HEAT-TREATABLE DICHROIC MIRRORS
    4.
    发明公开
    HEAT-TREATABLE DICHROIC MIRRORS 有权
    热处理的二色镜

    公开(公告)号:EP1125149A1

    公开(公告)日:2001-08-22

    申请号:EP99911316.0

    申请日:1999-03-11

    Abstract: A heat-treatable dichroic mirror, comprising a transparent substrate (12) having a glass transition temperature in the range of 650 - 800 °C, and a plurality of sputtered films (14, 16, 18) carried on said substrate and forming at least two pairs of contiguous films in which the films of each pair have disparate refractive indices differing by at least about 0.2 so as to provide between them a reflective interface (22). The films include an oxide of a metal such as titanium, a second film comprising an oxidizable metal or semi-metal such as silicon, and a protective overcoat (20) of a thickness and composition sufficient to substantially prevent permeation of oxygen therethrough when heat treated at said glass transition temperature. The mirror, after said heat treatment, exhibits a transmittance of at least 24% in the wavelength range of 550 - 650 nm, a reflectance of at least 45%, and a haze of not greater than about 1%.

    Abstract translation: 一种可热处理的二向色镜,包括玻璃化转变温度为650-800℃的透明基底(12)和多个溅射膜(14,16,18),所述溅射膜承载在所述基底上并至少形成 两对连续的薄膜,其中每一对薄膜具有相差至少约0.2的不同折射率,以便在它们之间提供反射界面(22)。 所述膜包括金属如钛的氧化物,包含可氧化金属或半金属如硅的第二膜,以及厚度和成分的厚度和成分(20),所述厚度和成分足以在热处理时基本上防止氧气透过 在所述玻璃化转变温度下。 在所述热处理之后,镜子在550-650nm的波长范围内显示至少24%的透射率,至少45%的反射率和不大于约1%的雾度。

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