Abstract

Heterodyne holographic interferometry provides automated interference phase measurement with high resolution and allows the quantitative evaluation of 3-D displacement and strain on solid objects. The fundamentals of heterodyning in double-exposure holography are reviewed and its possibilities and limitations are discussed in detail. Experimental results of strain measurement on a curved object surface are reported. Three double-exposure hologram recordings with different illuminations are used to get the vector displacement. Based on locally calculated derivatives of the displacement field, a sensitivity for the strain components of 1 μm/m with a spatial resolution of a few millimeters has been achieved. The features of heterodyne holographic interferometry are compared with those of quasiheterodyne (phase stepping) fringe interpolation.

© 1987 Optical Society of America

Statistical properties of interference phase detection in speckle fields applied to holographic interferometry

Ruedi Thalmann and René Dändliker
J. Opt. Soc. Am. A 3(7) 972-981 (1986)

Holographic interferometry with reference beams modulated by the object motion

Horst Kreitlow, Thomas Kreis, and Werner Jüptner
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Dual-reference holographic interferometry with a double pulsed laser

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Measurement error caused by speckle noise in heterodyne and quasi-heterodyne holographic interferometry

Qiang Fang
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