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. 18, 1998
Filed:
Jun. 12, 1997
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
An optical pickup having a beam shaping device for changing an oval-shaped light beam emitted from a light source into a circular light beam, and an astigmatic difference correcting device for correcting the astigmatic difference of the light is provided. The beam shaping device is a cylindrical lens arranged between the light source and a beam splitter, having a convex cross-section, for converging the incident light, e.g., with respect to an X-axial direction. The astigmatic difference correcting device is an astigmatism lens arranged along an optical path between the cylindrical lens and a light path changing device, as a concave lens, for linearly passing light of a certain direction and diverging light of other directions.