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1. (WO2015046222) LIGHT DIFFUSER AND APPLICATION OF SAME

Pub. No.:    WO/2015/046222    International Application No.:    PCT/JP2014/075238
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Thu Sep 25 01:59:59 CEST 2014
IPC: G02B 5/02
F21S 2/00
F21V 3/00
F21V 3/04
F21Y 101/02
Applicants: SEKISUI PLASTICS CO., LTD.
積水化成品工業株式会社
Inventors: ISHIMORI, Fumitaka
石森 史高
MACHIDA, Kazuki
町田 和毅
Title: LIGHT DIFFUSER AND APPLICATION OF SAME
Abstract:
Provided is a light diffuser that can relax glare of outgoing light from a light source while inhibiting reductions in brightness of the outgoing light caused by disposition of the light diffuser. The light diffuser has transparent particles added into a thermoplastic resin, and the total light transmittance is within a range of 50 - 85%. Wavelength selectivity for the rate of straight forward light propagation found by the following three equations is within a range of 1.5 - 5.0: (wavelength selectivity for straight forward light propagation rate) = (straight forward light propagation rate for 550 nm light)/(straight forward light propagation rate for 450 nm light); (straight forward light propagation rate for 550 nm light) = (straight forward light transmittance for 550 nm light)/(total light transmittance for 550 nm light); (straight forward propagated light rate for 450 nm light) = (straight forward light transmittance for 450 nm light)/(total light transmittance for 450 nm light)