Electronic heterodyne recording of interference patterns

Details Electronic heterodyne recording of interference patterns Electronic heterodyne recording of interference patterns

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979spie..192..159m&link_type=abstract

In: Interferometry; Proceedings of the Seminar, San Diego, Calif., August 29, 30, 1979. (A80-44308 19-35) Bellingham, Wash., Soc

Physics

Diffraction Patterns, Electronic Control, Heterodyning, Holographic Interferometry, Photographic Recording, Data Recording, Electro-Optical Effect, Image Dissector Tubes, Light Modulation, Phase Shift, Video Data

Scientific paper

An electronic heterodyne technique is being investigated for video (i.e., television rate and format) recording of interference patterns. In the heterodyne technique electro-optic modulation is used to introduce a sinusoidal phase shift between the beams of an interferometer. For phase modulation frequencies between 0.1 and 15 MHz an image dissector camera may be used to scan the resulting temporally modulated interference pattern. Heterodyne detection of the camera output is used to selectively record the interference pattern. An advantage of such synchronous recording is that it permits recording of low-contrast fringes in high ambient light conditions. The application of this technique to the recording of holograms is discussed.

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