FIVE-MIRROR AFOCAL WIDE FIELD OF VIEW OPTICAL SYSTEM

摘要

A five-mirror all-reflective afocal anastigmat. In one example, a five mirror afocal anastigmat includes five mirrors arranged to sequentially reflect from one another electromagnetic radiation received via a system entrance pupil to produce a collimated output beam of the electromagnetic radiation at a system exit pupil, the five mirrors consisting of three positive-powered mirrors and two negative-powered mirrors, wherein optical powers of the five mirrors are balanced to achieve a flat field condition at the system exit pupil.

主权项

1. A five mirror all-reflective afocal optical system comprising:
a positive-powered primary mirror arranged and configured to receive and reflect collimated electromagnetic radiation received via an entrance pupil of the afocal optical system; a negative-powered second mirror arranged and configured to receive and further reflect the electromagnetic radiation reflected from the primary mirror; a positive-powered third mirror arranged and configured to receive and further reflect the electromagnetic radiation reflected from the secondary mirror; a negative-powered fourth mirror arranged and configured to receive and further reflect the electromagnetic radiation reflected from the tertiary mirror to form an intermediate image; and a positive-powered fifth mirror configured to receive and re-collimate the electromagnetic radiation reflected from the quaternary mirror and to reflect the re-collimated electromagnetic radiation through an exit pupil of the afocal optical system.