Title :
Magnification of the phase-shift for laser distance measurement
Author :
Perchet, G. ; Lescure, M. ; Bosch, T.
Author_Institution :
ENSEEIHT, Toulouse, France
Abstract :
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
Keywords :
frequency synthesizers; laser frequency stability; laser ranging; measurement errors; optical modulation; phase shifters; coherent indirect frequency synthesisers; error sources; laser distance measurement; measurement resolution; output frequency modulation; output frequency stability; phase-shift expander; phase-shift rangefinder; photoelectric signal; reference signal; Circuits; Distance measurement; Frequency conversion; Frequency measurement; Phase detection; Phase frequency detector; Phase measurement; Signal resolution; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-3747-6
DOI :
10.1109/IMTC.1997.604024
