Читать книгу Patty's Industrial Hygiene, Physical and Biological Agents - Группа авторов - Страница 112

The ocular media are effectively transparent to visible radiation and transmit some IR‐A and UV‐A radiation as well. Transmitted optical radiation is focused by the lens onto the retina to form a retinal image. The irradiance received at the retinal image of an optical source is proportional to the radiance of the source. Photochemical or thermal damage may result from excessive irradiance at the retinal image.

ICNIRP (19) and ACGIH (20) have established guidelines for protection against retinal hazards. The relevant spectral weighting functions used by ACGIH are generally harmonized with those recommended by ICNIRP, but the exposure limits recommended by ICNIRP and ACGIH differ in some cases.

FIGURE 8 Comparison of the ACGIH TLV for narrowband radiation (15) with the erythemal effective radiant exposure (J m⁻²) equivalent to 1 SED (17) at wavelength λ.