| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical device that can branch a laser beam into two beams and adjust the interval between the two beams by a simple configuration. <P>SOLUTION: The optical device includes: a beam splitter 31 by which a laser beam Lb oscillated from an oscillator 2 is branched into a first branch beam going ahead through transmission and a second branch beam going ahead through reflection; a first mirror 34 by which the first branch beam Lb1 going out of the beam splitter 31 is reflected to go again toward the beam splitter; a second mirror 36 by which the second branch beam Lb2 going out of the beam splitter 31 is reflected to go again toward the beam splitter 31; and a circular disk-like rotating unit 37 for integrally rotating the first mirror 34 and the second mirror 36, with a branch point 32 of the laser beam Lb in the beam splitter 31 as a center of rotation. <P>COPYRIGHT: (C)2012,JPO&INPIT |
