Light source device, lighting apparatus, and vehicle lamp device
AssigneeMitsubishi Electric Corporation
InventorsMasatoshi Nishimura, Akihiro Yamada, Jun Kondo
Life of this patent
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Abstract
A light source device includes a light source, a wavelength conversion member, and a retroreflective optical member. The light source emits excitation light. The wavelength conversion member includes a first region irradiated with the excitation light and radiates, from the first region, converted light having a wavelength different from that of the excitation light. The retroreflective optical member reflects the converted light toward the first region. The first region is a region that is a part of the wavelength conversion member.
Claims20
A light source device comprising:
- a light source to emit excitation light;
- a wavelength conversion member including a first region which is irradiated with the excitation light, converted light having a wavelength different from a wavelength of the excitation light being emitted from the first region;
- and
- a retroreflective optical member to reflect the converted light to the first region, wherein
- the first region is a region that is a part of the wavelength conversion member,
- the retroreflective optical member includes a spherical lens that retroreflects the converted light and a fixing member holding the spherical lens,
- the fixing member has a concave part for holding the spherical lens,
- the fixing member is formed to surround the converted light radiated from the wavelength conversion member toward the light source, and
- the spherical lens is disposed on a surface of the fixing member formed to surround the converted light.
A light source device comprising:
- a light source to emit excitation light;
- a wavelength conversion member including a first region which is irradiated with the excitation light, converted light having a wavelength different from a wavelength of the excitation light being emitted from the first region;
- and
- a retroreflective optical member to reflect the converted light to the first region, wherein
- the first region is a region that is a part of the wavelength conversion member,
- the retroreflective optical member has a concave surface that retroreflects the converted light emitted from the wavelength conversion member and traveling toward the concave surface,
- the retroreflective optical member includes a transmission part that allows the excitation light to pass through, and
- the concave surface is formed on the transmission part.
A light source device comprising:
- a light source to emit excitation light;
- a wavelength conversion member including a first region which is irradiated with the excitation light, converted light having a wavelength different from a wavelength of the excitation light being emitted from the first region;
- and
- a retroreflective optical member to reflect the converted light to the first region, wherein
- the first region is a region that is a part of the wavelength conversion member,
- the retroreflective optical member has a concave surface that retroreflects the converted light,
- the retroreflective optical member includes a transmission part that allows the excitation light to pass through,
- the retroreflective optical member is disposed on an optical path and between the light source and the wavelength conversion member, and
- the concave surface is formed on the transmission part.
Dependencies are inferred from the claim text.