光敏电阻是一种电阻值随入射光强度而变化的电阻,也称为光电导探测器。入射光强度和电阻降低,而入射光较弱,电阻增加。还有另一种入射光弱,电阻减小,入射光强,电阻增大。光敏电阻一般用于光的测量、光的控制和光电转换。常用的光敏电阻硫化镉光敏电阻,是由半导体材料制成。
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