Projector and control method of projector

A projector which modulates light emitted from a solid light source by a first optical modulator and projects an image, the projector comprising:

• a division unit which divides first light beams forming the image;
• a diffusion plate which diffuses one of the first light beams divided by the division unit, such that the first light beams incident on the division unit proceed to either the diffusion plate or the first optical modulator, wherein the first optical modulator modulates one of the first light beams divided by the division unit;
• a first sensor which receives the light beams diffused by the diffusion plate;
• a second sensor which receives a second light beams having a full width at the half maximum of a spectrum different from the first light beams and forming the image;
• and
• an adjustment unit which adjusts a ratio of the first light beams to the second light beams according to a detection result of the first sensor and a detection result of the second sensor, wherein:
• a diffusion plate which diffuses the second light beams is not included between (I) an optical member which guides the second light beams to the second sensor and (II) the second sensor.