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:
Mar. 24, 2009
Filed:
Oct. 20, 2006
Toshihiro Nakajima, Hamamatsu, JP;
Toshihiro Nakajima, Hamamatsu, JP;
Yamaha Corporation, Shizuoka-Ken, JP;
Abstract
Pluralities of lens partsare formed on a lens substrateby dry-etching. The lens partsandhave same structures, and the lens partincludes toroidal lens surfaces Sand Sopposing to each other on one principal surface and another principal surface of the substrate. Assuming that a cross section in a y-axis direction of a laser beam emitted from a laser active layer in a z-axis direction is long and narrow in an x-axis direction, the lens surface Sis formed to have a radius of curvature Rin the x-axis direction smaller than a radius of curvature Rin the y-axis direction, and the lens surface Sis formed to have a radius of curvature Rin the x-axis direction smaller than a radius of curvature Rin the y-axis direction.