CN209266023U - Minimize volume holographicstorage and identifying system - Google Patents
Minimize volume holographicstorage and identifying system Download PDFInfo
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- CN209266023U CN209266023U CN201821717659.9U CN201821717659U CN209266023U CN 209266023 U CN209266023 U CN 209266023U CN 201821717659 U CN201821717659 U CN 201821717659U CN 209266023 U CN209266023 U CN 209266023U
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Abstract
The utility model proposes body miniaturization volume holographicstorage and identifying systems, it is related to holographic technique field, including laser, the light that laser projects takes in polarization beam splitter prism after the first half-wave plate, forms the orthogonal polarised light in two beam polarization directions, respectively as Object light wave and reference light wave, Object light wave passes through the first fast intake space optical modulator behind the door, is placed with random phase plate behind spatial light modulator, then Object light wave takes in storage crystal after the first reflecting mirror and the first lens；Reference light wave takes in the second half-wave plate fastly by second behind the door, then successively takes in the second lens, the second reflecting mirror, the third lens, finally takes in storage crystal, and the other side of storage crystal is equipped with CCD, the 4th lens are equipped between CCD and storage crystal.The utility model keeps system more compact, realizes quick storage record.
Description
Technical field
The utility model relates to holographic technique field, especially a kind of miniaturization volume holographicstorage and identifying system.
Background technique
Volume holographic identification technology is connected closely with volume holographicstorage technology.Just because of the large capacity of volume holographicstorage
Feature just creates the advantage of the fast parallel comparison of volume holographic identification technology.In 1963, American scientist Pieter Jvan
Heerden did not at that time produce any use with regard to it is proposed that carry out the concept of data storage using holographic technique
Device.Van Heerden once original idea give three-dimensional optical storage theoretical limit.
With the discovery of photorefractive effect, high quality photorefractive material is succeeded in developing, spatial light modulator SLM and CCD
Photoelectric detection instrument is succeeded in developing, and enables the optical volume holographic memory technology of large capacity obtain great promotion, it is made to have reality
With the possibility of change.Although volume holographic image identification is studied by domestic research group, domestic research mostly base
Based on the optical platform in laboratory, lack the invention for being detached from laboratory.
Utility model content
The utility model provides a kind of miniaturization volume holographicstorage and identifying system, keeps system more compact, realizes quick
Storage record.
The technical solution of the utility model is as follows:
A kind of miniaturization volume holographicstorage and identifying system, including laser, the light that laser projects is by the first half
After wave plate, polarization beam splitter prism is taken in, the orthogonal polarised light in two beam polarization directions is formed, respectively as Object light wave and reference light
Wave, Object light wave pass through the first fast intake space optical modulator behind the door, are placed with random phase plate behind spatial light modulator, then
Object light wave takes in storage crystal after the first reflecting mirror and the first lens；Reference light wave is by the second fast intake behind the door the second half
Then wave plate successively takes in the second lens, the second reflecting mirror, the third lens, finally take in storage crystal, storage crystal it is another
Side is equipped with CCD, and the 4th lens are equipped between CCD and storage crystal.
Preferably, the laser is diode pumping solid laser, wavelength is 532nm.
Preferably, the storage crystal is the lithium niobate for mixing iron.
Preferably, the CCD camera uses MTV-1881EX, signal-to-noise ratio 48dB.
Preferably, the random phase plate ancient times on translation stage, and keep it parallel with spatial light modulator surface.
A kind of miniaturization volume holographicstorage provided by the utility model and identifying system, the beneficial effect is that: make system
It is more compact, realize quick storage record.
Detailed description of the invention
Fig. 1 is the light path schematic diagram of the utility model miniaturization volume holographicstorage and identifying system.
Specific embodiment
To further illustrate each embodiment, the utility model is provided with attached drawing.These attached drawings are in the utility model discloses
A part of appearance mainly to illustrate embodiment, and can cooperate the associated description of specification former come the running for explaining embodiment
Reason.Cooperation refers to these contents, and those of ordinary skill in the art will be understood that other possible embodiments and sheet are practical new
The advantages of type.Component in figure is not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.
Now in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in Figure 1, a kind of miniaturization volume holographicstorage provided in this embodiment and identifying system, including laser 1, swash
The light that light device 1 projects takes in polarization beam splitter prism 3 after the first half-wave plate 2, forms the orthogonal polarization in two beam polarization directions
Light, respectively as Object light wave and reference light wave, Object light wave intake space optical modulator 5, space light modulation after the first shutter 4
Random phase plate 6 is placed with behind device 5, then Object light wave takes in storage crystal 9 after the first reflecting mirror 7 and the first lens 8；
Reference light wave takes in the second half-wave plate 11 after the second shutter 10, then successively takes in the second lens 12, the second reflecting mirror
13, the third lens 14, finally take in storage crystal 9, and the other side of storage crystal 9 is equipped with CCD 15, CCD 15 and storage crystal 9
Between be equipped with the 4th lens 16.
In this implementation, laser used is diode pumping solid laser, and wavelength is 532nm, and storage crystal is to mix
The lithium niobate of iron, the first half-wave plate and the second half-wave plate are used cooperatively with polarization beam splitter prism, and object light and reference light is adjusted
Beam intensity ratio, to improve hologram quality.CCD camera uses MTV-1881EX, signal-to-noise ratio 48dB that random phase plate ancient times exist
On translation stage, and keep it parallel with spatial light modulator surface.Under normal circumstances, the phase mehtod of random phase plate is considered as
It is a constant random process, when the distance between different zones are greater than the half-breadth of its auto-correlation function, these regions
Position is mutually considered nearly orthogonal.
This system uses hybrid multiplex technology component volume holographic image library, which is 4076 width images, will deposit
The image of storage is divided into n group, correspondingly generates the random phase mask of n kind, in storage, is multiplexed by two dimension angular i-th group
Figure is stored in picture library, and different groups' repetitions are same angular multiplexed, makes different groups of mutual point location in the same position of CCD
On；Right it is extreme, if the phase mask with i-th group modulates object light, only i-th group can export effective reference point.Two
Different can guarantee that other group outputs are 0 with the nearly orthogonal between note phase mask, reduce the interference of other groups.
Although specifically showing and describing the utility model in conjunction with preferred embodiment, those skilled in the art is answered
This is understood, in the spirit and scope for not departing from the utility model defined by the appended claims, in form and details
On the utility model can be made a variety of changes, be the protection scope of the utility model.
Claims (5)
1. a kind of miniaturization volume holographicstorage and identifying system, which is characterized in that including laser, the light that laser projects is passed through
After crossing the first half-wave plate, take in polarization beam splitter prism, form the orthogonal polarised light in two beam polarization directions, respectively as Object light wave and
Reference light wave, Object light wave pass through the first fast intake space optical modulator behind the door, are placed with random phase behind spatial light modulator
Plate, then Object light wave takes in storage crystal after the first reflecting mirror and the first lens；Reference light wave is taken the photograph behind the door fastly by second
Enter the second half-wave plate, then successively take in the second lens, the second reflecting mirror, the third lens, finally take in storage crystal, storage is brilliant
The other side of body is equipped with CCD, and the 4th lens are equipped between CCD and storage crystal.
2. a kind of miniaturization volume holographicstorage according to claim 1 and identifying system, which is characterized in that the laser
For diode pumping solid laser, wavelength is 532nm.
3. a kind of miniaturization volume holographicstorage according to claim 2 and identifying system, which is characterized in that the storage is brilliant
Body is the lithium niobate for mixing iron.
4. a kind of miniaturization volume holographicstorage according to claim 2 and identifying system, which is characterized in that the CCD phase
Machine uses MTV-1881EX, signal-to-noise ratio 48dB.
5. a kind of miniaturization volume holographicstorage according to claim 2 and identifying system, which is characterized in that the random phase
Position plate ancient times keep it parallel with spatial light modulator surface on translation stage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821717659.9U CN209266023U (en) | 2018-10-23 | 2018-10-23 | Minimize volume holographicstorage and identifying system |
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| CN201821717659.9U CN209266023U (en) | 2018-10-23 | 2018-10-23 | Minimize volume holographicstorage and identifying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112698562A (en) * | 2020-12-31 | 2021-04-23 | 深圳市麓邦技术有限公司 | Anti-counterfeiting manufacturing system and method thereof |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112698562A (en) * | 2020-12-31 | 2021-04-23 | 深圳市麓邦技术有限公司 | Anti-counterfeiting manufacturing system and method thereof |
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