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光感是什么意思
更新时间: 2019-05-21 00:00:00  

仅能感知光亮而不能辨认出眼前1m处手指的晃动。多数盲人保留有光感的残余视力。光值传感器。主要由一个光敏电阻和数据传输线组成。将光线的强弱以电阻值大小的形式返回给电脑或机器人。眼睛能感觉到光的光强度。人眼是非常敏感的,其绝对值是0.3烛光/平方英尺的十亿分之一。完全暗适应的人能看见50英里远的火光。光感不仅与光的强度有关,还与光的范围大小有关,并与其成正比。

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