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GB504557A - Improvements relating to optical polarizing apparatus - Google Patents

Improvements relating to optical polarizing apparatus

Info

Publication number
GB504557A
GB504557A GB28804/37A GB2880437A GB504557A GB 504557 A GB504557 A GB 504557A GB 28804/37 A GB28804/37 A GB 28804/37A GB 2880437 A GB2880437 A GB 2880437A GB 504557 A GB504557 A GB 504557A
Authority
GB
United Kingdom
Prior art keywords
sheet
polarized
polarizing
refringent
lamps
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
GB28804/37A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB28804/37A priority Critical patent/GB504557A/en
Publication of GB504557A publication Critical patent/GB504557A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
    • F21S41/135—Polarised
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

504,557. Optical polarizers. LAND, E. H. Oct. 21, 1937, No. 28804. Drawings to Specification. [Class 97 (i)] Polarizing-apparatus, particularly intended for use as an anti-glare device on vehicles or in stereoscopic projection and viewing apparatus, comprises a plane polarizing element in the form of a transparent sheet in which is embedded optically oriented particles, combined with a bi-refringent sheet producing a predetermined retardation between the components which it transmits. This retardation is preferably a quarter wave-length so that the bi-refringent sheet can be used to convert the plane-polarized beam produced by the polarizing sheet into a circularly-polarized beam. The two sheets may be joined together, for example by cement. For use as an antiglare device, the lamps of vehicles are provided 'with screens consisting of the compound sheets above described, so that they emit circularly-polarized beams and the driver is provided with a visor, for example on the windscreen, consisting of a similar compound sheet with the elements so arranged that the sheet is opaque to the light emitted by the lamps. For stereoscopic projection, each of the projectors for the two component pictures is provided with a circular polarizer as above, one beam being polarized clockwise and the other anticlockwise, and the observer is provided with a viewing device, also consisting of a pair of circular polarizers, each of which transmits the beam appropriate to the eye in front of which it is placed.
GB28804/37A 1937-10-21 1937-10-21 Improvements relating to optical polarizing apparatus Expired GB504557A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB28804/37A GB504557A (en) 1937-10-21 1937-10-21 Improvements relating to optical polarizing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB28804/37A GB504557A (en) 1937-10-21 1937-10-21 Improvements relating to optical polarizing apparatus

Publications (1)

Publication Number Publication Date
GB504557A true GB504557A (en) 1939-04-21

Family

ID=10281444

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28804/37A Expired GB504557A (en) 1937-10-21 1937-10-21 Improvements relating to optical polarizing apparatus

Country Status (1)

Country Link
GB (1) GB504557A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2017665A1 (en) * 2007-07-19 2009-01-21 University of Patras Eyeglasses with quarter-wave retardation plates for working with displays with a linearly polarized light emission
EP2172701A3 (en) * 2008-09-18 2010-04-28 Fujifilm Corporation Lighting tool and outdoor display device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2017665A1 (en) * 2007-07-19 2009-01-21 University of Patras Eyeglasses with quarter-wave retardation plates for working with displays with a linearly polarized light emission
EP2172701A3 (en) * 2008-09-18 2010-04-28 Fujifilm Corporation Lighting tool and outdoor display device

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