Light emitting device, vehicle headlamp, and illumination device
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United States of America Patent
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May 27, 2014
Grant Date -
May 3, 2012
app pub date -
Oct 25, 2011
filing date -
Oct 29, 2010
priority date (Note) -
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Abstract
A headlamp includes an laser element for emitting a laser beam; a light emitting section for emitting fluorescence by receiving the laser beam emitted from the laser element; and a parabolic mirror for reflecting the fluorescence emitted from the light emitting section, the light emitting section being placed so that a focal point of the parabolic mirror and a periphery of the focal point are positioned on the light emitting section, the light emitting section being most strongly excited at a portion corresponding to the focal point, meanwhile, at a portion corresponding to the periphery of the focal point, the light emitting section being excited with intensity being dependent on light intensity distribution of the excitation light on an irradiation surface of the light emitting section.
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