FIELD: devices for automatic identification of protective-item optical diffraction labels. SUBSTANCE: device has light source of for projecting parallel light beam onto document bearing protective item, optical collector element, photodetectors for converting light beams diffracted on labels or those reflected on substrate into electric signals, and computing unit for analyzing mentioned signals. EFFECT: reduced cost of device; simplified design of optical reader. 18 cl, 8 dwg, 1 tab
| Title | Year | Author | Number |
|---|---|---|---|
| DIFFRACTION SURFACE STRUCTURE | 1998 |
|
RU2193232C2 |
| PROTECTIVE ELEMENT WITH MICROSTRUCTURES AND MACROSTRUCTURES | 2003 |
|
RU2311304C2 |
| LABEL WITH DIFFRACTION BARCODE AND READING DEVICE FOR SUCH LABELS | 2002 |
|
RU2291485C2 |
| MULTILAYER OBJECT HAVING THREE-DIMENSIONAL HOLOGRAM | 2007 |
|
RU2438155C2 |
| PROTECTION ELEMENT WITH DIFFRACTION STRUCTURES | 2002 |
|
RU2271936C2 |
| DIFFRACTION PROTECTING MEMBER | 2002 |
|
RU2291061C2 |
| DIFFRACTION PROTECTIVE ELEMENT WITH INBUILT OPTICAL WAVE CONDUCTOR | 2002 |
|
RU2309048C2 |
| METHOD FOR USING PROTECTIVE ELEMENT AS PROTECTION FROM PHOTO-COPYING | 2003 |
|
RU2286887C2 |
| OPTICALLY CHANGEABLE PLANE SPECIMEN | 2002 |
|
RU2284918C2 |
| DIFRACTION PROTECTIVE ELEMENT WITH A GREY-SCALE IMAGE | 2004 |
|
RU2326007C2 |
