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    Transparency, a method for forming it and a photographic mask whose optical densities are correlated with the contour of a surface
    1.
    发明授权
    Transparency, a method for forming it and a photographic mask whose optical densities are correlated with the contour of a surface 失效
    透明度，其形成方法和光密度与表面轮廓相关的照相掩模

    公开(公告)号：US4414317A

    公开(公告)日：1983-11-08

    申请号：US370415

    申请日：1982-04-21

    申请人： Charles R. Culp ,  Larrimore B. Emmons ,  Walter J. Lewicki, Jr.

    发明人： Charles R. Culp ,  Larrimore B. Emmons ,  Walter J. Lewicki, Jr.

    IPC分类号： G03F1/00 ,  G03F7/00 ,  B05B5/00 ,  B32B3/00 ,  B65B33/00

    CPC分类号： G03F7/0037 ,  G03F1/50 ,  Y10T428/24521

    摘要： Disclosed is a transparency, a method for forming it and a photographic mask having variations in optical density corresponding to deviations of a surface contour from a plane of an original surface. The transparency is a composite two layer, transparent, preferably resinous structure with a contoured interface between the layers. The transparency may be made by forming a first conformed transparent layer on the contoured surface of a substrate. A second conformed transparent layer is then formed on the contoured surface of the first transparent layer. One of said first or second transparent layers is uniformly colored, the other of said layers may be uncolored, or have a less intense, uniform, similar, or different color. Each of the layers has a refractive index substantially equal to that of the other layer at all points. Light may be passed through the transparency in substantially unrefracted rays, and in amounts related to the thickness of the most intensely colored layer. A photographic mask, or plate having variations in optical density corresponding to those of the transparency may be formed by passing light through the transparency onto a film, or plate positioned thereunder.

    摘要翻译： 公开了一种透明度，其形成方法和具有与表面轮廓与原始表面的平面的偏差对应的光密度变化的照相掩模。 透明度是复合的两层，透明，优选树脂结构，其中层之间具有轮廓界面。 透明度可以通过在衬底的轮廓表面上形成第一符合透明层来进行。 然后在第一透明层的轮廓表面上形成第二配合透明层。 所述第一或第二透明层之一均匀地着色，所述层中的另一层可以是未着色的，或者具有不太强烈，均匀，相似或不同的颜色。 各层的折射率在所有点都具有基本上等于另一层的折射率。 光可以以基本上未折射的光线通过透明物，并且以与最强烈着色层的厚度相关的量。 可以通过使光通过透明物通过位于其下的膜或板上而形成具有与透明度相对应的光密度变化的照相掩模或板。