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:
Mar. 29, 2011
Filed:
Nov. 05, 2003
Jianmin Wang, Fremont, CA (US);
Jason L. Pressesky, Menlo Park, CA (US);
Shih-fu Lee, Fremont, CA (US);
Jianmin Wang, Fremont, CA (US);
Jason L. Pressesky, Menlo Park, CA (US);
Shih-Fu Lee, Fremont, CA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
An optical profiler for an ultra-smooth surface, such as a magnetic recording disk, provides for a normally incident beam deflection against the target surface to be profiled. A linearly polarized laser light of a first polarization is focused on the target surface in a normally incident direction. The beam is reflected back along its original path from the focal point. Optics are provided that change the polarization of the reflected beam to a second polarization. A reflected beam, with a second polarization, is directed onto a position sensitive detector for evaluation.