Graver W R, Gladden J W, Eastes J W
Appl Opt. 1980 May 1;19(9):1529-36. doi: 10.1364/AO.19.001529.
A novel recording process for the formation of phase volume holograms at up to 1500 cycles/mm is described. The term silver halide (sensitized) gelatin or SHG denotes an all-gelatin phase material, which records the initial image information through photon absorption by the silver halide. Our process uses a reversal bleach that dissolves the developed silver image and cross-links the gelatin molecules in the vicinity of the developed image. Experiments have determined the stored image as refractive-index differences within the remaining gelatin. The major attributes of SHG holograms are (1) panchromatic response, (2) 100:1 greater light sensitivity than dichromate (sensitized) gelatin, and (3) elimination of darkening (printout) effects.
描述了一种用于形成高达1500周期/毫米的相体积全息图的新型记录过程。卤化银（敏化）明胶或SHG一词表示一种全明胶相材料，它通过卤化银吸收光子来记录初始图像信息。我们的过程使用反转漂白剂来溶解显影后的银图像，并使显影图像附近的明胶分子交联。实验已确定存储的图像为剩余明胶内的折射率差异。SHG全息图的主要特性包括：（1）全色响应；（2）比重铬酸盐（敏化）明胶的光敏性高100倍；（3）消除了暗化（打印）效应。
