Title:
OPTICAL ELEMENT, VEHICLE HEADLIGHT, LIGHT SOURCE DEVICE, AND PROJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/189405
Kind Code:
A1
Abstract:
The present invention provides an optical element in which an increase in temperature due to excitation light irradiation is suppressed and a reduction in light emission efficiency is suppressed. This optical element is provided with: a phosphor layer that is excited by excitation light emitted from a light source and emits fluorescence; a translucent thermally conductive layer formed on a surface to be irradiated with the excitation light of the phosphor layer; and a non-translucent thermally conductive layer formed on a surface on the reverse side of the surface to be irradiated with the excitation light of the phosphor layer. The thermal conductivity of the translucent thermally conductive layer is higher than or equal to the thermal conductivity of the phosphor layer.
Inventors:
UEKI TOMOKO
AOMORI SHIGERU
MATSUKIYO HIDETSUGU
AOMORI SHIGERU
MATSUKIYO HIDETSUGU
Application Number:
PCT/JP2020/010256
Publication Date:
September 24, 2020
Filing Date:
March 10, 2020
Export Citation:
Assignee:
SHARP KK (JP)
International Classes:
G03B21/00; G02B5/20; G03B21/14; H01S5/022
Domestic Patent References:
| WO2017130607A1 | 2017-08-03 |
Foreign References:
| JP2018107064A | 2018-07-05 | |||
| JP2016092271A | 2016-05-23 | |||
| JP2016115879A | 2016-06-23 | |||
| JP2016027613A | 2016-02-18 | |||
| JP2011014587A | 2011-01-20 | |||
| JP2016011039A | 2016-01-21 | |||
| JP2017147049A | 2017-08-24 |
Attorney, Agent or Firm:
INOUE Tomoya (JP)
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