Patent ID: 7483467

Claim:
A semiconductor laser unit, comprising: a laser emission part including a first semiconductor laser element for emitting a first laser beam having a blue wave range; and a second semiconductor laser element for emitting a second laser beam having a wave range of red-infrared rays, the first and second semiconductor laser element being provided in a same recessed part on a substrate; and a mirror part for reflecting laser beams emitted from said laser emission part, the mirror part being provided on a sidewall face of the recessed part, wherein said mirror part is made up of exposed surfaces of first and second reflection films, the first reflection film being provided for the first laser beam to enter and exhibiting high reflectance for light of blue wave range, and the second reflection film being provided for the second laser beam to enter and exhibiting high reflectance for light of red-infrared wave range; wherein: said reflectance of said first reflection film is higher than said reflectance of said second reflection film for light of blue wave range, and said reflectance of said second reflection film is higher than said reflectance of said first reflection film for light of red-infrared wave range; and said first reflection film for said first laser beam to enter is provided on a portion of said second reflection film, and a portion of said second reflection film on which said first reflection film is not provided is where said second laser beam enters.