US Patent No: 6,487,014

Number of patents in Portfolio can not be more than 2000

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

ALSO PUBLISHED AS: 20020012168

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Importance

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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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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NATIONAL RESEARCH COUNCIL OF CANADAOTTAWA ONTARIO916

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Li, Li Meridian, ID 917 4600

Cited Art Landscape

Patent Info (Count) # Cites Year
 
NATIONAL RESEARCH COUNCIL OF CANADA (4)
5,912,762 Thin film polarizing device 56 1996
5,982,541 High efficiency projection displays having thin film polarizing beam-splitters 56 1998
6,285,423 Polarizing back-lighting system for direct view liquid crystal displays 10 1999
6,317,264 Thin film polarizing device having metal-dielectric films 7 1999
 
ALCATEL CIT (1)
4,966,438 Dielectric layer polarizer 52 1989
 
CANON KABUSHIKI KAISHA (1)
5,648,870 Dichroic mirror and projector having the same 23 1994
 
CARESTREAM HEALTH, INC. (1)
5,466,564 Control of non-contact interference fringes in photographic films 6 1994
 
FUJITSU LIMITED (1)
4,650,289 Optical circulator 77 1980
 
Hughes Aircraft Company (1)
4,221,464 Hybrid Brewster's angle wire grid infrared polarizer 48 1978
 
LOCKHEED MARTIN CORPORATION (1)
4,733,926 Infrared polarizing beamsplitter 30 1986
 
NIPPON TELEGRAPH AND TELEPHONE CORPORATION (1)
4,272,159 Optical circulator 25 1979
 
Sano Kiko Co., Ltd. (1)
4,627,688 Beam splitter 26 1985

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
GENERAL PHOTONICS CORPORATION (3)
7,535,639 Optical depolarizers and DGD generators based on optical delay 9 2006
7,723,670 Optical differential group delay module with folded optical path 2 2008
8,164,831 Optical depolarizers and DGD generators based on optical delay 0 2009
 
DELTA ELECTRONICS, INC. (1)
8,493,657 Light source switching device adapted for a projection system 0 2008
 
MICROVISION, INC. (1)
8,622,549 Beam combiner for a scanned beam display 0 2011
 
OPLINK COMMUNICATIONS, INC. (1)
6,954,307 Four-port PM circulator 2 2002
 
REAL D (1)
8,540,372 Waveplate compensation in projection polarization conversion systems 0 2012

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11.5 Year Payment $7400.00 $3700.00 $1850.00 May 26, 2014
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