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Browse Journals & Magazines > Instrumentation and Measureme ...> Volume:40 Issue:6 Help

An electro-optical frequency doubling method to remove electrical noise in laser rangefinders

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3 Author(s)
Lescure, M. ; Lab. d''Electron., Nat. Polytech. Inst., Toulouse, France ; Bosch, T. ; Dziadowiec, Alexandre

The main limitation of phase-shift laser rangefinders is the disturbance created by the current source used to modulate the intensity of the light beam. This source, of frequency fo, generates an induced interference voltage which is vectorially added to the photoelectric signal measured. A method for modulating the light beam using the nonlinearity of an electro-optical crystal allows this disadvantage to be eliminated since the signal measured is a frequency multiple, nfo. Experimental results obtained under unfavorable shielding conditions show the efficiency of the proposed method

Published in:
Instrumentation and Measurement, IEEE Transactions on  (Volume:40 ,  Issue: 6 )

Date of Publication: Dec 1991

Page(s):
1046 - 1047
ISSN :
0018-9456
INSPEC Accession Number:
4133865
Digital Object Identifier :
10.1109/19.119792
Product Type:
Journals & Magazines
Date of Current Version :
06 August 2002
Issue Date :
Dec 1991
Sponsored by :
IEEE Instrumentation and Measurement Society

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