Misją Instytutu jest dzialalność naukowo-badawcza prowadząca do nowych rozwiązań technicznych i organizacyjnych użytecznych w kształtowaniu warunków pracy zgodnych z zasadami bezpieczeństwa pracy i ergonomii oraz ustalanie podstaw naukowych do właściwego ukierunkowywania polityki społeczno-ekonomicznej państwa w tym zakresie.
Assessment of the thermal hazard for the eye's retina with VIS and IRA radiation in the range 380 - 1400 nm
Program supporting assessment of the thermal hazard for the eye's retina with VIS and IRA radiation in the range 380 - 1400 nm. In the case when the radiation source is a strong light stimulus, i.e. the source luminance L> = 10000 cd/m2, the risk of VIS and IRA radiation in the range 380 - 1400 nm is assessed. However, when the radiation source is a weak light stimulus, i.e. the luminous luminance of the source L <10,000 cd/m2, the risk of IRA radiation in the range of 780 - 1400 nm is assessed.
The initial values for hazard assessment are:
α – angular suptense of the source (marked in the program as alpha), in [mrad],
L – source luminance, in [cd/m2],
LR – effective radiance of the source (marked as L_R), w [W/m2sr],
ti – jednorazowy czas ekspozycji w ciągu zmiany roboczej (marked as t_i), w [s].
Occupational risk assessment is performed in relation to the applicable admissible values, specified in the Regulation of the Minister of Family, Labor and Social Policy of 12 June 2018 on the highest allowable concentrations and intensities of factors harmful to health in the work environment (Journal of Laws 2018 item 1286). According to the ordinance, the value used to assess the thermal hazard of the eye's retina with VIS and IRA radiance is the effective radiance of the source LR, w [W/m2sr]. For this quantity, the maximum exposure value (MDE) is determined as a function of source luminance, one-time exposure time and angular subtense.
Based on the entered values, the program calculates the value of MDE, MDE times, k, and evaluates the occupational risk resulting from these values. In addition, the program determines the value of the permissible one-time exposure time, tp (marked as t_p), in [s]. Detailed principles of occupational risk assessment are presented in the chapter "Principles of assesment".
Color marking in occupational risk assessment:
green - low risk,
yellow - medium risk,
red - high risk.
Using the program:
Using the switch available in the program, select the type of radiation source (weak / strong), depending on the source luminance. Then, in the appropriate fields of the program, the value of the effective radiance of the source L_R, angular subtense alpha and one-time exposure time t_i should be provided (depending on the selected type of source). The entered values should be confirmed with the Enter key.
