A modified Michelson interferometer is described by which three, by Ϫ/2, 0 and ϩ/2 phase-shifted interferograms can be taken simultaneously by a single CCD camera using a binary diffraction grating and polarization optics. Hence measurements of dynamic events and in adverse conditions are possible. The experimental setup, first results and a mathematical error analysis are presented.

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A single frame phase-shifting speckle-interferometer for quantitative measurements of out-of-plane-deformations is presented. Using a diffractive optical element, six phase-shifted interference patterns are generated and stored within the frame time ofa single CCD-camera.

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Speckle-interferometry is a sophisticated technique for the non-contact, high precision measurement of form, deformation and vibration of technical surfaces. In the following, a new single frame phase-shifting speckle- interferometer for the quantitative measurement of out-of-plane-deformations is described /1/. Six interference patterns are acquired within the frame time of a single CCD-camera, thus minimizing the influence of thermal fluctuations and vibrations of the object.