FIELD: physics.
SUBSTANCE: protected document contains an opaque substrate, optical wave guide located on the substrate and/or in it and a coupler for light conducting into or out of the wave guide. Meanwhile the coupler has a hole passing through a wave guide and through the whole opaque substrate.
EFFECT: enhanced protection against document forgery.
15 cl, 9 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| COVERED INSTRUMENT | 2008 |
|
RU2448840C2 |
| PROTECTED STRUCTURE CONTAINING MICROELECTRONIC DEVICE, AND WATERMARK OR ITS IMITATION | 2009 |
|
RU2511021C9 |
| IMAGE CAPTURING DEVICE AND IMAGE CAPTURING SYSTEM | 2015 |
|
RU2650368C2 |
| PROTECTIVE ELEMENT AND METHOD OF ITS PRODUCTION | 2006 |
|
RU2395400C2 |
| LIGHTING DEVICE BASED ON LIGHT GUIDE WITH LIGHT-SCATTERING PARTICLES AND LIGHT ANGLE SELECTION MODULE | 2013 |
|
RU2638822C2 |
| PROTECTIVE ELEMENT FOR COUNTERFEIT-PROOF DOCUMENTS, VALUABLE DOCUMENTS OR SIMILAR | 2012 |
|
RU2596088C2 |
| DATA CARRIER HAVING WINDOW | 2010 |
|
RU2499674C1 |
| MULTILAYER SUBSTRATE WITH MICROOPTICAL FACILITY | 2007 |
|
RU2435675C2 |
| IMAGE SENSOR AND IMAGER | 2012 |
|
RU2554292C2 |
| ASEPTIC BAG WITH SPOUT | 2010 |
|
RU2536203C2 |
