FIELD: information technologies.
SUBSTANCE: method provides for item positioning regarding beam of radiation, irradiation of hidden information with pulse radiation that diverges at an angle in near infrared area of spectrum, and for observation by hidden information signs that luminesce in visible range of wave lengths. At the same time radiation is carried out by means of radiation pulses with duration of 0.04-0.06 seconds with frequency of 3-6 Hertz, and output capacity of radiation is identified on the basis of the following ratio: 
where Pc(t) - capacity of radiation in near infrared area of spectrum measured at the distance of 100 mm from its source.
EFFECT: provides for visualisation with application of radiation sources, which are safe for eyes.
7 cl, 4 dwg
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