Lighting system having lenses for light sources emitting rays at different wavelengths
A lighting system includes a first light source emitting first light rays; a second light source emitting second light rays, a first lens side which refracts the first and second light rays and collimates the refracted light rays; a second lens side which includes a plurality of first lenticules and refracts the first and second light rays; and a third lens side which includes a plurality of second lenticules and refracts the first and second light rays refracted by the second lens side.
1. A lighting system comprising:
a first light source emitting first light rays;
a second light source having a light emitting point partly displaced from the first light source and emitting second light rays whose wavelength differs from a wavelength of the first light rays;
a first lens including a first lens side facing the first and second light sources, and a second lens side being opposite to the first lens side, the first lens side which refracts and collimates the first and second light rays, the second lens side which includes a plurality of juxtaposed first lenticules and refracts the first and second light rays collimated by the first lens side; and
a second lens including a third lens side facing the second lens side, the third lens side which includes a plurality of juxtaposed second lenticules and refracts the first and second light rays refracted by the second lens side,
wherein each of the first lenticules has a convex surface curved outward toward the third lens side; each of the second lenticules has a convex surface curved outward toward the second lens side; each of the second lenticules correspond to each of the first lenticules on a one-to-one basis; the first lenticules collect the first and second light rays on the corresponding second lenticules, respectively; and a part of a first illumination area of the first and second light rays refracted by one of the first lenticules and one of the second lenticules overlaps with a part of a second illumination area of the first and second light rays refracted by another one of the first lenticules and another one of the second lenticules.
2. The lighting system defined in claim 1 , wherein the first light source is a semiconductor light emitting element: and the second light source is a fluorescent object which extends over a first light emitting area of the semiconductor light emitting element, and emits fluorescent light in response to the first light ray.
3. The light system defined in claim 2 , wherein the first lens side is curved outward toward the semiconductor light emitting element.
4. The lighting system defined in claim 2 , wherein the first lens side is a Fresnel lens which is curved outward toward the semiconductor light emitting element.
5. The lighting system defined in claim 1 , wherein the first lens side is a Fresnel lens; and the second lens side is a fly-eye lens.
6. The lighting system defined in claim 1 , wherein the first lens side is a Fresnel lens; and the third lens side is as a fly-eye lens.
7. The lighting system defined in claim 2 , wherein the semiconductor light emitting element emits the first light rays whose wavelength is equal to a wavelength of blue light rays.
8. The lighting system defined in claim 2 , wherein the fluorescent object emits the second light rays which are yellow or whose wavelength is equal to a combination of wavelengths of yellow and red light rays.