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1. (WO2003015085) OPTICAL SCANNING DEVICE
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2003/015085 International Application No.: PCT/IB2002/002821
Publication Date: 20.02.2003 International Filing Date: 08.07.2002
IPC:
G11B 7/12 (2012.01) ,G11B 7/135 (2012.01) ,G11B 7/00 (2006.01) ,G11B 7/125 (2012.01)
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
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
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
125
Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
Applicants:
KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL/NL]; Groenewoudseweg 1 NL-5621 BA Eindhoven, NL
Inventors:
VERBECQUE, Rene; NL
JUTTE, Petrus, T.; NL
Agent:
VISSER, Derk; Internationaal Octrooibureau B.V. Prof. Holstlaan 6 NL-5656 AA Eindhoven, NL
Priority Data:
01203059.910.08.2001EP
Title (EN) OPTICAL SCANNING DEVICE
(FR) DISPOSITIF DE BALAYAGE OPTIQUE
Abstract:
(EN) An optical pickup unit for scanning an optical disk includes a first optical branch including a first radiation source for emitting a first radiation beam of a first wavelength, and a dichroic mirror (8) located in the path of the first radiation beam for reflecting the first beam towards the disk, and a second optical branch including a second radiation source for emitting a second radiation beam of a second wavelength, different to said first wavelength, and a folding mirror (28) located in the path of the second radiation beam for reflecting the second beam towards the disk. The first and second branches are stacked in the axial direction of the disk, and are arranged substantially perpendicularly when viewed along the axial direction.
(FR) La présente invention concerne une unité de lecture optique destinée à balayer un disque optique, qui comprend : une première branche optique comportant une première source de rayonnement qui émet un premier faisceau de rayonnement d'une première longueur d'onde, et un miroir dichroïque (8) placé sur la trajectoire du premier faisceau de rayonnement, qui réfléchit le premier faisceau vers le disque ; et une seconde branche optique comportant une seconde source de rayonnement qui émet un second faisceau de rayonnement d'une seconde longueur d'onde, différente de la première longueur d'onde, et un miroir de renvoi (28) placé sur la trajectoire du second faisceau de rayonnement, qui réfléchit le second faisceau vers le disque. La première et la seconde branches sont empilées dans la direction axiale du disque, et sont agencées de manière sensiblement perpendiculaire lorsqu'elles sont vues dans la direction axiale.
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Designated States: CN, IN, JP, KR
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
Publication Language: English (EN)
Filing Language: English (EN)