记录在重铬酸盐明胶上的Lippmann全息图颜色控制的一种新途径

A New Way to Control the Color of Lippmann Holograms Recorded in Dichromated Gelatin

在制作明胶膜时加入聚乙烯醇及其它有机添加剂,重铬酸铵敏化后用 He-Cd 或 Ar^+激光器曝光,经常规的后处理制作得到 Lippmann 全息图。实验表明,只要改变聚乙烯醇及添加剂的加入量,就可以自由地控制全息图的再现波长向长波方向或短波方向漂移。聚乙烯醇及添加剂的加入对 Lippmann 全息图再现波长漂移的作用与产生漂移的机理,本文也给出了初步的讨论。

Polyvinyl alcobol and other additives are introduced into the aqueous gelatin while a film is coat- ed.A Lippmann hologram will be obtained when this film is sensitized by aqueous ammonium dichro- mate,exposed by He—Cd or Ar^+ laser and developed by the regular post processing method.The re- construction wavelength of the Lippmann hologram can be longer or shorter by increasing or decreasing the quantity of the polyvinyl alcohol and additives.Meanwhile,this paper presents an initial discussion on the functions and mecbanisms of controlling the reconstruction wavelength by using the polyvinyl alcohol and additives introduced into the gelatin.