1 February 1991 Diffuse radiation unsteady transformation by thermal dynamic holograms
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Abstract
The problem of the amplification of low intensity radiation pulses can be solved by the utilization of the optical amplifier based on the dynamic holograms (DH), as one of the methods. This permits to concentrate almost all the radiation from the illuminated object in the solid angle required for monitoring, thus, providing the decrease of the requirements to the sensitivity of the monitoring equipment, that is the photomaterials on the holographing of the diffuse reflecting objects, in particular. It is expedient to record the DH in the media with thermal nonlinearity, because in tnis case the effective transformation of the equal frequency beams on the small thicknesses ( less then 1 cm ) of the nonlinear medium under practicallj any crosz-section dimension :an be carried out, and the wide range of adjusting C 10+ i0s ) of the temporal scales of the Dii recording and reconstruction is possible just by c.angirg of the crossing angles between the incident beams.esides, under th certatr conditions the thermal DH can provide the image amplification with the increasing of their contrast.The investigation of the effectiie unsteady transformation of the plane waves has been carried out earlier, in this paper the results of the investigation of nstady mgification and phase abbezations (PA) of the difluse light beams durng their interaction in the thermal DH, re presented.
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Alexandra M. Berezinsky, Alexandra M. Berezinsky, Anatoliy Mikhailovi Dukhovniy, Anatoliy Mikhailovi Dukhovniy, } "Diffuse radiation unsteady transformation by thermal dynamic holograms", Proc. SPIE 1238, Three-Dimensional Holography: Science, Culture, Education, (1 February 1991); doi: 10.1117/12.19377; https://doi.org/10.1117/12.19377
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