Patent ID: 7418200
Filing Date: 2008-08-26
Classification: G02B

Abstract:
1. An optical unit of a collapsible type having an optical axis in which at least one lens barrel is movable along the direction of the optical axis with respect to a fixed barrel and image-pickup means provided behind said lens barrel, comprising: a zoom lens frame having a zoom lens, said zoom lens frame within the one lens barrel and movable along the direction of the optical axis, said zoom lens being capable of setting a zoom range by changing a position in said optical axis direction by movement of said zoom lens toward a telephoto position when said zoom lens is between a collapsed position and the telephoto position; and position-detecting means provided within the fixed barrel for detecting a position of the zoom lens frame, wherein a position of said zoom lens frame is detected by the position-detecting means between said collapsed position and a wide position, and wherein a position of said zoom lens frame is not detected by the position-detecting means between the wide position and the telephoto position.