GB799365A - Improvements relating to light polarizers and process of making same - Google Patents

Improvements relating to light polarizers and process of making same

Info

Publication number
GB799365A
GB799365A GB7439/56A GB743956A GB799365A GB 799365 A GB799365 A GB 799365A GB 7439/56 A GB7439/56 A GB 7439/56A GB 743956 A GB743956 A GB 743956A GB 799365 A GB799365 A GB 799365A
Authority
GB
United Kingdom
Prior art keywords
polyvinyl
dyed
sheet
hydrolysed
march
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
GB7439/56A
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
International Polaroid Corp
Original Assignee
Polaroid Corp
International 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, International Polaroid Corp filed Critical Polaroid Corp
Publication of GB799365A publication Critical patent/GB799365A/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)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Abstract

799,365. Polarizing apparatus. INTERNATIONAL POLAROID CORPORATION. March 9, 1956 '[March 11, 1955], No. 7439/56. Drawings to Specification. Class 97(1) A light polarizer comprises a sheet of polymerized organic acid ester of vinyl alcohol of which at least a part of the surface is hydrolysed to polyvinyl alcohol which is molecularly oriented and dyed or stained with a dichloric substance. The sheet may be of polyvinyl trifluoroacetate, polyvinyl perfluorobutyrate or proprionate or polyvinyl trichloroacetate hydrolysed on the surface by gaseous ammonia, a gaseous amine or by alkaline solutions, and dyed with iodine, the sheet being molecularly oriented by stretching at some stage in the process. The dyed surface may be treated with boric acid. Specification 549,698 is referred to.
GB7439/56A 1955-03-11 1956-03-09 Improvements relating to light polarizers and process of making same Expired GB799365A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US799365XA 1955-03-11 1955-03-11

Publications (1)

Publication Number Publication Date
GB799365A true GB799365A (en) 1958-08-06

Family

ID=22153763

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7439/56A Expired GB799365A (en) 1955-03-11 1956-03-09 Improvements relating to light polarizers and process of making same

Country Status (1)

Country Link
GB (1) GB799365A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159850A2 (en) * 1984-04-07 1985-10-30 Saiteku Kabushiki Kaisha Process for making polarizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159850A2 (en) * 1984-04-07 1985-10-30 Saiteku Kabushiki Kaisha Process for making polarizer
EP0159850A3 (en) * 1984-04-07 1988-11-02 Saiteku Kabushiki Kaisha Process for making polarizer

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