G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 5/18 (2006.01) B42D 15/00 (2006.01) B42D 15/10 (2006.01) G02B 27/44 (2006.01) G03H 1/30 (2006.01) G06K 19/16 (2006.01)
Patent
CA 2065309
A diffraction grating providing an optically var- fable image includes a pixellated diffraction grating in which each pixel is an individual optical diffraction grat- ing so that the pixellated diffraction grating when illumi- nated generates an optically variable image. In another aspect the grating in some or all of the pixels of a dif- fracting grating formed by a regular matrix of pixels is arranged such that a reproduction of the grating by ref- lection contact printing generates a zero-order pattern which is grossly flawed by Moire or Talbot fringe ef- fects. A method of forming the diffraction, grating in- cludes producing a counterpart pixellated diffraction grating of a substantially optically invariable image wherein each pixel of the optically invariable image is maped to a respective pixel of the pixellated diffraction grating: Each grating pixel is an individual optical dif- fraction grating of the associated pixel in the optically invariable image, so that the pixellated diffraction grit- ing when illuminated generates an optically variable rep- roduction of the optically invariable image.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Commonwealth Scientific And Industrial Research Organisation
LandOfFree
Diffraction grating and method of manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Diffraction grating and method of manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffraction grating and method of manufacture will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1492249