*Light coagulator* *equipment*, a device for photocoagulation (from the Latin coagulo - I give shape, I thicken, I compact, I glue + photo). A surgical instrument used for thermal coagulation of various tissues. Equipment for photoelectrosurgery. The operating principle is based on the creation of concentrated light sources. Coagulators differ in power, changes made, energy density; according to this criterion, they can be with high or low energy inputs; the passing light waves can be continuous or pulsed. Used