| 摘要 |
PROBLEM TO BE SOLVED: To achieve improvement of a heat radiation property while suppressing deterioration of optical performance.SOLUTION: In a light source unit 1, a light distribution control member (lens block 4) is mounted on a heat radiation member 3 via a mounting member 5. Therefore, compared to the case where the light distribution control member (lens block 4) is directly mounted on the heat radiation member 3 only by screwing, there is less risk of distortion occurring in the light distribution control member (lens block 4) by screw fastening torque. Furthermore, as a mounting substrate 21 is pressed against a base part 30 of the heat radiation member 3 by a pressing part 503 of the mounting member 5, heat generated by a solid light emitting element (LED 20) is efficiently transmitted to the heat radiation member 3 from the mounting substrate 21. As a result, the light source unit 1 of this embodiment can achieve improvement of a heat radiation property while suppressing deterioration of optical performance. |
