Dichromated gelatin films present sensitivity to red light without any special sensitization. This sensitivity is due to an absorption appearing in dichromated gelatin films and attributed mainly to a charge-transfer transition which results in an electron transfer from gelatin to chromium. To characterize holographically this recording material, both reflection and transmission gratings have been obtained using the 632.8-nm radiation from a He-Ne laser.
© 1985 Optical Society of America
Cristina Solano, Roger A. Lessard, and Pierre C. Roberge, "Red sensitivity of dichromated gelatin films," Appl. Opt. 24, 1189-1192 (1985)