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公开(公告)号：US4060725A
公开(公告)日：1977-11-29
申请号：US667320
申请日：1976-03-16
申请人： Shuji Hoshika
发明人： Shuji Hoshika
CPC分类号： G02B7/28
摘要： A focal plane detecting device is disclosed which uses an optical fiber system located within a rotating motor shaft or the like to scan an image plane and to deliver the scanned light to a stationary means, such as a photoconductor for developing a contrast signal. The optical system includes at least one optical fiber having its light incident end a fixed distance away from the axis of rotation of the shaft, but facing in the axial direction so as to scan a circular-like pattern of the plane wherein the light incident surface exists. The optical fiber extends through the shaft and exits in such a manner as to direct light therefrom upon a light detector at least part of the time that the shaft is rotating. Preferably the optical system includes a pair of optical fibers each having light incident ends symmetrically about the axis of rotation of the shaft and separated by a distance of .DELTA.Z along the axis of rotation. The axial separation results in the two optical fibers scanning corresponding potions of two image planes separated by .DELTA.Z. This permits the development of image signals representing the slightly separated planes and the comparison of said signals with each other to determine the position of the focal plane relative to the two image planes.
摘要翻译： 公开了一种焦平面检测装置，其使用位于旋转电机轴等内的光纤系统来扫描图像平面并将扫描的光传送到诸如用于显影对比度信号的光电导体的固定装置。 光学系统包括至少一个光纤，其光入射端与轴的旋转轴线固定距离，但是在轴向方向上面对，以扫描平面的圆形图案，其中光入射面 存在 光纤延伸穿过轴并且以这样的方式离开，以便在轴正在旋转的至少一部分时间内将光从光检测器引导到光检测器。 优选地，光学系统包括一对光纤，每对光纤具有围绕轴的旋转轴对称的光入射端，并沿着旋转轴线分开DELTA Z的距离。 轴向分离导致两个光纤扫描由DELTA Z分开的两个图像平面的相应部分。这允许显示表示稍微分离的平面的图像信号和所述信号彼此的比较以确定焦平面的位置 相对于两个图像平面。
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公开(公告)号：US4540253A
公开(公告)日：1985-09-10
申请号：US635472
申请日：1984-07-30
申请人： Shuji Hoshika , Hideyuki Ishiai , Yukiyasu Nishikawa , Masato Hara , Hirochika Aiura , Ikuzo Okamoto , Osamu Shindow
发明人： Shuji Hoshika , Hideyuki Ishiai , Yukiyasu Nishikawa , Masato Hara , Hirochika Aiura , Ikuzo Okamoto , Osamu Shindow
CPC分类号： A61B3/103
摘要： A method and apparatus for measuring eye refraction errors in which a plurality of infrared patterns are projected onto an eye to be measured. The reflected light is directed onto corresponding light sensitive detectors the outputs of which are coupled through bandpass filters, an automatic gain control circuit and an A/D converter to a microprocessor. The microprocessor analyses the digitized outputs calculating refraction powers in accordance with a disclosed nonlinear regression technique. The refraction errors of the eye, along with a reliability coefficient, are calculated in accordance with the thusly determined refraction powers.
摘要翻译： 一种用于测量眼睛折射误差的方法和装置，其中将多个红外图案投影到要测量的眼睛上。 反射光被引导到对应的光敏检测器，其输出通过带通滤波器耦合，自动增益控制电路和A / D转换器耦合到微处理器。 微处理器根据公开的非线性回归技术分析计算折射能力的数字化输出。 根据所确定的折射能量计算眼睛的折射误差以及可靠性系数。
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公开(公告)号：US4518859A
公开(公告)日：1985-05-21
申请号：US331345
申请日：1981-12-16
申请人： Shuji Hoshika
发明人： Shuji Hoshika
摘要： A scale board carries a scale having a predetermined pitch and a light source projects this scale onto an array of sensors having a pitch which is substantially but not exactly equal to the pitch of the scale. By comparing successive pairs of sensor outputs, the angular position of the scale board can be determined to a resolution much smaller than the scale pitch.
摘要翻译： 刻度板带有具有预定间距的刻度，并且光源将该刻度投影到具有基本上但不完全等于刻度的间距的间距的传感器阵列上。 通过比较连续的传感器输出对，刻度板的角位置可以确定为比刻度间距小得多的分辨率。
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公开(公告)号：US4486080A
公开(公告)日：1984-12-04
申请号：US259622
申请日：1981-05-01
申请人： Kiyoshi Itoh , Yukiyasu Nishikawa , Shuji Hoshika , Masato Hara , Hideyuki Ishiai , Ikuzo Okamoto , Osamu Shindow
发明人： Kiyoshi Itoh , Yukiyasu Nishikawa , Shuji Hoshika , Masato Hara , Hideyuki Ishiai , Ikuzo Okamoto , Osamu Shindow
CPC分类号： A61B5/1103 , A61B3/10 , A61B5/6821
摘要： An opthalmological instrument including a blinking detecting device for positively detecting when an eye is blinking to thereby eliminate errors in optical measurements due to variations in the signal light produced by the blinking. An optical system receives light beams reflected from a portion of an eye under examination to form an image of the front portion of the eye in an image plane. An image pickup element is disposed at the image plane and produces an output video signal in response thereto. A detecting circuit which receives the video signal determines whether or not the image pickup element exceeds a predetermined threshold value. If the threshold value is not exceeded, an indication is produced that blinking has occurred.
摘要翻译： 一种眼科仪器，包括一个闪烁检测装置，用于积极地检测眼睛何时闪烁，从而消除由于眨眼产生的信号光的变化导致的光学测量误差。 光学系统接收从被检查的眼睛的一部分反射的光束，以在图像平面中形成眼睛前部的图像。 图像拾取元件设置在图像平面处，并响应于此产生输出视频信号。 接收视频信号的检测电路确定图像拾取元件是否超过预定阈值。 如果不超过阈值，则会产生发生闪烁的指示。
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公开(公告)号：US4432617A
公开(公告)日：1984-02-21
申请号：US225221
申请日：1981-01-15
申请人： Kiyoshi Itoh , Yukiyasu Nishikawa , Shuji Hoshika , Ikuzo Okamoto
发明人： Kiyoshi Itoh , Yukiyasu Nishikawa , Shuji Hoshika , Ikuzo Okamoto
CPC分类号： A61B3/103
摘要： A device for measuring the refractive error of an eye in which refractive powers in a plurality of longitudinal directions are simultaneously measured with a high S-N ratio with a high accuracy. A movable chart is provided in a predetermined direction in a plane perpendicular to an optical axis of an optical system which projects the image of the chart onto the retina of the eye being examined. Measuring means measures the refractive error of the eye in accordance with the state of the optical system at the position thereof at which the image projected onto the retina is in focus. The chart has plural striped patterns which are oriented at different angles from one another.
摘要翻译： 用于测量眼睛的屈光不正的装置，其中以高精度同时以高S-N比测量多个纵向方向上的折射力。 在垂直于光学系统的光轴的平面中沿预定方向设置活动图，该光学系统将图表的图像投影到被检眼的视网膜上。 测量装置根据在投影到视网膜上的图像焦点的位置处的光学系统的状态来测量眼睛的屈光不正。 该图表具有以彼此不同的角度定向的多个条纹图案。
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