Patent ID: 9526402
Filing Date: 2016-12-27
CPC Classification: A61B,G02B

Claim Text:
1. An endoscope apparatus comprising: a first observation optical system which is arranged in an inserting section inserted into a lumen and configured to observe an observation target region in a first direction; a second observation optical system which is arranged in the inserting section and includes an annular shape configured to observe an observation target region in a second direction different from the first direction; a support member which supports the first observation optical system and the second observation optical system to have an optical axis that is the same; a pedestal which shields an angular region at part of the second observation optical system against light and is connected to the support member; an imaging section which acquires a combined image of (i) a first observation image based on the observation target region in the first direction, (ii) a second observation image based on the observation target region in the second direction, and (iii) an image of a non-image-forming region that provides a non-observation viewing field due to the pedestal; a frame which holds the imaging section and the respective observation optical systems so that a center of the imaging section is optically offset with respect to the optical axis of the respective observation optical systems in a direction extending toward a center of the light-shielded angular region; and an imaging optical system which magnifies the combined image at a magnification where part of the image on a circumference side of the non-image-forming region disappears and the second observation image readies both ends of a top and bottom of a light receiving surface of the imaging section without disappearing, by the offset.