OPTICAL FILTER FOR LIGHTING APPARATUS AND LIGHTING APPARATUS PROVIDED WITH THE SAME

摘要

PROBLEM TO BE SOLVED: To make a red and green object to be irradiated look clearer with irradiation light and, further, to make a yellow object to be irradiated look clearer too, in an optical filter for lighting apparatus and a lighting apparatus using the optical filter.;SOLUTION: The optical filter 3 is formed such that the average transmittance for light of wavelength 400 to 475 nm is 70% or more, the average transmittance for light of wavelength 485 to 505 nm is 50% or less, the average transmittance for light of wavelength 515 to 570 nm is 70% or more, and the average transmittance for light of wavelength 580 to 600 nm is 50% or less. According to the constitution, the lighting apparatus 1 using the optical filter 3 makes the red and green object to be irradiated look clearer, and also makes the yellow object to be irradiated look clearer.;COPYRIGHT: (C)2009,JPO&INPIT