Magnification of the phase-shift for laser distance measurement

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-shi...

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Bibliographic Details
Main Authors: Perchet, G., Lescure, M., Bosch, T.
Format: Conference Proceeding
Language:English
Subjects:
Circuits
Distance measurement
Frequency conversion
Frequency measurement
Phase detection
Phase frequency detector
Phase measurement
Signal resolution
Voltage
Voltage-controlled oscillators
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Description
Summary: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.
ISSN:1091-5281
DOI:10.1109/IMTC.1997.604024