公开(公告)号：US10456021B2

公开(公告)日：2019-10-29

申请号：US15964383

申请日：2018-04-27

Applicant: OLYMPUS CORPORATION

Inventor： Yuichi Shiga ,  Toshiaki Mikami ,  Koichiro Yoshino ,  Satoshi Takekoshi

IPC: A61B1/045 ,  A61B1/00 ,  H04N5/232 ,  A61B1/04 ,  H04N5/235 ,  H04N9/04 ,  A61B1/055 ,  H04N5/225 ,  H04N9/73

Abstract: An endoscope apparatus includes an optical system including a focus lens, a connector to which an interchangeable optical system is connected, an image sensor configured to output a captured image based on the optical system and the interchangeable optical system, and a processor including hardware. The processor performs a determination process of determining whether the interchangeable optical system is a known or unknown optical system, implements a first step amount determination process when the interchangeable optical system is determined to be a known optical system, and implements a second step amount determination process when the interchangeable optical system is determined to be an unknown optical system and controls the focus lens based on step amount information determined.