| 摘要 |
PURPOSE:To obtain an illumination light of high intensity by a small-sized laser light source by deflecting a laser beam having a sectional shape having sufficiently large aspect ratio in a longitudinal direction, then increasing it in a lateral direction, thereby illuminating all area by one scanning of an object. CONSTITUTION:A high frequency high voltage is applied in a sealed gas sealed in a housing through a dielectric with metal electrodes 2, 2' outside a housing 1, and a waveguide laser having a rectangular section, and an oscillator is formed of the laser, a full-reflecting mirror 3 and an output coupling mirror 3', and an oscillation mode that the sectional area is rectangular is performed. The mirror 3' operates also as an acoustic optical deflector, and both ends 31, 33 are a supersonic transducer and a sound absorber. When a travelling supersonic wave is directed from the transducer 31 to the absorber 32, a platelike laser beam is deflected in a lateral direction. A laser emitted from a deflector 33 is passed through a columnar concave lens 4 and increased in a longitudinal direction at that time. |
