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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.:

US 10074428 B1

PDFFull Text
Expired
Date of Patent:
Sep. 11, 2018

Filed:

Dec. 21, 2012

Optical recording device, optical recording method, and information recording medium

Applicant:

Hitachi, Ltd., Tokyo, JP;

Inventors:

Manabu Shiozawa, Tokyo, JP;

Yasuhiko Shimotsuma, Kyoto, JP;

Masaaki Sakakura, Kyoto, JP;

Kiyotaka Miura, Kyoto, JP;

Miki Nakabayashi, Kyoto, JP;

Assignee:

Hitachi, Ltd., Tokyo, JP;

Attorney:

Mattingly & Malur, PC

Primary Examiner:

Brian Butcher

Int. Cl.
CPC ...
G11B 7/0065 (2006.01); G11C 13/04 (2006.01); G11B 7/128 (2012.01); G11B 7/0045 (2006.01); G11B 7/013 (2006.01);
U.S. Cl.
CPC ...
G11C 13/042 (2013.01); G11B 7/0065 (2013.01); G11B 7/00455 (2013.01); G11B 7/013 (2013.01); G11B 7/128 (2013.01); G11C 13/048 (2013.01);
Abstract

In a recording technique in which a plurality of light spots are simultaneously formed by using an ultra-short pulse laser and a spatial phase modulator, and a plurality of recording dots having refractive indexes different from those of the vicinities thereof are formed inside a recording medium, it is hard to make recording quality and a recording density compatible. Therefore, a plurality of dots are recorded at a predetermined dot pitch, and then other dots are recorded between the recorded dots.

Find Patent Forward Citations

Shiozawa, Manabu. (2018). Optical recording device, optical recording method, and information recording medium (U.S. Patent No. 10074428). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10074428

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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