| 摘要 |
PURPOSE: A rain sensor for sensing the inside of a room is provided to receive infrared beam which is reflected from a front glass of a vehicle through an infrared filter and a prism. CONSTITUTION: A rain sensor for sensing the inside of a room comprises a lighting-emitting part(710), a light receiving part(720), a groove(695), a prism(600), and a detection sensor(700). The lighting-emitting part and the light receiving part are installed in order to face the opposite side of a substrate. The prism comprises the groove which accepts the lighting-emitting part and the light receiving part. Plural sides are formed on the prism to refract or reflect the light emitted from the lighting-emitting part in multi-steps. |
