Invention Grant
US09482853B2 Afocal telescope configured as three or four mirror anastigmat for back-scanned imagery 有权
非焦距望远镜配置为三个或四个镜像反射扫描图像

Afocal telescope configured as three or four mirror anastigmat for back-scanned imagery
Abstract:
An afocal telescope configured for back-scanned imagery including a three mirror anastigmat and an optical element positioned proximate an intermediate image plane of the three mirror anastigmat and configured to adjust distortion characteristics of the afocal telescope to control image wander on a focal plane array. The optical element may be a field correcting lens or mirror, for example.
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