Many methods have been proposed to improve the coupling efficiency of the grating coupler [10-13], and
blazed grating coupler is widely studied [14-17].
For a straight periodic
blazed grating, the grating period can be expressed as,
Perhaps the most exciting aspect of the new writing head is the ability to write
blazed grating structures.
In its simplest form the barcode can be printed on the hologram, but Kurz stresses the aesthetic advantages (and the security advantages) of incorporating it in the hologram as a
blazed grating which Kurz describes as a 'diffractive, holographic-like structure'.
Standard first line security elements in DOVIDs could for instance be
blazed grating graphics, zero order graphics, true colour 3D holograms and animations based on both varying grating orientation and frequency, while tilting might be standardized about the horizontal axis.
They are holographic devices that are individually created as required, Holospot on tesa's adhesive polymer film, kinoform as a
blazed grating potentially on the product itself.
Champaign, IL, November 15, 2018 --(PR.com)-- A contract has been awarded to Inprentus for the custom manufacture of four mechanically ruled
blazed gratings for the US Department of Energy's SLAC National Accelerator Laboratory.