| 摘要 |
PROBLEM TO BE SOLVED: To provide wide angle laser line irradiation apparatus and method capable of reducing the cost by minimizing the number of part items and easily performing an adjustment for forming one linear laser line. SOLUTION: In this apparatus and method, two point units 31 and 32 comprising laser beam sources 33 and 36 and collimator lenses 34 and 38 for making the laser beams from the laser beam sources 33 and 36 to parallel luminous fluxes are used. The pointer units 31 and 32 are arranged so that the laser luminous fluxes from the respective point unites are mutually crossed, and one cylindrical lens 40 is arranged in the intersection of the laser luminous fluxes. The cylindrical lens 40 is arranged so that the laser luminous flux from each pointer unit 31, 32 is incident from a direction orthogonal to the central axis of the cylindrical lens 40.
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