PHOTOPOLYMERIZED MATERIAL FOR FABRICATING OF DIFFRACTION-GRATING REPLICAS

A photopolymerized material based on unsaturated polyester resin (poly -1,2-propylene glycol maleinate phthalate) and a method of processing it to obtain diffraction-grating replicas are proposed. Using a photop olymerized material makes it possible to reduce the fabrication time o f replicas from 15-20 h to 1-2 h because of the more than an order of magnitude increase in the polymerization rate of the unsaturated polye ster resin. It is shown that the optical and operational characteristi cs of such replicas are no different from the characteristics of repli cas obtained using the stated resin hardened by the action of an oxida tion-reduction system of polymerization initiation.