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Proceedings Paper

A simple dual-frequency noise laser rangefinder
Author(s): Daniel Onori; Josè Azaña
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Paper Abstract

We propose and characterize a novel and simple architecture of dual-frequency noise rangefinder aiming at achieving high precision and robustness with reduced hardware requirements. In the scheme, the range measurement is achieved by exploiting the differential beat-noise between two lasers. In more detail, the outputs of the two lasers are coupled together and sent to the target. The backscattered echo from the target is acquired by the echo-receiver. The two lasers’ outputs are also sent to the reference-receiver. The range measurement is achieved through the digital cross-correlation between the lasers’ beat-noise information acquired by the two receivers. A laboratory demonstration shows range accuracy and resolution of 3.6 mm and 0.8 m, respectively, well in accordance with the signal/noise-dependent theoretical boundary values.

Paper Details

Date Published: 12 November 2019
PDF: 5 pages
Proc. SPIE 11197, SPIE Future Sensing Technologies, 1119711 (12 November 2019); doi: 10.1117/12.2542801
Show Author Affiliations
Daniel Onori, Institut National de la Recherche Scientifique (Canada)
Josè Azaña, Institut National de la Recherche Scientifique (Canada)

Published in SPIE Proceedings Vol. 11197:
SPIE Future Sensing Technologies
Masafumi Kimata; Christopher R. Valenta, Editor(s)

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