| 초록 |
In our previous research, the effect of SeO2 inorganic crystal addition has been examined for green laser light (532nm) sensitive PVA/AA-based photopolymers. We prepared the photopolymer films which had DE(diffrection efficiency) values as high as 90%. But, these films didn't have good processibility, and had been shrank upon post exposure. To improve the optical properties and processibility of these photopolymer films, PVA molecular weights have been changed from 18,000 to 94,000, degrees of hydrolysis of PVA have been changed from 89% to 99%, and glycerol as a plasticizer have been added in this photopolymer films. Thus, we obtained the photopolymer films which had the clearer form and the lower shrinkage upon post exposure, while they kept the higher DE values. The real holographic images were photographed in this photopolymer films. |
