Original scientific paper
The measurement of optical denisty of glasses for preventive goggles
Fedor Valić
; Institut za higijenu rada Zagreb
Abstract
Methods arc described for the measurement of transmission of protective glasses in the ultraviolet and the visible spectral region. The transmission measurements were performed with a Pulfrich photometer, a König-Martens and a Beckman spectrophotometer. Zeiss universal spectrograph was also used. Measurements with Zeiss spectrograph are discussed in detail. If necessary the radiation intensity was diminished by means of a calibrated set of metal wire screens. The transmission or very dense glasses was calculated using the reciprocity law and the Schwarzschild relation.
Keywords
Hrčak ID:
187425
URI
Publication date:
10.12.1952.
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