Wavelength conversion element and light source provided with same
AssigneeNippon Electric Glass Co., Ltd.
InventorsMasaaki Kadomi, Yoshimasa Yamaguchi, Takahumi Nishimiya
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Abstract
A light source using a wavelength conversion member is increased in brightness. A wavelength conversion element 11 includes a plurality of wavelength conversion members 12 bundled together, each containing a dispersion medium and phosphor powder dispersed in the dispersion medium.
Claims19
A wavelength conversion element comprising a plurality of wavelength conversion members bundled together, each of the wavelength conversion members containing a dispersion medium and phosphor powder dispersed in the dispersion medium.
A wavelength conversion element comprising:
- a wavelength conversion member made of phosphor powder dispersed in a dispersion medium and having a light entrance surface and a light exit surface opposed to each other in a direction of optical axis;
- and
- at least two first reflective layers formed inside the wavelength conversion member along a plane parallel to the direction of optical axis and dividing the wavelength conversion member into a plurality of sections.
A wavelength conversion element having a light entrance surface and a light exit surface opposed to each other in a first direction, the wavelength conversion element comprising:
- a first portion made of phosphor powder dispersed in a first dispersion medium and constituting a first wavelength conversion portion extending from the light entrance surface to the light exit surface in the first direction;
- and
- a second portion provided to extend from the light entrance surface to the light exit surface in the first direction and in contact with the first portion and containing a second dispersion medium having a different refractive index from the first dispersion medium.
Dependencies are inferred from the claim text.