Optical scale, mold therefor, and optical encoder
AssigneeCanon Kabushiki Kaisha
InventorsManabu Takayama, Masahiko Igaki
Life of this patent
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Abstract
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.
Claims16
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 said fixed and movable platens.
An optical scale having a reflecting portion for reflecting light emitted from a light-emitting portion of a sensor having the light-emitting portion and a light-receiving portion and returning the light to the light-receiving portion,
- wherein a shaft holding portion of the optical scale which holds a shaft for rotating the optical scale and the reflecting portion are integrally molded by using a resin, and said shaft holding portion and said reflecting portion are formed on a single surface of the optical scale.
Dependencies are inferred from the claim text.