Measurement of the diffraction efficiency of individual images in multiplexed holography

It is important in multiplex holography to measure the relative and absolute diffraction efficiencies of the individual images because of the phenomenon of holographic reciprocity law failure (HRLF). Existing techniques based on diffraction grating images cannot be used for realistic multiplex holog...

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Bibliographic Details
Published in:Optics and laser technology 1990-08, Vol.22 (4), p.263-265
Main Authors: Hobson, P.R., Sadler, D.A.
Format: Article
Language:English
Subjects:
(multiplex) holography
diffraction efficiency
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Holography
Optics
Physics
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Summary:It is important in multiplex holography to measure the relative and absolute diffraction efficiencies of the individual images because of the phenomenon of holographic reciprocity law failure (HRLF). Existing techniques based on diffraction grating images cannot be used for realistic multiplex holograms. This paper describes a simple and rapid technique, based on a charge-coupled device (CCD) camera and digital oscilloscope, that can be applied to all multiplex holograms where the images are spatially separated. Both absolute and relative diffraction efficiencies can be measured, and by using an image area comparison technique some insensitivity to focusing errors is obtained.
ISSN:0030-3992
1879-2545
DOI:10.1016/0030-3992(90)90058-C