用这种电路替代原721型分光光度计中的光强调节电位器即可实现自动调节光强。
While substituting the regulation-resistor for light intensity adjustment on the spectrophotometer with this device, automatic adjustment of light intensity is realized.
在强调节能减排的今天，白光LED因为具有发光强度大，效率高，体积小等优点而被视为最具潜力的光源之一。
As one of the most promising light sources, white LED has many advantages, such as high luminous efficiency, high luminous intensity, long life period etc.
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