Sparse-aperture pupil structure

Abstract

The invention relates to a sparse-aperture pupil structure, which consists of 9 sub-apertures with the same diameter, wherein the circle centers of three sub-apertures are equally distributed on the periphery of a circle A, and the circle centers of other six sub-apertures are equally distributed on the periphery of a circle B; the circle A and the circle B are concentric circles, and the radius ratio is 2:3; the connecting lines of the circle centers of the three sub-apertures distributed on the periphery of the circle A form an equilateral triangle; angular bisectors of angles of the equilateral triangle respectively pass through a circle center O and extend to be intersected with the periphery of the circle B at points M1, M2 and M3; and every two of the six sub-apertures distributed on the periphery of the circle B form a group, an included angle formed between the connecting lines of the circle centers of two sub-apertures in each group and the circle center O is 20 DEG, and OM1, OM2 and OM3 are angular bisectors of the three included angles respectively; and a fill factor F of the structure is more than 0 and less than or equal to 19.7 percent. The structure is simple; the sub-apertures are easy to assemble; and modulation transfer functions (MTF) are uniformly distributed to form a regularhexagon, the resolution is high, and the imaging property is good.

Description

technical field [0001] The invention relates to a sparse aperture pupil structure in a high-resolution optical remote sensor in the field of space remote sensing. Background technique [0002] With the development of science and technology, aerospace remote sensing technology has been widely used in the development of astronomical observation, remote sensing and military investigation and other fields. It is gradually becoming one of the most important means for people to obtain various spatial information, discover and identify targets, and for countries to grasp the initiative of information. [0003] Countries around the world have invested a lot of manpower and material resources in the research and development of space remote sensing technology. Among the many space remote sensors that have been developed, the optical remote sensor is always the most important and the most important type of remote sensor. The use of optical remote sensors mounted on satellites for ear...

AI Technical Summary

Problems solved by technology

However, space optical remote sensors used for remote sensing and reconnaissance purposes generally do not have a fixed observation target, and the system modulation transfer function needs to respond continuously to the spatial frequency from a low frequency to a certain high frequency to form a uniform frequency Responsive overlay

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