Investigation of photobiological safety of blue light of LED image projector of household use

Abstract
 Light emitted in the wavelength range of 400–500 nm causes a very significant photochemical effect on retina. At certain doses blue light energy can cause damage to retina, so study safety projectors used domestic conditions is an urgent task. The aim this work photobiological image with emitting diodes. paper analyzes requirements for tube systems and methods assessing danger that use LED sources. information provided equipment measurement spectroradiometric photometric parameters beams projectors, as well features radiance irradiance lamp which lens optics used.
 results research levels intended household are presented. It shown at distance 1 m from projector (the level normalized), investigated type belongs risk group RG1 (insignificant risk). When reduced 0.5 0.2 m, increases RG2 (medium risk).
 everyday life, educational institutions other analyzed. In particular, collimator should not exceed RG1, it recommended put additional label indicating mark user manual.
 Conclusions made compliance studied low-power light, established by international standard IEC 62471-5 (Photobiological Safety Lamps Lamp Systems – Part 5 Image Projectors).