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Proceedings Paper

VCSEL array for compact time-of-flight sensor
Author(s): Michael Linde Jakobsen; S. Osten; Steven Richard Kitchen; Carsten Dam-Hansen; Steen Gruner Hanson
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Paper Abstract

A novel and low-cost time-of-flight system is presented. The system, which is based on a vertical cavity surface emitting laser (VCSEL) array as the light source, images the near field of all the VCSEL beams into the measurement volume. Each VCSEL provides a light sheet or a light spot in the measurement volume, and thus adds to the total optical power present in the measurement volume. The multiple-beam time-of-flight system provides operation at a lower signal-to-noise ratio and determinant of target-motion direction with a single photodetector. The concept provides a simple and compact sensor for surface velocity and fluid flow measurments, where the calibration of the system is almost temperature independent. This paper will demonstrate the concept and quantify the system tolerance with respect to temperature changes.

Paper Details

Date Published: 15 December 2003
PDF: 8 pages
Proc. SPIE 5260, Applications of Photonic Technology 6, (15 December 2003); doi: 10.1117/12.543334
Show Author Affiliations
Michael Linde Jakobsen, Risoe National Lab. (Denmark)
S. Osten, Hochschule Bremen Univ. of Applied Sciences (Germany)
Steven Richard Kitchen, Kamstrup A/S (Denmark)
Carsten Dam-Hansen, Kamstrup A/S (Denmark)
Steen Gruner Hanson, Risoe National Lab. (Denmark)


Published in SPIE Proceedings Vol. 5260:
Applications of Photonic Technology 6
Roger A. Lessard; George A. Lampropoulos, Editor(s)

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