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. 22, 2016
Filed:
Feb. 15, 2012
Tatsutoshi Suenaga, Osaka, JP;
Yuka Okada, Hyogo, JP;
Akiko Murata, Osaka, JP;
Abstract
In a diffraction optical element having a structure in which a base and an optical adjustment layer adhere to each other, defects such as cracks and peeling occur in the optical adjustment layer, when the adhesive strength between the base and the optical adjustment layer is degraded. In a diffraction optical elementof the present invention, a plurality of anchor groovesare formed in a planar second regionof a base. Further, a depth of an anchor groove of the plurality of anchor grooves, which is positioned on an outermost side, is designed so as to be smaller than a depth of another anchor groove of the plurality of anchor grooves, which is positioned on an innermost side. An optical adjustment layeradheres so as to cover a first regionin which a diffraction gratingis formed and the second regionin which the anchor groovesare formed of the base