Title:
FLUORESCENT LIGHT SOURCE DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/101023
Kind Code:
A1
Abstract:
Provided is a fluorescent light source device that includes an excitation light source and a fluorescent body, and that is capable of generating light that exhibits excellent color-rendering properties. The fluorescent light source device comprises: an excitation light source that emits excitation light in the blue color region; a fluorescent plate that includes a fluorescent body in which Ce has been activated, and generates long-wavelength fluorescence by receiving the excitation light; a collimating optical system that at least reduces the divergence angle of the fluorescence; and a notch filter through which light that is emitted from the collimating optical system passes. The notch filter has a light incidence surface that is oriented substantially orthogonal to the optical axis of the principal rays of the light emitted from the collimating optical system, and a cut wavelength region in which the center wavelength thereof is in a range of 553–575 nm, and the half value width is in a range of 17–41 nm.
Inventors:
INOUE MASAKI (JP)
KABUKI KIYOYUKI (JP)
KABUKI KIYOYUKI (JP)
Application Number:
PCT/JP2023/035061
Publication Date:
May 16, 2024
Filing Date:
September 27, 2023
Export Citation:
Assignee:
USHIO ELECTRIC INC (JP)
International Classes:
F21S2/00; C09K11/79; F21V9/30; F21V9/35; G02B5/20; G02B5/22; F21Y115/10; F21Y115/30
Foreign References:
| JP2014186115A | 2014-10-02 | |||
| JP2018040914A | 2018-03-15 |
Attorney, Agent or Firm:
KIMURA Masayoshi (JP)
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