Patent ID: 11921432
Assignee: THALES
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical system with variable focal distance within a predetermined focal distance range, comprising:
two mirrors, each mirror defining a reflective surface and having a length extending along a major axis, a thickness extending substantially perpendicular to the major axis and the reflective surface, and a width extending substantially perpendicular to the length and thickness;
a KB mechanical assembly comprising two supports adapted to support the mirrors one after the other along their principal axis so as to form a propagation path of the same incident radiation at a grazing angle with respect to the reflecting surface of each of the mirrors;
wherein each mirror has a useful portion whose width and/or thickness is (are) variable and selected according to the said predetermined distance range, and wherein, for each mirror, the system further comprises a deformation mechanism adapted to generate a curvature of the corresponding mirror along its length to adjust the focal distance within said predetermined distance range.