Spectrally nonselective reflection holograms

Shermazan D. Kahkichashvily; Zurab V. Wardosanidze

doi:10.1117/12.19370

1 February 1991 Spectrally nonselective reflection holograms

Shermazan D. Kahkichashvily, Zurab V. Wardosanidze

Proceedings Volume 1238, Three-Dimensional Holography: Science, Culture, Education; (1991) https://doi.org/10.1117/12.19370
Event: International Seminar on 3D Holography, 1989, Kiev, Ukraine

Abstract

In the given work the procedure of receiving highly effecyive spectrally nonselective reflection holograms is described. The procedure is based on taking into consideration the dependence of the depth of recording medium. The curves of dependence of diffraction efficiency on the wavelength of reconstructed by selective and nonselective holograms on several wavelengths have also been received. The work1 for the first time showed the possibility of creating spectrally nonselective holographic mirrors and described the procedure of their production on the layers of dichromated gelatin (DG). In this case a substantially important condition of nonselectivity is a strong absorption of actinic radiation in the original emulsion layer by which the damped character of the summary field according to thickness in conditioned. In the process of developing the exposed layers there is a transformation of the structure with a constant spatial frequency into the structure having a definite gradient of this structure along the thickness. The value of the absorption coefficient of the original emulsion layer necessary for achieving the effect of nonselectivity was found experimentally ( 73 X 406 nm). 2 In the given work the same considerations were for receiving Denisyuk''s spectrally nonse. . . lective reflection holo- grams on DG. The summary field in the depth of strongly absorbing hologram layer in paraxial approximation has the form of: I( I0e I(x 2 I I(x I reference wave intensity r (x

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Shermazan D. Kahkichashvily and Zurab V. Wardosanidze "Spectrally nonselective reflection holograms", Proc. SPIE 1238, Three-Dimensional Holography: Science, Culture, Education, (1 February 1991); https://doi.org/10.1117/12.19370

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KEYWORDS

Holograms

Holography

Absorption

3D image reconstruction

Diffraction

3D image processing

Mirrors

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