FIELD: physics. SUBSTANCE: invention relates to the ionizing radiation dosimetry. Disclosed is a method of producing thin-layer ionizing radiation detectors for skin and eye dosimetry, using a standard detector Al2O3:C based on anion-defective corundum, wherein the detector is heated to temperature of 1,120–1,220 K, held at this temperature for 10–40 minutes with simultaneous irradiation in a heated state of the integral light flux from the mercury gas-discharge source with subsequent heating in the dark of the surface layer of the detector with thickness of 10–13 mcm to temperature of 1,280–1,370 K , using, for example, focused emission CO2-laser power of 12 W by scanning with a beam with diameter of 10–15 mcm of the detector surface at rate of 0.1 m/s. EFFECT: high reliability, accuracy and accuracy of assessing radiation doses of the eye lens, skin of open body areas.