Patent ID: 6344297
Filing Date: 2002-02-05
Classification: G03F

Abstract:
A method of fabricating a holographic recording medium comprising the steps of:preparing an inner layer of at least two distinctive polymerizable acrylic materials and a dye selected from the group consisting of: wherein R1, R2, R3, R4, R5, R6, R7, R8 is a H, R9, or X; R9 is an alkyl group having 1 to 8 carbon atoms, or an aryl group having 4 to 20 carbon atoms, and X is a halogen; wherein R1, R2, R3, R4, R5, R6, R7, R8, is a H, R9, or X; R9 is an alkyl group having 1 to 8 carbon atoms, or an aryl group having 4 to 20 carbon atoms, and X is a halogen; and combinations thereof; positioning the inner layer, which is at least partially polymerized, between two planar plates, each plate is separated from the other plate so there is a cavity between each plate and the inner layer; inserting a third polymerizable acrylic material into the cavity; heating the inner layer and the third polymerizable acrylic material to form a holographic recording medium having a concentration distribution of the dye.