SPIE non-imaging optics best paper award to Jing Gong

The paper reports new developments in micro structured window glazing, in which embedded optical microstructures are used to reduce energy consumption in cooling, improving the daylighting and visual comfort inside buildings.

Abstract:

A novel glazing system consisting of a polymer layer with embedded micro compound parabolic concentrators (CPCs), which is attached to a glass pane of glazing, is proposed. It aims to reduce the energy consumption due to cooling in buildings, provide daylighting, and maintain the transparent view. In the present work, the daylighting system is modelled for ray-tracing simulation, and the angular-dependent transmittance at the azimuth angle of 0° is calculated. Structural characterization is conducted using optical microscope for the microstructures which serve as support for the reflective thin films of a micro CPC. Based on self-shading effect of a microstructure, facet-selective deposition of Aluminum with various thickness has been achieved by physical vapor deposition. Spectral measurement has been used to characterize the optical properties of the Aluminum thin films. Diffraction effect with respect to the thin film thickness on the transmission of linear micro-CPCs arrays is investigated by a monochromatic laser beam and visual observation. The results of the present work provides the reference for the optimization of the transmittance of the deposited thin film for a micro CPC, in order to achieve the desired optical property.

This research was conducted in the LESO-PB Nanotechnical Lab under the supervision of Dr Andreas Schueler.

Contact

Jing Gong Laboratoire d'énergie solaire et de physique du bâtiment LESO-PB
[email protected]
+41 21 693 5557

Andreas Schueler Laboratoire d'énergie solaire et de physique du bâtiment LESO-PB
[email protected]
+41 21 693 4544