Projector

A projector comprising:

• a first light source that emits light including visible light;
• a second light source that emits light including infrared light;
• a light separating unit that separates the light from at least the first light source of the first light source and the second light source into lights in plural wavelength regions different from one another;
• at least one light modulation element for visible light that modulates visible light separated by the light separating unit;
• at least one light modulation element for infrared light that modulates infrared light from the second light source;
• a light combining unit that combines the modulated light modulated by the light modulation element for visible light and the modulated light modulated by the light modulation element for infrared light into one to form combined light;
• and
• a projecting unit that projects and displays the combined light combined by the light combining unit on a projection surface, wherein
• the projector superimposes and displays a visible light image formed by the light modulation element for visible light and an infrared image formed by the light modulation element for infrared light on the identical projection surface.

A projector comprising:

• plural light sources having light emission wavelength regions different from one another;
• at least one light modulation element for visible light that modulates visible light emitted from each of the plural light sources;
• at least one light modulation element for infrared light that modulates one kind of infrared light or at least two kinds of infrared light in wavelength regions different from each other emitted from each of the plural light sources;
• a light combining unit that combines the modulated light modulated by the light modulation element for visible light and the modulated light modulated by the light modulation element for infrared light into one to form combined light;
• and
• a projecting unit that projects and displays the combined light combined by the light combining unit on a projection surface, wherein
• the projector superimposes and displays a visible light image formed by the light modulation element for visible light and an infrared image formed by the light modulation element for infrared light on the identical projection surface.