| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tilt detection optical system or the like which is incorporated easily in a pickup, detects simultaneously disk tilt and objective lens tilt by optical constitution, and obtains a compensation signal of relative tilt of the both by signal processing. <P>SOLUTION: In the tilt detection optical system provided with a light source 1, a coupling lens (CL provided integrally with the light source 1), and a position sensor 3, the system has such constitution that tilt of a reflector 2 arranged between the coupling lens CL and the position sensor 3 is detected. Thereby, since distance between the light source and an object to be detected, the object to be detected and the position sensor can be set freely, when the optical source, the position sensor, a deflection mirror, the coupling lens, or the like are incorporated in optical pickup, they can be constituted easily. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
