CA2445433A1 - High efficiency reflector for directing collimated light into light guides - Google Patents

High efficiency reflector for directing collimated light into light guides Download PDF

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Publication number
CA2445433A1
CA2445433A1 CA002445433A CA2445433A CA2445433A1 CA 2445433 A1 CA2445433 A1 CA 2445433A1 CA 002445433 A CA002445433 A CA 002445433A CA 2445433 A CA2445433 A CA 2445433A CA 2445433 A1 CA2445433 A1 CA 2445433A1
Authority
CA
Canada
Prior art keywords
reflector
light
circumjacent
high efficiency
axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002445433A
Other languages
French (fr)
Other versions
CA2445433C (en
Inventor
Lorne A. Whitehead
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Innovative Properties Co
Original Assignee
Lorne A. Whitehead
3M Innovative Properties Company
Minnesota Mining And Manufacturing Company
3M Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lorne A. Whitehead, 3M Innovative Properties Company, Minnesota Mining And Manufacturing Company, 3M Company filed Critical Lorne A. Whitehead
Publication of CA2445433A1 publication Critical patent/CA2445433A1/en
Application granted granted Critical
Publication of CA2445433C publication Critical patent/CA2445433C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4298—Coupling light guides with opto-electronic elements coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/0006—Coupling light into the fibre

Abstract

A reflector for reflecting light from an elongate light source (10A) into the input end of a light guide (22A) having a diameter "D". The light source is inserted through the narrow end of a collimating reflector (16A) which has a wide end diameter exceeding "D", through which light is emitted into the guide. The wide end (34) of an output reflector (28) is circumjacent the collimating reflector's wide end. The output reflector's narrow end (36) is circumjacent the light guide's input end. The wide end (30) of an input reflector (26) is circumjacent the collimating reflector's narrow end. The reflectors are cylindrically symmetrical about axis (27). Light passing from the light source to the collimating reflector is reflected, producing an output beam whose width varies as a function of distance along the axis. The light guide's input end is positioned along the axis to minimize the output beam's width.
CA002445433A 2001-05-29 2001-10-11 High efficiency reflector for directing collimated light into light guides Expired - Lifetime CA2445433C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/865,430 US6418253B2 (en) 1999-03-08 2001-05-29 High efficiency reflector for directing collimated light into light guides
US09/865,430 2001-05-29
PCT/CA2001/001445 WO2002097323A1 (en) 2001-05-29 2001-10-11 High efficiency reflector for directing collimated light into light guides

Publications (2)

Publication Number Publication Date
CA2445433A1 true CA2445433A1 (en) 2002-12-05
CA2445433C CA2445433C (en) 2007-03-27

Family

ID=25345495

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002445433A Expired - Lifetime CA2445433C (en) 2001-05-29 2001-10-11 High efficiency reflector for directing collimated light into light guides

Country Status (5)

Country Link
US (2) US6418253B2 (en)
EP (1) EP1390663A1 (en)
JP (1) JP2004527014A (en)
CA (1) CA2445433C (en)
WO (1) WO2002097323A1 (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19932430C2 (en) * 1999-07-12 2002-03-14 Harting Elektrooptische Bauteile Gmbh & Co Kg Opto-electronic assembly and component for this assembly
US6809892B2 (en) * 2000-07-26 2004-10-26 3M Innovative Properties Company Hollow surface illuminator
US6840633B2 (en) * 2000-11-30 2005-01-11 Texas Instruments Incorporated Lamp reflector assembly
US7064740B2 (en) * 2001-11-09 2006-06-20 Sharp Laboratories Of America, Inc. Backlit display with improved dynamic range
AU2003236963A1 (en) * 2002-06-28 2004-01-19 Koninklijke Philips Electronics N.V. Luminaire and dynamic road-marking unit
US6783250B2 (en) * 2002-09-25 2004-08-31 Koninklijke Philips Electronics N.V. Efficient light collector for projection display system
JP4757201B2 (en) * 2003-12-18 2011-08-24 シャープ株式会社 Dynamic gamma for liquid crystal displays
US8395577B2 (en) 2004-05-04 2013-03-12 Sharp Laboratories Of America, Inc. Liquid crystal display with illumination control
US7872631B2 (en) 2004-05-04 2011-01-18 Sharp Laboratories Of America, Inc. Liquid crystal display with temporal black point
US7602369B2 (en) 2004-05-04 2009-10-13 Sharp Laboratories Of America, Inc. Liquid crystal display with colored backlight
US7777714B2 (en) 2004-05-04 2010-08-17 Sharp Laboratories Of America, Inc. Liquid crystal display with adaptive width
US7898519B2 (en) 2005-02-17 2011-03-01 Sharp Laboratories Of America, Inc. Method for overdriving a backlit display
US8050512B2 (en) 2004-11-16 2011-11-01 Sharp Laboratories Of America, Inc. High dynamic range images from low dynamic range images
US8050511B2 (en) 2004-11-16 2011-11-01 Sharp Laboratories Of America, Inc. High dynamic range images from low dynamic range images
US7438423B2 (en) 2005-08-29 2008-10-21 3M Innovative Properties Company Illumination system and projection system incorporating same
US8121401B2 (en) 2006-01-24 2012-02-21 Sharp Labortories of America, Inc. Method for reducing enhancement of artifacts and noise in image color enhancement
US9143657B2 (en) 2006-01-24 2015-09-22 Sharp Laboratories Of America, Inc. Color enhancement technique using skin color detection
US7592996B2 (en) * 2006-06-02 2009-09-22 Samsung Electronics Co., Ltd. Multiprimary color display with dynamic gamut mapping
US8941580B2 (en) 2006-11-30 2015-01-27 Sharp Laboratories Of America, Inc. Liquid crystal display with area adaptive backlight
JP2010140888A (en) * 2008-11-14 2010-06-24 Seiko Epson Corp Lighting device, and projector
US8632232B2 (en) * 2010-03-31 2014-01-21 Koito Manufacturing Co., Ltd. Vehicular headlamp having a columnar light guide
JP2011216278A (en) * 2010-03-31 2011-10-27 Koito Mfg Co Ltd Lamp fitting for vehicle

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2179161A (en) 1938-03-24 1939-11-07 Rambusch Decorating Company Illuminating device
US4241382A (en) 1979-03-23 1980-12-23 Maurice Daniel Fiber optics illuminator
US4615579A (en) 1983-08-29 1986-10-07 Canadian Patents & Development Ltd. Prism light guide luminaire
US4750798A (en) 1983-08-29 1988-06-14 Canadian Patents And Developement Limited Prism light guide luminaire
JPS6392909A (en) 1986-10-08 1988-04-23 Alps Electric Co Ltd Condenser
US4850665A (en) 1987-02-20 1989-07-25 Minnesota Mining And Manufacturing Company Method and apparatus for controlled emission of light from prism light guide
US4755918A (en) 1987-04-06 1988-07-05 Lumitex, Inc. Reflector system
US4787708A (en) 1987-05-08 1988-11-29 Tir Systems Ltd. Apparatus for continuously controlled emission of light from prism light guide
US4834495A (en) 1987-05-08 1989-05-30 Minnesota Mining And Manufacturing Company Collapsible light pipe
WO2000053972A1 (en) 1999-03-08 2000-09-14 Minnesota Mining And Manufacturing Company High efficiency reflector for directing collimated light into light guides

Also Published As

Publication number Publication date
US20010038736A1 (en) 2001-11-08
EP1390663A1 (en) 2004-02-25
US6418253B2 (en) 2002-07-09
WO2002097323A1 (en) 2002-12-05
JP2004527014A (en) 2004-09-02
US20020159692A1 (en) 2002-10-31
CA2445433C (en) 2007-03-27
US6522807B2 (en) 2003-02-18

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