Large aperture binary optical thin film primary mirror imaging system and its application

Abstract

The invention relates to a large-aperture binary optical film primary mirror imaging system, which belongs to the technical field of remote sensing optical system design and image quality analysis. The imaging system of the large-aperture binary optical film primary mirror is composed of a binary optical film primary mirror, a narrow-band filter and an image plane. The light radiation is collected by the binary optical film primary mirror and converged to the surface of the narrow-band filter. The opaque area in the center of the light sheet blocks the direct transmitted light from the central cavity of the primary mirror, and the light-transmitting area performs narrow-band filtering on all the light collected by the primary mirror, and the filtered light irradiates the image surface and is received by the CCD to form an electronic image data. The optical system of the invention can be used as a space telescope to obtain high-resolution remote sensing images. The binary optical primary mirror of the present invention can be processed by thin-film materials, and is very light in weight; the binary optical thin-film primary mirror can be kept in a folded state during the satellite launching process, and can be unfolded into a plane after being launched into orbit, which has low requirements on the caliber of the launch vehicle .

Description

technical field [0001] The invention belongs to the technical field of remote sensing optical system design and image quality analysis, and relates to a large-diameter binary optical film primary mirror imaging system and its application. Background technique [0002] In order to improve the resolution of remote sensing satellites, foreign countries began to develop new optical imaging technologies at the end of the 20th century, including space-block expandable mirror technology, sparse aperture imaging technology and diffraction imaging technology. [0003] Space block deployable technology requires lightweight primary mirror, strict lens surface shape control, precise deployment mechanism, and wavefront sensing and control mechanism. These technical difficulties reduce the feasibility of this technology. Due to the requirement of the same phase of each sub-aperture in the sparse-aperture imaging technology, the position accuracy of the sub-system needs to be controlled wi...

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Problems solved by technology

On the other hand, the weight of the block-deployable imaging system and the sparse-aperture imaging system is still very large, which puts strict requirements on the supporting structure and the launch device, so the research progress is slow

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