| 摘要 |
PURPOSE:To execute color separation and color synthesis of transmitted light of a prism effectively by constructing a cube prism by allowing each vertex of four rectangular prisms having thin film layers for selectively reflecting color light on two edges forming a right angle therebetween to contact coincidently. CONSTITUTION:Thin film layers for selectively reflecting red(R) and blue(B) color light from each dichroic mirror are formed on two edges of a rectangular prism 20 forming a right angle therebetween, by vapor deposition. The four rectangular prisms 20 are allowed to contact so as the vertex of each right angle coincide to each other and allowing one of the two edges forming a right angle of the rectangular prism 20 to contact, thus forming a cube prism 30. White light 31 is made incident to a surface of the cube prism 30 at right angles, and separated into three primary colors R, B, and G by the respective selective reflection film. Since the cube prism is constituted of four rectangular prisms, transmitted light through the prism is converted completely to color synthesized light or color separated light.
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