Title :
Non-incremental interferometric distance meter
Author :
Minoni, U. ; Scotti, G. ; Docchio, F.
Author_Institution :
Brescia Univ., Italy
Abstract :
This paper presents an optical interferometer for non-incremental distance measurements based on a frequency-modulated laser diode. The presence of a suitable optical feedback enables to get measurements also beyond the coherence length of the laser. The system resolution is of 50 /spl mu/m over a range of 0.4 m at a working distance from 0.4 up to 1.5 m.
Keywords :
distance measurement; frequency modulation; laser feedback; light interferometry; measurement by laser beam; optical modulation; semiconductor lasers; 0.4 to 1.5 m; coherence length; frequency-modulated laser diode; interferometric distance meter; nonincremental distance measurements; optical feedback; working distance; Chirp modulation; Diode lasers; Frequency; Laser beams; Laser feedback; Optical control; Optical feedback; Optical interferometry; Optical polarization; Photodiodes;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1996 Conference on
Conference_Location :
Braunschweig, Germany
Print_ISBN :
0-7803-3376-4
DOI :
10.1109/CPEM.1996.546653
