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posted Jun 8, 2015, 5:46 PM by iwasaki@parc.osaka-u.ac.jp   [ updated Feb 21, 2016, 5:28 PM by 田中千秋 ]
An article by prof. Takahara on Eco-Bulbwas published in Applied Physics (Oyo Butsuri), June 2015. Holes in the filament surface of a bulb serves to improve the conversion efficiency to visible light, by cutting off the infrared radiations of long wavelength on the principle of microwave waveguide. The photonics center’s “start-up and commercialization projects” paved a way for the productization
of the Eco Bulb. Click here for the article file (in Japanese).