Dynamic characteristics analysis of a reflection type photopolymer

Refractive-index changes in photopolymers are caused by exposure-related polymerization as well as by consequential diffusion of monomers. The authors perform experiments using the following procedures: The experiments are performed with equal input intensities of 1 mW for the two beams whose diameter is 1 cm. As a first step, the diffraction efficiency as a function of the exposure energy is measured. Also, the dependence of the incident angles is measured. One beam is fixed at 0/spl deg/ to the normal of the surface of the recording material and the angle of the other beam is changed. The diffraction efficiency curve as a function of the incident angle is determined.