Patent · US Expired

Multiple resolution photodiode sensor array for an optical encoder

US6727493B2 · kind B2 · utility

7Cited by
4References
47Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 6, 2001
Grant dateApr 27, 2004
Priority date—
Expiry dateDec 21, 2021

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01D5/36
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A method of controlling the resolution of an optical encoder for providing position information of an object which moves along a certain measuring direction where the optical encoder includes a light source that emits light and a data track that moves relative to the light source. The method includes directing modulated light from the data track to a plurality of photodiodes of a detection system having a resolution that has a first value and changing the resolution of the detection system to a second value without altering an arrangement of the plurality of photodiodes of the detection system during the changing from the first value to the second value.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.