| 摘要 |
Power from a focusing motor ( 14 ) is transmitted via a gear ( 35 a) to a focusing lead screw ( 15 ) so that a first lens holder ( 4 ) is moved in a direction of an optical axis. Power from a zooming motor ( 10 ) is transmitted via a gear ( 35 b) to a zooming lead screw ( 11 ) so that a second lens holder ( 8 ) is moved in the direction of the optical axis. The first and second lens holders ( 4, 8 ), the focusing and zooming lead screws ( 15, 11 ), the focusing and zooming motors ( 14, 10 ), and the gears ( 35 a, 35 b) are contained in a housing ( 30, 31 ). The focusing motor ( 14 ) and the zooming motor ( 10 ) may be fixed to a gear case ( 30 ).
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