Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Reexamination Certificate
2007-11-27
2007-11-27
Tarcza, Thomas H. (Department: 3662)
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
Reexamination Certificate
active
10490863
ABSTRACT:
This invention relates to a gas velocity sensor such as an air velocity sensor for use on an aircraft such that the velocity of the aircraft can be determined. There is provided a gas velocity sensor comprising an electromagnetic radiation source operable to illuminate a gas; a photodetector operable to detect electromagnetic radiation scattered from the gas; an optical path linking the gas to the photodetector; an interferometer positioned on the optical path, the interferometer having an input for receiving electromagnetic radiation scattered by the gas and an output for producing an interference pattern when the interferometer is illuminated; and a spatial filter positioned on the optical path on the output side of the interferometer, the spatial filter having regions that are relatively transparent and relatively opaque that form a structure corresponding to an interference pattern produced by the interferometer.
REFERENCES:
patent: 4195931 (1980-04-01), Hara
patent: 4400975 (1983-08-01), McGarr
patent: 4818101 (1989-04-01), Soreide et al.
patent: 5088815 (1992-02-01), Garnier et al.
patent: 5172181 (1992-12-01), Morbieu et al.
patent: 5317376 (1994-05-01), Amzajerdian et al.
patent: 5394243 (1995-02-01), de Mollerat du Jeu
patent: 5642194 (1997-06-01), Erskine
patent: 5701009 (1997-12-01), Griffiths et al.
patent: 6040899 (2000-03-01), Breda
patent: 6313908 (2001-11-01), McGill et al.
patent: 0 009 533 (1980-04-01), None
patent: 0 083 162 (1983-07-01), None
H. Mocker et al, “Laser Doppler Optical Air-Data System: Feasibility Demonstration and Systems Specifications”Applied Optics, vol. 33, No. 27, Sep. 1994, pp. 6457-6471.
Bae Systems plc
Ratcliffe Luke D.
Tarcza Thomas H.
LandOfFree
Gas velocity sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gas velocity sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas velocity sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3846677