US 4,856,857 · Granted 1989-08-15
Transparent reflection-type
A transparent-type hologram comprising a transparent hologram-forming layer and a holographic effect-enhancing layer comprising a thin transparent film, the holographic effect-enhancing layer being laminated on the hologram-forming portion of the transparent hologram-forming layer. The holographic effect-enhancing layer has a refractive index different from that of the transparent hologram-forming layer.
Patent details
- Publication number
- US 4,856,857
- Filing date
- 1988-09-26
- Grant date
- 1989-08-15
- Assignee
- Dai Nippon Insatsu Kabushiki Kaisha
- Inventor(s)
- TAKEUCHI; SATOSHI, DANJO; KOUTARO, TAHARA; SHIGEHIKO, YUI; YOSHIHARU, IKEDA; SATOSHI
- CPC class
- G03H3/00
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