Linearized Subfringe Interferometric Holography
This paper describes a number of methods for recording suboptical wavelength displacements or vibrations of a surface as a linear function of the irradiance of the image of the surface. The methods are an extension of conventional interferometric holography, including time averaged holography of sinusoidal vibration, double pulsed holography of sinusoidal vibrations or general displacements, time averaged holography of linear motion, and real time interferometric holography. The basic concept described here was first presented at the Second International Symposium on Acoustical Holography and published in the proceedings. The theory was later expanded and presented at the Annual Meeting of the Optical Society of America in October 1969. This paper presents the theoretical analysis of linearized subfringe interferometric holography and some experimental results. The theory is expanded to show how this can be used to record acoustical holograms.
KeywordsVibration Amplitude Holographic Interferometry Surface Vibration Object Beam Double Exposure
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