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首页> 外文期刊>Applied optics >COMPACT LIGHT-OMITTING-DIODE SUN PHOTOMETER FOR ATMOSPHERIC OPTICAL DEPTH MEASUREMENTS
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COMPACT LIGHT-OMITTING-DIODE SUN PHOTOMETER FOR ATMOSPHERIC OPTICAL DEPTH MEASUREMENTS

机译：紧凑型发光二极管太阳光度计，用于大气深度测量

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摘要

A new compact light-emitting diode (LED) sun photometer, in which a LED is used as a spectrally selective photodetector as well as a nonlinear feedback element in the operational amplifier, has been developed. The output voltage that is proportional to the logarithm of the incident solar intensity permits the direct measurement of atmospheric optical depths in selected spectral bands. Measurements made over Ahmedabad, India, show good agreement, within a few percent, of optical depths derived with a LED as a photodetector in a linear mode and with a LED as both a photodetector and a feedback element in an operational amplifier in log mode. The optical depths are also found to compare well with those obtained simultaneously with a conventional filter photometer [References: 11]
机译：已经开发出一种新的紧凑型发光二极管（LED）太阳光度计，其中LED被用作光谱选择性光电探测器以及运算放大器中的非线性反馈元件。与入射太阳强度的对数成正比的输出电压允许直接测量选定光谱带中的大气光学深度。在印度的艾哈迈达巴德（Ahmedab​​ad）进行的测量显示，在线性模式下，以LED作为光电探测器，在对数模式下，以LED作为光电探测器和运算放大器的反馈元件，在光学深度方面取得了很好的一致性。还发现其光学深度与常规滤光光度计同时获得的光学深度相当[参考文献：11]

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