Optical system for thermal imager

Abstract

The invention relates to an optical system with mirrors for an image sensor, comprising two symmetrical concave mirrors (20a, 20b) arranged in the same plane and having parallel optical axes (Oa, Ob); and an image sensor array (24) arranged in front of the mirrors and having two opposing edges which are respectively substantially adjacent to the optical axes of the two mirrors. The image sensor can be attached to an opaque mask (28) comprising, on the periphery of the image sensor, an entrance pupil (26) in front of each mirror (20), contained in the surface of the mirror extending beyond the image sensor.

Dependencies are inferred from the claim text.