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Infrared Telescope Objective System by 조용준 is a document available to read on EtoBox.

This patent describes a telescope objective system for the infrared range that is achromatic and has a telephoto form. The system consists of three lens elements aligned along a common optical axis, with a planar image surface. The primary lens element is positively powered germanium. The secondary lens has two lens elements that are substantially spherical. At least one secondary lens element is made of a chalcogenide glass to make the system achromatic in the infrared wavelength region. The effective foca

Author

조용준

Language

EN