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:
Jan. 27, 2009
Filed:
Mar. 11, 2005
Wen-hsin Sun, Tu-Cheng, TW;
Wen-Hsin Sun, Tu-Cheng, TW;
Hon Hai Precision Industry Co., Ltd., Tu-Cheng, Taipei Hsien, TW;
Abstract
An optical pickup head () for a high density recording and/or reproducing device compatible with first and second optical recording media. The pickup head includes a first light source () emitting first light beams with a first wavelength, a second light source () emitting second light beams with a second wavelength greater than the first wavelength, a prism unit (), a collimating lens () located beside the prism unit for collimating incident first and second light beams, and an objective lens () for receiving the first and second light beams and transmitting the first and second laser beams to the first and second recording media respectively. The prism unit includes a first portion facing the first light source and receiving the first light beams, a second portion facing the second light source and receiving the second light beams, and an aspherical surface for the second light beams to pass therethrough.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile