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Magnification of the phase-shift for laser distance measurement

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3 Author(s)
Perchet, G. ; ENSEEIHT, Toulouse, France ; Lescure, M. ; Bosch, T.

The design of a phase-shift expander used for measuring distances in phase-shift rangefinder is presented. The system uses two coherent indirect frequency synthesisers with the photoelectric signal and the reference signal as input voltages. Theory demonstrates that a great improvement for phase-shift measurement resolution may be achieved. The main error sources are analysed: the influence of the output frequency modulation and the influence of the output frequency stability are evaluated. First experimentation results are presented

Published in:

Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE  (Volume:1 )

Date of Conference:

19-21 May 1997