Title :
Metrological characterization of a novel absolute distance meter based on dispersive comb-spectrum interferometry
Author :
Minoni, U. ; Rovati, L. ; Bonardi, M. ; Docchio, F.
Author_Institution :
Dipt. di Electtronica per l´´Autom., Brescia Univ., Italy
Abstract :
The paper reports results of an investigation on the main measurement uncertainty sources in a novel distance meter based on dispersive comb-spectrum interferometry. The light source is a commercial laser diode operating at 670 nm driven ender the threshold condition, and emitting a beam with a comb-shaped spectrum. Sensitivity of the measurement to the operating conditions has been evaluated. Results from an experimental activity aimed at characterizing the laser and to measure the performance of a prototype implementation are also presented. The system is suitable to perform unambiguous non-incremental distance measurements over a range of 0.8 mm with a total uncertainty of about 1.5 μm
Keywords :
distance measurement; light interferometry; measurement by laser beam; 670 nm; absolute distance meter; comb-shaped spectrum; dispersive comb-spectrum interferometry; distance meter; laser diode; light source; measurement uncertainty sources; non-incremental distance measurement; uncertainty; Diode lasers; Dispersion; Distance measurement; Laser beams; Light sources; Measurement uncertainty; Optical beam splitting; Optical interferometry; Performance evaluation; Threshold current;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1998. IMTC/98. Conference Proceedings. IEEE
Conference_Location :
St. Paul, MN
Print_ISBN :
0-7803-4797-8
DOI :
10.1109/IMTC.1998.676901
