photo cell

基本解釋

Integrating devices use the photo cell pulse output to determine total amount of turning.
積分裝置利用光電池的脈沖輸出來確定旋轉(zhuǎn)的總量。
http://www.iciba.com
High precision photo-cell color-mark slotting system, correct cutting position, when no candy, the packing film will stop.
高精密度光電色標(biāo)跟蹤系統(tǒng)，切刀位置準(zhǔn)確，無糖不送紙裝置。
This machine technology is advanced, no second hoisting, reduced because of many times given photo-cell and lifting the damage;
該機(jī)工藝先進(jìn)，不用二次吊裝，減少了因多次吊裝對坯體的損傷；
zjzhongyang.com

Cell phones had cameras for at least that long before the traditional photo taking and processing business was seriously threatened.
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a device in which the photoelectric or photovoltaic effect or photoconductivity is used to produce a current or voltage when exposed to light or other electromagnetic radiation. They are used in exposure meters, burglar alarms, etc (Also called photoelectric cell, electric eye)