Patent ID: 8033990
Filing Date: 2011-10-11
Classification: A61B,G02B,H04N

Abstract:
1. An endoscope insertion portion having an insertion axis in a longitudinal direction thereof, comprising: a distal end portion; a first image pickup portion disposed in the distal end portion, having a first longitudinal axis parallel to the insertion axis, and comprising a first observation optical system for condensing first photographing light and a first image pickup device, a first optical axis parallel to the insertion axis being set to the first observation optical system; and a second image pickup portion disposed in the distal end portion, having a second longitudinal axis parallel to the insertion axis and to the first longitudinal axis of the first image pickup portion to provide an axis of vision parallel to the first image pickup portion, and comprising a second observation optical system for condensing second photographing light and a second image pickup device, a second optical axis parallel to the insertion axis and to the first optical axis being set to the second observation optical system, wherein the first and second image pickup portions are configured such that the first image pickup device connected to a proximal-most end portion of the first observation optical system and the second image pickup device connected to a proximal-most end portion of the second observation optical system are located at different positions from each other in a direction of the insertion axis, by setting a length from a distal-most end to a proximal-most end of the first observation optical system to be greater in the direction of the insertion axis than a length from a distal-most end to a proximal-most end of the second observation optical system to avoid the first and second image pickup devices from being close to each other.