CA2156435A1 - Prism Light Guide Luminaire with Efficient Directional Output - Google Patents

Prism Light Guide Luminaire with Efficient Directional Output

Info

Publication number
CA2156435A1
CA2156435A1 CA2156435A CA2156435A CA2156435A1 CA 2156435 A1 CA2156435 A1 CA 2156435A1 CA 2156435 A CA2156435 A CA 2156435A CA 2156435 A CA2156435 A CA 2156435A CA 2156435 A1 CA2156435 A1 CA 2156435A1
Authority
CA
Canada
Prior art keywords
light
scattering area
surface portion
luminaire
light emitting
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
CA2156435A
Other languages
French (fr)
Other versions
CA2156435C (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 Co
Original Assignee
Lorne A. Whitehead
Tir Systems Ltd.
Minnesota Mining And Manufacturing 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, Tir Systems Ltd., Minnesota Mining And Manufacturing Company filed Critical Lorne A. Whitehead
Publication of CA2156435A1 publication Critical patent/CA2156435A1/en
Application granted granted Critical
Publication of CA2156435C publication Critical patent/CA2156435C/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • 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
    • G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type
    • 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
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S385/00—Optical waveguides
    • Y10S385/901—Illuminating or display apparatus

Abstract

A prism light guide luminaire (84) has opaque (102) and light emitting (88) surface portions which together form a selected cross-sectional configuration.
The opaque surface portion has a light reflecting characteristic.
The light emitting surface portion is prism light guide material (100) which confines, within the luminaire, light rays which strike the material at angles falling within the material's acceptance angular range.
Within the luminaire, a light scattering area (92, 94) having a predefined shape and location redirects light into angles falling outside the material's acceptance angular range. The luminaire's cross-sectional configuration, the opaque surface portion's light reflecting characteristic, and the shape and location of the light scattering area are selected such that (i) light redirected by the light scattering area which does not pass directly from the scattering area to the light emitting surface portion and escape through that portion is substantially efficiently reflected by the prismatic material directly back onto the scattering area; and, (ii) all paths along which light may pass directly from the scattering area to the light emitting surface portion define a solid angle less than 2.pi..
CA002156435A 1993-02-23 1994-02-22 Prism light guide luminaire with efficient directional output Expired - Lifetime CA2156435C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/021,525 US5339382A (en) 1993-02-23 1993-02-23 Prism light guide luminaire with efficient directional output
US08/021,525 1993-02-23

Publications (2)

Publication Number Publication Date
CA2156435A1 true CA2156435A1 (en) 1994-09-01
CA2156435C CA2156435C (en) 1998-05-12

Family

ID=21804721

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002156435A Expired - Lifetime CA2156435C (en) 1993-02-23 1994-02-22 Prism light guide luminaire with efficient directional output

Country Status (7)

Country Link
US (1) US5339382A (en)
EP (1) EP0686247B1 (en)
JP (1) JP2675677B2 (en)
CA (1) CA2156435C (en)
DE (1) DE69407273T2 (en)
NO (1) NO953289L (en)
WO (1) WO1994019643A1 (en)

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Also Published As

Publication number Publication date
CA2156435C (en) 1998-05-12
JPH08512166A (en) 1996-12-17
EP0686247B1 (en) 1997-12-10
JP2675677B2 (en) 1997-11-12
DE69407273D1 (en) 1998-01-22
EP0686247A1 (en) 1995-12-13
NO953289L (en) 1995-10-20
WO1994019643A1 (en) 1994-09-01
NO953289D0 (en) 1995-08-22
US5339382A (en) 1994-08-16
DE69407273T2 (en) 1998-07-16

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