<title>Some problems of the registration of colored holograms with pulsed lasers</title>

Abstract

In the article are studied the peculiarities of the registration of the colored holograms with the radiation of the pulsed laser, caused by the dimensions of the monocrystals of the silver haloide in the holographical layer and by the simultaneous registration on two wavelengths. Parameters of the materials for the colored registration and possibility of the object color reconstruction via two wavelengths (red and green) registration are evaluated.1. Investigation of the influence of the dimensions of the stals of the silver haloide onto the holographical parameters of the photolayer under the exposure by nano-and microsecond pulses.One of the problems of the registration of the reflective holograms with the help of the radiation with the nanosecond pulse duration is the aggravation of the holographical parameters of the silver haloide materials, which provide high resolution: the diffraction efficiency is diminished up to 20 times in comparison with the continuous or microsecond radiation. It may be caused by the small dimensions of the monocrystals of the silver haloide in these layers. In this work we were studying the influence of these monocrystals dimensions onto the diffraction efficiency of the reflective holograms, registered under the exposure of the ruby laser with the pulse durations 30 ns and 300 ts. We were studying the photolayers with the dimensions of the monocrystals in the layer from 20 to 50 nm; with the one (single fraction) or two (two fraction) dominating dimensions. It was find out that in the case of microsecond exposure the diffraction efficiency grows with the monocrystals diminishing, while in the case of the nanosecond exposure there is the optimal dimension, depending of the silver concentration in the layer and of the photo -chemical processing conditions (see fig.l). Diffraction efficiency in the case of two fraction layer is higher than in the case of single fraction (table 1). Table 1. Diffraction efficiency of the single and two fraction layers.

Some Possibilities for the Enhancement of Light Sensitivity of Silver Halide Photographic Materials for Holographic Recording by Counter Propagating Continuous- and Pulsed-Radiation Beams

“…In the case of recording with nanosecond pulse radiation in such layers [1,2], a substantial decrease (by a factor of up to 20) in the diffraction efficiency and light sensitivity is observed. The effect of lowering the speed of silver halide photosensitive materials at short high-intensity exposures (reciprocity failure) is known and it has been described in some works [3][4][5][6].…”

“…1 E-mail: rose_ryabova@mail.ru (2) The efficiency of holographic recording by radiation with a pulse duration of the order of 10 -8 s increases with an increase in the silver halide grain size.…”