Mitsubishi Denki Kabushiki Kaisha

Katsutoshi Kamakura

Osamu Murakami

Koichi Sugimoto

Masaru Imaizumi

Masahiko Sakamoto

Yasushi Kawashima

Masahiro Otani

Isamu Higashioka

A code disk for a high-resolution encoder that can detect an absolute position and a method for manufacturing a mold to produce the code disk are provided. The code disk is formed by using transparent substrate. The code disk includes a plurality of tracks provided on the transparent substrate and an area provided between the plurality of tracks. Each surface of the plurality of tracks has a different pattern. A level of the area is different from that of the each surface of the plurality of tracks. The method for manufacturing the mold includes steps of processing a plurality of tracks with a flat surface on material; processing an area with a level different from that of each surface, between the plurality of tracks; forming different patterns on the each surface; plating the first material; and peeling plating from the first material to obtain a mold.

Code disk with a plurality of tracks having different patterns

Growing community of inventors

Tokyo, Japan

Katsutoshi Kamakura