摘要 |
PROBLEM TO BE SOLVED: To linearly scan at a high speed, to miniaturize apparatus and to give a high resolution. SOLUTION: A vertical cavity face emitting type semiconductor laser 101 which emits a red laser light beam 103 having a wavelength of 633 nm is provided, a collimate lens 104 which transforms the laser light beam 103 into a parallel light beam 105 is provided, a rotationally driving unit 110 which rotationally drives a rotation axis 102 is provided, transparent disk 106 is mounted on the rotation axis 102, the thickness of the transparent disk 106 is continuously increased from the center to the outer edge on an arbitrary section intersecting the rotation center, and continuously increased (decreased) on an arbitrary concentric circle having the center on the rotation axis. COPYRIGHT: (C)2005,JPO&NCIPI
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