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1. (WO2018139949) HIGH-RESOLUTION OPTICAL REMOTE SENSING TELESCOPE FOR MICRO-SPACECRAFT

Pub. No.:    WO/2018/139949    International Application No.:    PCT/RU2017/000182
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Thu Mar 30 01:59:59 CEST 2017
IPC: G02B 23/06
G02B 17/08
G02B 7/182
Applicants: LIMITED LIABILITY COMPANY "DAURIA - SATELLITE TECHNOLOGY"
ОБЩЕСТВО С ОГРАНИЧЕННОЙ ОТВЕТСТВЕННОСТЬЮ "ДАУРИЯ - СПУТНИКОВЫЕ ТЕХНОЛОГИИ"
Inventors: TUMARINA, Maria Matveevna
ТУМАРИНА, Мария Матвеевна
RYAZANSKIY, Mikhail Vladimirovich
РЯЗАНСКИЙ, Михаил Владимирович
MILOV, Alexander Evgenievich
МИЛОВ, Александр Евгеньевич
Title: HIGH-RESOLUTION OPTICAL REMOTE SENSING TELESCOPE FOR MICRO-SPACECRAFT
Abstract:
The invention relates to optics and space technology, and more particularly to electron optical remote sensing telescopes suitable for use on micro-spacecraft. An optical telescope comprises an optical arrangement of a mirror-lens axial lens with a non-circular aperture, said arrangement including a converging input lens, a primary concave mirror-lens, a secondary convex mirror, and a prefocal two-lens corrector. The secondary convex mirror is situated directly at the centre of the input lens so that the image plane is located close to the rear surface of a fastening system of the primary mirror. The prefocal two-lens corrector is situated at the centre of the primary mirror-lens. Internal shades are mounted in the primary mirror-lens and the secondary mirror. The optical telescope further comprises an optomechanical structure consisting of side posts, a frame, and, mounted on said frame, a holder of the primary mirror-lens, the prefocal two-lens corrector and the shade of the primary mirror-lens. The prefocal two-lens corrector is situated inside the holder. The primary mirror-lens and the shade of the primary mirror-lens are fastened to the outside of the holder. An input lens-secondary mirror assembly and a primary mirror-lens-prefocal two-lens corrector assembly are connected by the side posts. At the primary mirror-lens end, the side posts are fastened to the frame. At the input lens end, the side posts are fastened to an input lens holder. The secondary mirror is fastened to the input lens by a holder of the secondary mirror and the shade of the secondary mirror. The optical telescope further comprises a photodetector of an electron sensor, said photodetector being situated directly behind the prefocal corrector in the focus of the optical arrangement, and being fastened to the outer face of the holder of the primary mirror-lens. The invention allows highly detailed imaging of the Earth's surface using an optical telescope located onboard a micro-spacecraft of the CubeSat 16U variety.