1976-04-02
1980-02-12
Sikes, William L.
G02F 111
Patent
active
041880960
ABSTRACT:
An acousto-optical transducer which includes a pair of mirrors of high reflectivity arranged in parallel to form an etalon. A laser beam enters the etalon at a small angle of incidence through a window and after suffering many reflections at the etalon mirrors exits at the second window. The reflected beam carries the information imposed by an acoustic pressure wave which affects the position of the etalon mirrors. The reflected laser beam of changed frequency due to the doppler shift caused by the motion of the etalon mirrors relative to the source of the incident laser beam is then used to beat with a light of a fixed frequency by using the heterodyne technique. Alternatively, an additional mirror is used which is generally perpendicular to the etalon mirrors and facilitates the reflections at the etalon mirrors for the ultimately reflected beam.
REFERENCES:
patent: 3470329 (1969-09-01), Young
Ingard et al., Flexible-Membrane Fabry-Perot Interferometer. Amer. J. Phy vol. 35, No. 3 (Mar. 1967), p. 285.
Lall Prithvi C.
McGill Arthur A.
Sciascia Richard S.
Sikes William L.
The United States of America as represented by the Secretary of
LandOfFree
Acousto-optical transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Acousto-optical transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acousto-optical transducer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1852744