Latta J N
David Sarnoff Research Center of the RCA Laboratories, Princeton, NJ, USA.
Appl Opt. 1968 Dec 1;7(12):2409-16. doi: 10.1364/AO.7.002409.
The chemical bleaching of absorption holograms produces phase holograms that exhibit higher light efficiency than the holograms from which they were produced. The bleaching of thick absorption type hologram diffraction gratings produced at 6328 A is discussed. The bleached holograms were read out at both 6328 A and 9100 A. Ten bleaching materials were tried, of which two were judged acceptable: mercuric chloride and Kodak Chromium Intensifier. Mercuric chloride bleach produced efficiencies of 49% at 9100 A and 37% at 6328 A. The experimental results are compared with the maximum theoretical efficiencies by defining a grating efficiency, which is the ratio of the actual hologram efficiency to the intensity transmission of the hologram.
吸收全息图的化学漂白产生的相位全息图比产生它们的全息图具有更高的光效率。本文讨论了在6328埃产生的厚吸收型全息图衍射光栅的漂白。在6328埃和9100埃处对漂白后的全息图进行了读出。尝试了十种漂白材料，其中两种被判定为可接受：氯化汞和柯达铬增感剂。氯化汞漂白在9100埃处产生的效率为49%，在6328埃处为37%。通过定义光栅效率（即实际全息图效率与全息图强度透射率之比），将实验结果与最大理论效率进行了比较。
