OPTICAL PICKUP DEVICE

An optical pickup apparatus for reproducing and/or recording information on an optical information recording medium, includes a light source to emit a light flux with a wavelength in the range of 200 - 700 nm, the emitted light flux having a light intensity distribution in nearly Gaussian distributi...

Full description

Saved in:
Bibliographic Details
Main Authors SAKAMOTO, KATSUYA, YOSHIDA, FUMIAKI
Format Patent
LanguageEnglish
French
German
Published 25.01.2006
Edition7
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
Online AccessGet full text

Cover

More Information
Summary:An optical pickup apparatus for reproducing and/or recording information on an optical information recording medium, includes a light source to emit a light flux with a wavelength in the range of 200 - 700 nm, the emitted light flux having a light intensity distribution in nearly Gaussian distribution; a light intensity distribution converting element to transform the light intensity distribution of the light flux emitted by the light source into a desired light intensity distribution wherein a light intensity of an outgoing light passing through an outermost periphery of an effective aperture becomes 45 % - 95 % of a light intensity of an outgoing light passing through an optical axis position; and an objective optical element to converge a light flux emitted by the light intensity distribution converting element onto an information recording surface on the optical information recording medium.
Bibliography:Application Number: EP20040728452