22 September 1983 Time-Lapse Holographic Technique In The Velocity Measurement Of A Uniformly Moving Object
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Departing from the conventional Doppler velocimetric method, we propose, in this paper, a simple yet effective holographic technique, based on the temporal filter concept, for the measurement of the velocity of a uniformly moving object. We note that such a technique can be implemented by the repetitive recording of two time-lapse Fourier Transform holograms of the moving object on the same plate in the successive time frames. The finished hologram can be reconstructed by either coherent or white light to reveal a set of high contrast Young's interference fringes located on the recording plane of the hologram. By measuring the spacing between fringes, we are able to determine the tranverse velocity of the moving object. This technique is complementary to the Doppler velocimetry in both the magnitude of the velocity and the direction of motion. In this paper, both theoretical analysis and experimental results will be presented.
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Ming-yi Chen, Ming-yi Chen, Hsuan Chen, Hsuan Chen, "Time-Lapse Holographic Technique In The Velocity Measurement Of A Uniformly Moving Object", Proc. SPIE 0416, Applications of Optical Metrology: Techniques and Measurements II, (22 September 1983); doi: 10.1117/12.935921; https://doi.org/10.1117/12.935921


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