Imaging optical system FOR EARTH OBSERVATION

摘要

An imaging optical system for earth observation according to the present invention comprises at least three mirrors along an optical path from an incident part to a light receiving part. Here, the imaging optical system for earth observation includes a first mirror composed of a reflector with an elliptic surface, which transfers light emitted to the incident part to the inside of the optical system; a second mirror which reflects light emitted from the first mirror and is composed of a reflector with a hyperbolic surface; and a third mirror which reflects light emitted from the second mirror and emits it to the light receiving part, and is composed of a reflector with an elliptic surface. It is possible to obtain High SNR.