US Patent 7355945 Optical pickup adjusting apparatus and adjusting method

Patent 7355945 was granted and assigned to Sony on April, 2008 by the United States Patent and Trademark Office.

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Patent Inventor Names

Hideo Nagasaka0

Yutaka Shimada0

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Patent abstract

An adjustment apparatus for adjusting an optical pickup capable of recording and/or reproducing optical discs of different sorts. The adjustment apparatus is an adjustment optical disc having a first signal recording layer of a physical format in common with a CD and a second signal recording layer of a physical format in common with a DVD. On the first and second signal recording layers, there are concentrically recorded EFM modulated data. The respective signal recording layers are provided with recording areas that are not overlapped with each other.

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Official Website

https://pdfpiw.uspto.gov/.piw?Docid=07355945

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