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红外偏心摄影验光仪的研究

Hong-wei YE,Xiang-ning LI,Jie CHEN,Zhen-yong ZHANG

Optical Instruments（2005）

Cited 2|Views360
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Abstract
摄影验光是一种根据一定距离拍摄的眼瞳图像快速确定屈光误差的测量方法.通过光线追迹阐明了偏心摄影验光的基本原理.为了能够测量散光和提高测量性能,提出采用近红外发光二极管作为摄影验光仪光源并改进了光阑结构,引入由光源在视网膜上反射图像的照度斜率来判断屈光状态这一独特检测方法.对拍摄的模拟眼图像加以处理分析,验证该方案的可行性,作为进一步研制实用化摄影验光仪的理论依据.
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Key words
refractive state,slope of the intensity,IR LED,photorefractor
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