All-reflective field-switching optical imaging system

Details All-reflective field-switching optical imaging system All-reflective field-switching optical imaging system

1999-04-28

2000-07-04

Spyrou, Cassandra

Optical: systems and elements

Mirror

Plural mirrors or reflecting surfaces

359851, 359364, 359366, G02B 508

Patent

active

060847271

ABSTRACT:
An all-reflective field-switching optical imaging system includes an optical beam coincident with an optical axis and forming a nominal pupil, a pupil-reimaging mirror array spatially separated from the optical axis and having an incident beam with a first pupil the same size as the nominal pupil and an output beam with a second pupil, and a beam diverter mirror array controllably movable between a first position where the beam diverter mirror array does not intercept the optical axis and does not divert the optical beam, and a second position where the beam diverter mirror array intercepts the optical axis and diverts the optical beam. The beam diverter mirror array has a first beam diverter mirror positioned so as to direct the optical beam to the pupil-reimaging mirror array as its incident beam, when the first beam diverter mirror intercepts the optical axis, and a second beam diverter mirror positioned so as to receive the output beam from the pupil-reimaging mirror array and reflect the output beam so as to be coaxial with the optical axis and with the second pupil lying at the pupil plane so as to be concentric and coplanar with a location of the nominal pupil when the beam diverter mirror array is in the first position, when the second beam diverter mirror intercepts the optical axis.

REFERENCES:
patent: 3674334 (1972-07-01), Offner
patent: 5106196 (1992-04-01), Brierley

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