Variable spectral resolution agile filter

Details Variable spectral resolution agile filter Variable spectral resolution agile filter

1993-11-12

1995-09-19

Epps, Georgia Y.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359261, 359263, 359317, 359320, 356346, 356352, G02F 129, G02F 103, G01B 902

Patent

active

054521211

ABSTRACT:
A variable spectral resolution agile filter has instantly adjustable spectral resolution with no required mechanical motion and a quickly adjustable center wavelength. Adjustment of the center wavelength is accomplished by reliable piezoelectric actuators. Adjustment of the spectral resolution is achieved by changing the finesse of the system, the finesse being governed by the reflectivity of the faces. By making one of the faces exhibit electrically variable reflectivity, the finesse of the system is instantly changeable, and thus the spectral resolution is also instantly changeable.

REFERENCES:
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patent: 4923273 (1990-05-01), Taylor
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patent: 4998017 (1991-03-01), Ryan et al.
patent: 4999013 (1991-03-01), Zoechbauer et al.
T. Morokuma, "Coherence of Light Filtered by Fabry-Perot Etalons," Jun., 1967, pp. 737-745, Japanese Journal of Applied Physics.
P. D. Henshaw et al., "Digital Beam Switch for Agile Beam Laser Radar," MIT, Massachusetts, SPIE, vol. 202, 1979.
G. Indebetouw, "Tunable Spatial Filtering with a Fabry-Perot Etalon," Applied Optics, pp. 761-764, vol. 19, No. 4, Mar. 1, 1980.

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