The Pioneer probes have on board ultra -violet instruments which are measuring light that we can't measure on the earth.
“先驱者号”太空探测器上装有紫外线仪器，能够对在地球上探测不到的光进行测量。
Light meter: An electrical exposure meter for measuring light intensity.
测光表：用来测量光强度的一种电子曝光表。
The linearity and chromaticity accuracy are important properties of a spectroradiometer for measuring light sources.
线性度与色座标测量精度是光源分光测色仪器的主要技术指标。
Applications such as measuring light with a photomultiplier tube generally require the use of a picoammeter due to the low current levels involved.
由于要测量的电流非常弱，所以用光电倍增管测量光的应用工作通常需要使用皮安计。
A system of measuring light power and wavelength is designed and fabricated, using Silicon Color Sensor with double PN junction as detector, single chip processor as controller and PC as processor.
设计并实现了一种用硅双结色敏器件作为探测器，单片机作为控制器，PC作为处理器和显示器的光功率、波长同步测量系统。
A system of measuring light power and wavelength is designed and fabricated, using Silicon Color Sensor with double PN junction as detector, single chip processor as controller and PC as processor.
设计并实现了一种用硅双结色敏器件作为探测器，单片机作为控制器，PC作为处理器和显示器的光功率、波长同步测量系统。
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