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公开(公告)号：US20210041355A1
公开(公告)日：2021-02-11
申请号：US16965632
申请日：2019-01-28
发明人： Joseph R. Nesbitt , Steven P. Floeder , Michael L. Ruegsegger , Crystal A. Dehn , Arthur L. Kotz
IPC分类号： G01N21/3563 , G01N21/359 , G01N21/86 , G01N21/88
摘要： System and technique for inspecting a moving film by measuring the levels of light transmission through a thickness dimension of the film are described. The system includes a light source configured to provide light including a particular wavelength, or a particular range of wavelengths. The light from the light source is directed toward a first surface of the film, and an image capturing device is located adjacent to the light source on a second side of the film opposite the first surface, the image capturing device configured to measure the levels of light intensity exiting a second surface of the film. Measurements of the level of the light intensity passing through the film may be spatially synchronized to physical positions along the film to generated at least one roll map indicative of light transmission characteristics of the film over the imaged portions of the film.
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公开(公告)号：US20240165907A1
公开(公告)日：2024-05-23
申请号：US18522621
申请日：2023-11-29
CPC分类号： B32B1/00 , B29C51/428 , B29D11/00644 , B29D11/0073 , B29D11/00932 , B32B2307/416
摘要： An optical film includes a plurality of polymeric layers shaped along orthogonal first and second directions. A first curve being an intersection of the optical film with a first plane orthogonal to the second direction and to a reference plane has a best-fit first circular arc subtending a first angle at a center of curvature of the first circular arc of greater than 180 degrees where the optical film has a maximum projected area in the reference plane. A second curve being an intersection of the optical film with a second plane orthogonal to the first direction and to the reference plane has a best-fit second circular arc subtending a second angle at a center of curvature of the second circular arc of at least 30 degrees. Reflectance and transmittance of the optical film are described.
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公开(公告)号：US11927783B2
公开(公告)日：2024-03-12
申请号：US17054247
申请日：2019-07-11
发明人： John D. Le , Zhisheng Yun , Timothy L. Wong , Timothy J. Nevitt , Adam D. Haag , Arthur L. Kotz
IPC分类号： G02B5/30
CPC分类号： G02B5/305
摘要： Optical films, such as reflective polarizer films, and optical systems including the optical films are described. An optical system includes one or more optical lenses having at least one curved major surface, a partial reflector, and a reflective polarizer. For a substantially normally incident light in a predetermined wavelength range extending at least from about 450 nm to about 600 nm: the partial reflector has an average optical reflectance of at least 30%, and the reflective polarizer has an average optical reflectance Rs for a first polarization state, an average optical transmittance Tp for an orthogonal second polarization state, and an average optical reflectance Rp for the second polarization state, where Tp≥80%, Rp≤1%, and 50%≤Rs≤95%.
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公开(公告)号：US20230194765A1
公开(公告)日：2023-06-22
申请号：US18070074
申请日：2022-11-28
发明人： Timothy L. Wong , David J.W. Aastuen , Arthur L. Kotz , Benjamin G. Sonnek , Matthew C. Dachel , John D. Le
IPC分类号： G02B5/30
CPC分类号： G02B5/3083
摘要： A polymeric optical lens has an optical retardance. A same principal axis of the optical retardance can have an orientation within about 5 degrees of a same first direction for each location in at least 60% of a continuous first region of the polymeric optical lens. The first region includes at least 60% of a largest optically active region of the polymeric optical lens. The optical retardance is greater than 10 nm in at least a portion of the largest optically active region.
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公开(公告)号：US11358355B2
公开(公告)日：2022-06-14
申请号：US16754825
申请日：2018-10-23
摘要： Optical films having a curved shaped and methods of shaping optical films are described. A method of shaping an optical film includes the steps of disposing the optical film adjacent first and second rollers spaced apart along a first direction, securing opposing first and second ends of the optical film, providing a curved mold surface, and shaping the optical film by contacting the optical film with the curved mold surface while stretching the optical film along the first direction and keeping a threshold distance between closest points on the optical film contacting the first roller and contacting the curved mold surface less than the width of the optical film to reduce buckling of the optical film.
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