Patent · US Active

Two dimensional encoder system and method

US8829420B2 · kind B2 · utility

3Cited by

1References

20Claims

0Family size

Assignee

NIKON CORPORATION · JP

Inventors

Eric Peter Goodwin · Oro Valley, US
Daniel Gene Smith · Tucson, US

Key dates

Filing date	Jun 8, 2011
Grant date	Sep 9, 2014
Priority date	—
Expiry date	May 30, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG01D2205/90
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An encoder system and method are provided, that is designed to improve 2D encoder systems and methods in areas such as accuracy, compactness, stability, resolution, and/or light efficiency. Moreover, the system and method of this invention provides a new concept in a retroreflector that while particularly useful in applicants' system and method, is believed to have more general utility in optical imaging systems and methods.

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