| 摘要 |
PROBLEM TO BE SOLVED: To prevent a condensing lens from being soiled by gaseous particles generated by abrasion, as for a laser exposure device for exposing a photosensitive material by abrading it with laser light. SOLUTION: The laser exposure device 1 is provided with a laser light source 2 for emitting the laser light L and the condensing lens 3, and the laser light L emitted from the laser light source 2 is condensed by the condensing lens 3 so as to expose a target point P on the photosensitive material. In the laser exposure device 1, the laser light L is made obliquely incident on the target point P.
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