| 摘要 |
<p>An object lens and an optical pick-up device having the same capable of recording and/or reproducing a plurality of types of optical discs, the optical pick-up device including: a light emitting part (12,14,16) that emits lights having different wavelengths corresponding to the plurality of types of optical discs, and a light collecting part (30,32,34) that focuses a light having a wavelength corresponding to a type of a loaded optical disc and emitted from the light emitting part to form spots on the loaded optical disc. Accordingly, various types of optical discs using different wavelengths can be compatibly driven in an optical recording/reproducing apparatus capable of recording and/or reproducing high/low density optical discs.</p> |
