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Proceedings Paper

Laser doppler device for air pollution detection
Author(s): Hiie Hindrikus; Kalju Meigas
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Paper Abstract

A simple device for small particles detection is presented, consisting of a single-mode diode or gas laser with external cavity. The basis of the measurement is the selfmixing that occurs in the laser active medium when the radiation, scattered back by the moving particle into the laser resonator, interferes with the field inside it and causes changes of a pump current. Information about the number, velocity and size of particles can be derived by processing the current pulses. This compact device is capable of detecting a single microndiameter particle movement.

Paper Details

Date Published: 23 November 1994
PDF: 10 pages
Proc. SPIE 2249, Automated 3D and 2D Vision, (23 November 1994); doi: 10.1117/12.196101
Show Author Affiliations
Hiie Hindrikus, Tallinn Technical Univ. (Estonia)
Kalju Meigas, Tallinn Technical Univ. (Estonia)

Published in SPIE Proceedings Vol. 2249:
Automated 3D and 2D Vision
Rolf-Juergen Ahlers; Donald W. Braggins; Gary W. Kamerman, Editor(s)

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