Patent · US Active

Optical projection subsystem

US8070295B2 · kind B2 · utility

4Cited by

57References

23Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Patrick R. Destain · Plano, US
Jennifer L. Grace · Lakeside Park, US
John Duncan · Kendall, US
Tomasz A. Pol · Severna Park, US
William E. Phillips, III · Cincinnati, US
Michael W. O'Keefe · Cincinnati, US
Alexander Glinski · Cincinnati, US
Stephen J. Willett · Windom, US

Key dates

Filing date	Jan 13, 2011
Grant date	Dec 6, 2011
Priority date	—
Expiry date	Jan 13, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG02B13/001
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A projection subsystem includes a light engine that provides a collection lens, a collimator and at least one solid state light emitter. A projection lens assembly receives the image and provides a projection beam having a luminous flux level. The projection subsystem has a portability efficacy.

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