Asahi Kogaku Kogyo Kabushiki Kaisha

Asahi Kogaku Kogyo Kaisha

Hiroshi Kuboya

Koichi Maruyama

Takayuki Sensui

Moriyasu Shirayanagi

Makoto Iki

Toshiharu Takahashi

Teruaki Hiyamuta

A diffusion plate includes a plurality of superimposed basic patterns, each having a large number of microstructures. The microstructures are located in two dimensional periodic arrangements, and lattice vectors, corresponding to the periodic arrangement of the microstructures, vary in accordance with the pattern. The invention also discloses a method for manufacturing a master die for such a diffusion plate, and a focusing screen using the diffusion plate.

Diffusion plate and method for manufacturing master die thereof

A diffusion plate includes a plurality of superimposed basic patterns, each having a large number of microstructures, wherein the microstructures are located in two dimensional periodic arrangements, and wherein lattice vectors, corresponding to the periodic arrangement of the microstructures, vary in accordance with the pattern. The invention also discloses a method for manufacturing a master die for such a diffusion plate, and a focusing screen using the diffusion plate.

Method for manufacturing a master die for a diffusion plate and

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Tokyo, Japan

Hiroshi Kuboya