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彩色电视摄象镜头的分光棱镜组简称分光棱镜或分色棱镜。它由四块棱镜和一块平面玻璃板胶合而成,其胶合有特殊性。在具体介绍胶合工艺以前,先来谈谈分光棱镜的结构和分光特性。分光棱镜的结构原理和分色顺序如图1所示。图中的d面为第一分色面,f面为第二分色面。d面法线与光轴的夹角为15°,f面法线与光轴的夹角为18°。第一棱镜的入射面α垂直于物镜的光轴。b面和c面、d面和e面之间都要求有5～10微米的空气间隙。入射光线进入棱镜后在d面上分
Color television camera lens dichroic prism group referred to as dichroic prism or dichroic prism. It consists of four prisms and a flat glass glued together, the glue has its own particularity. Before describing the gluing process in detail, let’s talk about the structure and spectral characteristics of the dichroic prism. The principle of the dichroic prism structure and color separation sequence shown in Figure 1. In the figure, d is the first dichroic surface and f is the second dichroic surface. d surface normal and the angle between the optical axis of 15 °, f surface normal and the angle between the optical axis of 18 °. The incident surface α of the first prism is perpendicular to the optical axis of the objective lens. b and c surface, d surface and e surface are required between the 5 to 10 micron air gap. Incident light into the prism d points on the points