JPS56125703A - 1/4 wavelength film - Google Patents
1/4 wavelength filmInfo
- 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
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.
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)
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 |
-
1980
- 1980-03-07 JP JP2949580A patent/JPS56125703A/en active Pending
Cited By (3)
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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