Light generating apparatus

Patent Granted PROBLEM TO BE SOLVED: To maintain optical paths of a light of two kinds of wavelengths constant, using a simple configuration. SOLUTION: There are provided an exciting laser light source 10 which generates an exciting laser light; a first nonlinear optical crystal 22 which generates the first light by light parametric conversion generated due to receipt of the exciting laser light; a second nonlinear optical crystal 32 which transmits the first light and generates the second light by the light parametric conversion generated, due to receipt of the exciting laser light transmitted through the first nonlinear optical crystal 22; a reflecting mirror 42 which returns the first light and the second light to the second nonlinear optical crystal 32.