Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-09-21
1992-09-08
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25023119, 73705, 358 12, H01J 4014
Patent
active
051460831
ABSTRACT:
A fiber optic microphone is provided for measuring fluctuating pressures. An optical fiber probe having at least one transmitting fiber for transmitting light to a pressure-sensing membrane and at least one receiving fiber for receiving light reflected from a stretched membrane is provided. The pressure-sensing membrane may be stretched for high frequency response. Further, a reflecting surface of the pressure-sensing membrane may have dimensions which substantially correspond to dimensions of a cross section of the optical fiber probe. Further, the fiber optic microphone can be made of materials for use in high temperature environments, for example greater than 1000.degree. F. A fiber optic probe is also provided with a backplate for damping membrane motion. The backplate further provides a means for on-line calibration of the microphone.
REFERENCES:
patent: 3580082 (1971-05-01), Strack
patent: 3789667 (1974-02-01), Porter et al.
patent: 3831137 (1974-08-01), Cuomo
patent: 3903497 (1975-09-01), Stimler et al.
patent: 3940608 (1976-02-01), Kissinger et al.
patent: 4098031 (1978-07-01), Hartman et al.
patent: 4149423 (1979-04-01), Zuckerwar et al.
patent: 4158310 (1979-06-01), Ho
patent: 4210029 (1980-07-01), Porter
patent: 4258508 (1981-03-01), Wilson et al.
patent: 4286468 (1981-09-01), Altman
patent: 4310905 (1982-01-01), Palmer
patent: 4329017 (1982-05-01), Kapany et al.
patent: 4354735 (1982-10-01), Stowe et al.
patent: 4363115 (1982-12-01), Cuomo
patent: 4446543 (1984-05-01), McLandrich et al.
patent: 4473747 (1984-09-01), Brogardh et al.
patent: 4512113 (1985-04-01), Budinger
patent: 4547668 (1985-10-01), Tsikos
patent: 4550975 (1985-11-01), Levinson et al.
patent: 4599711 (1986-07-01), Cuomo
patent: 4687927 (1987-08-01), Iwamoto et al.
patent: 4926696 (1990-05-01), Haritonidis et al.
patent: 4932263 (1990-06-01), Wlodarczyk
Frank W. Cuomo, "Pressure and Pressure Gradient Fiber-Optic Lever Hydrophones" J. Acoust. Soc. Am. 73(5), May 1983, pp. 1848-1857.
ICIASF '89 Record--International Congress on Instrumentation in Aerospace Simulation Facilities, IEEE Publication 89CH2762-3, pp. 503-509, Sep. 1989.
Allan J. Zuckerwar, "Theoretical Response of Condenser Microphones" J. Acoust. Soc. Am. 64(5), Nov. 1978, pp. 1278-1285.
Cuomo Frank W.
Hopson, Jr. Purnell
Robbins William E.
Zuckerwar Allan J.
Le Que T.
Nelms David C.
Osborne Kevin B.
The United States of America as represented by the Administrator
LandOfFree
High temperature fiber optic microphone having a pressure-sensin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High temperature fiber optic microphone having a pressure-sensin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High temperature fiber optic microphone having a pressure-sensin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-135923