Patent · US Active

Encoder with a combined position and index track

US7619209B2 · kind B2 · utility

4Cited by

5References

7Claims

0Family size

Assignee

Avago Technologies ECBU IP (Singapore) Pte. Ltd. · SG

Inventors

Weng Fei Wong · Bukit Mertajam, MY
Chee Foo Lum · Bukit Mertajam, MY
Siang Leong Foo · Bukit Mertajam, MY

Key dates

Filing date	Jun 24, 2008
Grant date	Nov 17, 2009
Priority date	—
Expiry date	Jun 24, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG01D5/34792
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An optical encoder. The encoder includes a coding element, an emitter, and a detector. The coding element has a track with a track pattern. The track pattern includes a plurality of optically distinguishable sections, which include a plurality of position sections and an index section. The emitter generates a light signal incident on the track of the coding element. The detector includes a combined position and index photodetector array. The combined position and index photodetector array includes a plurality of position photodetectors and an index photodetector. Embodiments of this type of optical encoder implement position and index sections in a single track on the coding element.

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