ILLUMINATION OPTICAL SYSTEM AND PROJECTOR
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United States of America Patent
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Mar 3, 2016
app pub date -
Jun 4, 2013
filing date -
Jun 4, 2013
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Abstract
An illumination optical system is provided that is capable of reducing the saturation or reducing the emission intensity of a phosphor. The illumination optical system (10) includes: excitation light source (12) and phosphor unit (40). The excitation light source (12) includes a plurality of laser light sources (13) arranged in matrix form and emits excitation light realized by mixing the plurality of laser light beams emitted from the plurality of laser light sources (13). The phosphor unit (40) is provided with at least one phosphor area that, in response to the irradiation of the excitation light emitted from excitation light source (12), emits fluorescent light having a wavelength different from the wavelength of the excitation light. The excitation light is condensed on a phosphor unit (40) in a state in which the centers of the plurality of laser light beams emitted from the plurality of laser light source (13) are separated from each other.
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