1983-03-25
1986-04-15
Corbin, John K.
350358, G02B 530, G02F 133, G02F 111
Patent
active
045823979
ABSTRACT:
An electronically tunable optical filter using acousto-optic interaction in a dispersive birefrigent crystal. The strong wavelength dispersion of birefringence in a class of uniaxial semiconductors near the band gap is utilized to enhance the spectral resolution of the tunable acousto-optic filter. The dispersive tunable acousto-optic filter provides a very large aperture while maintaining an extremely narrow bandwidth.
REFERENCES:
patent: 3679288 (1972-07-01), Harris
patent: 3953107 (1976-04-01), Yano et al.
patent: 4052121 (1977-10-01), Chang
patent: 4500178 (1985-02-01), Yeh
Harris et al., "Acousto-Optic Tunable Filter", Jun. 1969, 744-747, Journal of the Optical Society of America, vol. 59, No. 6.
Chang, "Noncollinear Acoustu-Optic Filter with Lame Angular Aperture", Applied Physics Letters, Oct. 1974, vol. 25, pp. 370-372.
Yano et al., "New Non-Collinear Acousto-Optic Tunable Filter Using Birefringence in Paratellurne", Applied Physics Letters, Mar. 1974, vol. 24, p. 256-257.
Chang, "Acousto-Optic Tunable Filters", Optical Engineering, Nov. 1981, vol. 20, No. 6, pp. 824-829.
Yeh, "Zero Crossing Birefringent Filters", Optics Communications, Oct. 1980, vol 35, No. 1, pp. 15-19.
Chandrasetiharan et al., "Anomalous Dispersion of Birepinsence of Sapphire and Magnesium Fluoride in the Vacuum Ultraviolet", Applied Optics, vol. 8, No. 3, Mar. 1969, pp. 671-675.
Corbin John K.
Shapiro Bruce S.
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