Tunable optical filter with white state

Details Tunable optical filter with white state Tunable optical filter with white state

1997-08-07

1999-04-06

Epps, Georgia

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359245, 359252, 359256, 359320, G02F 103, G02F 129

Patent

active

058926127

ABSTRACT:
A switchable optical birefringent filter for polarized light incident thereon includes first and second retarder networks in optical series and a switch associated with at least one of the first and second retarder networks for selectively altering one of the polarization state and the angular orientation of the polarization state relative to the angular orientation of the second network, of light as it is received by the second network. In one operating mode, the filter produces a spectral filtration of light passing through the filter and in another mode transmits all light within a specified range of wavelengths without significant alteration.

REFERENCES:
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patent: 4582396 (1986-04-01), Bos et al.
patent: 5247378 (1993-09-01), Miller
patent: 5528393 (1996-06-01), Sharp et al.
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"Optical Network Synthesis Using Birefrigerent Crystals. IV. Synthesis of Lossless Double-Pass Networks", 56 J. Opt. Soc. Am. (7), 952(1966), by E.O. Amman.
"Synthesis of Optical Birefrigerent Networks", Progress in Optics IX 1971, pp. 123-177 (North-Holland, Amerstand) by E.O. Amman.
"Flat Passband Birefrigerent Wavelength Domain Multiplexer", 25 Electronics Letters 106-7 (1987), by W.J. Carlssen and C.F. Buhrer.
"A New RGB Tunable Filter Technology" 2650 Proc. of S.P.I.E., 98 (1996), by Sharp and Johnson.
"Synthesis and Tuning of High-Order Solc-Type Birefrigerent Filters", 33 Applied Optics 2249-54 (1994).
"The Birefrigerent Filter", 39 J. Opt. Soc. Am. 229-42 (1949).
"Achromatic Combinations of Half-Wave Plates", 49 J. Opp. Soc. Am. 405-409 (1959).

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