Method and apparatus for improving the angular aperture of an ao

Details Method and apparatus for improving the angular aperture of an ao Method and apparatus for improving the angular aperture of an ao

1988-02-16

1989-12-12

Laroche, Eugene R.

G02F 111

Patent

active

048863467

ABSTRACT:
A method and apparatus for increasing the angular aperture of an acousto-optic dispersive light filter in which acoustic frequencies of differing frequencies are launched into a crystal at differing angles to each other. Input light phase matches with corresponding ones of the acoustic frequencies so that the angular aperture is enlarged.

REFERENCES:
patent: 3729250 (1973-04-01), Kustere et al.
patent: 3729251 (1973-04-01), Hearn
patent: 3759603 (1973-09-01), Eschler
patent: 3928814 (1975-12-01), Feichtner
patent: 4040722 (1977-08-01), Nielson
patent: 4110016 (1978-08-01), Berg et al.
patent: 4206347 (1980-06-01), Avicola
patent: 4602852 (1986-07-01), Moroz
patent: 4639092 (1987-01-01), Gottlieb
patent: 4653869 (1967-03-01), Gottlieb
I. C. Chang, "Acousto-Optic Devices and Applications," IEEE Trans. on Sonics and Ultrasonics, vol. SU-23, No. 1, pp. 2-21, Jan. 1976.
Gogglieb et al., Electro Optic and Acoustic Optic Scanning and Deflection, Marcel, Dekker, 1985, at, for example p. 110, Equations 6.24 and 6.25.

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