| 摘要 |
PURPOSE:To simplify the control means for a driving source and a lens moving mechanism in constitution by mounting the driving source on a lens system holding base and moving the whole lens system, and moving part of the lens system by the same driving source through cam transmission. CONSTITUTION:The whole lens system 2 is moved in an optical-axis direction and the gap between some lenses of the lens system 2 is varied to perform magnification conversion; and the lens system holding base 3 which holds the whole lens system 2 and guides the lens system 2 movably in the optical-axis direction is provided. Further, a motor 12 which is fitted to this holding base 3 to drive the holding base 3 through a movement transmitting means and a transmitting means which is driven by the motor 12 to vary the lens gap between some lenses of the lens system 2 are provided. |
