Light-source device
AssigneeOlympus Corporation
InventorRyo Machida
Life of this patent
Estimating the term…
Abstract
A light-source device includes: two long-wavelength light sources that emit red long-wavelength light beams (LWLs); a broadband light source that emits a green broadband light beam (BL); and a multiplexing portion that multiplexes a wavelength region greater than a first predetermined wavelength λ1 of one of the LWLs having a longer peak wavelength and a wavelength region equal to or less than λ1 of the other LWL having a shorter peak wavelength, and that multiplexes a wavelength region greater than a second predetermined wavelength λ2 of the other LWL and a wavelength region equal to or less than λ2 of the BL, wherein intensities of the LWLs at λ1 are equal to or greater than 10% of the peak intensities thereof and intensities of the other LWL and the BL at λ2 are equal to or greater than 10% of the peak intensities thereof.
Claims4
A light-source device comprising:
- at least two long-wavelength light sources that individually emit long-wavelength light beams that have peak wavelengths, which are different from each other, in a red wavelength region;
- a single broadband light source that emits a broadband light beam that includes a green wavelength region from 500 nm to 580 nm, that has a peak wavelength in a region that is equal to or less than 580 nm, and that has, on a long-wavelength side, a wavelength region that overlaps with a wavelength region of the long-wavelength light beam on a short-wavelength side;
- and
- a multiplexing portion that multiplexes a wavelength region, which is greater than a first predetermined wavelength in the red wavelength region, of one of the long-wavelength light beams having a peak wavelength on a longer-wavelength side, and a wavelength region, which is equal to or less than the first predetermined wavelength, of the other long-wavelength light beam having a peak wavelength on a shorter-wavelength side, and that multiplexes a wavelength region of the other long-wavelength light beam that is greater than a second predetermined wavelength and a wavelength region of the broadband light beam that is equal to or less than the second predetermined wavelength,
- wherein the first predetermined wavelength is a wavelength at which an intensity of the one of the long-wavelength light beams is equal to or greater than 10% of the peak intensity thereof and at which an intensity of the other long-wavelength light beam is equal to or greater than 10% of the peak intensity thereof, and
- wherein the second predetermined wavelength is a wavelength between the peak wavelength of the other long-wavelength light beam and the peak wavelength of the broadband light beam, and is a wavelength at which an intensity of the other long-wavelength light beam is equal to or greater than 10% of the peak intensity thereof, and at which an intensity of the broadband light beam is equal to or greater than 10% of the peak intensity thereof.
Dependencies are inferred from the claim text.