Patent · US Expired

Projector having optical components immersed in liquid

US6533422B2 · kind B2 · utility

1Cited by

4References

29Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Peter J. Janssen · Scarborough, US
John Domm · Kitchener, CA

Key dates

Filing date	Aug 3, 2001
Grant date	Mar 18, 2003
Priority date	—
Expiry date	Sep 3, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG02B5/3083
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An optical projection system having optical components immersed in a liquid. An enclosure holds the liquid, a spherical lens, a polarizer, a polarizing beam splitter, a reflective light valve having a retarder foil, and an exit window. The liquid stabilizes the thermal environment, reduces the need for antireflective coatings, enables a reduction in the number of optical components, and enables high optical flux.

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