Optical scale, mold therefor, and optical encoder

摘要

It is an object of this invention to provide a mold for manufacturing an optical scale which can be easily manufactured and is capable of outputting high-precision position signals. In order to achieve this object, there is provided a mold for an optical scale, which has fixed and movable platens and is used to mold an optical scale, wherein both a first mold portion for forming a shaft mount hole for the optical scale and a second mold portion for forming a slit portion of the optical scale are arranged in one of the fixed and movable platens.