23 September 1994 Laser doppler device for air pollution detection
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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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hiie Hindrikus, Hiie Hindrikus, Kalju Meigas, Kalju Meigas, "Laser doppler device for air pollution detection", Proc. SPIE 2271, Industrial Applications of Laser Radar, (23 September 1994); doi: 10.1117/12.188151; https://doi.org/10.1117/12.188151


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