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RapidDoubleExposure Holography of an Interblade Shock Wave in
Comparision of Localization Error Predictions with Holographic and Laser
2 other sections not shown
aberrations accurate localization AN(R anemometry appendix arbitrary assumption axial distance axial-flow compressor axis crosses shock blade passages Cartesian coordinates change in refractive components crosses shock wave curvature curved defined derivatives diffuse-illumination diffuser direction cosines double-exposure holography effect equations 11 film fluid fringe localization fringe position fringe visibility function given Hence hologram is recorded Holographic Interferometry imaging system interference fringes intersection laser anemometer measurements left edge Lewis Research Center light ray localization equations located mask measured localization error nanometers NASA National Aeronautics optical paraxial approximation phase contributed point of localization polynominal representation rapid-double-exposure holography reconstructed image reconstruction source reference frame reference plane refractive index region of interest scale transformation second exposure shock strength shock surface shown single-stage compressor Substituting equation tangency theory of fringe transformed coordinate system transonic compressor rotor unit vector varying Vg(R viewing aperture viewing axis crosses viewing direction viewing vector VrA0 wavelength