Light source device and image projection device

摘要

Problem to be solved: to increase the utilization efficiency of light in the light source apparatus.The light source apparatus includes a light source, an optical element to be irradiated with light from the light source, and a microstructured element 103 disposed between the light source and the optical element and having a fine structural surface 1032 acting on light from the light source. The microstructured element 103 is disposed so as to face the optical element side.Diagram