CN1110012C - Device for making hidden holographic cryptogram using liht Moire effect - Google Patents
Device for making hidden holographic cryptogram using liht Moire effect Download PDFInfo
- Publication number
- CN1110012C CN1110012C CN 96100427 CN96100427A CN1110012C CN 1110012 C CN1110012 C CN 1110012C CN 96100427 CN96100427 CN 96100427 CN 96100427 A CN96100427 A CN 96100427A CN 1110012 C CN1110012 C CN 1110012C
- Authority
- CN
- China
- Prior art keywords
- black
- pattern
- hectograph
- bundle
- present
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Holo Graphy (AREA)
Abstract
The present invention relates to a device, which applies lasers for obtaining the encryption of a hologram. The light beam of a laser is radiated by a beam extended filter on a black-white transparent piece with patterns. The black-white transparent piece is in close contact with a lithographic hectograph. The light beam which is permeated the black-white transparent piece is radiated to the lithographic hectograph. The present invention can be used for easily making concealed cipher codes and decoding plates. Because the present invention can not be sawn by naked eyes, falsifiers can not carry out imitation. Complicated light paths are not needed during decoding. The numerous concealed cipher codes and the decoding plates can be made. Thus, the detection to the truth of certificates can be conveniently carried out. The present invention is used for making and detecting the important certificates, etc.
Description
The present invention relates to a kind of laser of using and obtain the device that hologram is encrypted.
Since invention seventies moulding holographic technology, embossed hologram is applied in the product of all kinds of certificates with regard to being made into anti-counterfeiting mark.
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 reflection group and spectroscope, reference light after expanding bundle and filtering direct projection to mask and holographic plate; Thing light is 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 bundle 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, respectively after reflection again through expanding bundle, filtering and being mapped on the mask with same incident angle.
Said apparatus all can obtain respond well hologram, but does not have encryption measures.Though utilize the means of optics Fourier transformation can make holographic cipher, be generally and manifest type." making latent type holographic cipher on certificate forges with imitative " is that a kind of of people craves for for a long time." hidden-type password " refers to usually with the naked eye and can't see, and the password that must just can see with any special measures, this password be well suited for be produced on I.D., passport, bank card etc. must be through on the important certificate of a certain department reviews.The Goodman of the U.S. teaches the technology that once proposed with " aberration medium compensation aberration " and realizes the holographic encryption of hidden-type in " paying upright leaf optics introduction " book, though the theoretical proof of the method is very perfect, the difficulty but decode procedure is but quite complicated is so be difficult to use in practice.
Purpose of the present invention aims to provide a kind of device of making the making hidden-type holographic cipher easy, that anti-counterfeit capability is strong.
The present invention includes laser instrument, be used to export laser beam; Expand the bundle wave filter, be used for laser beam enlarging bundle and filtering, the output single beam laser instrument output; Black and white transparency film with pattern, said pattern are a group in pre-two groups of periodically variable patterns that design, and it is made by hologram recording method; The photoetching hectograph, said photoetching hectograph is a phase-type; The light path setting of each parts be from the laser beam of laser instrument output after expanding the bundle wave filter and expanding bundle and filtering, be mapped on the black and white transparency film with pattern, black and white transparency film closely contacts with the photoetching hectograph, and is last, the light beam that sees through black and white transparency film is incident upon the photoetching hectograph, promptly finishes its record and makes.
From the optics Mohr theory as can be known, the roughly the same periodically variable pattern in any two fringe spacings overlaps and the angle that staggers mutually, will form Mohr's circle.Different periodicity patterns or the different angles that staggers will form different Mohr's circles.Select two patterns, with one of them with holographic method make the embossed hologram thermoprint on certificate as password; Another pattern also is recorded on the transparent panel as decoding deck with holographic method, preserves by certificate examination department.When examination of document, audit crew just can be seen the Mohr's circle of expection as long as decoding deck is placed on certificate to be had the local of password and turn over an angle.If do not have password or password difference on the certificate, just can't see the Mohr's circle of expection, confirm that promptly certificate copys.
The record of holographic cipher and decoding deck all with photoresist the version.The photoetching hectograph is a phase-type, if with single beam pattern is copied on the photoetching hectograph, naked eyes also be can't see the existence of pattern, have only when two patterns are overlapping and just can see Mohr's circle, so the imitator can't know the pattern of password and decoding deck, also just can't copy.And when decoding needn't complicated light path, and can make numerous, so can test to the true and false of certificate with the place at any time easily.
Fig. 1 is provided with figure for the light path of this device.
In the drawings, provide the holographic recording optical path setting of this device, whole device is made of laser instrument 1, expansion bundle wave filter 2, the black and white transparency film 3 with pattern and photoetching hectograph 4.The structure of this device is same for the record of holographic cipher and decoding deck, and just the pattern that adopts on the slide may be different.In this device, slide must closely contact with the photoetching hectograph.If the photoetching hectograph of record password has had the pattern of certain hologram marking, then password can be recorded certain position in the hologram marking, version is made embossed hologram with photoresist then.The photoetching hectograph of carrying recorded decoding plate pattern is exactly a decoding deck after developing, and needn't carry out any conversion again.
Claims (1)
1, utilize the light Moire effect to make the device of hidden-type holographic cipher, it is characterized in that comprising:
Laser instrument is used to export laser beam;
Expand the bundle wave filter, be used for laser beam enlarging bundle and filtering, the output single beam laser instrument output;
Black and white transparency film with pattern, said pattern are a group in pre-two groups of periodically variable patterns that design, and it is made by hologram recording method;
The photoetching hectograph, said photoetching hectograph is a phase-type; The light path setting of each parts be from the laser beam of laser instrument output after expanding the bundle wave filter and expanding bundle and filtering, be mapped on the black and white transparency film with pattern, black and white transparency film closely contacts with the photoetching hectograph, the light beam that sees through black and white transparency film is incident upon the photoetching hectograph.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 96100427 CN1110012C (en) | 1996-02-05 | 1996-02-05 | Device for making hidden holographic cryptogram using liht Moire effect |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 96100427 CN1110012C (en) | 1996-02-05 | 1996-02-05 | Device for making hidden holographic cryptogram using liht Moire effect |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1153359A CN1153359A (en) | 1997-07-02 |
CN1110012C true CN1110012C (en) | 2003-05-28 |
Family
ID=5116599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 96100427 Expired - Fee Related CN1110012C (en) | 1996-02-05 | 1996-02-05 | Device for making hidden holographic cryptogram using liht Moire effect |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN1110012C (en) |
-
1996
- 1996-02-05 CN CN 96100427 patent/CN1110012C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN1153359A (en) | 1997-07-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5920058A (en) | Holographic labeling and reading machine for authentication and security applications | |
US4921278A (en) | Identification system using computer generated moire | |
CN1399764B (en) | Authentication system and method | |
US5483363A (en) | Security device | |
JP4429527B2 (en) | Verifiable holographic article | |
EA017886B1 (en) | Holographic security device | |
EP0802462A1 (en) | A method of making two cards inter-lock antiforgery marks and apparatus for inspection thereof | |
KR20020027485A (en) | Secure document, system for making same and system for reading said document | |
US5499116A (en) | Encoded hologram for producing a machine readable image and a human readable image | |
JPH05188845A (en) | Hologram | |
Aggarwal et al. | Concealed moiré pattern encoded security holograms readable by a key hologram | |
JP5674471B2 (en) | Security document with diffractive surface structure | |
JPH08227263A (en) | Master hologram for production of unreproducible hologram | |
US7710623B2 (en) | Security hologram, method of recording same, and method of using same wherein the holographic imaging includes a single coherent beam of electromagnetic radiation in combination with a Lloyd's mirror to provide both reference and object beams | |
JPH09190149A (en) | Production of non-duplicable hologram having characteristic point of genuine object and reader for checking authenticity | |
US5026132A (en) | Method of producing and reproducing holograms | |
CN2258303Y (en) | Device for making concealed holographic cipher using light Mohr effect | |
CN1110012C (en) | Device for making hidden holographic cryptogram using liht Moire effect | |
US20070103746A1 (en) | Security hologram and associated methods of use and of making | |
JP3365645B2 (en) | Hologram, method for producing hologram, and method for confirming using hologram | |
JP3563774B2 (en) | Information recording medium | |
JP3912700B2 (en) | Composite hologram | |
US20080137160A1 (en) | Security Holograms | |
EP3698215A1 (en) | Holograms | |
RU2165360C1 (en) | Method for identification of authenticity of objects |
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 | ||
REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1036168 Country of ref document: HK |
|
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 |