Shaped optical film, method of shaping optical film, and curved reflective polarizer

• Main Authors: KOTZ ARTHUR L, FAY WILLIAM T, AASTUEN DAVID J. W, ETTER JO A, JENNINGS ROBERT M
• Format: Patent
• Language: Chinese; English
• Published: 14.01.2022
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Shaping optical films, methods of shaping optical films, and curved reflective polarizers are described. A method of forming an optical film includes the steps of securing opposing first and second ends of the optical film, the first and second ends being spaced apart in a first direction; fixing opposite third and fourth end portions of the optical film, the third and fourth end portions being spaced apart in a second direction orthogonal to the first direction; providing a bending die surface; and shaping the optical film by bringing the optical film into contact with the bending die surface while stretching the optical film, thereby producing a bent optical film bent in at least a first direction, wherein stretching the optical film during the shaping step includes stretching the optical film in the first direction more than three times the stretching of the optical film in the second direction. 本发明描述了成形光学膜、使光学膜成形的方法和弯曲反射偏振器。一种使光学膜成形的方法，包括以下步骤：固定光学膜的相对的第一端部和第二端部，第一端部和第二端部沿第一方向间隔开；固定光学膜的相对的第三端部和第四端部，第三端部和第四