Patent ID: 7397598
Filing Date: 2008-07-08
Classification: G02F,G03F

Abstract:
1. A light source unit that generates light having a predetermined wavelength, said unit comprising: a plurality of light output units that output lights having wavelengths different from said predetermined wavelength; and a wavelength converter that generates light having said predetermined wavelength by wavelength conversion in a plurality of steps which include wavelength conversion using two lights as incident lights whose fundamental waves are severally output from different light output units of said plurality of light output units, wherein at least one unit of said plurality of light output units is a first unit that outputs light of a first wavelength, and at least one unit of said plurality of light output units is a second unit that outputs light of a second wavelength different from light of said first wavelength, wavelength conversion of said wavelength converter includes wavelength conversion in which the m-fold wave (m: natural number) of said light having the first wavelength output from said first unit and the n-fold wave (n: natural number) of said light having the second wavelength output from said second unit enter said converter to generate a sum-frequency of said m-fold wave and said n-fold wave, one unit of said first unit and said second unit is in plurals, and said wavelength conversion of said wavelength converter further includes wavelength conversion that generates a sum-frequency of said generated sum-frequency and light output from the other said one unit, which is not used for generating said sum-frequency.