公开(公告)号：US10034606B2

公开(公告)日：2018-07-31

申请号：US15314463

申请日：2015-04-30

Applicant: NIDEK CO., LTD.

Inventor： Cesare Tanassi ,  Phil Buscemi ,  Federico Carraro ,  Andrea De Giusti ,  Mattia Minozzi ,  Simone Pajaro ,  Michele Pascolini ,  Nicola Codogno

IPC: A61B3/14 ,  A61B3/00 ,  A61B3/117

CPC classification number: A61B3/117 ,  A61B3/0025 ,  A61B3/0091 ,  A61B3/14

Abstract: An optical equipment suitable for observation of an iridocorneal annular zone of an eye including: an illumination assembly, including at least one illumination electric device for illuminating the zone with a plurality of illumination optical paths for illumination light beams going to a corresponding plurality of sub-portions, an image capturing assembly, including at least one image capturing electric device for capturing images of the zone with a plurality of imaging optical paths for imaging light beams coming from a corresponding plurality of sub-portions, and a front optical assembly having a front surface located close to front surface of an eye, a rear surface located far from front surface of an eye, and including a central portion between the front and rear surfaces and a lateral portion around the central portion; the front optical assembly is stationary; all imaging optical paths pass through central portion between the front and rear surfaces.

公开(公告)号：US12079958B2

公开(公告)日：2024-09-03

申请号：US17602622

申请日：2020-04-15

Applicant: NIDEK CO. LTD.

Inventor： Andrea Peroni ,  Andrea De Giusti ,  Michele Pascolini ,  Mattia Minozzi ,  Simone Pajaro

IPC: G06T7/13 ,  G06T5/50 ,  G06T5/70 ,  G06T5/90 ,  G06T7/30

CPC classification number: G06T5/50 ,  G06T5/70 ,  G06T5/90 ,  G06T7/13 ,  G06T7/30 ,  G06T2207/20028 ,  G06T2207/30041

Abstract: The method is used for creating an all-in-focus image of a portion of an iridocorneal angle of an eye starting from a plurality of images (610), these images being shallow field-depth images of that portion taken with different focus planes but with a same image frame; the method comprises the steps of: A) pre-processing (620) said plurality of images so to obtain a plurality of single-channel images if the images of said plurality are color images, B) calculating (630) an initial focus map starting from said plurality of single-channel images, C) creating (640) an initial estimated all-in-focus image starting from said initial focus map and said plurality of single-channel images, D) calculating (650) an initial edge map starting from said initial focus map and said plurality of single-channel images, E) iterating (660) a regularization process until a stop regularization condition is met, wherein the regularization process comprises removing one or more edge points of the initial edge map by considering a reference model of an iridocorneal angle of an eye, F) creating (670) said all-in-focus image starting from said plurality of images and a focus map last calculated in step E; the reference model expresses at least one geometrical parameter of a surface of an iridocorneal angle of an eye.

公开(公告)号：US09380939B2

公开(公告)日：2016-07-05

申请号：US13930748

申请日：2013-06-28

Applicant: NIDEK CO., LTD.

Inventor： Cesare Tanassi ,  Raffaella Bisson ,  Mauro Campigotto ,  Simone Pajaro ,  Ettore Cerulli

IPC: A61B3/00 ,  A61B3/15 ,  A61B3/12

CPC classification number: A61B3/152 ,  A61B3/12 ,  F04C2270/0421

Abstract: A fundus photographing apparatus includes: a photographing unit including a fundus illumination optical system to illuminate a fundus of a patient's eye and a fundus photographing optical system having a light receiving element to obtain a fundus image of the illuminated eye; and an alignment unit to position the photographing unit with the eye based on a predetermined alignment reference position. The alignment unit includes: an extracting part to extract, by image processing, an image region formed by reflection light from a portion other than the fundus from the fundus image obtained by the fundus photographing optical system; a gravity center calculating part to determine, by arithmetic processing, a gravity center position of the extracted image region; and a control part to perform alignment control of the photographing unit with the eye based on the calculated gravity center position and the alignment reference position.

Abstract translation: 眼底摄影装置包括：拍摄单元，包括用于照亮患者眼睛的眼底的眼底照明光学系统和具有光接收元件的眼底拍摄光学系统，以获得照明眼睛的眼底图像; 以及对准单元，用于基于预定的对准参考位置来将拍摄单元与眼睛定位。 对准单元包括：提取部，通过图像处理从由眼底拍摄光学系统获得的眼底图像中提取由来自眼底以外的部分的反射光形成的图像区域; 重心计算部，其通过算术处理来确定所提取的图像区域的重心位置; 以及控制部，其基于计算出的重心位置和对准基准位置，对眼睛进行拍摄单元的对准控制。