Coherent light source device and projector

A projector provided with a coherent light source apparatus and configured to project and display an image with use of the coherent light source apparatus, the coherent light source apparatus comprising:

• a coherent light source;
• a first optical system configured to project light derived from a first light emission region to form a second light emission region, the first light emission region being formed on basis of the coherent light source;
• a light deflection section configured to deflect a bundle of rays in vicinity of the second light emission region, the bundle of rays being related to formation of the second light emission region;
• a second optical system provided downstream of the light deflection section;
• and
• a light mixing section provided downstream of the second optical system, and configured to mix components of angles and positions of rays incident on an incident end, the light mixing section being configured to serve as a light uniformizing section
• the second optical system being configured to form, in distance, an image conjugate to the first light emission region, and form, at the incident end, a third light emission region substantially conjugate to an exit pupil of the first optical system, and
• the light deflection section being configured to continue to perform an operation that causes a direction in which the bundle of rays is deflected to be continuously changed, and thereby causing the third light emission region to move continuously at the incident end.