OBJECTIVE LENS DEVICE AND RECORDING AND REPRODUCING DEVICE

摘要

PROBLEM TO BE SOLVED: To make an objective lens device and a recording and reproducing device correspond to an optical recording medium different in base plate thickness and opening degree. SOLUTION: In this objective lens device 10, a distance between a 1st lens 11 and a 2nd lens 12 is adjusted by a 2nd lens driving mechanism 16 to be made correspond to the base plate thickness of an optical disk 20. By providing a 2nd diaphragm 15 on the surface 12a of the 2nd lens 12 proximately opposed to the optical disk 20 in addition to a 1st diaphragm 14, the device 10 is made correspond to the opening degree of the optical disk 20.