| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical bench which effectively performs learning, such as drawing of a figure indicating the way of advancing of light and superposition of colors of light, and is reduced in size and electric power consumption. SOLUTION: The optical bench is constituted by forming a light source unit 10 mounted with LEDs 15, 16 and 17 for three primary colors of light, a lens unit 20 mounted with a sheet lens 23 and a screen unit 30 mounted with a screen 33 by transparent side and bottom plates 11, 21 and 31 of respectively L shape in section extending to require lengths and attaching the light source, the lens and the screen to their respective one end. The lens unit 20 and the screen unit 30 are superposed on each other and are made slidable in the longitudinal direction with respect to the light source unit 10. COPYRIGHT: (C)2004,JPO&NCIPI
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