Light source device

A light source device comprising:

• first and second semiconductor light sources configured to emit light;
• a condenser lens configured to condense the light;
• and
• a light guide having an incident surface, an emission surface and at least one flat reflecting inner surface, the light guide configured to guide the light from the incident surface to the emission surface while reflecting the light on the at least one flat reflecting inner surface,
• wherein the condenser lens is configured such that the light from the first semiconductor light source, after being incident on the incident surface, is perpendicularly incident to the at least one flat reflecting inner surface in a cross-sectional view of the light guide, the cross-sectional view being orthogonal to a central axis direction of the light guide,
• the first and second semiconductor light sources are arranged on a circumference of a first circle.