Dai Nippon Printing Co., Ltd.

Tadatsugu Onuma

Nobuhiko Ichikawa

Hiroshi Kishimoto

Keiko Sekine

Masaki Katsumata

Yoichi Higuchi

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 platecomprises 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 plateis a multilayer structure made up of a first transparent substrate, a hologram layer, an adhesive layerand a second transparent substrate. The second transparent substratedefines a surface in contact with a hologram photosensitive materialduring hologram replication.

Hologram plate and its fabrication process

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 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 is a multilayer structure made up of a first transparent substrate a hologram layer an adhesive layer and a second transparent substrate The second transparent substrate defines a surface in contact with a hologram photosensitive material during hologram replication.

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Tokyo, Japan

Tadatsugu Onuma