DEVICE FOR CARRYING LENS FOR VARYING VALID FOCUS DISTANCE ACCORDING TO RELATIVE DISTANCE BETWEEN LENSES OF OPTICAL APPARATUS FOR ZOOM FUNCTION

摘要

PURPOSE: A lens carrier is provided to compact the size of a zoom lens portion by simplifying the structure of a lens driving unit. CONSTITUTION: Lenses(1) are located inside lens barrels(6,7). Guide grooves(6a,7a) are formed in the lens barrels to move the lenses forward and backward through a rotation. A ring-typed piezoelectric actuator(10) is located near the lens barrels and shrunken and expanded in a radius direction according to a signal input. A driving member(30) is installed in the piezoelectric actuator. The driving member contains many segments(31) to spread toward the lens barrels for contacting each other. Thereby, the rotating structure of the lens barrels is simplified and compacted.