Light source unit and projector

A light source unit, comprising:

• a light source device comprising a first light source and a second light source that are held by a holding member, wherein light emission directions of the first and second light source devices are substantially parallel to each other, and the first light source and the second light source each emit light in a predetermined polarizing direction;
• a first reflection device on which the light from the first light source is incident;
• a second reflection device on which reflection light from the first reflection device and the light from the second light source are incident;
• a light source control device which selectively drives the first light source and the second light source in response to an input signal;
• a third reflection device which shifts the reflection light of the first reflection device from the optical path for separation and transmits the reflection light of the second reflection device;
• and
• a luminescent material portion on which the reflection light of the second reflection device that has passed through the third reflection device is incident,
• wherein the first reflection device is formed so as to reflect light in the polarizing direction in light that is incident thereon from the first light source,
• wherein the second reflection device transmits the reflection light reflected by the first reflection device, the reflection light being polarized in the predetermined polarizing direction,
• wherein the second reflection device reflects light in the polarizing direction in light that is incident thereon from the second light source, and
• wherein the reflection light of the first reflection device and reflection light reflected by the second reflection device are on a same optical path.

A light source unit, comprising:

• a light source device comprising a first light source and a second light source that are held by a holding member, wherein light emission directions of the first and second light source devices are substantially parallel to each other, and the first light source and the second light source each emit light in a predetermined polarizing direction;
• a first reflection device on which the light from the first light source is incident;
• a second reflection device on which reflection light from the first reflection device and the light from the second light source are incident;
• a light source control device which selectively drives the first light source and the second light source in response to an input signal;
• a third reflection device configured to reflect or transmit light that has passed through the second reflection device and transmit or reflect light reflected by the second reflection device;
• a luminescent device configured to emit luminescent light;
• and
• a fourth reflection device configured to transmit or reflect light having passed through or been reflected by the third reflection device onto the luminescent device as excitation light and reflect or transmit the luminescent light from the luminescent device,
• wherein the first reflection device is formed so as to reflect light in the polarizing direction in light that is incident thereon from the first light source, and
• wherein the second reflection device transmits the reflection light reflected by the first reflection device, the reflection light being polarized in the predetermined polarizing direction.