CN2042976U - Information-storing system for making security hologram - Google Patents
Information-storing system for making security hologram Download PDFInfo
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- CN2042976U CN2042976U CN 88218978 CN88218978U CN2042976U CN 2042976 U CN2042976 U CN 2042976U CN 88218978 CN88218978 CN 88218978 CN 88218978 U CN88218978 U CN 88218978U CN 2042976 U CN2042976 U CN 2042976U
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- hologram
- information
- optical encoder
- reference beam
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Abstract
The utility model discloses an information-storing system for making security hologram, which relates to a holograph coding technique. The utility model uses an optical encoder to encode reference beam phase and object beam phase and to encode one position or a plurality of relative positions of the encoding reference beam phase. The packing density is enhanced largely, and the efficiency of the hologram security is excellent. The utility model can be widely used for storing, transferring, and reading out the stored data, and can prevent the information leakage caused by being stolen, being translated in secret, or losing the hologram.
Description
The utility model relates to the holograph coding techniques.
The holography storage of general information, it is the Fourier transformation hologram of on a dry plate, noting information with plane reference beams, if this hologram is shone with any beam of laser, just can reproduce institute at once and be stored in information in the hologram, the hologram that therefore this holography is stored does not have confidentiality.United States Patent (USP) (№ in 1978,4,120,559) a kind of experimental system of setting up security information is disclosed, this system adopts the sandwich hologram method, on a dry plate, write down the hologram of a page information earlier, utilize the information of the array element distortion introduction phase change of piezoelectric ceramics scrambler, on second dry plate, note the hologram of this information, if these two holograms are put together, and second hologram kept and the accurate identical relative position of original first hologram, just can reproduce the information of being stored.The deficiency that this system exists is: 1. two of storage information layers of formation of hologram bother, and regulate difficulty during reproduction, and information is read inconvenience.2. store a page information with two layers of hologram, cause the storage density of system little.3. piezoelectric ceramics scrambler processing difficulties, the cost costliness makes piezoelectric ceramics number used in the system limited, and the mutually first number in position is restricted, and system coding randomness is poor, and hologram is maintained secrecy not good enough, and system realizes very difficult.
The purpose of this utility model aims to provide the information storage device of the secret hologram of making a kind of practicality, that easily realize.
The information storage device of making secret hologram adopts laser speckle random phase shift device to be positioned over the optical encoder that constitutes this device on the sextuple adjusting bracket, the PHASE DISTRIBUTION of unit and the space distribution randomness of size and these are distributed in temporal relative stability mutually to utilize the optical encoder position, encode respectively mutually with the object beam position mutually in reference beam position to device, with the Fourier transformation lens position of reference beam is distributed mutually and to carry out Fourier transformation or be imaged onto on the holographic recording medium, a recording medium (dry plate or film) can store a lot of page informations, and the storage density of device is greatly improved.When the secret hologram of the different information of record, optical encoder can be encoded to a position or a plurality of relative position of encoded reference beam position phase, to improve the security performance of information holographic figure.By comprehensive minute adjustment to optical encoder, secret hologram precision in original device of optical encoder and information is resetted, could make things convenient for and clearly read the information that is stored in the hologram, otherwise can only reproduce a slice speckle noise, can not read the information of storage, thereby make the hologram of this information have confidentiality.
The advantage that this system has:
1. store the hologram of a lot of page informations with a recording medium, the storage density of device greatly improves.
2. the change in location that adopts the multiple optics scrambler in reference beam makes the coding randomness of device good to the reference beam phase coding, increased the decoding obstacle to hologram, thereby hologram is secret effective.
3. optical encoder is easy to make, and a plurality of identical optical encoders of also easy making are used for many table apparatus.
4. device fabrication and processing expense is low, realizes easily, and decoding is read conveniently, is storage information, makes the practical device of secret hologram.
Description of drawings:
Fig. 1, the theory diagram of the utility model embodiment.
Fig. 2, the structural drawing of the optical encoder among the utility model embodiment.
The 1-holding frame; 2-random phase shift device; The framework of the sextuple adjusting bracket of 3-; The height of the sextuple adjusting bracket of 4-is regulated turn-knob; The left and right adjusting turn-knob of the sextuple adjusting bracket of 5-; Turn-knob is regulated in the front and back of the sextuple adjusting bracket of 6-; Turn-knob is regulated in the rotation of the sextuple adjusting bracket of 7-.
Fig. 3, the index path of this real new embodiment.
The utility model is described in further detail in conjunction with (accompanying drawing) embodiment:
As Fig. 2: optical encoder (9), (15) are positioned over by a random phase shift device 2 that can be fixed in the holding frame 1 on the framework 3 of sextuple adjusting bracket and constitute.
As Fig. 1, Fig. 3: the light beam that coherent source (1) sends is through collimating apparatus (2), catoptron (3), be divided into two bundle light by beam splitter (4) with light beam, and a branch of is reference beam, and a branch of is object beam.Reference beam through attenuator (5), light filter (6), catoptron (7) enter extender lens (8), reference beam optical encoder (9) is encoded mutually to the reference beam position, its position distributes mutually and is carried out Fourier transformation or be imaged onto holographic dry plate (11) going up as random phase distribution reference beam by lens (10).At record during different hologram, reference beam optical encoder (9) can be made up of with the completing place a plurality of reference beam laser speckle random phase shift devices and a plurality of sextuple adjusting bracket and encodes.Object beam enters through catoptron (12) and expands bundle filtering collimating apparatus (13), after thing information (14) is encoded by the higher object beam optical encoder (15) of resolution, undertaken inciding on the holographic dry plate (or film) (11) that is fixed on the sextuple adjusting bracket (18) behind the Fourier transformation by lens (16), need the information of storage just to be recorded in this holographic dry plate (or film) upward, can obtain the secret hologram of information.If will read the information of being stored, then its hologram is put back in the former storing apparatus, and the sextuple adjusting bracket on adjusting optical encoder and the holographic dry plate, its precision is resetted, and block object beam with light barrier, can on film viewing screen (17), read the information of being stored.The major parameter of each lens of this device, object lens, catoptron is as follows:
Catoptron (3): R=98%; Beam splitter (4): R=50%, t=50%; Attenuator (5) is a variable attenuator; Light filter (6): φ=0.8mm; Catoptron (7): R=98%; Extender lens; (8): the 40X object lens; Lens (10): f=50～100, FTL; Catoptron (12): R=98%; Expand bundle filtering collimating apparatus (13): 40X object lens, f=50; Lens (16): f=50～100, FTL.
Claims (2)
1, makes the information storage device of secret hologram, it is characterized in that optical encoder (9), (15) encoded respectively mutually with the object beam position mutually in the reference beam position of this device, be positioned on the sextuple adjusting bracket by a laser speckle random phase shift device and constitute, and be positioned between lens (8), (10) respectively and thing information (14), between the lens (16).
2, the information storage device of the secret hologram of making as claimed in claim 1, it is characterized in that can adopting the multiple optics scrambler to the optical encoder (9) that a position or a plurality of relative position of encoded reference beam position phase are encoded, it also can be a plurality of that optical encoder (9) can be one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88218978 CN2042976U (en) | 1988-10-26 | 1988-10-26 | Information-storing system for making security hologram |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88218978 CN2042976U (en) | 1988-10-26 | 1988-10-26 | Information-storing system for making security hologram |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2042976U true CN2042976U (en) | 1989-08-16 |
Family
ID=4851372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88218978 Withdrawn CN2042976U (en) | 1988-10-26 | 1988-10-26 | Information-storing system for making security hologram |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2042976U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101310226B (en) * | 2005-10-25 | 2012-06-06 | 富士通株式会社 | Hologram recording device |
-
1988
- 1988-10-26 CN CN 88218978 patent/CN2042976U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101310226B (en) * | 2005-10-25 | 2012-06-06 | 富士通株式会社 | Hologram recording device |
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Legal Events
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| 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 |