Illumination device and image display apparatus
First Claim
1. An illumination device comprising:
- an excitation light source configured to emit excitation light having a first wavelength range; and
a single rotating fluorescent portion configured to includea fluorescent substance that, responsive to being irradiated with the excitation light, emits emission light having a second wavelength range which is different from the first wavelength range, anda reflective portion that is provided at a side of the fluorescent substance, which is opposite to an excitation light incidence side, and reflects the emission light emitted from the fluorescent substance,wherein the fluorescent substance is provided continuously along an entirety of a circumference of the reflective portion.
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Accused Products
Abstract
An illumination device includes: an excitation light source that emits excitation light having a first wavelength; and a fluorescent member that includes a fluorescent substance that, when it is irradiated with the excitation light, emits light having a second wavelength longer than the first wavelength, transmits a part of the excitation light and reflects another part of the excitation light, and a first reflective film provided at a side of the fluorescent substance, which is opposite to an excitation light incidence side, the fluorescent member emitting multiplexed light including an excitation light component reflected from the fluorescent substance and the first reflective film and a light component emitted from the fluorescent substance.
18 Citations
14 Claims
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1. An illumination device comprising:
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an excitation light source configured to emit excitation light having a first wavelength range; and a single rotating fluorescent portion configured to include a fluorescent substance that, responsive to being irradiated with the excitation light, emits emission light having a second wavelength range which is different from the first wavelength range, and a reflective portion that is provided at a side of the fluorescent substance, which is opposite to an excitation light incidence side, and reflects the emission light emitted from the fluorescent substance, wherein the fluorescent substance is provided continuously along an entirety of a circumference of the reflective portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An image display apparatus comprising:
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a light source device section; and an image projection section configured to generate a predetermined image light by using light emitted from the light source device section and project the generated image light to the outside, wherein the light source device section includes; an excitation light source configured to emit excitation light having a first wavelength range, and a single rotating fluorescent portion configured to include a fluorescent substance that, responsive to being irradiated with the excitation light, emits emission light having a second wavelength range which is different from the first wavelength range, and a reflective portion that is provided at a side of the fluorescent substance, which is opposite to an excitation light incidence side, and reflects the emission light emitted from the fluorescent substance, wherein the fluorescent substance is provided continuously along an entirety of a circumference of the reflective portion.
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Specification