| Popis: |
The results of researches of pulse fourier holograms recording on the self-developing photopolymer PPC-488 with a photosensitivity in a range (lambda) equals 400 - 500 nm are presented. It is shown, that due to non-stationary energy transfer between recording and scattering beams and, accordingly, the noise holograms amplification essential decreasing of the signal to noise ratio (SNR) has place at relatively high efficiency of Fourier holograms (more than 50%). It has been found, that recording of the noise holograms can be appreciably suppressed by increasing of intensity of reference beam concerning to intensity of object beam. On this way it was possible to improve the SNR for the Fourier holograms of binary phase masks: at a reference to object beams ratio R equals 26 the phase Fourier holograms with efficiency 15% and SNR 20 dB has been recorded. |
