A Large Aperture and Long Focal Length Imaging Optical System for Stitching Mirror Experiments

Abstract

The invention provides a large-aperture long-focal-length imaging optical system oriented to splicing mirror experiments, which includes a convex mirror assembly arranged coaxially in sequence, and a front lens for correcting spherical aberration produced by the concave mirror assembly and the convex mirror assembly. group, the concave mirror assembly and the rear lens group for correcting the spherical aberration introduced by the participation and the chromatic aberration introduced by the front lens group, both sides of the convex mirror assembly are optical surfaces, the concave mirror assembly The front surface is an optical surface and is a concave surface, the rear surface of the concave mirror assembly is a non-optical surface, and the concave mirror assembly adopts splicing junctions, which not only can have the index system characteristics of astronomical telescopes such as large apertures and long focal lengths, Moreover, all optical surfaces adopt spherical design to minimize the difficulty of manufacturing, with good imaging quality and low manufacturing cost.

Description

technical field [0001] The invention relates to the field of optical lens and optical design, in particular to a large-aperture long-focus imaging optical system for splicing mirror experiments. Background technique [0002] With the continuous development of optical engineering technology, the demand for telescope resolution and light collection ability in astronomical observation continues to rise. According to the principle of optics, only by continuously increasing the aperture of the telescope can we meet the demand for observing distant and faint celestial bodies. [0003] Traditional integral primary mirror telescopes (such as the "Hubble" space telescope) are limited by factors such as optical manufacturing capabilities, and there is no room for further improvement in their calibers. At present, the whole world is making every effort to develop space-based / ground-based telescopes with spliced ​​primary mirrors, such as the James Webb Space Telescope (JWST) with a dia...

AI Technical Summary

Problems solved by technology

However, in the spliced ​​primary mirror, the high-precision confocal and common phase between the sub-mirrors have always been the key issues restricting the development of the spliced ​​primary mirror telescope.

[0005] Common total reflection astronomical telescopes mostly adopt Cassegrain structure or R-C structure. Both of these common structures have aspheric mirrors. The processing cost is relatively high, which is not conducive to cost control.

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