| 摘要 |
PROBLEM TO BE SOLVED: To provide an angle correction correction optical unit in which the emission angle of a beam is simply and accurately corrected and to provide an inexpensive laser marking device which is furnished with the optical unit and emits a plurality of lines of light. SOLUTION: The device has a first wedge prism which is composed of such a light transmissible body as glass or plastic, a means which holds the first wedge prism turnably around a predetermined axis, a second wedge prism composed of a light transmissive body arranged closely or in contact with the first wedge prism and a means holds the second wedge prism turnably around the predetermined axis independently of the first wedge prism, and the device is so composed that a beam made incident to the first wedge prism is emitted from the second wedge prism and the angle of the emitted beam is corrected by independently turning the first and the second wedge prisms by a desired angle. COPYRIGHT: (C)2005,JPO&NCIPI
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