| 摘要 |
PROBLEM TO BE SOLVED: To enhance the efficiency of condensing ultraviolet beams emitted in a head structure of an ultraviolet irradiation apparatus. SOLUTION: A light source 30 emitting ultraviolet beams and condensing optical systems (40, 60) comprising two nearly-semi-spherical lenses with their optical axes C0 aligned with each other are accommodated in the interior of a housing 20, and the ultraviolet beams emitted from the light source 30 are condensed on a resin member 200 disposed on a specified position outside of the housing 20. The first lens 40 having a small radius of curvature (e.g.,ϕ5 mm) is disposed nearer to the light source 30 than the second lens 60 having a large radius of curvature (e.g.,ϕ10 mm). COPYRIGHT: (C)2007,JPO&INPIT
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