Noun
English Wikipedia has an article on:confocal microscopyWikipedia
confocal microscopy (uncountable)
An imaging technique in which pinholes are used to eliminate out-of-focus light
See also: total internal reflection fluorescence microscope Neuroscience Confocal main Confocal microscopy uses a scanning point of light and a pinhole to prevent out of focus light from reaching the detector. Source: Internet
Confocal microscopy is, therefore, commonly used where 3D structure is important. Source: Internet