WO2007072426A3 - Method of manufacturing a polarization retardation film - Google Patents

Method of manufacturing a polarization retardation film Download PDF

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Publication number
WO2007072426A3
WO2007072426A3 PCT/IB2006/054953 IB2006054953W WO2007072426A3 WO 2007072426 A3 WO2007072426 A3 WO 2007072426A3 IB 2006054953 W IB2006054953 W IB 2006054953W WO 2007072426 A3 WO2007072426 A3 WO 2007072426A3
Authority
WO
WIPO (PCT)
Prior art keywords
retardation film
polarization retardation
manufacturing
coating
polarization
Prior art date
Application number
PCT/IB2006/054953
Other languages
French (fr)
Other versions
WO2007072426A2 (en
Inventor
Mark T Johnson
Pim T Tuyls
Mireille A Reijme
Der Zande Bianca M I Van
Johan Lub
Original Assignee
Koninkl Philips Electronics Nv
Mark T Johnson
Pim T Tuyls
Mireille A Reijme
Der Zande Bianca M I Van
Johan Lub
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 Koninkl Philips Electronics Nv, Mark T Johnson, Pim T Tuyls, Mireille A Reijme, Der Zande Bianca M I Van, Johan Lub filed Critical Koninkl Philips Electronics Nv
Publication of WO2007072426A2 publication Critical patent/WO2007072426A2/en
Publication of WO2007072426A3 publication Critical patent/WO2007072426A3/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3016—Polarising elements involving passive liquid crystal elements
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/003—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/004—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using digital security elements, e.g. information coded on a magnetic thread or strip
    • G07D7/0047—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using digital security elements, e.g. information coded on a magnetic thread or strip using checkcodes, e.g. coded numbers derived from serial number and denomination

Abstract

The present invention relates to a method of manufacturing a polarization retardation film, the method comprising the steps of coating a surface (112) with a polymerizable mesogenic composition comprising a polymerizable mesogenic compound (113) and an isomerizable compound, inducing isomerization of non-mesogenic isomers in the composition, creating an anisotropic and an isotropic region in the coating by inducing phase separation of the polymerizable mesogenic composition, and polymerizing the coating in order to obtain a polarization retardation film. The invention also relates to a polarization retardation film generated thereby for use in security applications. The invention further relates to a system for identification/authentication using a polarization retardation film of objects associated with a polarization retardation film according to the present invention.
PCT/IB2006/054953 2005-12-23 2006-12-19 Method of manufacturing a polarization retardation film WO2007072426A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05112896 2005-12-23
EP05112896.5 2005-12-23

Publications (2)

Publication Number Publication Date
WO2007072426A2 WO2007072426A2 (en) 2007-06-28
WO2007072426A3 true WO2007072426A3 (en) 2007-10-11

Family

ID=35984904

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/054953 WO2007072426A2 (en) 2005-12-23 2006-12-19 Method of manufacturing a polarization retardation film

Country Status (1)

Country Link
WO (1) WO2007072426A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0807668D0 (en) 2008-04-28 2008-06-04 Innovia Films Ltd Method of authenticating a polymer film
GB2483638A (en) 2010-09-10 2012-03-21 Innovia Films Sarl Authentication of articles having a polymeric film by measuring thickness of film or layer within film by white light interferometry and/or by birefringence
CN102629000A (en) * 2012-03-26 2012-08-08 京东方科技集团股份有限公司 Three-dimensional (3D) display panel, manufacturing method thereof and display device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004083913A1 (en) * 2003-03-21 2004-09-30 Koninklijke Philips Electronics N.V. Birefringent optical element, lcd device with a birefringent optical element, and manufacturing process for a birefringent optical element
WO2004090025A1 (en) * 2003-04-08 2004-10-21 Merck Patent Gmbh Polymerised liquid crystal film with retardation or orientation pattern
US20050006481A1 (en) * 1998-11-12 2005-01-13 Wenyu Han Card with enhanced security features

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050006481A1 (en) * 1998-11-12 2005-01-13 Wenyu Han Card with enhanced security features
WO2004083913A1 (en) * 2003-03-21 2004-09-30 Koninklijke Philips Electronics N.V. Birefringent optical element, lcd device with a birefringent optical element, and manufacturing process for a birefringent optical element
WO2004090025A1 (en) * 2003-04-08 2004-10-21 Merck Patent Gmbh Polymerised liquid crystal film with retardation or orientation pattern

Also Published As

Publication number Publication date
WO2007072426A2 (en) 2007-06-28

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