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1. 发明授权

US4710003A Cornea shape measuring apparatus 失效
标题翻译：角膜形状测量仪
公开(公告)号：US4710003A
公开(公告)日：1987-12-01
申请号：US833660
申请日：1986-02-21
申请人： Takashi Masuda , Yukitugu Nakamura , Kyoji Sekiguchi
发明人： Takashi Masuda , Yukitugu Nakamura , Kyoji Sekiguchi
IPC分类号： A61B3/107 , A61B3/10
CPC分类号： A61B3/107
摘要： In a cornea shape measuring apparatus wherein a chart for measurement is projected onto the cornea of an eye to be examined and the shape of the corneal reflection image thereof is detected through a measuring optical system to thereby measure the shape of the cornea, there is provided an observation optical system for enabling the corneal reflection image to be always observed. The magnification of the observation optical system is made smaller than the magnification of the measuring optical system and the fore eye portion and the corneal reflection image are always observable.
摘要翻译：在角膜形状测量装置中，其中通过测量光学系统检测用于测量的图表投影到待检查的眼睛的角膜上，并且通过测量光学系统检测其角膜反射图像的形状，从而测量角膜的形状，能够始终观察角膜反射图像的观察光学系统。使观察光学系统的放大率小于测量光学系统的倍率，并且始终可观察到前眼部分和角膜反射图像。

2. 发明授权

US4666269A Ophthalmologic apparatus 失效
标题翻译：眼科仪器
公开(公告)号：US4666269A
公开(公告)日：1987-05-19
申请号：US801500
申请日：1985-11-25
申请人： Yukitugu Nakamura , Kyoji Sekiguchi , Takashi Masuda
发明人： Yukitugu Nakamura , Kyoji Sekiguchi , Takashi Masuda
IPC分类号： A61B3/107 , A61B3/10
CPC分类号： A61B3/107
摘要： An ophthalmologic apparatus including an illuminating light source, an annular index, and an optical system for projecting the index from an infinite distance to a cornea of an eye to be examined, in which the index is formed integrally with the projecting optical system.
摘要翻译：一种眼科装置，包括照明光源，环形折射率和用于将指数从无限距离投射到被检眼的角膜的光学系统，其中指数与投影光学系统一体地形成。

3. 发明授权

US4660946A Cornea shape measuring method and apparatus 失效
标题翻译：角膜形状测量方法和装置
公开(公告)号：US4660946A
公开(公告)日：1987-04-28
申请号：US734234
申请日：1985-05-14
申请人： Yukitugu Nakamura , Takashi Masuda , Kyoji Sekiguchi
发明人： Yukitugu Nakamura , Takashi Masuda , Kyoji Sekiguchi
IPC分类号： A61B3/103 , A61B3/107 , A61B3/10
CPC分类号： A61B3/107 , A61B3/1035
摘要： A method and apparatus in which a predetermined index is projected onto the cornea of an eye to be examined and the shape of the cornea determining the refractive power, the degree of astigmatism, the direction of astigmatic axis, etc. of the cornea is measured from the general elliptical shape of the image of the index reflected by the cornea. Independently of the center of the ellipse, arbitrary position coordinates of at least five points of the image reflected by the cornea are detected, whereby the elliptical shape is calculated without enhancing the alignment accuracy in a plane perpendicular to the optical axis. The image reflected by the cornea may be electrically detected by position detects such as CCDs, whereby automation of the measurement is provided, coupled with the later signal processing. A strobo light is used for the projection of the index. Further, the shape of the cornea is obtained so that no measurement error may occur depending on a variation in operating distance, that is, without enhancing the positional accuracy in the direction of the optical axis.
摘要翻译：将预定指数投影到要检查的眼睛的角膜上并且确定角膜的屈光度，散光程度，散光轴方向等的角膜的形状的方法和装置，其从由角膜反映的指标的一般椭圆形状。独立于椭圆的中心，检测由角膜反射的图像的至少五个点的任意位置坐标，从而在不增加垂直于光轴的平面中的对准精度的情况下计算椭圆形状。由角膜反射的图像可以通过诸如CCD的位置检测来电检测，由此提供测量的自动化，并与随后的信号处理相结合。指示灯的投影使用闪光灯。此外，获得角膜的形状，使得根据操作距离的变化，即不增加光轴方向的位置精度，不会发生测量误差。

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