Title:
波長変換素子、光源装置および画像投射装置
Document Type and Number:
Japanese Patent JP6723939
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a wavelength conversion element with improved fluorescent light emission efficiency.SOLUTION: A wavelength conversion element 102 generates fluorescent light by converting wavelength of a portion of excitation light in order to generate composite light of the fluorescent light and non-converted light having the same wavelength as the excitation light. The wavelength conversion element comprises a phosphor 1, a binder 3 in contact with the phosphor, and a plurality of diffuser particles 2 contained in the binder. A minimum diameter of the diffuser particles shall be 1/4 or more of and 4 times or less of the wavelength of the fluorescent light. A proportion of volume of the diffuser particles to total volume of the binder and the diffuser particles shall be 25% or more and less than 60%.SELECTED DRAWING: Figure 2
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Inventors:
Minoru Okoba
Yuya Kurata
Ryota Kadowaki
Yuya Kurata
Ryota Kadowaki
Application Number:
JP2017020127A
Publication Date:
July 15, 2020
Filing Date:
February 07, 2017
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B5/20; C09K11/02; G02B5/02; G03B21/00; G03B21/14; H01L33/50; H01S5/02
Domestic Patent References:
| JP2012108435A |
Foreign References:
| WO2014006987A1 | ||||
| WO2016121855A1 |
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsushi Mizumoto
Hirayama Tomoya
Atsushi Mizumoto
Hirayama Tomoya