Wavelength conversion device and lighting apparatus
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsMasahito YAMANA, Noboru IIZAWA, Shintaro HAYASHI, Yoshiyuki NAKANO
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Abstract
A wavelength conversion device, etc., for laser light according to the present disclosure includes: a first substrate that is light-transmissive; a second substrate that is light-transmissive; and a phosphor layer provided between the first substrate and the second substrate and including a phosphor that converts the wavelength of incident laser light having a predetermined wavelength. The laser light has a laser irradiation power density of at least 0.03 W/mm2, and each of the first substrate and the second substrate has a thermal conductivity higher than the thermal conductivity of the phosphor layer.
Claims18
A wavelength conversion device for laser light, comprising:
- a laser light source that emits laser light having a predetermined wavelength;
- a first substrate that is light-transmissive;
- a second substrate that is light-transmissive;
- and
- a phosphor layer provided between and in surface contact with the first substrate and the second substrate, the phosphor layer converting a wavelength of the laser light from the laser light source which is incident on the phosphor layer, wherein
- the laser light has a laser irradiation power density of at least 0.03 W/mm2, and
- each of the first substrate and the second substrate has a thermal conductivity higher than a thermal conductivity of the phosphor layer.
Dependencies are inferred from the claim text.