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Multiproduction of Holograms

IP.com Disclosure Number: IPCOM000091774D
Original Publication Date: 1968-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Bryngdahl, O: AUTHOR [+2]

Abstract

A hologram can be simultaneously recorded on a plurality of photographic plates by stacking the photographic plates close to each other in the recording plane of the apparatus which generates the hologram. Superior results are obtained by using photographic plates which have a low density and which do not produce any significant amount of scattering. The apparatus, used to record the holograms, consists of a laser light source, a beam splitter for dividing the light into two beams, and a mirror for directing one of the beams so that it intersects the second beam. The stack of photographic plates is positioned where the beams intersect. The plates are shown as somewhat separated. However, similar results are obtained by placing the plates as close together as possible.

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Multiproduction of Holograms

A hologram can be simultaneously recorded on a plurality of photographic plates by stacking the photographic plates close to each other in the recording plane of the apparatus which generates the hologram. Superior results are obtained by using photographic plates which have a low density and which do not produce any significant amount of scattering. The apparatus, used to record the holograms, consists of a laser light source, a beam splitter for dividing the light into two beams, and a mirror for directing one of the beams so that it intersects the second beam. The stack of photographic plates is positioned where the beams intersect. The plates are shown as somewhat separated. However, similar results are obtained by placing the plates as close together as possible. The location of the image produced during reconstruction is a function of the spacing of the plates. Recordings can be obtained which have the same working point on the amplitude transmittance versus exposure curve by pre- exposing the plates differently. It is also possible to bleach the plates to obtain any desired density. In order to obtain comparable reconstructions from the different plates, the latter can be developed in solutions with different concentrations. In this way, modulation of the holograms on each of the plates is comparable. It is desirable, but not necessary, to use a red light source. Better results are achieved with longer wavelength light sources....