Optics: measuring and testing – Range or remote distance finding – With photodetection
Reexamination Certificate
2007-09-25
2007-09-25
Tarcza, Thomas H. (Department: 3662)
Optics: measuring and testing
Range or remote distance finding
With photodetection
C356S004010, C356S004100
Reexamination Certificate
active
10510983
ABSTRACT:
In a laser detecting and ranging apparatus in which a light signal is intensity-modulated with a modulating frequency consisting of a frequency in the microwave band for thereby detecting a Doppler frequency relating to the modulating frequency, high reception sensitivity is realized.The apparatus comprises a light transmitting unit for transmitting a light signal from a light source1as a transmitted beam L1into the atmosphere, a light receiving means for receiving a light beam L2from the atmosphere as a received light, an oscillator10for outputting a modulating signal having at least one modulating frequency as a carrier frequency, and a signal processing unit12for detecting properties of the atmosphere on the basis of the received light, wherein the light transmitting unit includes a light intensity modulator2for performing intensity modulation on the light signal from the light source1with the modulating signal, and wherein the signal receiving means includes an optical frequency conversion means9for converting the frequency of the intensity-modulated component of the received light to a base-band frequency, and an optical detection means11for directly detecting an output signal from the optical frequency conversion means9to thereby convert into an electric signal to be subsequently inputted to the signal processing unit12.
REFERENCES:
patent: 6335701 (2002-01-01), Fujisaka et al.
patent: 2005/0162637 (2005-07-01), Kameyama et al.
patent: 42-8670 (1967-04-01), None
patent: 51-29032 (1976-08-01), None
patent: 59-150299 (1984-08-01), None
patent: 2-25786 (1990-01-01), None
patent: WO-03/100458 (2003-04-01), None
patent: WO-2004/061476 (2004-07-01), None
Hirano Yoshihito
Kameyama Shumpei
Mitsubishi Denki & Kabushiki Kaisha
Ratcliffe Luke D.
Tarcza Thomas H.
LandOfFree
Laser detection and ranging apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser detection and ranging apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser detection and ranging apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3794468