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Retinal imaging device
专利权人:
Sivaraman Anand
发明人:
Sivaraman Anand,Kummaya Pramod,Nagarajan Shanmuganathan
申请号:
US14002339
公开号:
US09398851B2
申请日:
2011.08.28
申请国别(地区):
US
年份:
2016
代理人:
摘要:
A retinal imaging device and illumination module. The illumination module includes a light source to provide an incident beam along an illumination axis, a condenser lens at a spaced apart distance from the light source for condensing the incident beam and emanating a condensed incident beam, a transparent plate at a spaced apart distance from the condenser lens, wherein the transparent plate comprises a light absorber, at least one projections lens system to focus the condensed incident beam, a shield at a spaced apart distance from the projection lens system to yield a first partially blocked beam to form a comea illumination doughnut, and a perforated mirror comprising a hollow cylinder. A portion of the hollow cylinder protrudes out from a reflecting face of the mirror, forming an elliptical stopper to yield a second partially blocked beam to form a pupil illumination doughnut, enabling reflex-free imaging of the retina.
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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