Influence of Ultraviolet Irradiation on the Formation of Surface Holographic Structures Recorded in a Counter-directional Recording Scheme on Photoemulsion Layers

The possibility of using the Denisyuk counter-directional optical scheme for recording holographic relief-phase gratings on the silver halide photoemulsion PFG-01 is investigated. It is shown that the key operation leading to the formation of the surface relief of the grating in a wide range of spatial frequencies of 35 – 800 mm<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">−1</sup> is the irradiation of the photoemulsion with short-wave UV radiation with a wavelength less than 270 nm. It is found that the greatest values of the diffraction efficiency of the obtained holographic gratings in the region of the highest spatial frequencies of 550 – 800 mm<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">−1</sup> are achieved when using undiluted glacial acetic acid as an etchant for gelatin.