本文指出,利用几种染料能使重铬酸盐明胶的光谱灵敏度延伸到红光波段,用硫氮苯染料制造灵敏的薄膜。通过选择最佳的敏化参数,我们制出一种波长633nm、衍射效率80%、曝光能量200mJ/cm~2的记录介质。在这些介质记录的全息图上已观察到0.03调制指数。延伸的红光灵敏度高于没有用染料敏化的介质中的黄-绿光灵敏度。为了在540nm 波长处产生效果好的全息图,就需要大约300mJ/cm~2的曝光能量。本文提出一种制备对红光灵敏的重铬酸盐明胶全息记录介质的实用的方法 This paper indicates that the use of several dyes can extend the spectral sensitivity of dichromated gelatin to the red band and produce thin films with diazobenzene dyes. By selecting the optimum sensitizing parameter, we made a recording medium with a wavelength of 633 nm, a diffraction efficiency of 80% and an exposure energy of 200 mJ / cm ~ 2. 0.03 modulation index has been observed on the holograms recorded on these media. Extended red sensitivity is higher than yellow-green sensitivity in media that is not sensitized with dye. In order to produce a good hologram at a wavelength of 540 nm, an exposure energy of about 300 mJ / cm 2 is required. This paper presents a practical method for preparing red-sensitive dichromate gelatin holographic recording media