FR2205245A5 - - Google Patents

Info

Publication number
FR2205245A5
FR2205245A5 FR7337835A FR7337835A FR2205245A5 FR 2205245 A5 FR2205245 A5 FR 2205245A5 FR 7337835 A FR7337835 A FR 7337835A FR 7337835 A FR7337835 A FR 7337835A FR 2205245 A5 FR2205245 A5 FR 2205245A5
Authority
FR
France
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.)
Expired
Application number
FR7337835A
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.)
Lucas Electrical Co Ltd
Original Assignee
Lucas Electrical Co Ltd
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 Lucas Electrical Co Ltd filed Critical Lucas Electrical Co Ltd
Application granted granted Critical
Publication of FR2205245A5 publication Critical patent/FR2205245A5/fr
Expired 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
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—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 planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0018—Redirecting means on the surface of the light guide
    • 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
    • G02B6/0011—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 planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • 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
    • G02B6/0011—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 planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/006—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to produce indicia, symbols, texts or the like
    • 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
    • G02B6/0011—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 planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0095—Light guides as housings, housing portions, shelves, doors, tiles, windows, or the like

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Details Of Measuring And Other Instruments (AREA)
FR7337835A 1972-10-28 1973-10-24 Expired FR2205245A5 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4981972A GB1438639A (en) 1972-10-28 1972-10-28 Indicator panels

Publications (1)

Publication Number Publication Date
FR2205245A5 true FR2205245A5 (fr) 1974-05-24

Family

ID=10453657

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7337835A Expired FR2205245A5 (fr) 1972-10-28 1973-10-24

Country Status (6)

Country Link
JP (1) JPS4977650A (fr)
DE (1) DE2353712A1 (fr)
FR (1) FR2205245A5 (fr)
GB (1) GB1438639A (fr)
IN (1) IN139638B (fr)
IT (1) IT996335B (fr)

Also Published As

Publication number Publication date
GB1438639A (en) 1976-06-09
DE2353712A1 (de) 1974-05-02
IT996335B (it) 1975-12-10
IN139638B (fr) 1976-07-10
AU6143873A (en) 1975-04-17
JPS4977650A (fr) 1974-07-26

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Legal Events

Date Code Title Description
ST Notification of lapse