| 摘要 |
A light source unit is provided with a light source element; an optical waveguide forming element wherein an optical waveguide is formed; a prism which returns light outputted from the light source element and makes the light travel to a light entering end of the optical waveguide; and a coupling optical system, which is configured on the prism or as an element different from the prism, and couples the light outputted from the light source element with the optical waveguide.
|
