A three-mirror optical system for a large-field survey telescope

Abstract

The invention discloses a three-lens optical system of a large-visual-field synoptic survey telescope. The three-lens optical system of the large-visual-field synoptic survey telescope comprises a main lens, an auxiliary lens, a light filter and a light shielding system, and further comprises a third reflecting lens, a first corrector, a second corrector and a third corrector, wherein the light shielding system comprises a three-lens light shielding cover, an auxiliary light shielding cover and a lens cone; a main lens central hole is formed in the middle of the main lens; the third reflectinglens is positioned in the main lens central hole; the three-lens light shielding cover is positioned on the left side of the third reflecting lens and is hermetically connected with the third reflecting lens; the auxiliary lens is positioned on the left sides of the main lens and the three-lens light shielding cover; the auxiliary lens light shielding cover is positioned on the right side of theauxiliary lens and is hermetically connected with the auxiliary lens; an auxiliary lens central hole is formed in the middle of the auxiliary lens; the lens cone is positioned on the left side of theauxiliary lens central hole; the right end of the lens cone is hermetically connected with the periphery of the auxiliary lens central hole in the middle of the auxiliary lens; and the inside of the lens cone is successively hermetically connected with the first corrector, the second corrector, the light filter and the third corrector from right to left. High requirements for large visual field, broadband, high flux, high ultraviolet transmittance and the like can be met.

Description

technical field [0001] The invention relates to an optical system of an astronomical optical telescope, in particular to a three-mirror optical system of a large-field survey telescope. Background technique [0002] The pre-research work of our national 2.5 large-field survey telescope project has started. The telescope aims at the international frontier and strives to build the most advanced survey telescope in the northern hemisphere. However, the optical system design is the bottleneck in the design of large-field survey telescopes, and it is also the core key technology. It is related to important parameters such as the telescope's field of view and imaging quality, and also determines the overall appearance of the telescope. It is also the key to the telescope's structural design and cost control. Important reference. The design schemes adopted by the existing optical telescopes in the world cannot meet the requirements of the new generation of large field of view sky...

AI Technical Summary

Problems solved by technology

The design scheme adopted by the existing optical telescopes in the world cannot meet the high requirements of the new generation of large-field survey telescopes with large field of view, wide band, high light flux, and high ultraviolet transmittance.

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