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:
Jan. 10, 2012
Filed:
Nov. 18, 2005
Pasi Laakkonen, Joensuu, FI;
Tapani Levola, Tampere, FI;
Pasi Laakkonen, Joensuu, FI;
Tapani Levola, Tampere, FI;
Nanocomp Oy Ltd, Lehmo, FI;
Abstract
An optical diffraction grating () is produced by providing a mold () having a plurality of inclined grooves (), which have a small clearance angle (γ). The mold () is covered by a curable material (M). Said material is subsequently cured, i.e. hardened, and separated from the mold () to provide the diffraction grating (). The inclined orientation of the grooves () allows expansion or contraction of the grating during the curing and separation steps such that the probability of mold breakage may be reduced. The inclined orientation of the grooves may also facilitate the separation of the grating () from the mold ().