Optical rotary encoder

  • US 6,255,644 B1
  • Filed: 04/13/1999
  • Issued: 07/03/2001
  • Est. Priority Date: 06/23/1997
  • Status: Expired due to Fees
First Claim
Patent Images

1. An optical rotary encoder for detecting a rotational amount or a rotational speed of a rotational shaft, comprising:

  • a light emitting section;

    a code plate having a body portion for converting light supplied from said light emitting section into a discrete movable beam group and an attachment portion for holding said body portion concentrically with the rotational shaft, said body portion and said attachment portion being formed integrally with each other by integrated plastic molding; and

    a light receiving section for receiving light contained in said discrete movable beam group.

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