The phenomenon of light concentration by a speckle screen based on a reference-free volume hologram

摘要

It is experimentally demonstrated that a speckle screen based on a reference-free volume hologram is capable of concentrating light in the visibility zone. Holographic speckle screens for the projection of images were formed in a bulk photosensitive material based on glycerol-containing dichromated gelatin (DCG). With such screens formed using radiation with a wavelength (0.442 nm) in the spectral range of DCG photosensitivity, it is possible to obtain high-quality image projections using both coherent radiation with a different wavelength and white light. The projection properties of speckle screens were studied, and their ability to concentrate light in the visibility zone was confirmed.