基于CCD客观式屈光度仪的研究

A Study on Objective Refractometer Based on CCD

描述了人眼屈光度仪的测量原理,设计了一套屈光度测量、采集处理、显示、打印系统.该系统是以一束红外脉冲光射入视网膜,由CCD接受视网膜反射的图像,将CCD图像进行数字化处理存入SRAM.CPU计算出人眼的屈光度值,并显示、打印出数据.该研究成果能准确测量人眼屈光度值.

This paper describes the principle of the refractometer measuerment of eye. In the paper, a collecting and processing system as well as displaying and printing system have been designed. In the system, an infrared ray goes into the eye, reflects from the bottom of eye and then are received by the CCD. The image formulated on CCD is processed into digital signal and stored in the SRAM. CPU can calculate the diopteric value of eye, display result on CRT and print them on paper. The method is reliable and practical. It can measure exactly the diopteric value of eye.