| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical unit that can improve light incidence efficiency from a plurality of light sources to a member on which light is condensed.SOLUTION: Each of semiconductor lasers 20 is provided such that an optical axis L1 of emitted light is inclined with respect to a normal line Z of an optical fiber incident surface 11. A prism 30A is formed so that an optical fiber incident angle &thetas;2 formed between an optical axis L2 of emitted light from a light emission surface 32 and the normal line Z of the optical fiber incident surface 11 is smaller than an incident light inclination angle &thetas;1 formed between the optical axis L1 of light emitted from the semiconductor laser 20 to a light incident surface 31A and the normal line Z of the optical fiber incident surface 11. |
