Circuit for measuring low illumination intensities

摘要

Illumination intensities of down to approximately 10<-3> lux can be measured with low outlay by connecting a junction field-effect transistor (JFET) in a source-follower circuit as light-sensitive element in a transistor circuit. The invention is suitable for measuring illumination intensities of between 10<-3> lux and 10 lux. <IMAGE>