Time-resolved Kerr microscopy
Time-resolved wide field Kerr microscopy is a well suitable tool to image dynamic magnetization processes. Images are taken at exposure times much smaller than the period of the exciting magnetic field. By changing the delay of the image exposure, the magnetic domain structure can be displayed at any point of the magnetization process. Because of the short exposure time, the intensity of several thousands or even millions of single images has to be accumulated. Therefore, only reproducible magnetization processes can be observed. Two routes of stroboscopic imaging are possible: a system based on a gated video camera with constant light source, and a system with a pulsed laser light source.