[go: up one dir, main page]

WO1991007674A1 - Filtre anti-aveuglant - Google Patents

Filtre anti-aveuglant Download PDF

Info

Publication number
WO1991007674A1
WO1991007674A1 PCT/GB1990/001771 GB9001771W WO9107674A1 WO 1991007674 A1 WO1991007674 A1 WO 1991007674A1 GB 9001771 W GB9001771 W GB 9001771W WO 9107674 A1 WO9107674 A1 WO 9107674A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
polariser
filter
dazzle
fog
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.)
Ceased
Application number
PCT/GB1990/001771
Other languages
English (en)
Inventor
Alan Mosley
Michael Charles Keogh Wiltshire
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.)
General Electric Company PLC
Original Assignee
General Electric Company PLC
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 General Electric Company PLC filed Critical General Electric Company PLC
Publication of WO1991007674A1 publication Critical patent/WO1991007674A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/281—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for attenuating light intensity, e.g. comprising rotatable polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/12—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
    • G02C2202/16—Laminated or compound lenses

Definitions

  • This Invention relates to a device for reducing dazzle caused by adverse weather conditions including bright sunlight, and in particular to spectacles or a visor for reducing such dazzle.
  • Glare which occurs 1n bright sunlight is due, in particular to the high content of blue light in the sunlight.
  • Glare which occurs in foggy or misty conditions is due to the fact that light from vehicle lamps 1s scattered by the water droplets in the mist or fog, and an appreciable amount is back-scattered Into the eyes of the driver or pilot. This effect is particularly troublesome at night, and leads to reduced vision and fatigue.
  • An object of the present Invention is to provide a cheap and effective device for reducing glare caused by such adverse weather conditions.
  • a device for reducing dazzle caused by adverse weather conditions comprising, in combination, a yellow filter and a vertical linear polariser.
  • Figure 1 is a schematic cross-sectional view of a light-reducing device in accordance with the invention
  • Figure 2 is a schematic diagram illustrating the operation of the device of Figure 1 for reducing dazzle caused by sunlight
  • FIG 3 is a schematic diagram illustrating the operation of the device of Figure 1 for reducing glare caused by fog or mist.
  • a light-reducing device 1 comprises a transparent substrate 2 supporting a vertical polariser 3 and a yellow filter 4.
  • Suitable materials for forming the polariser 3 and the filter 4 are, for example, materials designated LLY2-82-75 and LLY1-81-40, both available from Sanritzu of Japan. Alternative yellow filter and polariser materials may, of course, be used. If the polariser and filter combination is sufficiently rigid, the substrate 2 may be dispensed with.
  • the device 1 operates as follows to reduce glare from sunlight.
  • the light comprises red, yellow, green and blue light components, with a preponderance of blue light, especially on cloudless days.
  • the light is likely to be horizontally polarised by reflection from the generally horizontal surface. If the device 1 is positioned between the source 6 and the eyes 7, the light passes through the substrate 2 of the device and reaches the polariser 3.
  • the polariser has its absorption axis in the horizontal direction and so will transmit only that portion of the light which is vertically polarised. Horizontally-polarised vlsible light of all frequencies is stopped by the polariser 3.
  • the fi lter 4 Only l i ght in the yellow region of the spectrum passes through the fi lter, and light of higher frequency (shorter wavelength) i s not transmitted. Hence, only light of longer wavelength reaches the eyes 7 of the person.
  • the devi ce may be incorporated into sunglasses and may be especially useful for use by a driver i n bright sunlight conditions.
  • the device 1 operates as follows to reduce glare due to fog or mist.
  • a beam of light 8 is di rected forwards from a li ght source 9 below the eye level of the driver or pilot. If light from the beam 8 hits fog 10, a portion 11 of the li ght i s reflected into the eyes 12 of the dri ver. The amount of reflected light that reaches the eyes of the driver is reduced by the glare-reducing device 1.
  • the light beam 8 is made up of red, yellow, green and blue (RYGB) light components of different wavelengths, and these components react differently when they hit the individual water droplets 13 in the fog 10.
  • the back-scattered light is sti ll made up of white (RYGB) l ight, but si nce the headli ghts are bel ow the eye level of the driver or pilot the back-scattered light will be partially l i nearly polari sed in the horizontal di rection.
  • the light 11 therefore has a higher proportion of light with horizontal polari sation 14 than li ght with vertical polari sation 15.
  • the l ight passes through the substrate 2 of the device and reaches the polariser 3.
  • the polari ser will transmit only that portion of the light which 1s vertically polarised. Horizontally-polarised light of all frequencies 1s, as descri bed above, stopped by the polariser, and the yellow filter cuts out the light components of higher frequency. The latter is advantageous at night because the human eye 1s less sensitive to yellow light when subjected to low light levels. This effect is described by the photoplc and scotopic eye response curves.
  • the device 1 may be incorporated into a visor for spectacles or for a windscreen, which may be moved away when not in use. Alternatively, the device may be incorporated into spectacles. It may be provided as, or in combination with, the lenses themselves or may be provided separately for clipping on to an existing pair of spectacles.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Health & Medical Sciences (AREA)
  • Eyeglasses (AREA)
  • Polarising Elements (AREA)

Abstract

Un filtre anti-aveuglant (1) comprend un substrat transparent (2) sur lequel sont stratifiés un polarisant vertical (3) et un filtre jaune (4). Le dispositif peut être incorporé dans des lunettes de soleil ou dans un pare-soleil afin de réduire l'éblouissement provoqué par la lumière vive du soleil. Selon un autre mode de réalisation, on peut l'utiliser afin de réduire la lumière retrodiffusée par le brouillard ou par la brume.
PCT/GB1990/001771 1989-11-17 1990-11-16 Filtre anti-aveuglant Ceased WO1991007674A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8926055.8 1989-11-17
GB898926055A GB8926055D0 (en) 1989-11-17 1989-11-17 Anti-dazzle filter

Publications (1)

Publication Number Publication Date
WO1991007674A1 true WO1991007674A1 (fr) 1991-05-30

Family

ID=10666493

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/001771 Ceased WO1991007674A1 (fr) 1989-11-17 1990-11-16 Filtre anti-aveuglant

Country Status (3)

Country Link
AU (1) AU6729990A (fr)
GB (2) GB8926055D0 (fr)
WO (1) WO1991007674A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1094354A1 (fr) * 1999-10-21 2001-04-25 Sporoptic Pouilloux S.A. Verre composite de protection de la vue.
CN103827734A (zh) * 2011-10-03 2014-05-28 三菱瓦斯化学株式会社 偏振光眼镜镜片

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB483697A (en) * 1936-12-21 1938-04-25 Degea Ag Auergesellschaft Improvements in and relating to spectacles for the protection of the eyes against light
US3211047A (en) * 1959-03-03 1965-10-12 Heimberger Hermann Polarization type anti-dazzle device for motor vehicles
DE8530908U1 (de) * 1985-10-31 1987-08-27 C. Reichert Optische Werke Ag, Wien Polarisationsfilter mit einer Polarisationsfilterfolie
US4878748A (en) * 1987-02-26 1989-11-07 Suntiger, Inc. Ultraviolet radiation and blue light blocking polarizing lens

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB583842A (en) * 1941-01-21 1947-01-01 Polaroid Corp Improvements in or relating to combined light-filtering and light-polarizing means
DE3650185T2 (de) * 1986-10-16 1995-08-17 Suntiger Inc Polarisierungslinse, undurchlässig für ultraviolette strahlung und blaues licht.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB483697A (en) * 1936-12-21 1938-04-25 Degea Ag Auergesellschaft Improvements in and relating to spectacles for the protection of the eyes against light
US3211047A (en) * 1959-03-03 1965-10-12 Heimberger Hermann Polarization type anti-dazzle device for motor vehicles
DE8530908U1 (de) * 1985-10-31 1987-08-27 C. Reichert Optische Werke Ag, Wien Polarisationsfilter mit einer Polarisationsfilterfolie
US4878748A (en) * 1987-02-26 1989-11-07 Suntiger, Inc. Ultraviolet radiation and blue light blocking polarizing lens

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1094354A1 (fr) * 1999-10-21 2001-04-25 Sporoptic Pouilloux S.A. Verre composite de protection de la vue.
FR2800174A1 (fr) * 1999-10-21 2001-04-27 Sporoptic Pouilloux Sa Verre composite de protection de la vue
US6315411B1 (en) 1999-10-21 2001-11-13 Sporoptic Pouilloux Eyesight protective composite glass
CN103827734A (zh) * 2011-10-03 2014-05-28 三菱瓦斯化学株式会社 偏振光眼镜镜片
CN103827734B (zh) * 2011-10-03 2016-07-06 三菱瓦斯化学株式会社 偏振光眼镜镜片
US9606373B2 (en) 2011-10-03 2017-03-28 Mitsubishi Gas Chemical Company, Inc. Polarized mirrored glasses lens

Also Published As

Publication number Publication date
GB8926055D0 (en) 1990-01-10
AU6729990A (en) 1991-06-13
GB9024986D0 (en) 1991-01-02
GB2238882A (en) 1991-06-12

Similar Documents

Publication Publication Date Title
JP6138908B2 (ja) 自動車の運転者または同乗者用の適応型眼鏡
US4023029A (en) Distance indicating mirror device
EP2972566B1 (fr) Lentilles de lunettes à filtres commandés pour conduite de nuit
US6568738B1 (en) Optical glare limiter
US9688183B2 (en) Device for nighttime motor vehicle driving assistance
EP0498143A1 (fr) Dispositif anti-éblouissement actif pour conducteur de voiture automobile et autre véhicule
US4555434A (en) Anti-glare glass pane for a vehicle
US20030103261A1 (en) Techniques for reducing observed glare by using polarized optical transmission & reception devices
WO1991007674A1 (fr) Filtre anti-aveuglant
KR102329998B1 (ko) 차량용 선바이저
GB2060163A (en) Automatic control of vehicle lighting
US4846555A (en) System for improving visibility of objects within visual field
Richards Do yellow glasses impair night driving vision?
EP3561377A1 (fr) Feu avant d'automobile permettant d'améliorer la visibilité pendant la conduite
US20150329052A1 (en) Light filtering translucent film for vehicle mirror
CN203868875U (zh) 一种防眩光汽车车灯
WO1999024288A1 (fr) Systeme d'eclairage polarise anti-eblouissant pour vehicule automobile
US7306331B1 (en) Vision protection device for night driving
RU2012912C1 (ru) Очки автомобилиста
US2837006A (en) Angular discriminating optical viewing device
JPS61291215A (ja) 眩惑防止装置
CA2541218A1 (fr) Lampe de securite pour interieur de vehicule
US1829097A (en) Method of and means for determining headlight adjustments
CN2044035U (zh) 一种车辆行驶安全照明装置
CN2114176U (zh) 强光遮辐眼镜

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LU NL SE