| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical pickup device with yield improved by having a structure that can suppress coma aberration as appropriate and that can respond plural kinds of optical disks with one object lens. <P>SOLUTION: A common optical path used commonly is included between a first optical path from a first light source 11 to an object lens 17 and a second optical path from a second light source 21 to the object lens 17 in an optical pickup device 1, and a second coma aberration occurs in the second optical path outside the common optical path. In the case where a coma aberration of the object lens 17 alone is regarded as a first coma aberration, the object lens 17 is tilted to an optical axis so as not to cause the first coma aberration when the first light source 11 is used, and moreover, the object lens 17 is assembled in a direction in which the direction where the first coma aberration occurs and the direction where the second coma aberration occurs when the second light source 21 is used are offset. <P>COPYRIGHT: (C)2012,JPO&INPIT |
