| US 7,551,654 B2 | ||
| Coherent light source and optical system | ||
| Kiminori Mizuuchi, Osaka (Japan); Kazuhisa Yamamoto, Osaka (Japan); Ken'ichi Kasazumi, Osaka (Japan); Isao Kidoguchi, Hyogo (Japan); and Yasuo Kitaoka, Osaka (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Appl. No. 10/591,983 PCT Filed Feb. 22, 2005, PCT No. PCT/JP2005/002797 § 371(c)(1), (2), (4) Date May 22, 2007, PCT Pub. No. WO2005/088787, PCT Pub. Date Sep. 22, 2005. |
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| Claims priority of application No. 2004-066879 (JP), filed on Mar. 10, 2004. | ||
| Prior Publication US 2007/0263678 A1, Nov. 15, 2007 | ||
| Int. Cl. H01S 3/10 (2006.01); H01S 5/00 (2006.01) | ||
| U.S. Cl. 372—22 [372/21; 372/49.01] | 10 Claims |
| 1. A coherent light source for simultaneously emitting a first light and a second light having a wavelength shorter than that
of the first light, comprising:
a light source main body for emitting at least the first light;
a member arranged to transmit or reflect the first light; and
a functional film being provided on at least a part of the member, the functional film having a photocatalytic effect to be
induced by the second light,
wherein the first light and the second light are to irradiate approximately equal areas on an irradiation surface of the member
including the functional film,
wherein the wavelength of the first light is greater than or equal to 400 nm and less than or equal to 460 nm, and the wavelength
of the second light is less than or equal to 390 nm.
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