| 摘要 |
PROBLEM TO BE SOLVED: To reduce complication for adjustment, and to reduce a size of device and its cost. SOLUTION: Switching means 3, 10-13, 16 for switching driving force due to one power source 9 provided in a drive means to be transmitted to any group selected from a focusing lens group 1 and zooming lens groups 4-6, and a control means for controlling the drive means and the switching means 3, 10-13, 16 and for switching the driving force to be transmitted to the focusing lens group 1, after finish of a zooming operation is detected, so as to conduct focus adjustment are provided in a projector provided with a projection lens having the focusing lens group 1 and the zooming lens groups 4-6 supported to be moved independently respectively, and the drive means for driving the respective lens groups 1, 4-6. |
