Patent ID: 8410504
Filing Date: 2013-04-02
Classification: H01L,H05B

Abstract:
1. A light source, comprising: a light emitting diode (LED) chip and a luminescent wavelength converter mounted side by side on a sub-mount, the LED chip emitting excitation light in a first wavelength range, the wavelength converter converting excitation light to converted light in a second wavelength range; a parabolic multi-layer reflector incorporating an absorption layer, the parabolic multi-layer reflector transmitting converted light from the luminescent wavelength converter, the incorporated absorption layer reducing the parabolic multi-layer reflector's transmission of any excitation light impinging on the parabolic multi-layer reflector at substantially oblique angles; and a separate hemispherical absorber positioned around the luminescent wavelength converter so that converted light from the luminescent wavelength converter passes through the separate hemispherical absorber at a normal angle of incidence and excitation light leaking through the parabolic multi-layer reflector passes through the separate hemispherical absorber at an oblique angle.