GB807244A - Light-polarising sheet material - Google Patents

Light-polarising sheet material

Info

Publication number
GB807244A
GB807244A GB27434/56A GB2743456A GB807244A GB 807244 A GB807244 A GB 807244A GB 27434/56 A GB27434/56 A GB 27434/56A GB 2743456 A GB2743456 A GB 2743456A GB 807244 A GB807244 A GB 807244A
Authority
GB
United Kingdom
Prior art keywords
stretching
light
sheet material
casting
subsequent
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
GB27434/56A
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.)
Polaroid Corp
Original Assignee
Polaroid Corp
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 Polaroid Corp filed Critical Polaroid Corp
Publication of GB807244A publication Critical patent/GB807244A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

Sheets of a copolymer of partially hydrolysed polyvinyl acetate and monomeric acrylonitrile, which have been oriented by stretching and dyed with a dichroic dye or stain, such as iodine, are employed as light polarizers. Dyeing may be effected prior to casting of the sheet, or subsequent to casting and prior to stretching, or subsequent to stretching. The dyed sheet may be subsequently stabilized by treatment with boric acid and borax. Specification 549,698, [Group IV], is referred to.
GB27434/56A 1955-09-09 1956-09-07 Light-polarising sheet material Expired GB807244A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US807244XA 1955-09-09 1955-09-09

Publications (1)

Publication Number Publication Date
GB807244A true GB807244A (en) 1959-01-14

Family

ID=22159203

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27434/56A Expired GB807244A (en) 1955-09-09 1956-09-07 Light-polarising sheet material

Country Status (1)

Country Link
GB (1) GB807244A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0249019A1 (en) * 1986-05-10 1987-12-16 Bayer Ag Polarizers based on polyacetylene and their fabrication

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0249019A1 (en) * 1986-05-10 1987-12-16 Bayer Ag Polarizers based on polyacetylene and their fabrication

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