Light source device, lighting apparatus, and projector
AssigneeSeiko Epson Corporation
InventorKoichi Akiyama
Life of this patent
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Abstract
A light source device includes a light source, a fluorescent layer, a diffusive reflector, a first lens unit, a second lens unit, and a light separating and synthesizing unit. The light separating and synthesizing unit divides light coming from the light source into a first light and a second light. The first light passes through the first lens unit to enter the fluorescent layer. The second light passes through the second lens unit to enter the diffusive reflector. The size of a spot of the second light on the diffusive reflector is greater than the size of a spot, of the first light on the fluorescent body layer.
Claims15
A light source device comprising:
- a light source;
- a light separating and synthesizing unit that separates a light beam flux from the light source into a first light beam flux and a second light beam flux;
- a fluorescent body layer on which the first light beam flux is incident;
- a diffusive reflector on which the second light beam flux is incident;
- a first lens unit that is provided in an optical path of the first light beam flux between the light separating and synthesizing unit and the fluorescent body layer;
- and
- a second lens unit that is provided in an optical path of the second light beam flux between the light separating and synthesizing unit and the diffusive reflector,
- wherein fluorescent light emitted from the fluorescent body layer and diffused light emitted from the diffusive reflector are synthesized by the light separating and synthesizing unit, and
- wherein a size of a spot of the second light beam flux on the diffusive reflector is greater than a size of a spot of the first light beam flux on the fluorescent body layer.
Dependencies are inferred from the claim text.