Patent · US Active

Optical encoder with integrated monitor

US8068040B2 · kind B2 · utility

3Cited by

4References

18Claims

0Family size

Assignee

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

Inventors

Weng Fei Wong · Bukit Mertajam, MY
Chee Foo Lum · Bukit Mertajam, MY
Siow Ming Tan · Bukit Mertajam, MY

Key dates

Filing date	Feb 25, 2005
Grant date	Nov 29, 2011
Priority date	—
Expiry date	Jul 30, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG01D5/34715
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A sensor head for sensing light modulated by a moveable member, such as a code wheel or code strip, in an optical encoder. The sensor head has at least one monitor optical sensor and a primary optical sensor positioned to receive light modulated by a modulation track on the moveable member. The monitor optical sensor provides a monitor signal that is compared in a signal comparator to the output from the primary optical sensor to detect light at the primary sensor.

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