Five mirror, two perpendicular plane image derotator

Details Five mirror, two perpendicular plane image derotator Five mirror, two perpendicular plane image derotator

1988-09-01

1990-05-29

Arnold, Bruce Y.

350500, G02B 2610, G02B 2764

Patent

active

049290401

ABSTRACT:
An image derotator (10) uses five or a higher odd number of) mirrors mounted in two perpendicular planes. When used in scanning systems (14) that result in image rotation, the derotator (10) will derotate the image, thereby maintaining a constant image orientation. In addition, the derotator (10) permits a controlled amount of polarization sensitivity to be achieved, by adjusting the angles between the mirrors. Zero polarization sensitivity can also be achieved by proper adjustment of mirror angles.

REFERENCES:
patent: 4103991 (1978-08-01), Kramer
patent: 4160956 (1979-09-01), Ivie
patent: 4202597 (1980-05-01), Moore
patent: 4469404 (1984-09-01), Taira
"Pevhan Derotation Prism-Application & Alighment Notes", Optical Engineering, Nov./Dec. 1974, vol. 13, No. 6. pp. 6233-6234.

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