CURVED REFLECTIVE POLARIZER FILM AND METHODS OF SHAPING

To provide shaped optical films and methods of shaping optical films.SOLUTION: A method includes the steps of: securing at least portions of a perimeter of an optical film in a first plane so that the secured portions do not move relative to one another; and stretching the optical film by displacing...

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Bibliographische Detailangaben
Hauptverfasser: JO A ETTER, ROBERT M JENNINGS, YUN ZHISHENG, BENJAMIN G SONNEK, GREGG A AMBUR
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide shaped optical films and methods of shaping optical films.SOLUTION: A method includes the steps of: securing at least portions of a perimeter of an optical film in a first plane so that the secured portions do not move relative to one another; and stretching the optical film by displacing a portion of the optical film along at least a first direction perpendicular to the first plane such that one of radial and circumferential stretching of the optical film is substantially constant from a center 505 to the perimeter of the optical film and the other one of the radial and circumferential stretching of the optical film substantially changes from the center 505 to the perimeter of the optical film. The optical film may be a reflective polarizer including a plurality of polymer layers alternately arranged.SELECTED DRAWING: Figure 5 【課題】成形された光学フィルム及び光学フィルムを成形する方法が記載される。【解決手段】方法は、光学フィルムの外周の少なくとも一部分を第1の平面内に固定して、固定された部分が互いに対して移動しないようにする工程と、光学フィルムの半径方向及び円周方向での延伸の一方が光学フィルムの中心505から外周まで実質的に一定となり、かつ光学フィルムの半径方向及び円周方向での延伸の他方が光学フィルムの中心505から外周まで実質的に変化するように、光学フィルムの一部分を第1の平面に垂直な少なくとも第1の方向に沿って変位させることによって、光学フィルムを延伸させる工程と、を含む。光学フィルムは、交互配置された複数のポリマー層を含む反射型偏光子であってもよい。【選択図】図5