  The transmission of light through low coverage regular and random arrays of
glass supported silica micropillars of diameters 10 to 40 \micro\meter and
height 10 \micro\meter is studied experimentally. Angle-resolved measurements
of the transmitted intensity are performed at visible wavelengths by either a
goniospectrophotometer or a multimodal imaging (Mueller) polarimetric
microscope. It is demonstrated that for the regular arrays, the angle-resolved
measurements are capable of resolving many of the densely packed diffraction
orders that are expected for periodic structures of lattice constants 20 to 80
\micro\meter, but they also display features that are due to the scattering and
guiding of light in individual micropillars or in the supporting glass slides.
These latter features are also found in angle-resolved measurements on random
arrays of micropillars of the same surface coverage. Finally we perform a
comparison of direct measurements of haze in transmission for our patterned
glass samples with what can be calculated from the angle-resolved transmitted
intensity measurements. Good agreement between the two types of results are
found which testifies to the accuracy of the angle-resolved measurements that
we report.

Optics