The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 1997
Filed:
May. 16, 1996
Yong-Jae Lee, Uiwang, KR;
Samsung Electronics, Co., Ltd., Kyungki-Do, KR;
Abstract
An optical pickup for high-density recording/reproducing, which can read the information recorded at a close interval to exceed the limit of a given cut-off frequency, includes an objective lens having divided portions for respectively transmitting a zero-order optical component and .+-.1st-order diffracted components. To detect a signal for reproduction, a focusing lens is used for focusing the zero-order component and .+-.1st-order diffracted components passing back through the objective lens so as to mutually interfere. Stable high-density optical recording/reproduction can be realized regardless of the numerical aperture of the objective lens and the optical wavelength.