The paper presents tow kinds of new optical methods for measuring electric power. They are respectively called indirect optical method for measuring electric power and direct optical method for measuring electric power. The principles and signal processing technique of the two kinds of methods are discussed comprehensively and systematically. The study shows that the two kinds of methods can be used to measure the electric power when the current is large and/or the voltage is high.
"Optical method for measuring electric power", Proc. SPIE 2899, Automated Optical Inspection for Industry, (3 October 1996); doi: 10.1117/12.253092; https://doi.org/10.1117/12.253092