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:
Aug. 24, 2010
Filed:
Jan. 11, 2006
Bong-gi Kim, Suwon-si, KR;
Soo-han Park, Yongin-si, KR;
Jang-hoon Yoo, Seoul, KR;
Hag-hyeon Jang, Seongnam-si, KR;
Ho-sik You, Suwon-si, KR;
Bong-Gi Kim, Suwon-si, KR;
Soo-Han Park, Yongin-si, KR;
Jang-Hoon Yoo, Seoul, KR;
Hag-Hyeon Jang, Seongnam-si, KR;
Ho-Sik You, Suwon-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
An optical pickup which is compatible with different types of media is disclosed. A plurality of light sources emit light with different wavelengths. Light path changers change the path of light emitted by the plurality of light sources so that the light is incident upon an objective lens. The objective lens focuses the incident light onto a recording medium. A collimating lens is disposed in front of the objective lens to collimate the incident lights. The collimating lens is movable to correct a spherical aberration. A diffractive optical element is disposed in a path of a light with a short wavelength and has a diffractive surface to correct a chromatic aberration.