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:
Oct. 19, 2004
Filed:
Dec. 20, 2001
Chi-Lone Chang, Hsin-Chu Hsien, TW;
Hsi-Fu Shih, Chang-Hua Hsien, TW;
Yuan-Chin Lee, Hsin-Chu, TW;
Chau-Yuan Ke, Ping-Tung Hsien, TW;
Dai-Tin Huang, Hsin-Chu, TW;
Jau-Jiu Ju, Hsin-Chu Hsien, TW;
Industrial Technology Research, Hsin-Chu Hsien, TW;
Abstract
A planar integrated micro-optical pickup head is used to perform reading and writing operations on a high-density disk. The planar integrated micro-optical pickup head includes a set of optical elements that is comprised of a beam splitter, a plurality of 45-degrees-oriented folding mirrors, and two planar collimators. The pickup head further comprises a photo-detector, a laser source for emitting a laser beam of short wavelength, and an objective lens of high value of numerical aperture. The set of optical elements is formed on lower and upper substrates via semiconductor planar fabrication processes, the laser source and the objective lens then are mechanically attached on the lower substrate. The lower and upper substrates are ultimately aligned and attached with each other to achieve the pickup head hence having a reduced size and simply fabricated.