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Fundus camera
专利权人:
Tomoyuki Iwanaga
发明人:
Tomoyuki Iwanaga,Nobuyoshi Kishida,Hideyuki Ohban,Shinya Tanaka
申请号:
US12428384
公开号:
US09004684B2
申请日:
2009.04.22
申请国别(地区):
US
年份:
2015
代理人:
摘要:
A fundus camera includes a focus target projection unit including a focus target located at a position conjugate with a fundus of a subjects eye, a split optical element configured to split a light flux passing through the focus target, and a focus target illumination light source configured to illuminate the focus target, a fundus photographing optical system including a focusing lens, a focus link mechanism configured to interlockingly move the focus target projection unit and the focusing lens in a direction of an optical axis, at least two lenses located behind a plane optically conjugate with the imaging plane of the fundus photographing optical system and outside an optical axis of the fundus photographing optical system, image sensors respectively located behind the two lenses, and a phase difference detection unit configured to detect a phase difference between the focus target images based on signals output from the image sensors.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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