Optical device and driving control method of optical device

A driving control method for an optical device comprising at least two moving groups that are movable along an optical axis and share portions of driving regions, the driving control method comprising:

• calculating a relationship formula between position coordinates of the at least two moving groups in one integrated coordinate system;
• and
• moving each of the at least two moving groups by using a control unit of the optical device such that the position coordinates of the at least two moving groups do not have a same value which makes a position of the most image-side surface of one of the at least two moving groups coincide with a position of the most object-side surface of the other of the at least two moving groups,
• wherein the at least two moving groups comprise a second moving group and a third moving group that are sequentially disposed from an object side to an image plane side, and
• wherein the position coordinates of the second moving group and the position coordinates of the third moving group satisfy the following relationship formula:
• X2=X3±|ΔW|
• where, X2 and X3 denote position coordinates of the second moving group and position coordinates of the third moving group in the integrated coordinates system, respectively, and ΔW denotes a difference between the position coordinates of the second moving group at the wide-angle end and the position coordinates of the third moving group at the far focus position.