Patent · US Active

Optical reflective encoder with multi-faceted flat-faced lens

US9383229B2 · kind B2 · utility

6Cited by

12References

20Claims

0Family size

Assignee

Avego Technologies General IP (Singapore) Pte. Ltd. · SG

Inventors

Yee Loong Chin · Batu Gajah, MY
Wee Jin Yeap · Bukit Mertajam, MY

Key dates

Filing date	Oct 31, 2010
Grant date	Jul 5, 2016
Priority date	—
Expiry date	Feb 27, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49002
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Disclosed are various embodiments of high-speed, high-performance, low-noise, low-cost, compact, optical encoders having a multi-faceted flat-faced lens is disposed over the light emitters and light detectors thereof. Disclosed also are various means for preventing undesired stray light from reaching light detectors incorporated therein. Structures employed to block stray light in the optical encoders include light barriers, air gap trenches, and coatings disposed between first and second sides of a substrate of the encoder. Methods of making such optical encoders are also disclosed.

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