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. 30, 2001
Filed:
Jun. 23, 1999
Applicant:
Inventor:
Chuan He, Fremont, CA (US);
Assignee:
Read-Rite Corporation, Fremont, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 1/318 ; G02B 2/100 ; G02B 1/06 ; G11B 1/100 ; G11B 7/00 ;
U.S. Cl.
CPC ...
G02B 1/318 ; G02B 2/100 ; G02B 1/06 ; G11B 1/100 ; G11B 7/00 ;
Abstract
A near-field optical or magneto-optical data storage system uses an optical focusing device for focusing an incident optical beam to a small size focal spot. The optical focusing device includes an objective lens, an optically transparent base plate, and an optically transparent adapter. The adapter is secured to, and disposed intermediate the objective lens and the base plate, and includes an opening that faces the base plate. A fluid fills the adapter opening to form a fluid cell when the adapter is secured to the base plate. The fluid has an index of refraction that substantially matches the index of refraction of the base plate.