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Sparse aperture pupil structure and its design optimizing method

A technology of sparse aperture and optimization method, which is applied in the field of space remote sensing, can solve the problems of difficulty in manufacturing and detecting large-aperture mirrors, high cost, and large volume of remote sensors, and achieve the optimization of sparse aperture pupil structure, improvement of imaging quality, The effect of structural flexibility

Inactive Publication Date: 2009-06-03
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult and costly to manufacture and inspect large-aperture mirrors, which will lead to large volume and heavy weight of the remote sensor, which will bring great difficulties to the development and launch of the remote sensor, and even make it impossible to realize

Method used

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  • Sparse aperture pupil structure and its design optimizing method
  • Sparse aperture pupil structure and its design optimizing method
  • Sparse aperture pupil structure and its design optimizing method

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Embodiment 1

[0028] See attached figure 2 , a sparse aperture pupil structure described in this embodiment is composed of 9 identical sub-mirrors with a diameter of d, and its distribution structure is as follows: the connecting lines of the centers of each sub-mirror form an equilateral triangle, each of the equilateral triangles The connecting line between the sub-mirror on the vertex and the center of the adjacent sub-mirror forms three identical small equilateral triangles, and the diameter D of the sparse aperture pupil is the diameter of the circumscribed circle of the sub-mirror on each vertex of the equilateral triangle , according to the design requirements, D=500mm, according to the design optimization method of the sparse aperture pupil structure of the present invention, the design fill factor is F=20%, then the diameter d=74.5mm of the sub-mirror, in the sparse aperture pupil structure , the distance s between the sub-mirror on each vertex of an equilateral triangle and the c...

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Abstract

The invention is applicable to optical sensor in high resolution in space remote sensing area. The structure of sparse aperture pupils is composed of 9 pieces of sub mirror with identical diameter. The distribution structure is as following: connecting line passing through center of each sub mirror forms a equilateral triangle; a sub mirror located at each vertex of the equilateral triangle, and together with centers of the adjacent sub mirrors constitutes a small equilateral triangle. Thus, there are three pieces of identical small equilateral triangle. Space between sub mirrors and fill factor are adopted and controlled by the optimized method. Features are: flexible structure of sparse aperture pupils, easy of installation and adjustment, better improving imaging quality of optical system.

Description

technical field [0001] The invention relates to a sparse aperture pupil structure and a design optimization method thereof in a high-resolution optical remote sensor in the field of space remote sensing. Background technique [0002] The spatial resolution of a spaceborne optical remote sensing system is one of the main indicators to measure its performance. The angular resolution of the remote sensor optical system is the ratio of the working wavelength λ to the entrance pupil diameter D, that is, δ=λ / D, indicating that only large aperture optical systems can have high spatial resolution. However, it is difficult and costly to manufacture and test large-aperture mirrors, which will lead to large volume and heavy weight of the remote sensor, which will bring great difficulties to the development and launch of the remote sensor, and even cannot be realized at all. Therefore, the study of sparse-aperture systems has developed accordingly. The sparse aperture pupil structure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/481G01S17/89
Inventor 吴泉英钱霖沈为民姚庆香高雪萍
Owner SUZHOU UNIV