VARIABLE-FOCAL-DISTANCE LENS SYSTEM AND IMAGING DEVICE

This variable-focal-distance lens system is constituted from, in order from an object side to an image surface side, a first lens unit comprising a first lens element in which at least one lens surface thereof is configured as a free-form surface, a second lens unit comprising a second lens element in which at least one lens surface thereof is configured as a free-form surface, and third lens unithaving an aperture diaphragm and being constituted from a lens having a rotationally symmetrical shape, the first lens unit and the second lens unit being movable in a Y-axis direction and moving inmutually opposite directions from each other, whereby the synthetic refractive power of the first lens unit and the second lens unit is variable, a Z-axis being the optical axis of the third lens unit, the Y-axis being the axis orthogonal to the Z-axis on the image surface, and an X-axis being the axis orthogonal to the Y-axis and the Z-axis on the image surface. 本可变焦距透镜系统从物侧到像面侧依次由以下组件构成：第一透镜单元，包括其中至少一个透镜面被配置为自由形态面的第一透镜元件