| 摘要 |
PURPOSE:To enable the optical system of a multibeam projection light source unit to be easily controlled in position. CONSTITUTION:A laser diode 1 equipped with a light emitting chip, an optical system 8 composed of a mirror frame 4 whose outer circumference is threaded 20 and a lens 3 which makes a laser beam emitted from the laser diode 1 parallel rays light, and a bar body 2 where a through-hole 18 is provided as prescribed and the laser diode 1 and the optical system 8 are fixed to the through-hole 18 so as to make their optical axes AX coincident with each other are provided, where the inner circumference of the through-hole 18 is tapped so as enable the mirror frame 4 to be screwed into the through-hole 18. |
