Abstract
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.
Original language | Undefined |
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Pages (from-to) | 1281-1283 |
Journal | Journal of physics E: scientific instruments |
Volume | 20 |
Issue number | 10 |
DOIs | |
Publication status | Published - 1987 |
Keywords
- IR-59007