For optical data storage applications a near field optical system can be used. In near field optical systems an accurate alignment of a solid immersion lens with respect to a disc surface is crucial. The correction of a tilt between the lens and the disc is performed by use of auxiliary beams. By comparing the gap signal for the auxiliary beams the air gap height and disc tilt can be determined.
申请公布号
WO2007004141(A2)
申请公布日期
2007.01.11
申请号
WO2006IB52159
申请日期
2006.06.28
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.;ZIJP, FERRY;VERSCHUREN, COEN, A.