| 摘要 |
<p>Disclosed is a light emitting device, which does not generate a loss of the output light intensity of a light source and can be stably controlled. The light emitting device is provided with: the light source, which has a light radiating section on a predetermined surface, and radiates light from the light radiating section; a light receiving element which is disposed such that the element can receive light leaked from surfaces other than the predetermined surface; and a control unit which controls the light radiated from the light source, on the basis of signals obtained by receiving the leaked light by means of the light receiving element.</p> |
