| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an optical module in which the quantity of light of a radiated luminous flux can be adjusted precisely even during the scanning of a scanning line and which is small and of a simple structure, and to provide a light source device. SOLUTION: The optical module is provided with waveguides 25, 26, 27 wherein beams of incident light which are radiated from light sources 21, 22, 23 and which are incident from incident faces 25a 26a 27a are guided to outgoing faces 25b, 26b, 27b. The optical module is provided with a grating coupler 40 which is composed of a grating formed so as to be adjacent to the waveguides 25, 26, 27, and which branches the beams of incident light from the waveguides 25, 26, 27 so as to be radiated to a prescribed direction. The optical module is provided with light receiving elements 41, 42, 43 which receive the beams of light branched by the grating coupler 40 and which detect quantities of the beams of incident lights On the basis of the quantities of the beams of incident light detected by the light receiving elements 41, 42, 43, outputs of the light sources 21, 22, 23 are made variable.</p> |
