发明授权
- 专利标题： Eye refractmeters using infrared rays
- 专利标题（中）： 使用红外线的眼部折射仪
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申请号： US92978申请日： 1979-11-09
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公开(公告)号： US4306778A公开(公告)日： 1981-12-22
- 发明人: Shinji Wada , Ikuo Kitao , Yasuo Kato , Taketoshi Ishihara , Yuji Sugahara
- 申请人： Shinji Wada , Ikuo Kitao , Yasuo Kato , Taketoshi Ishihara , Yuji Sugahara
- 申请人地址： JPX Tokyo
- 专利权人： Tokyo Kogaku Kikai Kabushiki Kaisha
- 当前专利权人： Tokyo Kogaku Kikai Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX53-139530 19781113
- 主分类号： A61B3/10
- IPC分类号： A61B3/10 ; A61B3/103
摘要：
Eye refractmeter using infrared rays in which the target projecting optical system includes an aperture disc having a semicircular apertures disposed within a circle corresponding to the pupil of the patient's eye with chord portions thereof opposed to each other with a spacing therebetween. The observing optical system includes a disc having a slot located at a position corresponding to the space between the apertures. The apertures and the slots are located in conjugate with the patient's pupil with respect to the objective lens.
公开/授权文献
- USD413124S Fuel dispensing unit 公开/授权日：1999-08-24