High isolation optical switch, isolator or circulator having thin film polarizing beam-splitters

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6487014
APP PUB NO 20020012168A1
SERIAL NO

09236102

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An optical device for controlling the flow of light between ports includes a pair of polarizing devices, which employ frustrated total internal reflection and interference in a thin film coating to reflect p-polarized light and to transmit s-polarized light. Polarization-rotating devices are used to rotate the polarization plane of the s- and p-polarized light beams so as to create optical switches, isolators and circulators using these polarizing devices.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NATIONAL RESEARCH COUNCIL OF CANADAOTTAWA ONTARIO495

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Li, Li Orleans, CA 851 7069

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ALCATEL CIT (1)
* 4966438 Dielectric layer polarizer 60 1989
 
Sano Kiko Co., Ltd. (1)
* 4627688 Beam splitter 26 1985
 
NATIONAL RESEARCH COUNCIL OF CANADA (4)
* 5912762 Thin film polarizing device 66 1996
* 5982541 High efficiency projection displays having thin film polarizing beam-splitters 70 1998
* 6285423 Polarizing back-lighting system for direct view liquid crystal displays 10 1999
* 6317264 Thin film polarizing device having metal-dielectric films 9 1999
 
CARESTREAM HEALTH, INC. (1)
* 5466564 Control of non-contact interference fringes in photographic films 6 1994
 
LOCKHEED MARTIN CORPORATION (1)
* 4733926 Infrared polarizing beamsplitter 34 1986
 
FUJITSU LIMITED (1)
* 4650289 Optical circulator 78 1980
 
CANON KABUSHIKI KAISHA (1)
* 5648870 Dichroic mirror and projector having the same 27 1994
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
OPLINK COMMUNICATIONS, LLC (1)
* 6954307 Four-port PM circulator 2 2002
 
MICROVISION, INC. (2)
* 8622549 Beam combiner for a scanned beam display 1 2011
* 2013/0003,021 Beam Combiner for Scanned Beam Display or the Like 1 2011
 
REALD INC. (2)
* 8540372 Waveplate compensation in projection polarization conversion systems 2 2012
* 2013/0100,414 Waveplate compensation in projection polarization conversion systems 0 2012
 
DELTA ELECTRONICS, INC. (2)
* 8493657 Light source switching device adapted for a projection system 0 2008
* 2009/0153,963 Light Source Switching Device Adapted for a Projection System 0 2008
 
GENERAL PHOTONICS CORPORATION (3)
* 7535639 Optical depolarizers and DGD generators based on optical delay 9 2006
7723670 Optical differential group delay module with folded optical path 2 2008
8164831 Optical depolarizers and DGD generators based on optical delay 0 2009
* Cited By Examiner