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Proceedings Paper

Image Contrast Arising From Specimen Motion In Holographic Imagery
Author(s): Ernest Feleppa
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Paper Abstract

The sensitivity of holographic techniques to motion in the recording system is often considered to be a disadvantage of holography. Motion in the apparatus, or in the object being recorded, causes phase changes at the recording plane during the period of exposure.1,2 These phase changes cause a reduction in the contrast of the recorded fringes and thus, in turn, a reduction in image brightness. Ordinarily, holographers take great pains to minimize motion in the system so that motion does not darken or eliminate the desired holographic image. However, this sensitivity to motion becomes an advantage in studying certain kinds of motion, for example motion within biological specimens.3 If the motion is not spatially uniform within the specimen, the effect of motion on image brightness is equivalently nonuniform. Thus the hologram provides a permanent record of the motion in a living, changing specimen. The specimen, which may be continually changing, is recorded as it exists during a finite interval on time.

Paper Details

Date Published: 14 October 1971
PDF: 6 pages
Proc. SPIE 0025, Developments in Holography II, (14 October 1971); doi: 10.1117/12.953512
Show Author Affiliations
Ernest Feleppa, Riverside Research Institute (United States)

Published in SPIE Proceedings Vol. 0025:
Developments in Holography II
Brian J. Thompson; John B. DeVelis, Editor(s)

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