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公开(公告)号：US4356513A
公开(公告)日：1982-10-26
申请号：US237811
申请日：1981-02-24
CPC分类号： H04N1/193
摘要： A video signal composing circuit and method for aligning scanned CCD's in an optical reading device in which plural scanned CCD's are arranged in a line parallel to a reading surface. Clock pulses are counted which correspond to the scanning of the CCD's and compared with values set by plural switch groups. The outputs of the comparison circuits are coupled through a logic circuit which combines and gates the individual video output signals from the CCD's to produce a composite video signal which is free of overlap in video signals between adjacent CCD's.
摘要翻译： 一种用于对准扫描CCD在光学读取装置中的视频信号组合电路和方法，其中多个扫描的CCD被布置在与读取表面平行的行中。 计数对应于CCD的扫描的时钟脉冲，并与由多个开关组设置的值进行比较。 比较电路的输出通过逻辑电路耦合，该逻辑电路组合并对来自CCD的各个视频输出信号进行门控，以产生在相邻CCD之间的视频信号中没有重叠的复合视频信号。
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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：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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