Impact of light diffraction on haze and gloss in transmission through supported micro-pillar arrays

In this paper we study light scattering through glass patterned with periodic and random templates of cylinder micro-pillars. We compare integral optical measurements such as haze and gloss to the angle-resolved measurements obtained with two different setups. Optical properties of such samples exhibit non-negligible features related to light diffraction on the periodic arrangement of the micro-pillars and to the light diffraction through individual micro-pillar. Angle-resolved analysis has also proved that presence of numerous diffractive orders in system containing periodic arrangements with lattice constant of the order of tens of microns can result in the underestimation of haze up to the factor of 2.