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眼底カメラ
专利权人:
株式会社ニデック
发明人:
市川 直樹,石川 聖浩
申请号:
JP2007291375
公开号:
JP5042784B2
申请日:
2007.11.08
申请国别(地区):
JP
年份:
2012
代理人:
摘要:
A fundus camera obtaining a favorable image with effective automatic alignment comprises a photographing optical system (10,30) having an optical axis (L1), directing illumination light to a fundus using a ring slit (17b) and photo-receiving the light, an alignment target projection optical system (50) , an alignment target detection optical system (60) comprising a photodetector (65), and means (80) for detecting alignment deviation direction and amount of the photographing system with respect to a reference working distance in a back/forth direction based on a photodetector signal, characterized by means (80) for setting a first alignment permissible range applying when the photographing system is deviated forward and a second range applying when deviated backward, regarding a working distance of the photographing system with respect to the eye with which the slit is placed at a position conjugate with a pupil as the reference distances, the first range narrower than the second range.
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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