Dispositivo variable óptico
The invention refers to an optical variable device and finds application as a decorative and security element against counterfeiting of documents, securities, goods, etc. It includes a first relief diffractive structure (1) with Fresnel structure of a arbitrary object (3). A second relief diffractiv...
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| creator | STOILOV, Georgi Ivanov TONCHEV, Dimitar Antonov POGAN, Ignat BALDZHIEV, Angel Georgiev DELCHEV, Ivo Rumenov DOBREV, Mario Rumenov LASKOV, Evgeniy Anastasov IVANOVSKYI, Andrii MONOVSKI, Valentin Konstantinov |
| description | The invention refers to an optical variable device and finds application as a decorative and security element against counterfeiting of documents, securities, goods, etc. It includes a first relief diffractive structure (1) with Fresnel structure of a arbitrary object (3). A second relief diffractive structure (4) is added over the first one. The second relief diffractive structure (4) consists of areas (7) corresponding to the areas with the same colour of the object and consisting of depressions (5), equal or different in shape, size and direction with distance d between them, where 0.150µm ≤d≤ 10µm. The profile of the depressions is made up from 2 to 7 discreet planes (6) with height hi, where 0.02µm≤ hi ≤ 1µm, and in each area (7) the number and the height hi of the planes (6) and the distance d are the same and depend on the colour of the object in the relevant area (7)'. The planes (6) can have a stepped profile. The depressions (5) can be arranged in a two-dimensional matrix М with axes X and Y, located under angle 45о≥β≥135о, wherein 0,150µm≥d≥0,50µm and for each area (7) the distance d and the angle β are the same. |
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A second relief diffractive structure (4) is added over the first one. The second relief diffractive structure (4) consists of areas (7) corresponding to the areas with the same colour of the object and consisting of depressions (5), equal or different in shape, size and direction with distance d between them, where 0.150µm ≤d≤ 10µm. The profile of the depressions is made up from 2 to 7 discreet planes (6) with height hi, where 0.02µm≤ hi ≤ 1µm, and in each area (7) the number and the height hi of the planes (6) and the distance d are the same and depend on the colour of the object in the relevant area (7)'. The planes (6) can have a stepped profile. The depressions (5) can be arranged in a two-dimensional matrix М with axes X and Y, located under angle 45о≥β≥135о, wherein 0,150µm≥d≥0,50µm and for each area (7) the distance d and the angle β are the same.</description><language>spa</language><subject>BOOK COVERS ; BOOKBINDING ; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR ; FILES ; LOOSE LEAVES ; MOVABLE-STRIP WRITING OR READING APPARATUS ; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS ; OPTICS ; PERFORMING OPERATIONS ; PHYSICS ; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES ; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR ; SPECIAL PRINTED MATTER ; TRANSPORTING</subject><creationdate>2021</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20210513&DB=EPODOC&CC=ES&NR=2824779T3$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20210513&DB=EPODOC&CC=ES&NR=2824779T3$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>STOILOV, Georgi Ivanov</creatorcontrib><creatorcontrib>TONCHEV, Dimitar Antonov</creatorcontrib><creatorcontrib>POGAN, Ignat</creatorcontrib><creatorcontrib>BALDZHIEV, Angel Georgiev</creatorcontrib><creatorcontrib>DELCHEV, Ivo Rumenov</creatorcontrib><creatorcontrib>DOBREV, Mario Rumenov</creatorcontrib><creatorcontrib>LASKOV, Evgeniy Anastasov</creatorcontrib><creatorcontrib>IVANOVSKYI, Andrii</creatorcontrib><creatorcontrib>MONOVSKI, Valentin Konstantinov</creatorcontrib><title>Dispositivo variable óptico</title><description>The invention refers to an optical variable device and finds application as a decorative and security element against counterfeiting of documents, securities, goods, etc. It includes a first relief diffractive structure (1) with Fresnel structure of a arbitrary object (3). 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A second relief diffractive structure (4) is added over the first one. The second relief diffractive structure (4) consists of areas (7) corresponding to the areas with the same colour of the object and consisting of depressions (5), equal or different in shape, size and direction with distance d between them, where 0.150µm ≤d≤ 10µm. The profile of the depressions is made up from 2 to 7 discreet planes (6) with height hi, where 0.02µm≤ hi ≤ 1µm, and in each area (7) the number and the height hi of the planes (6) and the distance d are the same and depend on the colour of the object in the relevant area (7)'. The planes (6) can have a stepped profile. The depressions (5) can be arranged in a two-dimensional matrix М with axes X and Y, located under angle 45о≥β≥135о, wherein 0,150µm≥d≥0,50µm and for each area (7) the distance d and the angle β are the same.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BOOK COVERS BOOKBINDING DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR FILES LOOSE LEAVES MOVABLE-STRIP WRITING OR READING APPARATUS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PERFORMING OPERATIONS PHYSICS PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR SPECIAL PRINTED MATTER TRANSPORTING |
| title | Dispositivo variable óptico |
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