OPTICAL HEAD AND OPTICAL DISK DRIVE EMPLOYING THE SAME

PROBLEM TO BE SOLVED: To provide a small-sized optical head with high performance. SOLUTION: In the optical head provided with: at least one laser light source 2; a collimate lens 6; an objective lens 8; a photodetector 11 for receiving a reflected light from an optical disk 9; and an optical compon...

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Bibliographic Details
Main Authors FUJIMORI SHINYA, ONISHI KUNIKAZU, MAEDA NOBUYUKI
Format Patent
LanguageEnglish
Published 31.10.2003
Edition7
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To provide a small-sized optical head with high performance. SOLUTION: In the optical head provided with: at least one laser light source 2; a collimate lens 6; an objective lens 8; a photodetector 11 for receiving a reflected light from an optical disk 9; and an optical component located in a carriage and having functions of reflecting or transmitting a luminous flux emitted from the laser light source 2 and leading the luminous flux to the collimate lens 6 and of reflecting or transmitting a reflected light from the optical disk 9 and leading the light to the photodetector 11, a filter 13 is arranged, the transmissivity of which is increased or decreased in the radial direction of an information recording disk medium, between the optical component and the photodetector. COPYRIGHT: (C)2004,JPO
Bibliography:Application Number: JP20020111471