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:
Jul. 18, 2000
Filed:
Sep. 08, 1998
Applicant:
Inventor:
Werner Spath, Holzkirchen, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369112 ; 369 4414 ; 369 4423 ; 369 13 ; 359664 ;
Abstract
An immersion system for a magneto-optical storage device has a spherical-segment-shaped lens. The lens is formed of material that is transparent to the electromagnetic radiation of the wavelength .lambda. at which the device is operated, and preferably of a semiconductor material. The lens has a first refractive index n.sub.1 which is greater than that of air. A layer with a higher refractive index than the lens is disposed in the propagation path of the electromagnetic radiation. The layer is composed of a material with a second refractive index n.sub.2 that is greater than the first refractive index n.sub.1 of the material of the lens.