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. 13, 2007
Filed:
May. 15, 2003
Masaaki Nakabayashi, Kanagawa, JP;
Masaaki Nakabayashi, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for manufacturing a diffraction optical element, according to the present invention, includes the steps of: supplying a photocurable resin onto a surface of a light-transmitting molding die in which a grating pattern is formed on the surface; irradiating the photocurable resin with light having a first wavelength through the molding die so as to cure a part of the photocurable resin; irradiating the photocurable resin with light having a second wavelength, which is longer than the firs wavelength, through the molding die so as to cure at least a part of the photocurable resin; and removing the cured resin from the molding die.