The Influence of Vacuum on increasing diffraction efficiency of holographic Silver Halide thin film grating

In this paper silver halide thin film layer is used for making holographic reflection grating. Construction of reflection gratings on silver halide thin film layer are difficult because of high spatial-frequency fringes associated with them. The main advantage of this processing technique is that recording with high-sensitivity can be performed with laser beam in the visible spectrum. Therefore in this paper an optimized processing technique for making reflection grating in the new silver halide materials is introduced and ّّّّfinally with drying in vacuum oven, diffraction efficiency of more than 50% is obtained for reflection gratings of 5120 lines/mm