OPTICAL PICKUP AND OPTICAL INFORMATION PROCESSING

专利名称：OPTICAL PICKUP AND OPTICAL

INFORMATION PROCESSING APPARATUS

发明人：HAMANO, Yukiko,HIRAI, Hideaki申请号：EP07742339.0申请日：20070418公开号：EP2011117A1公开日：20090107

摘要：A disclosed optical pickup for performing at least recording, reproduction, ordeletion of information on a first, second, third, and fourth optical recording media havingdifferent recording densities includes a first light source configured to emit first lighthaving a first wavelength ?1 corresponding to the first and second optical recordingmedia; a second light source configured to emit second light having a second wavelength?2 corresponding to the third optical recording medium; a third light source configuredto emit third light having a third wavelength ?3 corresponding to the fourth opticalrecording medium; an objective lens configured to focus the first light, the second light,and the third light on corresponding recording surfaces of the first, second, third, andfourth optical recording media; and an aberration correcting unit between the objectivelens and the first, second, and third light sources.

申请人：Ricoh Company, Ltd.

地址：3-6, Nakamagome 1-chome, Ohta-ku Tokyo 143-8555 JP

国籍：JP

代理机构：Mounteney, Simon James

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