| 摘要 |
PROBLEM TO BE SOLVED: To switch plural objective lenses answering to plural kinds of optical disks and to improve responsiveness and reliability by simply forming its structure. SOLUTION: Plural objective lenses 12, 13 are provided successively on a lens holder 11, and the lens holder 11 is supported by elastic members 10 with a holder support member 5. The holder support member 5 supported by a holder slide mechanism 18 is slidden by a lens switch mechanism 19. Then, one piece between plural objective lenses 12, 13 is arranged on an optical path of a laser optical system 14 selectively. The lens holder 11 is formed simply and lightly by preventing the mechanism switching plural objective lenses 12, 13 from loading on the lens holder 11. |
