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:
Jun. 30, 2009
Filed:
Sep. 07, 2005
Toshihiro Nakajima, Hamamatsu, JP;
Toshihiro Nakajima, Hamamatsu, JP;
Yamaha Corporation, Shizuoka-Ken, JP;
Abstract
A micro lens array has a translucent substrate of glass or the like and convex lenses formed on a principal surface of the substrate. Guide pin insertion holes are formed through the substrateon opposite sides of a line of lenses. A metal layerwith at least three metal projections is formed only in an inner wall section of each of the holes by a plating process so as to gradually increase an opening size of the hole at higher positions. The inner wall section has a depth of about 50 to 100 μm from the opening end on the guide pin insertion side. The metal layer may be omitted. Instead of the metal projections, a metal layer forming the hole having a polygonal shape may be used.