公开(公告)号：US20190142249A1

公开(公告)日：2019-05-16

申请号：US16232682

申请日：2018-12-26

Applicant: OLYMPUS CORPORATION

Inventor： Yutaka KOYAMA

IPC: A61B1/00 ,  A61B1/05 ,  G02B23/24

Abstract: An endoscope objective optical system consists of in order from an object side, a front group having a negative refractive power, an aperture stop, and a rear group having a positive refractive power, wherein either the front group or the rear group includes one or more than one cemented lens, and the cemented lens includes a lens having a positive refractive power and a lens having a negative refractive power, and the rear group includes a positive lens which is a single lens, on the object side, and the following conditional expressions (1), (2), (3), and (4) are satisfied. 1.1

公开(公告)号：US20230000329A1

公开(公告)日：2023-01-05

申请号：US17903195

申请日：2022-09-06

Applicant: OLYMPUS CORPORATION

Inventor： Hidetaro KONO ,  Yutaka KOYAMA ,  Kotaro OGASAWARA

IPC: A61B1/06 ,  A61B1/04

Abstract: A medical image processing device includes a processor configured to: obtain image data; generate, based on the obtained image data, a captured image including color component signals including a red component signal representing a red component, a green component signal representing a green component, and a blue component signal representing a blue component; calculate an intensity ratio between a fluorescent component signal and a reflected light component signal in a pixel of the captured image; determine, based on the calculated intensity ratio in the pixel of the captured image, a fluorescence region and a background region in the captured image; and generate a fluorescence image by performing, based on a result of the determination, image processing with parameters different from each other for color component signals in pixels positioned in the fluorescence region and color component signals in pixels positioned in the background region.

公开(公告)号：US20200292804A1

公开(公告)日：2020-09-17

申请号：US16886858

申请日：2020-05-29

Applicant: OLYMPUS CORPORATION

Inventor： Yutaka KOYAMA ,  Akari MORITA

IPC: G02B23/24 ,  G02B9/34 ,  A61B1/05

Abstract: An objective optical system includes, in order from an object side to an image side, a front group having a negative refractive power, an aperture stop, and a rear group having a positive refractive power. The front group includes a negative single lens, the rear group includes, in order from the object side, a positive single lens and one or more cemented lenses, and following conditional expressions (1), (2), (3), and (5) are satisfied. 1.95