Varying bandpass of optical spatial filter by rotating mirrors h

Details Varying bandpass of optical spatial filter by rotating mirrors h Varying bandpass of optical spatial filter by rotating mirrors h

1982-01-06

1984-05-15

Arnold, Bruce Y.

Optics: measuring and testing

Range or remote distance finding

With photodetection

350166, 356352, G02B 528, G01B 902

Patent

active

044484860

ABSTRACT:
In a system of real-time coherent optical filtering of visual imagery having a Fabry-Perot interferometer for use as a variable bandpass spatial filter, the improvement of having the pair of mirrors of the interferometer mounted in spaced parallel relationship to one another for rotation about a common axis. The mirrors each have a reflectivity value which changes as a function of rotation. Thus, the bandwidth of the interferometer in acting as a filter can be adjusted by merely rotating one or both of the mirrors.

REFERENCES:
patent: 3459467 (1969-08-01), Kantor
patent: 3915573 (1975-10-01), Knoll et al.
patent: 4152674 (1979-05-01), Taguchi
Indebetouw, G., "Tunable Spatial Filtering with a Fabry-Perot Etalon", Applied Optics, Mar. 1, 1980, vol. 19, No. 5, pp. 761-764.

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