WO2005026793A1 - Durable optical element - Google Patents

Durable optical element Download PDF

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Publication number
WO2005026793A1
WO2005026793A1 PCT/US2004/029603 US2004029603W WO2005026793A1 WO 2005026793 A1 WO2005026793 A1 WO 2005026793A1 US 2004029603 W US2004029603 W US 2004029603W WO 2005026793 A1 WO2005026793 A1 WO 2005026793A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical film
film according
polymerized
durable
durable optical
Prior art date
Application number
PCT/US2004/029603
Other languages
English (en)
French (fr)
Inventor
Clinton L. Jones
Brant U. Kolb
Emily S. Goenner
John T. Brady
Christopher A. Haak
Original Assignee
3M Innovative Properties Company
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
Priority claimed from US10/662,085 external-priority patent/US7074463B2/en
Application filed by 3M Innovative Properties Company filed Critical 3M Innovative Properties Company
Priority to EP04788684A priority Critical patent/EP1664860A1/en
Priority to JP2006526317A priority patent/JP2007505359A/ja
Publication of WO2005026793A1 publication Critical patent/WO2005026793A1/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0231—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites

Definitions

  • FIG. 1 is a schematic view of an illustrative micro-structured article of the present invention in a bac lit liquid crystal display
  • FIG. 2 is a perspective view of an illustrative polymerized structure bearing a micro-structured surface
  • FIG. 3 is a cross-sectional view of an illustrative micro-structured article which has prism elements of varying height
  • FIG. 4 is a cross-sectional view of an illustrative micro-structured article which has prism elements of varying height
  • FIG. 5 is a cross-sectional view of an illustrative micro-structured article
  • FIG. 1 is a schematic view of an illustrative micro-structured article of the present invention in a bac lit liquid crystal display
  • FIG. 2 is a perspective view of an illustrative polymerized structure bearing a micro-structured surface
  • FIG. 3 is a cross-sectional view of an illustrative micro-structured article which has prism elements of varying height
  • Brightness enhancing films generally enhance on-axis luminance (referred herein as "brightness") of a lighting device.
  • Brightness enhancing films can be light transmissible, microstructured films.
  • the microstructured topography can be a plurality of prisms on the film surface such that the films can be used to redirect light through reflection and refraction.
  • NALCO products 1040, 1042, 1050, 1060, 2327 and 2329 Suitable fumed silicas include for example, products sold under the tradename,AEROSIL series OX-50, -130, -150, and - 200 available from DeGussa AG, (Hanau, Germany), and CAB-O-SPERSE 2095, CAB- O-SPERSE A105, CAB-O-SLL M5 available from Cabot Corp. (Tuscola, HI.). Zirconia nanoparticles can have a particle size from 5 to 50 nm, or 5 to 15 nm, or 10 nm.
  • the mixture comprising the inorganic sol and surface modifying agents is subsequently reacted at room or an elevated temperature, with or without mixing, hi one method, the mixture can be reacted at about 85 degree C for about 24 hours, resulting in the surface modified sol.
  • the surface treatment of the metal oxide can preferably involve the adsorption of acidic molecules to the particle surface.
  • the surface modification of the heavy metal oxide preferably takes place at room temperature.
  • the surface modification of ZrO2 with silanes can be accomplished under acidic conditions or basic conditions. In one case the silanes are heated under acid conditions for a suitable period of time. At which time the dispersion is combined with aqueous ammonia (or other base).
  • a cyclic functional group subject to ring opening polymerization generally contains a heteroatom such as oxygen, sulfur or nitrogen, and preferably a 3-membered ring containing oxygen such as an epoxide.
  • the optical layer or micro-structured layer can be formed from a wide variety of polymeric material including the partial listing of polymeric material described herein.
  • This layer can be formed from high index of refraction materials, including monomers such as high index of refraction (meth) acrylate monomers, halogenated monomers, and other such high index of refraction monomers as are known in the art. See, for example, U.S. Pat. Nos. 4,568,445; 4,721,377; 4,812,032; and 5,424,339, all incorporated by reference herein.
  • the polymerizable composition can be of flowable viscosity that is low enough that air bubbles do not become entrapped in the composition and that the full microstructure geometry is obtained.
  • Reactive diluents are typically mono- or di- functional monomers such as SR-339, SR-256, SR-379, SR-395, SR-440, SR-506, CD- 611, SR-212, SR-230, SR-238, and SR-247 available from Sartomer Co., Exton, PA.
  • Reactive diluents with refractive index greater than 1.50, like SR-339, may be preferred.
  • Oligomeric materials, particularly those with high refractive index, are also useful.
  • micro-structure topography can be similar to the molding process described in U.S. Patent No. 5,691,846 which is incorporated by reference herein.
  • the micro-structure article according to the invention can be formed from a continuous process at any desired length such as, for example, 5, 10,
  • the height or width of the prism elements may be changed within practicable limits—it is practicable to machine precise prisms in ranges extending from about 1 micron to about 200 microns.
  • the dihedral angles may be changed or the prism axis may be tilted to achieve a desired optical effect.
  • the width of the first zone can be less than about 200 to 300 microns.
  • One purpose of the prism side angle variation is to spread and add variable amounts of optical power into the first light redirecting element 526.
  • the varying configuration of prisms 538, 540 and 542 serves to provide substantially uniform sampling of the input aperture of the lightguide, which minimizes non-uniformities in the light extracted from the lightguide 516.
  • the microstructure includes a plurality of ridges extending along a first surface. These ridges can be rounded to a radius in a range of 4 to 7 micrometers.
  • FIG. 14 is a schematic diagram of an illustrative apparatus 700 for determining scratch contrast ratio.
  • the apparatus 700 generally includes a light source or backlight 710, a polymerized optical film structure having a microstructured surface and a scratch on the microstructured surface 720 disposed on the backlight 710, a detector 730 configured to acquire image data from the scratch.
  • the detector 730 being disposed above the optical film 720 and a computer 740 configured to manipulate the image data and calculate a maximum contrast ratio for the scratched optical film 720.
  • Example 1 Nalco 2327(1200.00 g) was charged to a 2 liter Ehrlenmeyer flask. l-Methoxy-2- propanol (1350.3 g), Silane A174 (57.09 g), and PEG2TES (28.19 g) were mixed together and added to the colloidal dispersion while stirring. The contents of the flask were poured into three 32oz sealed jars. The jars were heated at 80°C for 16 hours. This resulted in a clear, low viscosity dispersion of surface modified colloidal silica nanoparticles.
  • PEG2TES refers to N-(3-triethoxysilylpropyl) methoxyethoxyethyl carbamate.
  • the resin dispersion contained approximately 38.5% SiO2 and approximately 2 % 1- methoxy-2-propanol as measured by gas chromatography. One percent by weight of Darocure 1173 was added to this resin dispersion. Tins example was photo-cured at 2 J/cm 2 .

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Surface Treatment Of Optical Elements (AREA)
PCT/US2004/029603 2003-09-12 2004-09-13 Durable optical element WO2005026793A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04788684A EP1664860A1 (en) 2003-09-12 2004-09-13 Durable optical element
JP2006526317A JP2007505359A (ja) 2003-09-12 2004-09-13 耐久性光学素子

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US10/662,085 US7074463B2 (en) 2003-09-12 2003-09-12 Durable optical element
US10/662,085 2003-09-12
US10/939,184 2004-09-10
US10/939,184 US7179513B2 (en) 2003-09-12 2004-09-10 Durable optical element

Publications (1)

Publication Number Publication Date
WO2005026793A1 true WO2005026793A1 (en) 2005-03-24

Family

ID=34316889

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/029603 WO2005026793A1 (en) 2003-09-12 2004-09-13 Durable optical element

Country Status (4)

Country Link
EP (1) EP1664860A1 (enrdf_load_stackoverflow)
JP (1) JP2007505359A (enrdf_load_stackoverflow)
KR (1) KR20060121919A (enrdf_load_stackoverflow)
WO (1) WO2005026793A1 (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007067692A1 (en) * 2005-12-06 2007-06-14 Ubright Optronics Corporation Luminance enhancement optical substrates with anti-chatter structures
WO2008120416A1 (ja) * 2007-02-27 2008-10-09 Konica Minolta Opto, Inc. 光学用複合材料、その製造方法、及び光学用複合材料を用いた光学素子
JP2009516063A (ja) * 2005-11-15 2009-04-16 スリーエム イノベイティブ プロパティズ カンパニー 輝度向上フィルム及び無機ナノ粒子を表面処理する方法
US7618164B2 (en) 2005-06-09 2009-11-17 Ubright Optronics Corporation Moire reducing optical substrates with irregular prism structures
US7883647B2 (en) 2006-06-30 2011-02-08 Ubright Optronics Corporation Method of making luminance enhancement optical substrates with optical defect masking structures
US7957621B2 (en) * 2008-12-17 2011-06-07 3M Innovative Properties Company Light extraction film with nanoparticle coatings
US8535576B2 (en) 2008-12-15 2013-09-17 3M Innovative Properties Company High refractive index inorganic oxide nanoparticles comprising surface treatment and polymerizable resin
WO2021152411A1 (en) * 2020-01-29 2021-08-05 3M Innovative Properties Company Retroreflective element and retroreflective film

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008023612A1 (fr) * 2006-08-25 2008-02-28 National University Corporation The University Of Electro-Communications Composition photosensible comprenant une microparticule composite organique/zircone
JP2008249962A (ja) * 2007-03-30 2008-10-16 Nippon Carbide Ind Co Inc 再帰反射シート
JP2018180099A (ja) 2017-04-05 2018-11-15 スリーエム イノベイティブ プロパティズ カンパニー 親水性ハードコート積層体、及びその製造方法
KR102038143B1 (ko) * 2018-04-16 2019-11-26 박성민 탈부착 사용이 가능한 빛 반사패치

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5626800A (en) * 1995-02-03 1997-05-06 Minnesota Mining And Manufacturing Company Prevention of groove tip deformation in brightness enhancement film
US5760126A (en) * 1996-12-20 1998-06-02 Minnesota Mining And Manufacturing Company Aqueous fluorochemical compositions and abrasion-resistant coatings therefrom
US5898523A (en) * 1997-07-02 1999-04-27 Minnesota Mining & Manufacturing Company Tiled retroreflective sheeting composed of highly canted cube corner elements
US6356391B1 (en) * 1999-10-08 2002-03-12 3M Innovative Properties Company Optical film with variable angle prisms
WO2002045129A2 (en) * 2000-11-29 2002-06-06 Nanophase Technologies Corporation Substantially transparent, abrasion-resistant films containing surface-treated nanocrystalline particles
US20030165680A1 (en) * 2001-11-21 2003-09-04 3M Innovative Properties Company Nanoparticles having a rutile-like crystalline phase and method of preparing same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08217991A (ja) * 1995-02-02 1996-08-27 Minnesota Mining & Mfg Co <3M> 放射線硬化性材料
JP2001133607A (ja) * 1999-08-25 2001-05-18 Sumitomo Chem Co Ltd 光散乱層、光散乱板、カラーフィルタおよびそれを用いた液晶表示装置
JP4177637B2 (ja) * 2002-10-28 2008-11-05 Ｔｄｋ株式会社 ノングレア処理された物体の製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5626800A (en) * 1995-02-03 1997-05-06 Minnesota Mining And Manufacturing Company Prevention of groove tip deformation in brightness enhancement film
US5760126A (en) * 1996-12-20 1998-06-02 Minnesota Mining And Manufacturing Company Aqueous fluorochemical compositions and abrasion-resistant coatings therefrom
US5898523A (en) * 1997-07-02 1999-04-27 Minnesota Mining & Manufacturing Company Tiled retroreflective sheeting composed of highly canted cube corner elements
US6356391B1 (en) * 1999-10-08 2002-03-12 3M Innovative Properties Company Optical film with variable angle prisms
WO2002045129A2 (en) * 2000-11-29 2002-06-06 Nanophase Technologies Corporation Substantially transparent, abrasion-resistant films containing surface-treated nanocrystalline particles
US20030165680A1 (en) * 2001-11-21 2003-09-04 3M Innovative Properties Company Nanoparticles having a rutile-like crystalline phase and method of preparing same

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7618164B2 (en) 2005-06-09 2009-11-17 Ubright Optronics Corporation Moire reducing optical substrates with irregular prism structures
US8517573B2 (en) 2005-06-09 2013-08-27 Ubright Optronics Corporation Moire reducing optical substrates with irregular prism structures
JP2009516063A (ja) * 2005-11-15 2009-04-16 スリーエム イノベイティブ プロパティズ カンパニー 輝度向上フィルム及び無機ナノ粒子を表面処理する方法
WO2007067692A1 (en) * 2005-12-06 2007-06-14 Ubright Optronics Corporation Luminance enhancement optical substrates with anti-chatter structures
US7712944B2 (en) 2005-12-06 2010-05-11 Ubright Optronics Corporation Luminance enhancement optical substrates with anti-chatter structures
US7883647B2 (en) 2006-06-30 2011-02-08 Ubright Optronics Corporation Method of making luminance enhancement optical substrates with optical defect masking structures
US8367186B2 (en) 2006-06-30 2013-02-05 Ubright Optronics Corporation Luminance enhancement optical substrates with optical defect masking structures
WO2008120416A1 (ja) * 2007-02-27 2008-10-09 Konica Minolta Opto, Inc. 光学用複合材料、その製造方法、及び光学用複合材料を用いた光学素子
US8535576B2 (en) 2008-12-15 2013-09-17 3M Innovative Properties Company High refractive index inorganic oxide nanoparticles comprising surface treatment and polymerizable resin
US8821770B2 (en) 2008-12-15 2014-09-02 3M Innovative Properties Company High refractive index inorganic oxide nanoparticles comprising surface treatment and polymerizable resin
US7957621B2 (en) * 2008-12-17 2011-06-07 3M Innovative Properties Company Light extraction film with nanoparticle coatings
WO2021152411A1 (en) * 2020-01-29 2021-08-05 3M Innovative Properties Company Retroreflective element and retroreflective film

Also Published As

Publication number Publication date
KR20060121919A (ko) 2006-11-29
EP1664860A1 (en) 2006-06-07
JP2007505359A (ja) 2007-03-08

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