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:
Nov. 18, 2008
Filed:
Nov. 02, 2004
Peter Ferdinand Greve, Eindhoven, NL;
Albert Bijlsma, Eindhoven, NL;
Willem Jannis Rosier, Eindhoven, NL;
Peter Ferdinand Greve, Eindhoven, NL;
Albert Bijlsma, Eindhoven, NL;
Willem Jannis Rosier, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The focus of an optical system () can be determined in a reliable and accurate way by arranging a first and second test object () having a periodic structure at different sides of the focal plane () of the optical system and determining the difference in modulation depth of the images formed on different areas () of a radiation-sensitive detection system ().
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile