Patent ID: 8450028

Claim:
A method of recording a volume holographic pattern, shape or image, comprising: exposing a holographic recording medium comprising a photoreactive dye to a plurality of interfering coherent light sources emitting light at a wavelength to which the photoreactive dye is sensitive to form interference fringes therein without a shape, pattern, or image, the interference fringes formed by photoreacted areas of the photoreactive dye and unreacted areas of the photoreactive dye; and partially or fully bleaching, removing, or deactivating the photoreactive dye fringes in selected areas of the holographic recording medium by exposing the selected areas of the holographic recording medium to actinic radiation, thereby producing the holographic pattern, shape or image formed by portions of the holographic recording medium where fringes were not bleached, removed, or deactivated and portions of the holographic recording medium where fringes were bleached, removed, or deactivated.