A compact differential laser Doppler velocimeter using a semiconductor laser
H W Jentink; J A J van Beurden; M A Helsdingen; F F M de Mul; H E Suichies; J G Aarnoudse; J Greve; H W Jentink; Dept. of Appl. Phys., Twente Univ., Enschede, Netherlands; J A J van Beurden; Dept. of Appl. Phys., Twente Univ., Enschede, Netherlands; M A Helsdingen; Dept. of Appl. Phys., Twente Univ., Enschede, Netherlands; F F M de Mul; Dept. of Appl. Phys., Twente Univ., Enschede, Netherlands; H E Suichies; Dept. of Appl. Phys., Twente Univ., Enschede, Netherlands; J G Aarnoudse; Dept. of Appl. Phys., Twente Univ., Enschede, Netherlands; J Greve; Dept. of Appl. Phys., Twente Univ., Enschede, Netherlands
Журнал:
Journal of Physics E: Scientific Instruments
Дата:
1987-10-01
Аннотация:
A small differential laser Doppler velocimeter which uses a semiconductor laser and a small number of optical components is described. In this device the light from the laser diode is split into coherent beams by means of a diffraction grating. The two first-order beams are crossed in a probe volume with a lens. In a test experiment the velocity of water containing 0.9 mu m polystyrene spheres was determined from the fluctuation of the scattered light. This velocity agreed with the velocity calculated from flux measurements.
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