An efficient method of resisting humidity for methylene-blue-sensitized dichromated gelatin (MBDCG) holograms is reported. The method uses a viscous liquid pure poly(styrene) solution with a low degree of polymerization as the coating material. On the basis of this coating, the diffraction efficiency of treated MBDCG holograms exposed to a high-humidity (relative humidity of 80–85%) environment was not obviously changed during observation over 3 mon.
© 1997 Optical Society of America
Wang Ketai, Guo Lurong, Zhu Jianhua, Zhang Weiping, Tang Jiyaueo, and Pang Lin, "Methylene-blue-sensitized dichromated gelatin holograms with antihumidity polymer coatings," Appl. Opt. 36, 3116-3119 (1997)