Experimental program
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Effect test

Embodiment Construction

[0010] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0011] Such as figure 1 As shown, the high-precision aperture slit used to eliminate the stray light of converging light, the aperture slit is composed of a hollow cylinder shell 1 and a louver partition 2, and the louver partition 2 is arranged inside the hollow cylinder shell 1 and coaxial placement.

[0012] The louver partition 2 is made up of one group of partition sheets, and the number of partition sheets can be 11, 13 or 15. Each partition sheet has a central hole, and with the center of the central partition sheet as the symmetrical center, the apertures of the central holes of the partition sheets on both sides decrease in proportion to form a biconical incident cavity; the hollow cylindrical shell 1 and the partition slice coaxial. The sides of the hollow cylindrical shell 1 and each barrier sheet are sprayed with a diffuse reflection blackening...

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Abstract

The invention, which belongs to the technical field of stray light elimination, relates to a high-precision diaphragm slit for eliminating converging light and stray light, thereby solving problems existing in the existing stray light elimination technology. A technical scheme of the high-precision diaphragm slit is characterized in that the diaphragm slit comprises a hollow cylindrical housing and grille barriers that are arranged inside the hollow cylindrical housing. The grille barriers include a set of barrier sheets; each of the barrier sheets has a central hole; and the central hole of the central barrier sheet is used as a symmetrical center and apertures of the central holes of the barrier sheets at the two sides are gradually reduced to form a biconical incident cavity. The hollow cylindrical housing and all the barrier sheets are coaxially arranged; and diffuse reflection blackening materials with stable performances are sprayed at surfaces of the hollow cylindrical housing and all the barrier sheets. According to the invention, the provided high-precision diaphragm slit can be especially used for eliminating stray lights in a spatial optical remote sensing instrument.

Description

technical field [0001] The invention relates to a high-precision diaphragm slit for eliminating stray light of converging light, and belongs to the technical field of stray light elimination. Background technique [0002] Stray light is a general term for abnormally transmitted light in an optical system, resulting from light leakage, residual reflection from transmitted optical surfaces, residual reflection from phenanthrene optical surfaces such as the inner wall of the lens barrel, and scattered light due to optical surface quality problems. General stray light has a harmful effect on the optical system, and its direct impact is to reduce the contrast of the image plane, reduce the signal-to-noise ratio of the image plane, and may produce spots on the image plane, resulting in a decrease in image quality and even system failure. . In particular, space optical remote sensing instruments have very high requirements on the level of stray light, and it is particularly import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G02B5/00G02B5/02
Inventor 王玉鹏赵维宁方伟
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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