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:
Apr. 27, 2010
Filed:
Nov. 11, 2005
Andrei Mijiritskii, Zaltbommel, NL;
Sjoerd Stallinga, Eindhoven, NL;
Bernardus Hendrikus Wilhelmus Hendriks, Eindhoven, NL;
Stein Kuiper, Eindhoven, NL;
Albert Hendrik Jan Immink, Eindhoven, NL;
Teunis Willem Tukker, Eindhoven, NL;
Coen Theodorus Hubertus Fran Liedenbaum, Eindhoven, NL;
Andrei Mijiritskii, Zaltbommel, NL;
Sjoerd Stallinga, Eindhoven, NL;
Bernardus Hendrikus Wilhelmus Hendriks, Eindhoven, NL;
Stein Kuiper, Eindhoven, NL;
Albert Hendrik Jan Immink, Eindhoven, NL;
Teunis Willem Tukker, Eindhoven, NL;
Coen Theodorus Hubertus Fran Liedenbaum, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
In an optical scanning device () capable of scanning an information plane of an optical record carrier () of different types such as BD, DVD and CD, the diameter of the radiation spot on the detector () is dependent on the numerical aperture of the objective system () that is used for scanning the record carrier An optimal design of the optical detection system for scanning a BD, result in a small radiation spot for the other types such as DVD and CD. By implementing an optical element () that increases the diameter of the radiation spot in the situation a DVD or CD is scanned, the influence of stray light is reduced and the tracking signals are improved