Photons of light striking an array of capacitors create an electrical charge proportional to their intensity, which the charge-coupler transforms into voltage.
光子撞击电容器阵列，产生与其强度成正比的电荷，而电荷耦合器又将它转换成电压。
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Aerospace series - elements of electrical and optical connection - Test methods - Part 704: electrical elements - Measurement of turns ratio on a transformer used in a coupler.