Читать книгу Patty's Industrial Hygiene, Physical and Biological Agents - Группа авторов - Страница 116

The ACGIH TLV (20) for protection against thermal injury to the cornea or lens from IR‐A and IR‐B radiation is

(17)

for t less than 1000 seconds, where the spectral irradiance E_λ at the eye is expressed in W cm⁻² nm⁻¹. For exposure periods greater than 1000 seconds, the total unweighted irradiance due to IR‐A and IR‐B radiation should not exceed 0.01 W cm⁻². The ICNIRP exposure limit for protecting thermal injury to the cornea and lens is the same as the TLV but weights the spectral radiance between 780 and 1000 nm by a factor of 0.3 and does not include wavelengths shorter than 780 nm (19).