全息记录材料的某些研究和进展

Some Researches of Holographic Materials and their Advancements

全息摄影用记录材料品种很多，因受性能影响，有的处于研究阶段或处于被淘汰境地。性能较好的重铬酸盐明胶存在影像易消褪弊病，将明胶换成有机聚合物从而改善克服了此缺陷。光致染料变色与有机聚合物全息材料利用螺吡喃，螺嗪染料吸收10．4～10．5μm长波红外线，产生热活性反应，随着染料的光致变色的热量传递使高分子有机聚合物产生折射率变化而形成全息影像的远红外线全息记录材料。

Among numerous materials developed for holography,some are still in the research stage, some are already eliminated due to their poor quality. Though bichromate-gelatine holographic materials perform fairly well,their image may fade rather easily;this imperfection may be overcomed by replacing the gelatine with organic polymerized compounds. Photochromic dyes, i. e. spyropyrans, spyroxazines dyes, combined with organic polymerized compounds, have created a new type of far-infrared holographic materials: these dyes can absorb 10.4～10. 5 μm wave length infrared rays, provoke thermoactive and photochromic reaction. The heat thus formed is transfered to the nearby organic polymers and modifies their refraction index,thus building a holographic image