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:
Jul. 09, 2002
Filed:
Nov. 05, 1999
Yoshiyuki Sekine, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A phase type computer hologram has a plurality of cells for applying a predetermined phase to different portions of a wavefront of light, wherein no phase skip larger than &pgr; is present in the cells. Such a phase type computer hologram can be produced by a process of determining phases for a plurality of cells, respectively, smoothening a distribution of the phases of the cells, by shifting the phase of at least one of the cells by 2&pgr;, and forming, on a substrate, the cells whose phase distribution is smoothened in the smoothening step.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile