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. 27, 2007
Filed:
Oct. 23, 2006
Akinari Takagi, Yokosuka, JP;
Kazuya Nobayashi, Kawasaki, JP;
Hikaru Hoshi, Yokohama, JP;
Kiyokatsu Ikemoto, Yokohama, JP;
Akinari Takagi, Yokosuka, JP;
Kazuya Nobayashi, Kawasaki, JP;
Hikaru Hoshi, Yokohama, JP;
Kiyokatsu Ikemoto, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A three-dimensional photonic crystal has periodic-refractive-index structures including a first layer having a periodic structure based on a first rectangular lattice having a period of A along a first axis and a period of B along a second axis orthogonal to the first axis in the plane direction, a second layer having a periodic structure disposed at a position shifted by +3B/8 along the second axis with respect to the position of the first rectangular lattice, a third layer having a periodic structure disposed at a position shifted by A/2 along the first axis and B/2 along the second axis with respect to the position of the periodic structure in the first layer, and a fourth layer having a periodic structure disposed at the same position as the periodic structure in the second layer.