| OPSEC SECURITY GROUP, INC. Patent applications |
| Patent application number | Title | Published |
|---|
| 20140268327 | OPTICALLY VARIABLE DEVICE EXHIBITING NON-DIFFRACTIVE THREE-DIMENSIONAL OPTICAL EFFECT - An optically variable device includes a substrate and a plurality of optical elements formed in or on the substrate and being structured to provide a three-dimensional optical effect for a viewer when light is incident on the optical elements. The plurality of optical elements are arranged as a plurality of stereo pairs structured to reflect or refract light to corresponding focal points in three-dimensional space apart from the optically variable device to form the three-dimensional optical effect. The optical elements include one or more optical elements that are curved structures having a curvature that is either less than or greater than a semi-circle. | 09-18-2014 |
| 20140264168 | SECURITY DEVICE USING LIQUID CRYSTALS - The invention generally relates to optically variable devices, methods of preparation and applications or uses therefor. In particular, the invention includes trigger molecules employed as a dopant for a liquid crystal material. The liquid crystal material contains helical elements having a natural twist. The dopant is effective to change the natural twist of the helical elements when the dopant is addressed with incident light. Suitable dopants are selected from binaphthalene and derivatives thereof. | 09-18-2014 |
| 20140232974 | SECURITY DEVICE HAVING OPTICALLY VARIABLE DEVICE PORTION AND METHOD OF MAKING THE SAME - A security device includes a liquid crystal layer having one of a cholesteric phase, a nematic phase, and a cholesteric phase and having molecules therein aligned volumetrically in a predetermined manner to form a predetermined diffractive optical pattern or image. The molecules of the liquid crystal layer are volumetrically aligned in the predetermined manner through at least a portion of the thickness of the liquid crystal layer. | 08-21-2014 |
| 20140103634 | STRUCTURED COLOR FILTER DEVICE - A structured color filtering device includes one or more unit cells. Each unit cell includes a substrate having a surface with a step function surface profile having two or more discrete levels formed therein. The step function surface profile forms in the surface a plurality of grooves arranged in a fundamentally symmetric pattern having a periodic groove pitch. When ordinary light is incident on the surface, the surface is structured to diffract light having a predetermined wavelength toward observation points at all polar angles above the surface greater than a predetermined incident angle. | 04-17-2014 |
| 20130266722 | OPTICALLY VARIABLE DEVICE WITH DIFFRACTION-BASED MICRO-OPTICS, METHOD OF CREATING THE SAME, AND ARTICLE EMPLOYING THE SAME - A security device includes an optically variable device (OVD) having diffraction-based micro-optics including at least one moiré magnified visual representation of a micro-object. A diffractive structure provides micro-objects with unique optical effects when the OVD is viewed through the micro-object structure from a predetermined relative observation point. In addition to magnifying the micro-objects, the diffractive structure can impart optical effects such as change in observed color, enhanced contrast, animation of the observed visual representation, and change in size or shape of the observed visual representation. The micro-objects and the diffractive structure can be disposed on the same or different portions of a substrate. A method of making OVDs, and an article employing such OVDs are also disclosed. | 10-10-2013 |
| 20090141355 | SECURITY DEVICE, REFLECTIVE LAYER THEREFOR, AND ASSOCIATED METHOD - The present invention relates to a security device for resisting counterfeiting and verifying the authenticity of an article and, more particularly, to a nanoparticle containing coating composition applied thereon to produce a reflective layer for use with diffractive security devices. | 06-04-2009 |
| 20090050253 | Reprocess Indicating Device - The present invention provides a secure indicator label device for use on an article or container which includes a visual indicator, tamper-evident and/or anti-counterfeit features. Also provided are methods for indicating whether an article or the contents of a container have been exposed to a particular environment and a method for reducing the likelihood of improper re-use of a single-use article or container. | 02-26-2009 |
