| 摘要 |
The invention provides a hologram plate which is used with the double-focus replication process, and which is integrated with a spacer to impart marring resistance thereto, and is integrated with a light absorbing layer to allow zero-order light and first-order light to have substantially the same intensity. This hologram plate 42 comprises an array of collective element holograms for diffracting parallel light incident thereon at a specific wavelength and a specific incident angle in such a way that the light is converged onto a specific focal length position. The hologram plate 42 is a multilayer structure made up of a first transparent substrate 31 , a hologram layer 32 , an adhesive layer 33 and a second transparent substrate 41 . The second transparent substrate 42 defines a surface in contact with a hologram photosensitive material 53 during hologram replication.
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