Empirical measurements of specular

Empirical measurements of specular glare reduction on a standard glass surface
Percent specular glare reduction of a lamp’s reflection on a standard glass surface may be calculated from light meter measurements with and without the polarizing filter covering the lamp. If the theory predicts glare reduction from measurements, the theory may be used to predict situations of optimized glare reduction in the workplace.
As demonstrated in Fig. 6, empirical measurements of image luminance and lamp illuminance were taken on a desk in a typical cubicle arrangement with an under- shelf T-8 fluorescent luminaire. The luminaire had a 901 metallic reflector and no diffuser lens. The polarizing filter was a polycarbonate tube, lined on the inside with an efficient multi-layer reflective polarizer film (Weber et al., 2000), mounted on and completely covering the T-8 fluorescent lamp.