| 摘要 |
PROBLEM TO BE SOLVED: To provide a linear light radiation device capable of freely changing a divergence angle of linear light. SOLUTION: A columnar lens 20 for converting a laser light flux emitted from a laser light source 10 to a linear light flux and a cylindrical lens 20 for converging or diffusing the linear light flux emitted from the columnar lens 20 are disposed on an optical axis of the laser light flux emitted from the laser light source 10, and a lens moving means is provided which moves the cylindrical lens 30 in a direction of an optical axis and comprises a linear guide device 40 and a ball screw device 50. Since a divergence angle of linear light passing the cylindrical lens 30 is changed in accordance with a distance between the columnar lens 20 and the cylindrical lens 30, the cylindrical lens 30 is moved in the direction of the optical axis by using the lens moving means, whereby linear light having a proper spread angle according to a distance to an object to be irradiated can be obtained. COPYRIGHT: (C)2007,JPO&INPIT
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