FIELD: optically changeable elements for ensuring protection of documents.
SUBSTANCE: optically changeable elements for ensuring protection of documents is composed of adjacent sections of substrate surface. Surface sections have achromatic surface structures with different characteristics of dissipation, reflection and/or diffraction and are combined with thin-film structure by means of mutual application onto one another. Visible effect of achromatic structure is applied to visible interference effect of thin-film structure, ensuring given change of color on change of direction of lighting of substrate with white light. When element is turned or tilted, observer observes certain, practically discontinuous change of colors.
EFFECT: increased efficiency.
2 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR USING PROTECTIVE ELEMENT AS PROTECTION FROM PHOTO-COPYING | 2003 |
|
RU2286887C2 |
| DIFFRACTION PROTECTING MEMBER | 2002 |
|
RU2291061C2 |
| PRINTING FILM FOR PRODUCTION OF TAMPER-PROOF NUMBER PLATES AND TAMPER-PROOF NUMBER PLATE CONTAINING PRINTING FILM | 2005 |
|
RU2339524C2 |
| DIFRACTION PROTECTIVE ELEMENT WITH A GREY-SCALE IMAGE | 2004 |
|
RU2326007C2 |
| OPTICALLY CHANGING ELEMENT WITH INTERMEDIATE LAYER OF VARIABLE THICKNESS | 2003 |
|
RU2317897C2 |
| PROTECTIVE ELEMENT IN FORM OF MULTILAYER FILM BODY | 2005 |
|
RU2357869C2 |
| PROTECTION ELEMENT, PROVIDED WITH MACRO-STRUCTURE | 2003 |
|
RU2314931C2 |
| OPTICAL PROTECTIVE ELEMENT AND SYSTEM FOR VISUALISATION OF HIDDEN INFORMATION | 2004 |
|
RU2344480C2 |
| OPTICALLY VARIABLE ELEMENT WITH ELECTRICALLY ACTIVE LAYER | 2005 |
|
RU2384417C2 |
| OPTICAL PROTECTIVE ELEMENT | 2004 |
|
RU2358317C2 |
