【摘要】 描述了人眼光焦度的测量原理。设计了一套光焦度测量采集处理系统。该系统是以一束红外脉冲光射入眼底 ,由CCD接受反射的眼底图像 ,将CCD图像进行数字化处理并存入SRAM。CPU采用重心法计算图像环中心坐标 ,以扫描法计算图像环的长、短轴 ,最后计算出人眼的光焦度值。研究结果表明 ,光焦度测量采集处理系统工作可靠、实用 ,能准确地测量人眼光焦度值更多还原

【Abstract】 The principle of the dioptric m easuerment of eye is described. A collecting and processing system is designed f or the dioptric measurement. In the system, an infrared ray is shot into the ey e, and is reflected from the bottom of eye, and is received by the CCD. The imag e is processed into digit signal, and is stored in the SRAM. Center coordinate is calculated by CPU with center of gravity methods, the major axis and minor ax is are calculated by the scanning method, and the dioptric value of eye is calcu lated. The method is reliable and practical. It can measure exactly the dioptric value of eye.更多还原