GB838431A - Improvements in and relating to trans-illuminated panels - Google Patents

Improvements in and relating to trans-illuminated panels

Info

Publication number
GB838431A
GB838431A GB1871455A GB1871455A GB838431A GB 838431 A GB838431 A GB 838431A GB 1871455 A GB1871455 A GB 1871455A GB 1871455 A GB1871455 A GB 1871455A GB 838431 A GB838431 A GB 838431A
Authority
GB
United Kingdom
Prior art keywords
aperture
instrument
slit
reflecting surface
panel
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.)
Expired
Application number
GB1871455A
Inventor
Marian Aleksander Lancucki
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.)
Thorn Electrical Industries Ltd
Original Assignee
Thorn Electrical Industries 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 Thorn Electrical Industries Ltd filed Critical Thorn Electrical Industries Ltd
Priority to GB1871455A priority Critical patent/GB838431A/en
Publication of GB838431A publication Critical patent/GB838431A/en
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
    • G02B6/0033—Means for improving the coupling-out of light from 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
    • G02B6/0015—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
    • G02B6/002—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 by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—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 by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • G—PHYSICS
    • G12—INSTRUMENT DETAILS
    • G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G12B11/00—Indicating elements; Illumination thereof
    • G12B11/02—Scales; Dials
    • 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
    • G02B6/0031—Reflecting element, sheet or layer

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

838,431. Illuminated instrument panels. THORN ELECTRICAL INDUSTRIES Ltd. July 19, 1956 [June 28, 1955], No. 18714/55. Class 75(4) A trans - illuminated panel has an instrument aperture, an aperture to receive a light source and a reflecting surface arranged to direct light from the source into the instrument aperture which would otherwise be incident on the edge of the aperture at an angle greater than the critical angle of the material of the panel. The reflecting surface may be plain, spherical, elliptical or parabolic and may be formed by making a slit in the panel and polishing the wall of the slit adjacent the light source and instrument apertures; by applying metal foil to the wall of the slit; by coating it with a reflecting layer; or by forming a reflecting surface on a thin strip of methyl methacrylate polymer and inserting the strip in the slit. In one form, the panel comprises a sheet of transparent material 10 having a coating 11 of white plastic material covered by an opaque layer 12 of black plastic material. The back may have a light reflecting layer 13 except round the instrument aperture 14 which is of frusto-conical form. Apertures 16 are provided to receive the light sources 17 and two pairs of plane reflectors 18 are arranged symmetrically to the light sources and instrument aperture. Forms having parabolic or part-spherical reflecting surfaces adjacent the light sources or a single elliptical reflecting surface surrounding both sources and the instrument aperture are also described.
GB1871455A 1955-06-28 1955-06-28 Improvements in and relating to trans-illuminated panels Expired GB838431A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1871455A GB838431A (en) 1955-06-28 1955-06-28 Improvements in and relating to trans-illuminated panels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1871455A GB838431A (en) 1955-06-28 1955-06-28 Improvements in and relating to trans-illuminated panels

Publications (1)

Publication Number Publication Date
GB838431A true GB838431A (en) 1960-06-22

Family

ID=10117155

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1871455A Expired GB838431A (en) 1955-06-28 1955-06-28 Improvements in and relating to trans-illuminated panels

Country Status (1)

Country Link
GB (1) GB838431A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162375A (en) * 1962-01-17 1964-12-22 American Radiator & Standard Instrument illuminating means
US3278740A (en) * 1964-03-02 1966-10-11 California Plasteck Inc Illuminating apparatus
FR2429122A1 (en) * 1978-06-21 1980-01-18 Nissan Motor INDICATOR INSTRUMENT BLOCK WITH LIGHTING MOUNTING PANEL

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3162375A (en) * 1962-01-17 1964-12-22 American Radiator & Standard Instrument illuminating means
US3278740A (en) * 1964-03-02 1966-10-11 California Plasteck Inc Illuminating apparatus
FR2429122A1 (en) * 1978-06-21 1980-01-18 Nissan Motor INDICATOR INSTRUMENT BLOCK WITH LIGHTING MOUNTING PANEL

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