Patent ID: 8611736
Filing Date: 2013-12-17
Classification: G02B,G03B,H04N

Abstract:
1. An image sensing device comprising: a lens group having a magnification adjustment lens and a focus adjustment lens; a focus evaluation detection section for detecting a focus evaluation value which evaluates an in-focus state of the lens group; a lens in-focus trajectory data storage section for storing lens in-focus trajectory data which is pre-determined data to indicate a lens position of the lens group in the in-focus state; a reference target object distance storage section for storing a target object distance; and a system control section having a first mode to simultaneously operate and automatically set the in-focus state of the lens group, a second mode to drive the magnification adjustment lens or the focus adjustment lens based on a user command, and a third mode to transition to the first mode under a pre-determined condition in the second mode, and to automatically set the in-focus state of the lens group, wherein the system control section stores a target object distance as a reference target object distance in the reference target object distance storage section based on the lens focusing trajectory data when the focus adjustment lens is driven by the user command in the second mode, drives the focus adjustment lens so as to retain the reference target object distance not based on a current target object distance but based on the lens in-focus trajectory data and the reference target object distance when the magnification adjustment lens is driven by the user command, and transitions to the second mode again without updating the reference target object distance after the third mode.