JPS56125703A - 1/4 wavelength film - Google Patents

1/4 wavelength film

Info

Publication number
JPS56125703A
JPS56125703A JP2949580A JP2949580A JPS56125703A JP S56125703 A JPS56125703 A JP S56125703A JP 2949580 A JP2949580 A JP 2949580A JP 2949580 A JP2949580 A JP 2949580A JP S56125703 A JPS56125703 A JP S56125703A
Authority
JP
Japan
Prior art keywords
film
sheet
orientation
polarized light
adjust
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.)
Pending
Application number
JP2949580A
Other languages
Japanese (ja)
Inventor
Chiyotsugu Hitomi
Rinjiro Ichikawa
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.)
Toyobo Co Ltd
Original Assignee
Toyobo Co 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 Toyobo Co Ltd filed Critical Toyobo Co Ltd
Priority to JP2949580A priority Critical patent/JPS56125703A/en
Publication of JPS56125703A publication Critical patent/JPS56125703A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/08—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of polarising materials

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

PURPOSE:To obtain a 1/4 wavelength film with superior film formability, transparency, water resistance, heat resistance, etc. by orienting a styrene polymer film or sheet so as to adjust the retardation value measured with a polarization microscope to a specified range. CONSTITUTION:A homopolymer, a copolymer, a polymer blend, etc. of styrene and its deriv. are dissolved preferably in a solvent and formed into an about 10-500mu film or sheet by a casting method. This film or sheet is then subjected to uniaxial orientation by a free or fixed width, biaxial orientation or other orientation so as to adjust retardation value R represented by the equation and measured with a polarization microscope to 95-170nm. Thus, a 1/4 wavelength film capable of converting linearly polarized light and circularly polarized light is obtd. This film has enhanced clear cuttability, strength, etc.
JP2949580A 1980-03-07 1980-03-07 1/4 wavelength film Pending JPS56125703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2949580A JPS56125703A (en) 1980-03-07 1980-03-07 1/4 wavelength film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2949580A JPS56125703A (en) 1980-03-07 1980-03-07 1/4 wavelength film

Publications (1)

Publication Number Publication Date
JPS56125703A true JPS56125703A (en) 1981-10-02

Family

ID=12277645

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2949580A Pending JPS56125703A (en) 1980-03-07 1980-03-07 1/4 wavelength film

Country Status (1)

Country Link
JP (1) JPS56125703A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277804A2 (en) * 1987-02-02 1988-08-10 Sumitomo Chemical Company, Limited Polycarbonate films effective as optical phase retarders
US5867239A (en) * 1997-10-17 1999-02-02 Minnesota Mining And Manufacturing Company Wide angle optical retarder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277804A2 (en) * 1987-02-02 1988-08-10 Sumitomo Chemical Company, Limited Polycarbonate films effective as optical phase retarders
US5867239A (en) * 1997-10-17 1999-02-02 Minnesota Mining And Manufacturing Company Wide angle optical retarder
US6219121B1 (en) 1997-10-17 2001-04-17 3M Innovative Properties Company Wide angle optical retarder

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