Optical lock-in detection technique for coherent detection appli

Details Optical lock-in detection technique for coherent detection appli Optical lock-in detection technique for coherent detection appli

1996-01-11

1998-10-20

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

2502082, 250226, 356346, G01J 300

Patent

active

058250182

ABSTRACT:
An optical lock-in detection technique and circuit for coherent applications employing a photo-detector having a symmetric I-V curve is presented. The detection circuit includes a photo-detector operating as an optical lock-in amplifier, and a modulation source. The technique and circuit are used for coherent detection applications such as the determination of the frequency of modulation of an optical signal or the determination of the presence of an optical signal at a specified frequency. The technique and circuit are also used with one or more charge coupled devices in imaging applications.

REFERENCES:
patent: 4042829 (1977-08-01), Atkinson
patent: 4260883 (1981-04-01), Onoda et al.
patent: 4637723 (1987-01-01), Egli et al.
patent: 4668860 (1987-05-01), Anthon
patent: 4856899 (1989-08-01), Iwaoka et al.
patent: 4890925 (1990-01-01), Kitamori et al.
patent: 4907237 (1990-03-01), Dahmani et al.
patent: 4972331 (1990-11-01), Chance
patent: 5015095 (1991-05-01), Hollinger et al.
patent: 5075793 (1991-12-01), Schiffner
patent: 5122974 (1992-06-01), Chance
patent: 5135307 (1992-08-01), de Groot et al.
patent: 5260772 (1993-11-01), Pollak et al.
patent: 5280341 (1994-01-01), Monnenmacher et al.
patent: 5311284 (1994-05-01), Nishino
patent: 5321502 (1994-06-01), Matsumoto et al.
patent: 5347359 (1994-09-01), Hutchings et al.
patent: 5408327 (1995-04-01), Geiler et al.
patent: 5548124 (1996-08-01), Takeshima et al.

Affiliated with

Also associated with

Rating

Optical lock-in detection technique for coherent detection appli 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 lock-in detection technique for coherent detection appli, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical lock-in detection technique for coherent detection appli will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-247071