Absolute distance measurement system using a coherent optical sensor

Author

Norgia, Michele ; Magnani, Alessandro ; Pesatori, Alessandro

Author_Institution

Dipt. di Elettron. e Inf., Politec. di Milano, Milan, Italy

fYear

2012

fDate

13-16 May 2012

Firstpage

1362

Lastpage

1365

Abstract

This work describes the development of a new optical technique for absolute distance measurements, functioning in safety class 1. By current injection, a wavelength modulation takes place in the laser diode: using a particular algorithm to extract the frequency tone of the fringes induced by the self-mixing effect, it is possible to measure the absolute distance of a target, with a compact and low-cost device. By means of particular shaped pulses, the system can work in safety class 1.

Keywords

distance measurement; optical sensors; optical variables measurement; semiconductor lasers; absolute distance measurement system; coherent optical sensor; laser diode; low-cost device; particular algorithm; self-mixing effect; shaped pulses; wavelength modulation; Current measurement; Frequency measurement; Measurement by laser beam; Modulation; Optical feedback; Optical interferometry; Optical variables measurement; Distance meausurements; Frequency measurement; Optical interferometry; Optoelectronic devices; Position measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC), 2012 IEEE International

Conference_Location

Graz

ISSN

1091-5281

Print_ISBN

978-1-4577-1773-4

Type

conf

DOI

10.1109/I2MTC.2012.6229161

Filename

6229161