Wide-field multiphoton microscopy

Wide-field multiphoton microscopy refers to an optical non-linear imaging technique tailored for ultrafast imaging in which a large area of the object is illuminated and imaged without the need for scanning. High intensities are required to induce non-linear optical processes such as two-photon fluorescence or second harmonic generation.

Source: Wikipedia — Wide-field multiphoton microscopy (CC BY-SA 4.0)