Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1982-09-29
1985-04-02
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250226, 356352, 356416, 350387, G02F 103
Patent
active
045089647
ABSTRACT:
Disclosed is an apparatus for removing electromagnetic energy at a wavelength .lambda. from a beam of electromagnetic energy. Included is an electro-optically tunable Fabry-Perot filter, with an electro-optic crystal having parallel incident and exit surfaces, a first transparent electrode on the incident surface, a second transparent electrode on the exit surface, an incident reflecting layer, and an exit reflecting layer. A detector produces an electrical signal in response to the electromagnetic energy transmitted by the filter. A lock-in amplifier receives the electrical signal and outputs to a control amplifier which also receives as an input a source of alternating current. A high voltage amplifier receives the output of the control amplifier and applies its output across the electro-optic crystal.
REFERENCES:
patent: 3699347 (1972-10-01), Buchan et al.
patent: 3700902 (1972-10-01), Buchan
patent: 4095099 (1978-06-01), Ehrenhaft
patent: 4314743 (1982-02-01), Rast
De Angelis, et al., Electro-Optic Interference Filter Light Modulator, Proc. IEEE, vol. 51, p. 1258, (1963).
Smith, et al., Electrooptic Nonlinear Fabry-Perot Devices, IEEE J. Quant. Mech., vol. QE-14, No. 3, p. 207, (Mar. 1978).
Sohler, Optical Bistable Device as Electro-optical Multivibrator, Appl. Phys. Lett. 36(5), p. 351, (Mar. 1, 1980).
Gunning, III William J.
Tracy John M.
Deinken John J.
Hamann H. Fredrick
Malin Craig O.
Rockwell International Corporation
Westin Edward P.
LandOfFree
Electro-optically tuned rejection filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electro-optically tuned rejection filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electro-optically tuned rejection filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1092493