Image Contrast Arising From Specimen Motion In Holographic Imagery

Ernest Feleppa

doi:10.1117/12.953512

14 October 1971 Image Contrast Arising From Specimen Motion In Holographic Imagery

Ernest Feleppa

Proceedings Volume 0025, Developments in Holography II; (1971) https://doi.org/10.1117/12.953512
Event: Developments in Holography, 1971, Boston, United States

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.

Citation Download Citation

Ernest Feleppa "Image Contrast Arising From Specimen Motion In Holographic Imagery", Proc. SPIE 0025, Developments in Holography II, (14 October 1971); https://doi.org/10.1117/12.953512

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