Patent ID: 9485405
Filing Date: 2016-11-01
CPC Classification: A61B,G02B,G03B,H04N

Claim Text:
1. A focus control device comprising: a memory having instructions stored therein; and a processor which executes the instructions stored in the memory to: control a focus of an imaging optical system, and set a focus mode of the imaging optical system, the imaging optical system including at least a zoom lens that adjusts an optical magnification, wherein the zoom lens is movable by a motor between a wide-angle side and a telescopic side relative to a reference point that is situated between a wide-angle end and a telescopic end; and acquire, with an image sensor, an image through the imaging optical system, wherein: the focus mode includes a fixed focus mode and an autofocus (AF) mode, the processor switches the focus mode between the fixed focus mode and the AF mode in correspondence with whether the zoom lens is positioned by the motor on the wide-angle side or the telescopic side relative to the reference point, and the processor controls the focus so that an in-focus object distance monotonously decreases when a position of the zoom lens has moved from the wide-angle side toward the telescopic side in a state in which the fixed focus mode is selected as the focus mode.