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公开(公告)号：EP0890120A1
公开(公告)日：1999-01-13
申请号：EP97908781.0
申请日：1997-02-28
Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
Inventor： WEBER, Michael, F. , OUDERKIRK, Andrew, J. , STOVER, Carl, A.
CPC classification number: G02B27/283 , G02B5/287 , G02B5/305 , G02B5/3083 , G02B27/142 , Y10S359/90
Abstract: A nonpolarizing beamsplitter (10) is provided, comprising a multilayered stack (11) of alternating layers (A, B) of a first material and a second material. The first material layers (A) are uniaxially birefringent, and the second material layers (B) are optionally uniaxially birefringent or isotropic. The layers have index of refraction relationships such that for an incident beam having a useful bandwidth, a p-polarized component and an s-polarized component striking the beamsplitter at any angle of incidence υ within a desired range, the beamsplitter exhibits substantially the same average reflectivity for the p-polarized component of the incident beam as for the s-polarized component. The invention also includes a method of making a nonpolarizing beamsplitter.
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公开(公告)号：EP0883824A1
公开(公告)日：1998-12-16
申请号：EP97916742.0
申请日：1997-02-28
Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
Inventor： ALLEN, Richard, C. , CARLSON, Lockwood, W. , OUDERKIRK, Andrew, J. , WEBER, Michael, F. , KOTZ, Arthur, L. , NEVITT, Timothy, J. , STOVER, Carl, A. , MAJUMDAR, Biswaroop
CPC classification number: G02B5/3083 , G02B5/3008 , G02B5/305
Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix in combination with light directing materials to enable control of light emitted from a lighting fixture or display. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film, and the light directing materials are chosen to control the direction of polarized light reflected from or transmitted by the optical film.
Abstract translation: 提供了一种光学薄膜，其包括布置在连续双折射基质内的聚合物颗粒的分散相以及光定向材料，以控制从照明器材或显示器发射的光。 通常通过沿一个或多个方向拉伸来定向膜。 分散相颗粒的大小和形状，分散相的体积分数，薄膜厚度和取向量被选择为获得期望波长的电磁辐射的期望程度的漫反射和总透射率 薄膜，并且选择导光材料以控制从光学膜反射或透射的偏振光的方向。
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公开(公告)号：EP0736187A1
公开(公告)日：1996-10-09
申请号：EP95905367.0
申请日：1994-12-20
Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
Inventor： OUDERKIRK, Andrew, J. , WEBER, Michael, F. , JONZA, James, M. , STOVER, Carl, A.
CPC classification number: G02B5/3025 , B29C55/023 , B29D11/00 , B32B7/02 , B32B27/36 , G02B5/305 , G02B5/3083 , G02F1/133536 , G02F1/13362 , G02F2001/133545
Abstract: A reflective polarizer and a dichroic polarizer are combined to provide an improved optical polarizer. The dichroic and reflective polarizers are typically in close proximity to each other, and are preferably bonded together to eliminate the air gap between the polarizers. The combination of the two polarizers provides a high reflectivity of one polarization and high transmission for the perpendicular polarization from the reflective polarizer side of the combined polarizer, and high absorption and transmission for light of orthogonal polarization from the dichroic polarizer side. The combination also reduces iridescence as seen in transmission and when viewed in reflection from the dichroic polarizer side. The increased extinction ratio and low reflectivity of the optical polarizer allows use of a lower extinction ratio dichroic polarizer in applications requiring a given extinction ratio and high transmission.
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公开(公告)号：EP1047537B1
公开(公告)日：2010-03-17
申请号：EP99901464.0
申请日：1999-01-13
Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
Inventor： NEAVIN, Terence, D. , HEBRINK, Timothy, J. , STOVER, Carl, A. , LIU, Yaoqi, Joe , NERAD, Bruce, A. , OUDERKIRK, Andrew, J.
IPC: B29C47/70
CPC classification number: B29C47/707 , B29C47/0019 , B29C47/0021 , B29C47/065 , B29C47/862 , B29C47/92 , B29C2947/92647 , B29C2947/92704 , B29C2947/92904 , B29C2947/92923 , G11B7/24
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Patent Agency Ranking
公开(公告)号：EP0883821B1
公开(公告)日：2003-05-28
申请号：EP97904835.2
申请日：1997-01-17
Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
Inventor： OUDERKIRK, Andrew, J. , CARLSON, Lockwood, W. , KOTZ, Arthur, L. , NEVITT, Timothy, J. , STOVER, Carl, A. , WEBER, Michael, F. , ALLEN, Richard, C. , MAJUMDAR, Biswaroop
IPC: G02B5/30
CPC classification number: G02B5/3008 , G02B5/305 , G02B5/3083 , G02F2001/133545
Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
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公开(公告)号：EP0999928B1
公开(公告)日：2002-09-11
申请号：EP98930481.1
申请日：1998-06-24
Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
Inventor： WEBER, Michael, F. , STOVER, Carl, A. , MERRILL, William, W. , OUDERKIRK, Andrew, J.
CPC classification number: G02B5/287 , B29C47/0021 , B29C47/065 , B29C47/145 , B29K2067/00 , B32B27/36 , G02B1/10
Abstract: A method for making multilayer optical films is provided in which the degradation of the optical extinction of the thinnest optical layers is avoided by casting these layers close to the casting wheel.
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公开(公告)号：EP0735952B1
公开(公告)日：2000-03-22
申请号：EP95910854.9
申请日：1994-12-20
Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
Inventor： OUDERKIRK, Andrew, J. , WEBER, Michael, F. , JONZA, James, M. , STOVER, Carl, A.
CPC classification number: B29C55/023 , B29D11/00 , B29K2995/003 , B29K2995/0034 , B32B7/02 , B32B27/08 , B32B27/36 , G02B5/3025 , G02B5/305 , G02B5/3083 , G02B27/283 , G02F1/133536 , G02F1/13362 , G02F2001/133545
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公开(公告)号：EP0736196A1
公开(公告)日：1996-10-09
申请号：EP95905914.0
申请日：1994-12-20
Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
Inventor： OUDERKIRK, Andrew, J. , WEBER, Michael, F. , JONZA, James, M. , STOVER, Carl, A. , COBB, Sanford, Jr. , WORTMAN, David, L. , BENSON, Olester, Jr.
CPC classification number: G02F1/13362 , G02B5/305 , G02B27/283 , G02F1/133536 , G02F2001/133545
Abstract: A multiple layer reflective polarizer (12) is described. This element is placed between an optical cavity (24) and an LCD module (16) to form an optical display. The reflective polarizer reflects some light into the optical cavity (24) where it is randomized and may ultimately emerge with the correct polarization to be transmitted out of the display.
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公开(公告)号：EP0735952A1
公开(公告)日：1996-10-09
申请号：EP95910854.0
申请日：1994-12-20
Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
Inventor： OUDERKIRK, Andrew, J. , WEBER, Michael, F. , JONZA, James, M. , STOVER, Carl, A.
CPC classification number: B29C55/023 , B29D11/00 , B29K2995/003 , B29K2995/0034 , B32B7/02 , B32B27/08 , B32B27/36 , G02B5/3025 , G02B5/305 , G02B5/3083 , G02B27/283 , G02F1/133536 , G02F1/13362 , G02F2001/133545
Abstract: The present invention includes a multilayered polymer film (10) comprising a body of a plurality of alternating layers (12) of a crystalline naphthalene dicarboxylic acid polyester and another selected polymer (14) wherein the layers have a thickness of less than 0.5 micrometer and wherein the crystalline naphthalene dicarboxylic acid polyester layer has a higher index of refraction associated whith at least one in-plane axis adjoining layers of the selected polymer.
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