Optical device for measuring a doppler frequency shift

Optics: measuring and testing – By light interference – Having light beams of different frequencies

Reexamination Certificate

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Reexamination Certificate

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07580132

ABSTRACT:
The invention relates to a device for measuring a Doppler frequency shift, including an optical signal channel delivering a signal light beam illuminating a reference medium; and a reference channel delivering a reference light beam for detecting the Doppler frequency shift. The frequency shift is determined from the difference in frequency between the light signal illuminating the reference medium and the light beam returned by the reference medium. The device includes at least two light radiation sources, preferably lasers, with one light radiating source generating the light beam for the signal channel and the other source generating the light beam for the reference channel.

REFERENCES:
patent: 3950100 (1976-04-01), Keene et al.
patent: 4190362 (1980-02-01), Dubrunfaut
patent: 4515471 (1985-05-01), Eden
patent: 4886362 (1989-12-01), Oono
patent: 4902125 (1990-02-01), Keene et al.
patent: 5018151 (1991-05-01), Seaton
patent: 5082364 (1992-01-01), Russell
patent: 5110207 (1992-05-01), Harris
patent: 5141319 (1992-08-01), Kajimura et al.
patent: 2003/0075677 (2003-04-01), Halmos
patent: 2003/0151732 (2003-08-01), Rogers et al.
patent: 1043632 (2000-10-01), None
patent: 1308732 (2003-05-01), None
patent: 2818752 (2002-06-01), None
patent: 2082085 (1996-06-01), None
Toda et al, Optical Integrated Circuit for a Fiber Laser Doppler Velocimeter, Journal of Lightwave Technology, vol. LT-5, Jul. 1987, pp. 901-905.
Lin et al, Analysis and Design of Coherent Super-Heterodyne Laser Doppler Vibrometer System, IEEE-IMTC'94, May 1994, pp. 348-351.
Schwiesow et al, The NCAR Airborn Infrared Lidar System: Status and Applications, Journal of Atmospheric and Oceanic Technology, vol. 13, Feb. 1996, pp. 4-15.
Kurihara, Noboru et al. “New Optical Technique for the Generation of Quadrature Signals on Laser Doppler Velocimeter”, Nippon Kikai Gakkai Ronbunshu, B; Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B Sep. 2002, vol. 68, No. 673, Sep. 2002, pp. 2580-2585, XP002309460.

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