Translator Disclaimer
12 September 2006 Light recycling in filament light sources
Author Affiliations +
Abstract
The laws of Planck and Kirchhoff are fundamental to a physical model yielding the radiance distribution emitted from a filament light source. The filament is made of a wire coil, or a coiled coil, or even a coiled coiled coil. Some parts of the filaments face other parts. Some light is reflected or absorbed between parts of the filament. This effect is termed light recycling. Light recycling depends on the geometry of the filament, and its material properties. Our model is based on the thermodynamics, geometry, material and electrical properties of a filament lamp. Light recycling is integrated into the model. The model calculates the one-dimensional temperature distribution in the filament by solving the time dependent heat transfer equation. The results of the model are verified with absolute radiance measurements. Parameters are identified in order to increase the accuracy of the values used for material characterization. The source model may be integrated into optical software packages.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ling Fu, Ralf Leutz, and Harald Ries "Light recycling in filament light sources", Proc. SPIE 6338, Nonimaging Optics and Efficient Illumination Systems III, 633802 (12 September 2006); https://doi.org/10.1117/12.679513
PROCEEDINGS
9 PAGES


SHARE
Advertisement
Advertisement
Back to Top