| 摘要 |
A layer of material having relatively low light sensitivity is interposed between a substrate and a light sensitive recording medium during recording of a slant fringe hologram. The layer frees the ends of the fringes from the substrate to permit greater expansion during a subsequent chemical swelling process, thereby resulting in a slant fringe hologram having improved efficiency. In one embodiment, a separate layer of light insensitive material is applied to the substrate prior to application of the recording medium. In another embodiment, a separate layer of light sensitive material is applied to the substrate and is then desensitized by exposure to incoherent light or by heat treatment prior to application of the recording medium.
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