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Raster matrix for reproduction techniques - consists of a photographically developed thin film fitted to a glass plate
Raster matrix for reproduction techniques - consists of a photographically developed thin film fitted to a glass plate
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机译:用于复制技术的光栅矩阵-由安装在玻璃板上的照相显影薄膜组成
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摘要
The matrix pattern is developed after a half tone vignetted exposure of the photographic emulsion on a transparent film. It is used as a distance raster for autotype image analysis by applying it to a transparent plate. A second plate is used as a protective cover. The method is claimed to be cost and labour saving. The raster reduces clouding effects and Newton rings and has good light transmission characteristics. In a typical arrangement the crystal glass plates are of equal thickness, with the grid matrix forming a sandwich of which the completely developed emulsion zones represent the maximum density and the partially developed zones the minimum density.
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