In the research process of concentration ratio of Fresnel lens testing system

a method based on signal conversion of light-electricity-light is proposed.The silicon photocell changes the light signal into electrical signal

and it is collected by the LabVIEW software.Then the electrical signal is converted into light signal according to the light-electricity conversion calibration relationship of photocell.Finally the difference of light signal strength of before and after focusing is used to estimate the everywhere concentration ratio of Fresnel lens.The result shows that the system has simple structure

convenient to operation

good testing effect and broad application prospects in the concentration testing area of solar energy.