WO2002023258A3 - Optical sheets suitable for spreading light - Google Patents

Optical sheets suitable for spreading light Download PDF

Info

Publication number
WO2002023258A3
WO2002023258A3 PCT/US2001/025221 US0125221W WO0223258A3 WO 2002023258 A3 WO2002023258 A3 WO 2002023258A3 US 0125221 W US0125221 W US 0125221W WO 0223258 A3 WO0223258 A3 WO 0223258A3
Authority
WO
WIPO (PCT)
Prior art keywords
prisms
light
refraction
normally
incident light
Prior art date
Application number
PCT/US2001/025221
Other languages
French (fr)
Other versions
WO2002023258A2 (en
Inventor
Michael C Lea
Charles A Marttila
Original Assignee
3M Innovative Properties Co
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 US09/646,363 external-priority patent/US6456437B1/en
Application filed by 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to AU2001281245A priority Critical patent/AU2001281245A1/en
Publication of WO2002023258A2 publication Critical patent/WO2002023258A2/en
Publication of WO2002023258A3 publication Critical patent/WO2002023258A3/en

Links

Classifications

    • 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
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0263—Diffusing elements; Afocal elements characterised by the diffusing properties with positional variation of the diffusing properties, e.g. gradient or patterned diffuser
    • 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
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • 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
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Abstract

An optical sheet (25) for spreading light has a substantially smooth surface (27), and a structured surface (28) comprising an array of prisms (30, 31). A beam of light that is to be spread is directed through the film from the smooth surface. Some of the prisms (termed 'refraction prisms') deviate normally-incident light only by refraction at a prism facet as the light leaves the film while others (termed 'reflection prisms') deviates normally-incident light by total internal reflection within the prism before the light leaves the film. There are a plurality of reflection prisms (30) selected to deviate normally-incident light through different angles and a plurality of refraction prisms (31) selected to deviate the normally-incident light through different angles, and they are arranged, preferably in a non-ordered manner, so that successive reflection prisms are separated by at least one refraction prism.
PCT/US2001/025221 2000-09-14 2001-08-10 Optical sheets suitable for spreading light WO2002023258A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001281245A AU2001281245A1 (en) 2000-09-14 2001-08-10 Optical sheets suitable for spreading light

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/646,363 US6456437B1 (en) 1999-01-14 2000-09-14 Optical sheets suitable for spreading light
US09/646,363 2000-09-14

Publications (2)

Publication Number Publication Date
WO2002023258A2 WO2002023258A2 (en) 2002-03-21
WO2002023258A3 true WO2002023258A3 (en) 2003-02-06

Family

ID=24592761

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/025221 WO2002023258A2 (en) 2000-09-14 2001-08-10 Optical sheets suitable for spreading light

Country Status (2)

Country Link
AU (1) AU2001281245A1 (en)
WO (1) WO2002023258A2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2389171A (en) * 2002-05-02 2003-12-03 Indigitale Ltd Distributor for lighting apparatus
GB0427607D0 (en) 2004-12-16 2005-01-19 Microsharp Corp Ltd Structured optical film
DE102005027799B4 (en) * 2005-06-16 2007-09-27 Saint-Gobain Glass Deutschland Gmbh Method for producing a transparent pane with a surface structure and apparatus for carrying out the method
SE0600675L (en) * 2006-03-24 2007-02-20 Prismalence Ab Lighting fixture with a cover glass which includes parallel projecting cams
AT509563B1 (en) 2010-03-01 2015-10-15 Hierzer Andreas LIGHT WITH LIGHTING ELEMENTS
WO2012141899A1 (en) * 2011-04-14 2012-10-18 Bright View Technologies Corporation Light transmissive structures and fabrication methods for controlling far-field light distribution
WO2015095189A1 (en) 2013-12-19 2015-06-25 Bright View Technologies Corporation 2d deglaring diffusers increasing axial luminous intensity
MX2019003219A (en) * 2016-09-21 2019-10-24 Solatube Int Inc Daylight collectors with diffuse and direct light collection.
WO2019192934A1 (en) * 2018-04-03 2019-10-10 Signify Holding B.V. Lighting system for outdoor lighting

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB759325A (en) * 1954-08-27 1956-10-17 Owens Illinois Glass Co Control of daylighting
US3068754A (en) * 1958-07-30 1962-12-18 Corning Giass Works Prismatic light transmitting panel
US4411493A (en) * 1981-10-05 1983-10-25 Miller Jack V Seasonal control skylight glazing panel with passive solar energy switching
US4755921A (en) * 1986-04-02 1988-07-05 Minnesota Mining And Manufacturing Company Lens
EP0426411A2 (en) * 1989-10-30 1991-05-08 Minnesota Mining And Manufacturing Company Light fixture with beam shaping lens
JPH0682635A (en) * 1992-07-07 1994-03-25 Sekisui Chem Co Ltd Surface light source device
US5655830A (en) * 1993-12-01 1997-08-12 General Signal Corporation Lighting device
US5661603A (en) * 1994-09-05 1997-08-26 Olympus Optical Co., Ltd. Image display apparatus including a first and second prism array
WO1997031276A1 (en) * 1996-02-21 1997-08-28 Milner Peter J A light-diverting optical element
WO1997039369A1 (en) * 1996-04-12 1997-10-23 Minnesota Mining And Manufacturing Company Variable pitch structured optical film
EP0846914A1 (en) * 1996-12-05 1998-06-10 C.R.F. Società Consortile per Azioni Lighting device for generating a rectangular pattern at the work area, e.g. for illuminating pedestrian crossings
US5771328A (en) * 1995-03-03 1998-06-23 Minnesota Mining And Manufacturing Company Light directing film having variable height structured surface and light directing article constructed therefrom
WO1998048312A1 (en) * 1997-04-22 1998-10-29 Minnesota Mining And Manufacturing Company Prismatic light beam homogenizer for projection displays
WO2000042451A1 (en) * 1999-01-14 2000-07-20 Minnesota Mining And Manufacturing Company Optical sheets suitable for spreading light

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB759325A (en) * 1954-08-27 1956-10-17 Owens Illinois Glass Co Control of daylighting
US3068754A (en) * 1958-07-30 1962-12-18 Corning Giass Works Prismatic light transmitting panel
US4411493A (en) * 1981-10-05 1983-10-25 Miller Jack V Seasonal control skylight glazing panel with passive solar energy switching
US4755921A (en) * 1986-04-02 1988-07-05 Minnesota Mining And Manufacturing Company Lens
EP0426411A2 (en) * 1989-10-30 1991-05-08 Minnesota Mining And Manufacturing Company Light fixture with beam shaping lens
JPH0682635A (en) * 1992-07-07 1994-03-25 Sekisui Chem Co Ltd Surface light source device
US5655830A (en) * 1993-12-01 1997-08-12 General Signal Corporation Lighting device
US5661603A (en) * 1994-09-05 1997-08-26 Olympus Optical Co., Ltd. Image display apparatus including a first and second prism array
US5771328A (en) * 1995-03-03 1998-06-23 Minnesota Mining And Manufacturing Company Light directing film having variable height structured surface and light directing article constructed therefrom
WO1997031276A1 (en) * 1996-02-21 1997-08-28 Milner Peter J A light-diverting optical element
WO1997039369A1 (en) * 1996-04-12 1997-10-23 Minnesota Mining And Manufacturing Company Variable pitch structured optical film
EP0846914A1 (en) * 1996-12-05 1998-06-10 C.R.F. Società Consortile per Azioni Lighting device for generating a rectangular pattern at the work area, e.g. for illuminating pedestrian crossings
WO1998048312A1 (en) * 1997-04-22 1998-10-29 Minnesota Mining And Manufacturing Company Prismatic light beam homogenizer for projection displays
WO2000042451A1 (en) * 1999-01-14 2000-07-20 Minnesota Mining And Manufacturing Company Optical sheets suitable for spreading light

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 333 (P - 1759) 23 June 1994 (1994-06-23) *

Also Published As

Publication number Publication date
WO2002023258A2 (en) 2002-03-21
AU2001281245A1 (en) 2002-03-26

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