Optical trigger for lightning stroke shooting

The invention relates to an optical trigger for lightning stroke shooting. The optical trigger comprises a photoelectric conversion circuit, a high-pass filtering amplification circuit and a pulse broadening circuit. The optical trigger disclosed by the invention can be used for effectively detecting optical radiation of a lightning stroke channel and providing a trigger signal for a lightning stroke shooting device and has the characteristics of high accuracy, simple structure, good university, low cost, small size and light weight, convenience for installation, capability of detecting lightning optical signals at day and night, and the like. The optical trigger disclosed by the invention can be widely used as optical triggers of lightning stroke shooting devices for overhead power transmission circuits, buildings or other ground objects and is especially suitable for the lightning stroke shooting device of an 110kV-1000kV overload power transmission line.