Patent ID: 8773765
Filing Date: 2014-07-08
Classification: A61B,G02B

Abstract:
1. An endoscope apparatus comprising: an endoscope inserted into a tube cavity; an objective optical system mounted at a distal end portion of the endoscope and configured to form an image of an object in the tube cavity, the objective optical system including a focusing lens movable in an optical axis direction and satisfying conditional expressions (1) and (2); a solid-state image pickup device for color image pickup configured to pick up the image formed by the objective optical system, the solid-state image pickup device satisfying a conditional expression (3) below and a color separation filter being arranged for each pixel in the solid-state image pickup device; a focus adjusting mechanism configured to move the focusing lens and automatically adjust the objective optical system to a focused state; a moving range switching section configured to perform switching of a moving range of the focusing lens; a moving range limiting section configured to limit the moving range using a signal in association with the switching by the moving range switching section; and a setting information storing section configured to store information for adjusting the objective optical system to a plurality of focused states with the focus adjusting mechanism in the moving range limited by the moving range limiting section, wherein the focusing lens includes a plurality of moving ranges not overlapping each other, each of the moving ranges including a plurality of focus positions, where, IH represents a distance from a center in an image pickup region to a most distant position of the solid-state image pickup device, f represents a focal length of the objective optical system, f