| 摘要 |
PROBLEM TO BE SOLVED: To provide a small light-emitting device capable of controlling an amount of light emission with high accuracy.SOLUTION: The light-emitting device comprises: a light source; an optical member emitting light generated from the light source; a light-receiving part; a substrate on which the light-receiving part is mounted; and a light guide member guiding light generated from the light source to the light-receiving part. The light-emitting device performs light emission control of the light source on the basis of a light reception result of the light-receiving part. The substrate is provided in a front-back direction of the light-emitting device so that a front side end of the substrate is positioned above a back side end of the substrate. The optical member is positioned closer to a front side of the light-emitting device than to the front side end of the substrate, and includes: an emission part emitting light generated from the light source; and a light guide part fixing the light guide member and guiding light generated from the light source to the light guide member. The light guide part protrudes from a lower side of the emission part toward a back side of the light-emitting device so as to be substantially in parallel to the substrate. |
