New laser interferometry methods of measuring the velocity of high-speed model missiles

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New laser interferometry methods of measuring the velocity of high-speed model missiles

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A modified Doppler technique is discussed, whereby a moving object is simultaneously illuminated by two intersecting laser beams which are coherent with one another. By comparing the different Doppler-shifted signals scattered, refracted, or diffracted from two overlapping light beams at the object, the velocity of high-speed missiles has been measured with good accuracy.

Inspec keywords: laser beam applications; velocity measurement; light interferometry; missiles

Subjects: Spatial variables control; Laser beam applications; Velocity, acceleration and rotation measurement; Optical interferometry; Spatial variables measurement; Other instrumentation and measurement systems; Optical interference in homogeneous media; Velocity, acceleration and rotation measurement; Laser applications; Optical propagation and transmission in inhomogeneous media; Bench and portable instruments

References

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      • L.M. Barker , R.E. Hollenbach . Interferometer technique for measuring the dynamic mechanical properties of materials. Rev. Sci. Instrum.
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      • H.D. vom Stein , H.J. Pfeifer . , Direkte Messung von Geschwindigkeitsänderungen über kurze Wegstrecken durch Ausnutzung des Dopplereffekts.
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      • H.D. vom Stein , H.J. Pfeifer , B. Koch . Geschwindigkeitsmessungen an kurzzeitigen Strömungsvorgangen mittels Laser-Strahlung. Optics Communications , 1
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      • L.M. Barker . (1967) Fine structure of compressive and release wave shapes in aluminium measured by the velocity interferometer technique, Symp. H.D.P. J.U.T.A.M..
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