| 摘要 |
PROBLEM TO BE SOLVED: To provide a light emitting module where the travel of unnecessary light generated by the reflection of a laser beam emitted from a laser diode on the inner wall face of a light guide and the laser beam realizing minute detection can be formed. SOLUTION: The light emitting module is provided with a frame 51 having the light guide 52 which is formed by penetrating the module from a rear side to a surface side; the laser diode 1 arranged on one end side of the light guide 52; a condensing lens 2 which is arranged on the other end side of the light guide 52, condenses the laser beam emitted from the laser diode, and forms the laser beam; and a pin hole board which is arranged close to the opposite side of the laser diode with respect to the condensing lens, and in which a pin hole 31 for narrowing the laser beam is formed. The light guide 52 is provided with a dimming means for inhibiting the travel of the laser beam reflected on the inner wall face and adjusting the laser beam passing through the pin hole 31. |
