Electronic heterodyne recording of interference patternsAn 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.
Document ID
19800060147
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Merat, F. L. (Case Western Reserve Univ. Cleveland, OH, United States)
Claspy, P. C. (Case Western Reserve University Cleveland, Ohio, United States)