| 摘要 |
PURPOSE:To measure spread angles of light beams in a short time by disposing optical fibers provided with photosensors radially around a light source which is going to be measured of the spread angles of the light beam. CONSTITUTION:The light beams which are emitted from a semiconductor laser 11 and spread in a fan shape are detected at the light incident ends 18a of plural optical fibers 18 provided so as to enclose the laser 11 radially. The light exit ends 18b of the fibers 18 are disposed on a straight line at specified pitches, and the rays emitted from there are detected by photosensors 19 using CCD sensors. The intensity distributions of the rays are displayed on a recorder 22. |
