| 摘要 |
PROBLEM TO BE SOLVED: To prevent the moving path of a shutter blade which slides and moves from being restricted by a guide rod for guiding the movement of a movable lens. SOLUTION: The movable lenses are arranged before and behind a shutter mechanism 14 used also as a diaphragm, respectively. The movement of a pair of movable lenses is guided by a pair of guide rods 26 and 27 arranged in one direction crossing an optical axis 23. A pair of shutter blades 48 and 49 are arranged movably in one direction in the shutter mechanism 14 used also as a diaphragm. Slots 72 to 75 through which the guide rods 26 and 27 are inserted and which guide the movement of the shutter blades 48 and 49 are provided on the pair of shutter blades 48 and 49 so as not to restrict the moving path of shielding plates 48 and 49 which slide and move by the pair of guide rods 26 and 27. COPYRIGHT: (C)2007,JPO&INPIT
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