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3 January 1986 Low Cost Fiber Optic Velocimeter
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A noncontact, fiber-optic-based velocity measurement device which has not received much attention in the literature is what could be called a "Retical Image Velocimeter" or RIV. It provides the potential of velocity measurement accuracy comparable to more costly techniques. The chief advantage of the RIV method is that a coherent light source is not required. Instead, an inexpensive light-emitting diode is used in conjunction with fiber optic light guides and a reticle to produce a real fringe image at the point of measurement. Light scattered from particles or surface irregularities moving through this point is modulated by the reticle pattern. Collection, fiber optic transmission, detection, and frequency analysis of this scattered light at a remote location are used to infer the velocity of flow in a transparent media or the speed of a moving surface.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. A. Boiarski "Low Cost Fiber Optic Velocimeter", Proc. SPIE 0566, Fiber Optic and Laser Sensors III, (3 January 1986);


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