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:
Aug. 06, 2002
Filed:
Mar. 20, 2000
Applicant:
Inventors:
Yasuyuki Mitsuoka, Mihama-ku, JP;
Norio Chiba, Mihama-ku, JP;
Nobuyuki Kasama, Mihama-ku, JP;
Takashi Niwa, Mihama-ku, JP;
Kunio Nakajima, Mihama-ku, JP;
Assignee:
Seiko Instruments Inc., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 3/14 ; H01J 5/16 ; H01J 4/014 ;
U.S. Cl.
CPC ...
H01J 3/14 ; H01J 5/16 ; H01J 4/014 ;
Abstract
A near-field optical head has a tip end having an edge portion defined by two intersecting planes. Information recorded on a recording medium is reproduced in accordance with an intensity of scattered light of an evanescent field generated when the recording medium is illuminated with light and the tip end of the optical head is brought proximate the recording medium at an interval equal to or smaller than a wavelength of light therebetween.