Projection optical system

United States of America Patent

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Mar 13, 2007
Grant Date
Jan 6, 2005
app pub date
May 13, 2004
filing date
May 14, 2003

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Abstract

A reflective lighting optical system minimizes a back focusing distance and a depth of the system, and improves a lighting efficiency by disposing a wire grid type PBS (Polarized Beam Splitter) at an oblique angle with respect to a short side of an imager.

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Patent Owner(s)

LG ELECTRONICS INC.

International Classification(s)

G03B:APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS O....

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[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Kang, Ho Joong	Oeijungbu-si, KR	14	59

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Projection optical system

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United States of America Patent

10844451

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PATENT NO	7188955
APP PUB NO	20050001987A1
SERIAL NO	10844451
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
March 13, 2007	US,7188955,B2 US7188955B2	GRANTED PATENT AS SECOND PUBLICATION
January 06, 2005	US,20050001987,A1 US20050001987A1	FIRST PUBLISHED PATENT APPLICATION

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10844451

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