La. Admin. Code tit. 55 § III-1124

Current through Register Vol. 50, No. 11, November 20, 2024

Section III-1124 - Light Transmittance of Eye Protection Devices

A. Clear. A clear EPD is a device which transmits not less than 85 percent of the incident visible radiation.

B. Tinted. A tinted EPD is a device which transmits less than 85 percent of the incident visible radiation but no less than 20 percent.

1. A tinted EPD shall not impair the wearer's ability to discern color.

2. A tinted EPD shall not be used at night.

C. Luminous Transmittance test

1. Clear EPD. The standard source of all radiant energy used in the measurement of luminous transmittance shall be a projection-type No. T-8 (or other high-powered gas filled tungsten filament incandescent lamp) operated at the color temperature corresponding to CIE Source A.

2. Tinted EPD. The standard source of all radiant energy used in the measurement of luminous transmittance for tinted EPD's shall be CIE Source C.

D. The luminous transmittance of both clear and tinted EPD's shall be determined by one of the following means and by utilizing the applicable light source.

1. Photometrically by an observer having normal color vision, as determined by recognized color vision chart tests such as those employing pseudo-isochromatic plates.

2. With a physical photometer consisting of a thermopile (or other radiometer) and a luminosity solution having a special transmittance curve which coincides closely with the luminous efficiency curve of the average eye.

3. By measuring the spectral transmittance and calculating the luminous transmittance through the use of published data on the spectral radiant energy of CIE Source A for clear EPD's and CIE Source C for tinted EPD's and the relative luminous efficiency of the average eye.

La. Admin. Code tit. 55, § III-1124

Promulgated by the Department of Public Safety and Corrections, Office of State Police, LR 27:67 (January 2001).

AUTHORITY NOTE: Promulgated in accordance with R.S. 32:190.