| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a three-dimensional photographing system that maintains a wide range of a controllable convergence angle, and prevents the convergence angle from being changed by a zoom operation.SOLUTION: The optical device used in a three-dimensional photographing system utilizing parallax has: a convergence angle change optical element that changes a convergence angle in the three-dimensional photographing system; convergence angle control means that controls the convergence angle change optical element; a zoom lens that changes a focal length of an optical device; zoom control means that controls the zoom lens; and zoom range calculation means that calculates control range information on the zoom lens from an object convergence angle serving as a control object calculated by the convergence angle control means. The zoom control means is configured to control the zoom lens on the basis of control range information calculated by the zoom range calculation means.</p> |
