| 摘要 |
PURPOSE:To easily reproduce the formation of a spot beam with a desired shape. CONSTITUTION:A cutter spot light forms a spot beam with the shape of an aperture enclosed by cutter blades by arranging a plurality of cutter blades which interrupt light passing through an aperture 11 of a mask 10 between a light source and a projection lens. Electrically driving means 61, 62, 63, 64 which separately move each cutter blade to change the shape of the aperture are arranged. A spot beam with a desired shape can 46 be reproduced by moving each cutter beam to a specified position since each outer blade is separately moved by motor operation. |
