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:
Feb. 05, 1991
Filed:
Feb. 20, 1990
Applicant:
Inventor:
Zahirudeen Premji, Boulder, CO (US);
Assignee:
Nikon Precision Inc., San Bruno, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
369 4412 ; 369 13 ; 369110 ; 369112 ; 360114 ; 350 961 ; 350 9612 ; 350 9614 ; 350375 ; 350376 ;
Abstract
An integrated optical device for magneto-optical recording and/or reading employs elements that may be fabricated on a substrate using semiconductor manufacturing technology. Such elements include, but are not limited to, a system of waveguides for transmitting light energy beams from lasers to end portions of the waveguides exposed to the outside of the substrate, and from those end portions to detectors, so that reading, writing, focusing, and tracking operations may be performed. The waveguide systems include, e.g., polarization controllers and mode splitters.