Process for preparing blazed holograms

DETAILED DESCRIPTION According to the present invention, a process for preparing blazed holograms is provided which comprises fabricating a glass or metal plate having a surface of serrated cross section corresponding to the desired blazed grating pattern, disposing the glass or metal plate in an injection mold to allow the surface of serrated cross section to constitute an inner surface of the mold, injecting a molten acrylic resin into the mold under a molding pressure of 1500 kgf/cm.
sup.
2 or more and removing the molded acrylic resin from the glass or metal plate to obtain an acrylic blazed hologram.
The present invention has characteristics of utilizing as a molding stamper a glass or metal plate having a blazed pattern and employing the plate for a specific injection molding to prepare an acrylic resin blazed hologram.
According to the process of the present invention, by using the single glass or metal plate with a simple injection molding process, a blazed hologram of acrylic resin can be effectively mass-produced having an excellent reproducibility, so that steps for forming blazed holograms can be simplified and manufacturing cost is reduced.
Also, in the event that a metal plate having a blazed grating pattern is employed, since it has higher mechanical durability than the glass plate, it can be used as a molding stamper for a longer time, and a further reduction of manufacturing cost can be realized.