Patent ID: 9312451
Filing Date: 2016-04-12
CPC Classification: G02B,H01L

Claim Text:
1. A lighting device, comprising: an active light source operable to emit light across a plurality of wavelengths; at least one double-notch reflective filter that substantially passes light of a first set of wavelengths in the plurality of wavelengths and that substantially reflects light of a second set of wavelengths in the plurality of wavelengths, the second set of wavelengths including a first rejection band of about 400 nm to 480 nm and a second rejection band of about 570 nm to 600 nm, the at least one double-notch reflective filter positioned in an optical path between the active light source and an exterior of the lighting device to filter the light before the light reaches the exterior of the lighting device; and a wavelength shifter positioned and oriented to receive at least some of the light of the second set of wavelengths returned from the at least one double-notch reflective filter and in response emit light at wavelengths shifted from respective first rejection band and the second rejection band toward an optical exit of the lighting device.