CN1134005A - Apparatus for mfg. display type holographic cipher by Moire technique - Google Patents
Apparatus for mfg. display type holographic cipher by Moire technique Download PDFInfo
- Publication number
- CN1134005A CN1134005A CN 96102653 CN96102653A CN1134005A CN 1134005 A CN1134005 A CN 1134005A CN 96102653 CN96102653 CN 96102653 CN 96102653 A CN96102653 A CN 96102653A CN 1134005 A CN1134005 A CN 1134005A
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- light
- holographic
- holographic plate
- thing
- hologram
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Abstract
In the apparatus laser beam is used to generate encrypted hologram for antiforge. A laser beam goes through beam splitter. Its object light goes through reflector, filter, collimating lens to form parallel light, frosted glass to form diffused light and black-white transparent plate and finally to holographic plate while its reference light goes through reflector, filter, and collimating lens, and finally to holographic plate to form encrypted hologram by interference. Different object has different encrypted holograms, which are only seen as Moire one and can not be used to determine real object, so having strong antiforge power.
Description
This device relates to a kind of laser of using and obtains the device that hologram is encrypted.
Since invention seventies moulding holographic technology, embossed hologram is applied in all kinds of certificates and the product with regard to being made into anti-counterfeiting mark.Yet because popularizing of common rainbow hologram manufacturing technology and developing rapidly of embossed hologram manufacturer, the phenomenon of imitated holographic anti-counterfeiting label is more and more serious, and hologram marking itself has also become by imitated article.
The CN2201684Y patent disclosure a kind of two dimension rainbow hologram producing device that glitters, the output of laser instrument is divided into thing light and reference light through reflector group and spectroscope, reference light after expanding bundle and filtering direct projection to mask and holographic plate; Thing light is earlier restrainted into hot spot and is thrown to frosted glass through expansion, is mapped to mask and holographic plate again.
The CN2201685Y patent disclosure one step of a kind of single beam copy legal system make the device of rainbow hologram, the output of laser instrument is the direct projection mask after expanding the band wave filter, mask, rainbow mother matrix and holographic plate three are fixed on the dry plate frame in regular turn.
The CN2210407Y patent disclosure a kind of filming apparatus of multi-faceted holo-rainbow ornament materials mother matrix, the output of laser instrument becomes two bundles through beam split, be mapped on the mask respectively after reflection again through expansion bundle, filtering, and with same incident angle, holographic plate and mask fixedly are on the plate rack.
Said apparatus all can obtain respond well hologram, but does not have encryption measures.Manifest the type holographic cipher though utilize the means of optics Fourier transformation to make, holographic recording is difficult for realizing that cipher pattern is not abundant.
Purpose of the present invention aims to provide a kind of anti-counterfeit capability that improves hologram marking, can make the device that manifests the type holographic cipher.
The present invention includes laser instrument, beam splitter, catoptron, expansion bundle wave filter, collimation lens, frosted glass, have the periodically black and white transparency film and the holographic plate of pattern.The light path setting of each parts is that the laser beam of laser instrument output is divided into thing light and reference light two-beam through beam splitter, thing light is earlier through catoptron, again after expanding the bundle wave filter, the directional light that is formed by collimation lens forms diffused light through frosted glass, and the black and white transparency film of pattern arrives on the holographic plate through having periodically again; Reference light is earlier through catoptron, and after expanding the bundle wave filter, the directional light that is formed by collimation lens arrives on the holographic plate again, and thing light and reference light are interfered on holographic plate and be recorded.
The selection of laser instrument is decided by the model of employed holographic plate.
From the optics Mohr theory as can be known, two roughly the same patterns of period of change overlap and the angle that staggers, and will form Moire pattern.Moire pattern has following characteristics:
1) shape of Moire pattern may differ widely with two periodicity patterns that constitute it;
2) see Mohr's circle, be difficult to judge the shape of two patterns that constitute it.
According to above characteristic, select two periodically patterns, they are overlaped and stagger with a certain suitable angle, then the Mohr's circle that constitutes is recorded on the hologram marking, promptly form password.In the making of common hologram, the pattern of hologrm reconstruction and the used thing striking resemblances of when record are as long as adopt same thing just can make same hologram pattern.And the cipher pattern of the present invention's record, thing used during but with this pattern of record is different.Because what the imitated person of attempt saw when hologram marking is observed password is Mohr's circle, can not judge the thing that constitutes this pattern, therefore can't copy, anti-counterfeit capability is strong.In addition, manifest the type holographic cipher with the means making that utilizes the optics Fourier transformation and compare, light path setting of the present invention is simpler, the easier realization of holographic recording, and cipher pattern is abundanter.
Fig. 1 is provided with figure for the light path of this device.
In the drawings, whole optical path is a Fei Nieer hologram record light path, device is by laser instrument (1), beam splitter (2), catoptron (3,4), expand bundle wave filter (5,6), collimation lens (7,8), frosted glass (9), have the periodically black and white transparency film (10,11) and the holographic plate compositions such as (12) of pattern.The light path of whole device and the course of work are divided into two bundles for the laser beam from laser instrument (1) output through beam splitter (2), a branch of as thing light through catoptron (3) with after expanding bundle wave filter (5), form directional light by collimation lens (7), form diffused light through black and white transparency film (10 by frosted glass (9) again, 11) arrive on the holographic plate, owing on two slidies the periodic patterns that designs is in advance arranged, when laser radiation has just produced Mohr's circle during to them, this Mohr's circle just becomes the thing of Fei Nieer hologram; The light beam of another bundle process beam splitter (2) forms directional light through catoptron (4) with after expanding bundle wave filter (6) by collimation lens (8), is mapped on the holographic plate as reference light.Thing light and reference light are interfered on holographic plate and just Mohr's circle have been write down time.If remembered the pattern of hologram marking on the holographic plate, behind this device recording, Mohr's circle just is produced in the hologram marking.
Claims (1)
1. make the device that manifests the type holographic cipher with Moire technique, it is characterized in that comprising laser instrument, beam splitter, catoptron, expansion bundle wave filter, collimation lens, frosted glass, have the periodically black and white transparency film and the holographic plate of pattern, the light path setting of each parts is that the laser beam of laser instrument output is divided into thing light and reference light two-beam through beam splitter, thing light is earlier through catoptron, again after expanding the bundle wave filter, the directional light that is formed by collimation lens forms diffused light through frosted glass, and the black and white transparency film of pattern arrives on the holographic plate through having periodically again; Reference light is earlier through catoptron, and after expanding the bundle wave filter, the directional light that is formed by collimation lens arrives on the holographic plate again, and thing light and reference light are interfered on holographic plate and be recorded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96102653 CN1088879C (en) | 1996-02-05 | 1996-02-05 | Apparatus for mfg. display type holographic cipher by Moire technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96102653 CN1088879C (en) | 1996-02-05 | 1996-02-05 | Apparatus for mfg. display type holographic cipher by Moire technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1134005A true CN1134005A (en) | 1996-10-23 |
| CN1088879C CN1088879C (en) | 2002-08-07 |
Family
ID=5117665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96102653 Expired - Fee Related CN1088879C (en) | 1996-02-05 | 1996-02-05 | Apparatus for mfg. display type holographic cipher by Moire technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1088879C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6351537B1 (en) | 1998-10-05 | 2002-02-26 | 3M Innovative Properties Company | Verifiable holographic article |
-
1996
- 1996-02-05 CN CN 96102653 patent/CN1088879C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6351537B1 (en) | 1998-10-05 | 2002-02-26 | 3M Innovative Properties Company | Verifiable holographic article |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1088879C (en) | 2002-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |