| 摘要 |
PROBLEM TO BE SOLVED: To provide a cutter device for a spotlight superior excellent in reproducibility of blade position and easy for fine adjusting, and with no possibility of a blade plate deviating from the aperture part. SOLUTION: A cutter blade 2 turns with the center of an aperture part as support point by the engagement of a gear member 24 and guide holes 5. By rotating an operation shaft (thread shaft) 23, a blade plate 21 turns integrally with a female thread member 22. Compared with prior art, where a blade plate 21 freely slides, this constitution provides superior reproducibility and easy fine adjusting, and enables to cut light passing through the aperture part in an arbitrary shape, without the possibility of the blade plate 21 deviating from the aperture part. |
