Title:
LIGHT SOURCE DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/022517
Kind Code:
A1
Abstract:
Provided is a light source device that can emit monochromatic light, for example, monochromatic light similar to the bright line spectrum of a low-pressure sodium lamp. A light source device 10 is configured so as to be provided with: a low-pressure light source 12 that comprises a discharge tube including mercury; a first optical filter 13 and a second optical filter 14 that are sequentially arranged at the front of the light source; and a light diffusion plate, wherein the first optical filter 13 has optical characteristics of cutting off a spectral component of a wavelength region shorter than one peak wavelength of light emitted from the light source, the second optical filter 14 has optical characteristics of cutting off a spectral component of a wavelength region longer than the peak wavelength of the light emitted from the light source, and the light transmitted through the first optical filter 13 and the second optical filter 14 is diffused by the light diffusion plate.
Inventors:
KURIHARA KIMISATO
Application Number:
PCT/JP2019/029559
Publication Date:
January 30, 2020
Filing Date:
July 22, 2019
Export Citation:
Assignee:
KK KURIHARA KOGYO (JP)
International Classes:
G01N21/84; F21S2/00; F21V9/08; F21V9/20; G01M11/00; H01J61/20; H01J61/40; F21Y101/00
Foreign References:
| JPH09218017A | 1997-08-19 | |||
| JP2006275704A | 2006-10-12 | |||
| JP2011043415A | 2011-03-03 | |||
| JP2017198491A | 2017-11-02 | |||
| US20080024869A1 | 2008-01-31 |
Download PDF: