| 摘要 |
PURPOSE:To introduce solar light widely and diffusively in the desired directions in buildings, by providing fine achromatic prism parts which provide the achromatic effect for diffused and colored light. CONSTITUTION:An achromatic prism plate 9 is formed by superposing a prism plate 5 having many inclined prism bodies 5b and an achromatic prism plate 7 having many prism bodies 7b. The plates 5, 7 are of the same shapes and the materials of the plates 5, 7 are so selected that the chromatic aberrations by the plate 5 are negated by the chromatic aberrations of the plate 7. The solar light is changed of directions and is introduced into buildings by abhering the plate 9 to the window 2 of the buildings. |
