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1. (KR1020080033347) OPTICAL PICK-UP AND/OR RECORDING DEVICE

Office : Republic of Korea
Application Number: 1020087002890 Application Date: 04.02.2008
Publication Number: 1020080033347 Publication Date: 16.04.2008
Publication Kind : A
IPC:
G11B 7/135
G11B 7/12
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
12
Heads, e.g. forming of the optical beam spot or modulation of the optical beam
135
Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
12
Heads, e.g. forming of the optical beam spot or modulation of the optical beam
CPC:
G11B 7/1387
G11B 7/0956
G11B 7/122
Applicants: KONINKLIJKE PHILIPS ELECTRONICS N.V.
Inventors: ZIJP FERRY
VERSCHUREN COEN A.
Priority Data: 2005 05106048 04.07.2005 EP
Title: (EN) OPTICAL PICK-UP AND/OR RECORDING DEVICE
Abstract: front page image
(EN) 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. ©KIPO&WIPO 2008
Also published as:
EP1905024JP2009500776US20080165632CN101218641MYPI 20063164IN588/CHENP/2008
WO/2007/004141