Patent ID: 7884984

Claim:
A method for replicating a volume reflection two-color master hologram comprising, in sequence as listed below: a) providing a photosensitive layer having a side and an opposing side; b) placing the side of the photosensitive layer in contact with or proximate to the master hologram; c) placing a first mask in contact with or proximate to the opposing side of the photosensitive layer masking at least one area of the photosensitive layer; d) exposing the photosensitive layer through the first mask with coherent actinic radiation of a first wavelength λ 1 resulting in a first wavelength exposed layer; e) removing the first mask; and f) exposing the first wavelength exposed layer with coherent actinic radiation of a second wavelength λ 2 resulting in a first and second wavelength exposed layer, wherein the first and second wavelength exposed layer is a replicate of the volume reflection two-color master hologram.