Catadioptric device intended for an optical responder

Details Catadioptric device intended for an optical responder Catadioptric device intended for an optical responder

1980-09-24

1982-12-21

Henry, Jon W.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

350294, 455605, G02B 1706, H04B 900

Patent

active

043646310

ABSTRACT:
A retro-reflector which comprises two spherical mirrors, namely a concave main mirror and a convex secondary mirror, which are coaxial to one another and whose respective radii are in the ratio 2:1, the secondary mirror facing and being spaced from the main mirror by a distance at the most equal to its radius. Means are provided for forming a circular pupil centered on the center of curvature of the main mirror and a regulatable diaphragm positioned in front of the secondary mirror. An optoelectrical shutter can be positioned in the pupil to modulate the reflected beam and provide the optical responder function.

REFERENCES:
patent: 2737850 (1956-03-01), Ratiere
patent: 3049054 (1962-08-01), Waland
patent: 3180217 (1965-04-01), Argyle et al.
patent: 3433960 (1969-03-01), Minott
patent: 3493294 (1970-02-01), Fitzmaurice et al.
patent: 3748015 (1973-07-01), Offner
patent: 4064434 (1977-12-01), Waksberg
patent: 4097125 (1978-06-01), Suzuki
patent: 4134008 (1979-01-01), Corlieu et al.
Navy Tech. Dis. Bull., vol. 3, No. 7, Jul. 1978, pp. 9-10.

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