Light source apparatus and projector

A light source apparatus comprising:

• a substrate having a first surface;
• a frame provided at a side facing the first surface;
• a lid with which the frame is provided;
• a light emitter that is accommodated in an accommodation space formed by the substrate, the frame, and the lid and provided at the side facing the first surface of the substrate;
• a wavelength converter that is provided at the substrate, is accommodated in the accommodation space, converts first light emitted from the light emitter into second light having a wavelength different from a wavelength of the first light, and outputs the second light;
• a first optical film that is provided in a light path between the light emitter and the wavelength converter, transmits one of the first light and the second light, and reflects another one of the first light and the second light;
• and
• an optical element that is provided in the light path between the light emitter and the wavelength converter and has a second surface,
• wherein the light emitter emits the first light in such a way that a chief ray of the first light travels along the first surface, and
• the first optical film is formed at the second surface of the optical element, transmits the first light emitted from the light emitter, and reflects the second light outputted from the wavelength converter.