Devitrite-Based Optical Diffusers

Abstract

Devitrite is a novel material produced by heat treatment of commercial soda-lime-silica glass. It consists of fans of needle-like crystals which can extend up to several millimeters and have interspacings of up to a few hundred nanometers. To date, only the material properties of devitrite have been reported, and there has been a distinct lack of research on using it for optical applications. In this study, we demonstrate that randomly oriented fans of devitrite crystals can act as highly efficient diffusers for visible light. Devitrite crystals produce phase modulation of light because of their relatively high anisotropy. The nanoscale spacings between these needles enable light to be diffused to large scattering angles. Experimentally measured results suggest that light diffusion patterns with beam widths of up to 120° are produced. Since devitrite is an inexpensive material to produce, it has the potential to be used in a variety of commercial applications.

Optical diffusers with enhanced properties based on novel polysiloxane@CeO2@PMMA fillers

“…Fig. 29 Compared to common spherical particles, the core-shell structure can achieve a better light-diffusing effect due to multiscattering. 2(c).…”

“…Haider Butt et al 29 reported a devitritebased optical diffuser with good diffusing effect. Current research on optical diffusers mainly focuses on exploring and studying anisotropic materials.…”

Nanosecond pulsed laser texturing of optical diffusers

“…4,8 Most diffusers consist of surfacerelief structures including microlenses, pyramids, and textured surfaces due to the simplicity and time required for their fabrication. [9][10][11][12][13] Optical diffusers have been fabricated employing a range of coating processes. 5,14 However, nanosecond pulsed laser patterning of optical diffusers have not been studied.…”

First investigations on the quaternary system Na2O-K2O-CaO-SiO2: synthesis and crystal structure of the mixed alkali calcium silicate K1.08Na0.92Ca6Si4O15

“…However, the crystalline counterparts have also found quite a number of applications in Materials science. Na 2 CaSiO 4 or Na 2 Ca 2 Si 3 O 9 (combeite), for example, have been reported as major phases in bioactive glass ceramics or as host materials for inorganic phosphors, whereas overlapping fans of needles of Na 2 Ca 3 Si 6 O 16 (devitrite) crystals have been successfully developed for manufacturing of low-cost optical diffusers (Kaygili 2014;Fujikura et al 2012;Liu et al 2014;Butt et al 2014). The corresponding potassium system, on the other hand, has seen a revival of interest only recently.…”