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    • 1. 发明授权
    • Method for forming an optical element
    • 光学元件的形成方法
    • US07611648B2
    • 2009-11-03
    • US11115415
    • 2005-04-27
    • Bernd WölfingEdgar PawlowskiUlrike StöhrRalf Biertümpfel
    • Bernd WölfingEdgar PawlowskiUlrike StöhrRalf Biertümpfel
    • B29D11/00
    • B29D11/00B29C43/021B29D11/00317B29D11/00365B29D11/00769B29L2011/0016C03B11/08C03B11/082C03B2215/41C03B2215/412C03B2215/65G02B5/18Y10S425/808Y10T428/24479
    • The invention relates to a process for forming an optical element. A forming tool is used having a plurality of molding or hot-embossing portions formed on a surface thereof for molding or hot-embossing optical structures onto a substrate. On the surface of the substrate there is formed at least one preformed portion. The substrate is heated to a temperature above a transition temperature and the forming tool and the substrate are pressed against each other for forming an optical element having a plurality of structures having an optical effect, wherein the shape of the structures having an optical effect is given by the respective associated molding or hot-embossing portion.According to the invention, when the forming tool and the substrate are pressed against each other, the respective preformed portion of the substrate first of all gets into contact to the associated molding or hot-embossing portion or to the forming tool at a central area so that a nip, which is formed between a surface of the respective preformed portion and a surface of the associated molding or hot-embossing portion or of said forming tool extends and broadens from said central area towards an edge of the respective preformed portion or of said substrate. According to the invention the substrate and said forming tool are provided with a substantially identical base so that the deformation ratio of the substrate is advantageously low.
    • 本发明涉及一种用于形成光学元件的方法。 使用形成工具,其具有形成在其表面上的多个模制或热压花部分,用于将光学结构模制或热压印到基底上。 在基板的表面上形成有至少一个预制部分。 将基板加热到高于转变温度的温度,并且成形工具和基板彼此压靠以形成具有多个具有光学效果的结构的光学元件,其中给出具有光学效果的结构的形状 通过各自相关联的模制或热压花部分。 根据本发明,当成形工具和基板彼此挤压时,基板的各个预成形部分首先在中心区域与相关联的模制或热压花部分或成形工具接触,从而 形成在相应的预成型部分的表面与相关联的模制或热压花部分或所述成形工具的表面之间的辊隙从所述中心区域朝向相应的预成形部分或所述成形工具的边缘的边缘延伸并变宽 基质。 根据本发明,衬底和所述成形工具设置有基本相同的基部,使得衬底的变形率有利地较低。