| 摘要 |
<p>This light source unit is provided with: a synthesizing element that synthesizes a first beam and a second beam; a first pinhole section having a first hole from which a beam outputted from the synthesizing element is inputted; a light receiving element, which receives the beam outputted from the synthesizing element via the first hole, and which outputs light reception signals corresponding to a light receiving position of the beam; and a drive means that moves the first pinhole section and/or the light receiving element. In the cases where the beam is radiated to the outside of a predetermined range of the light receiving element, the drive means moves the first pinhole section and/or the light receiving element such that the beam is radiated within the predetermined range.</p> |
