ASPHERIC LENS AND OPTICAL PICKUP EMPLOYING THE SAME AS OBJECTIVE LENS

PURPOSE: An aspheric lens and an optical pickup employing the same as an objective lens are provided to increase tolerance of axis deviation without increasing the slope of a lens surface. CONSTITUTION: An optical pick-up(50) comprises a light source(11), an objective lens(17), an optical detector(1...

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Bibliographic Details
Main Authors PARK, SOO HAN, SEO, JOONG EON, MORISHITA ICHIRO, KIM, BONG GI
Format Patent
LanguageEnglish
Korean
Published 06.07.2010
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:PURPOSE: An aspheric lens and an optical pickup employing the same as an objective lens are provided to increase tolerance of axis deviation without increasing the slope of a lens surface. CONSTITUTION: An optical pick-up(50) comprises a light source(11), an objective lens(17), an optical detector(19), an optical path converter(15), a wave plate(13), and a collimating lens(12). The objective lens focuses incident light onto an optical disc. The optical detector receives the light reflected off the optical disc. The light path converter changes a propagation path of the incident light. The wave plate diversifies the polarized light of the incident light. The collimating lens makes collimated light enter the objective lens.
Bibliography:Application Number: KR20080134953