Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1989-02-17
1989-10-17
Arnold, Bruce Y.
Optics: measuring and testing
Range or remote distance finding
With photodetection
350358, 356346, 356352, G02B 2700, G02F 133, G01J 345
Patent
active
048742236
ABSTRACT:
A self-tuning optical notch filter is employed to separate coherent from noncoherent radiation in an overall beam. The presence of coherent radiation is detected, preferably with an interferometer, and the frequency of the detected coherent radiation is determined. An electrical control signal is generated with a frequency corresponding to that of the coherent radiation, and causes an optical filter to filter out the coherent radiation from the beam. In the preferred embodiment the optical filter is a Bragg cell, and the electrical control signal is applied to an electro-acoustic transducer which furnishes an acoustic control signal to the Bragg cell.
REFERENCES:
patent: 3799652 (1974-03-01), Torguet
patent: 3941456 (1976-03-01), Schilz et al.
patent: 4309108 (1982-01-01), Siebert
patent: 4443066 (1984-04-01), Freyre
patent: 4624566 (1986-11-01), Shifrin et al.
patent: 4674871 (1987-06-01), Shifrin
patent: 4682888 (1987-07-01), Welner
patent: 4743114 (1988-05-01), Crane, Jr.
A. Yariv, "Introduction to Optical Electronics," 2nd Edition, Jun. 1976, pp. 340-352.
Arnold Bruce Y.
Denson-Low W. K.
Duraiswamy V. D.
Edmondson David J.
Hughes Aircraft Company
LandOfFree
Optical notch filter for discriminating against coherent radiati does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical notch filter for discriminating against coherent radiati, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical notch filter for discriminating against coherent radiati will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1739903