Open AccessModified blackbody radiation spectrum of a selective emitter with application to incandescent light source design
Author(s) -
Takahiro Matsumoto,
Makoto Tomita
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.00a192
Subject(s) - incandescent light bulb , black body radiation , emissivity , optics , common emitter , infrared , radiation , materials science , optoelectronics , visible spectrum , wavelength , thermal radiation , physics , thermodynamics
Using a selective emitter with high emissivity in the visible wavelength region and low emissivity in the infrared wavelength region, we reduced the infrared contribution to the blackbody radiation spectrum and shifted the peak emission to shorter wavelengths. We made precise measurements of thermal radiation loss. The conversion efficiency from input electric power to visible light radiation was quantitatively evaluated with high accuracy. Using the proposed selective emitter, the conversion efficiencies in excess of 95% could be produced. Our conclusions pave the way for the design of incandescent lamps with luminous efficiencies exceeding 400 lm/W.