Using Photoelectric-Diode Volt-Ampere Characteristic to Detect Visibility

Abstract

Based on the linear relationship between light illumination and output current of photoelectric-diode under reverse bias voltage, several photoelectric circuit was design. According to Bouguer-Lambert's law and Koschmic principle, the relationship between output voltage and illumination is changed into a quantitative relationship between output voltage and visibility. Using the relation, We can get the relationship between light transmittance and output voltage, and use the photoelectric circuit to detect visibility. Through the experiment, we find the results matched our theory. With the aid of these relationships, We can measure instant visibility.