CN106527093A - Nonlinear frequency doubling and polarization characteristic-based hologram multiplexing method and system - Google Patents
Nonlinear frequency doubling and polarization characteristic-based hologram multiplexing method and system Download PDFInfo
- Publication number
- CN106527093A CN106527093A CN201611220799.0A CN201611220799A CN106527093A CN 106527093 A CN106527093 A CN 106527093A CN 201611220799 A CN201611220799 A CN 201611220799A CN 106527093 A CN106527093 A CN 106527093A
- Authority
- CN
- China
- Prior art keywords
- micro
- nano structure
- frequency
- different
- spatial transmission
- 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.)
- Granted
Links
- 230000010287 polarization Effects 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002086 nanomaterial Substances 0.000 claims abstract description 97
- 230000005540 biological transmission Effects 0.000 claims description 94
- 238000005286 illumination Methods 0.000 claims description 62
- 241000219739 Lens Species 0.000 claims description 8
- 210000000695 crystalline len Anatomy 0.000 claims description 8
- 238000009877 rendering Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 208000035126 Facies Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 210000000887 face Anatomy 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
- G03H1/2645—Multiplexing processes, e.g. aperture, shift, or wavefront multiplexing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
- G03H1/2645—Multiplexing processes, e.g. aperture, shift, or wavefront multiplexing
- G03H2001/267—Polarisation multiplexing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Holo Graphy (AREA)
Abstract
The invention provides a hologram multiplexing method and system. The method comprises the following steps of (S1) obtaining phase information of each pixel of each hologram when different holograms are reproduced at different frequencies on the basis of a micro-nano structure; (S2) carrying out corresponding phase encoding modulation on phase modulation units of the micro-nano structure on the basis of the phase information; and (S3) making incident light in different polarization states enter the encoded micro-nano structure and obtaining reproduced images of different holograms. Phase encoding modulation is carried out on the phase modulation unit of the micro-nano structure by using a frequency doubling characteristic of a super-surface material of the micro-nano structure and different phase modulation formed by polarity corresponding relationships at different frequency doubling to obtain reproduction of multiple holograms; and the influence of background noise of the reproduction result is eliminated through image filtering. In addition, one complex amplitude modulation unit is formed through combining two phase modulation units to modulate pixel elements, thereby obtaining multi-image complex amplitude-modulated holograms.
Description
Technical field
The present invention relates to holographic technique field, more particularly, to a kind of based on the complete of frequency doubling non-linear and polarization characteristic
Breath image multiplexing method and system.
Background technology
At present, an important research direction in holographic technique is calculated, is the super surface constituted with micro-nano structure
(metasurface) realize that hologram image shows.It is this to calculate the holographic linear characteristic being achieved in that according to micro-nano structure,
Coding and sorting order carried out to the position of hologram mutually and structure by including nano-antenna, sub-wavelength magnitude split ring and other micro-nano structure
Into super surface, so as to the dipole array by being formed under incident light action realizes Spatial transmission to incident illumination.
Holographic display is carried out using the linear characteristic of micro-nano structure, can be encoded by the structure to micro-nano unit, shape
Holographic display is realized into the modulation of para-position phase.But to realize that the holographic of many images shows by linear micro-nano structure, non-targeted
Image can be formed background noise when target image reappears, and affect the signal to noise ratio of image reproduction.
A kind of current employing nonlinear material of having researched and proposed realizes the holographic method for showing of many images, with single micro-
Holographic dry plate of receiving can reappear three holograies, but its reproduction image quantity, and only realize the modulation of a phase in studying,
The modulation of complex amplitude cannot be realized.
The content of the invention
The present invention provide it is a kind of overcome the problems referred to above or solve the above problems at least in part based on frequency doubling non-linear
And the hologram image multiplexing method and device of polarization characteristic.
According to an aspect of the present invention, there is provided a kind of hologram image multiplexing method, including：
S1, based on micro-nano structure, acquisition reappears the every of every width hologram image during different hologram images on a different frequency
The phase information of individual pixel；
S2, based on the phase information, carries out corresponding phase coding tune to the Spatial transmission unit of the micro-nano structure
System；
S3, with the micro-nano structure after the incident light beam strikes coding of different polarization states, obtains the reproduction of different hologram images
Image.
Further, the S1 is further included：
S1.1, determines the incident light frequency of the micro-nano structure；
S1.2, calculates the emergent light of the micro-nano structure in fundamental frequency and the frequency multiplication of the incident light frequency at least one respectively
The phase information of each pixel of width hologram image.
Specifically, the S2 is further included：
In units of the single Spatial transmission unit of the micro-nano structure, according to the phase information to the Spatial transmission
Unit carries out phase coding, realizes Spatial transmission；Or
In units of each two Spatial transmission unit of the micro-nano structure, institute's rheme is mutually adjusted according to the phase information
Unit processed carries out phase coding, realizes double Spatial transmissions.
Further, the S3 is further included：
S3.1, based on the incident light frequency, obtains rotatory polarization or line polarisation incident illumination；
S3.2, based on the rotatory polarization, respectively with right-handed rotation and/or the incident micro-nano structure of left-handed rotation, obtains several
The reproduction image of hologram image；Or
Based on line polarisation, respectively with x directions line polarisation and/or the incident micro-nano structure of y directions line polarisation, several are obtained
The reproduction image of hologram image.
Specifically, the S1.2 is further included：
When incident illumination is rotatory polarization right-handed rotation, 2 θ of geometry texture of the left-handed component during acquisition emergent light fundamental frequency,
And/or 3 θ of geometry texture of the geometry texture θ and left-handed component of right hand component during two frequency multiplication of emergent light；And/or
When incident illumination is rotatory polarization left-handed rotation, -2 θ of geometry texture of the left-handed component during acquisition emergent light fundamental frequency,
And/or -3 θ of geometry texture and the geometry texture-θ of left-handed component of right hand component during two frequency multiplication of emergent light；
Wherein, θ is the azimuth of the Spatial transmission unit of the micro-nano structure.
Specifically, the S1.2 is further included：
When incident illumination is x directions line polarisation, the geometry texture 2 of the y directions line polarisation during acquisition emergent light fundamental frequency
θ, and/or the geometry texture θ of the 3 θ and x directions line polarisation of geometry texture of y directions line polarisation during two frequency multiplication of emergent light；
And/or
When incident illumination is y directions line polarisation, the geometry texture -2 of the x directions line polarisation during acquisition emergent light fundamental frequency
θ, and/or -3 θ of geometry texture of the geometry texture-θ and x direction line polarisation of y directions line polarisation during two frequency multiplication of emergent light；
Wherein, θ is the azimuth of the Spatial transmission unit of the micro-nano structure.
Specifically, described in the S2, double Spatial transmissions include：
When incident illumination is rotatory polarization right-handed rotation, 2 θ of geometry texture of the left-handed component during acquisition emergent light fundamental frequency1、
2θ2；And/or the geometry texture θ of right hand component during two frequency multiplication of emergent light1、θ2And 3 θ of geometry texture of left-handed component1、3
θ2；
Wherein, θ1And θ2It is divided into the azimuth of two Spatial transmission units of the complex amplitude modulating unit.
Specifically, described in the S2, double Spatial transmissions include：
When incident illumination is x directions line polarisation, the geometry texture 2 of the y directions line polarisation during acquisition emergent light fundamental frequency
θ1、2θ2, and/or 3 θ of geometry texture of y directions line polarisation during two frequency multiplication of emergent light1、3θ2And x directions line polarisation is several
What phase θ1、θ2；
Wherein, θ1And θ2It is divided into the azimuth of two Spatial transmission units of the complex amplitude modulating unit.
According to another aspect of the present invention, a kind of hologram image multiplexer is also provided, described device includes going here and there successively
The super surface of the LASER Light Source of connection, the polarizer, convex lenss, micro-nano structure, analyzer and filter plate；Described device is used for realizing that line is inclined
The multiplexing of Spatial transmission hologram image or the multiplexing of complex amplitude hologram image during light incident illumination；Or
LASER Light Source that described device includes being sequentially connected in series, the polarizer, quarter wave plate, convex lenss, the super surface of micro-nano structure,
Quarter wave plate, analyzer and filter plate；Described device be used for the multiplexing of Spatial transmission hologram image when realizing rotatory polarization incident illumination or
Complex amplitude hologram image is multiplexed.
According to an aspect of the present invention, a kind of hologram image multiplex system is also provided, including：
Phase information module is obtained, for based on micro-nano structure, acquisition reappears different hologram images on a different frequency
When every width hologram image each pixel phase information；
Phase coding modulation module, for based on the phase information, entering to the Spatial transmission unit of the micro-nano structure
The corresponding phase coding modulation of row；
Holographic multiplexing Rendering module, for the micro-nano structure after the incident light beam strikes coding with different polarization states, obtains not
The reproduction image of same hologram image.
The application proposes a kind of hologram image multiplexing method and system based on frequency doubling non-linear and polarization characteristic, by fortune
The difference of the Spatial transmission formed with polarity corresponding relation under the SHG properties of the super surfacing of micro-nano structure, and different frequencys multiplication,
Phase coding modulation is carried out to the Spatial transmission unit of micro-nano structure, and obtains the reproduction of several hologram images；Sieved by image
Choosing eliminates the impact of the background noise of reproduction result.Additionally, combine to form a complex amplitude by two Spatial transmission units adjusting
Unit processed comes modulated pixels unit, carries out nonlinear complex amplitude modulation, obtains many image complex amplitudes and modulates hologram.
Description of the drawings
Fig. 1 is a kind of hologram image multiplexing method flow chart of the invention；
Fig. 2 is micro-nano structure embodiment schematic diagram of the present invention；
Fig. 3 is a kind of hologram image multiplexing method embodiment schematic diagram of the invention；
Hologram image multiplexer schematic diagram when Fig. 4 is incident ray polarisation of the present invention；
Hologram image multiplexer schematic diagram when Fig. 5 is incident illumination rotatory polarization of the present invention；
Fig. 6 is a kind of hologram image multiplex system schematic diagram of the invention.
Description of reference numerals
1st, Spatial transmission unit, 2, micro-nano structure, 3, incident illumination, 4, emergent light, 5, different holograies, 6, laser light
Source, 7, the polarizer, 8, quarter wave plate, 9, convex lenss, 10, quarter wave plate, 11, analyzer, 12, filter plate.
Specific embodiment
With reference to the accompanying drawings and examples, the specific embodiment of the present invention is described in further detail.Hereinafter implement
Example is for illustrating the present invention, but is not limited to the scope of the present invention.
Hologram image multiplexing method and system of the present invention based on frequency doubling non-linear and polarization characteristic, it is considered to when incident illumination enters
It is mapped on the nano-antenna unit of the micro-nano structure that azimuth is θ, emergent light can be made to form the geometry texture modulation that size is 2 θ；
Encoded with this every phase modulating unit to micro-nano structure, just can realize the reproduction of phase hologram.
Simultaneously when calculating holographic, using the nonlinear characteristic of micro-nano structure realize the multiplexing to incident illumination and to multiple figures
As carrying out holographic reproduction.
According to the nonlinear characteristic of micro-nano structure, polarization intensity P meets formula with external electric field E：
Wherein, ε0For permittivity of vacuum, χ(n)For the n rank tensors of polarizability, special, χ(1)For linear polarization rate.Thus
Understand, produce polarity effect after being incident to micro-nano structure under incident illumination different polarization and obtain different components, at different levels polarization intensities
Meet：
Wherein, n=1,2,3 ...,For incident optical signal.Thus, producing electric field frequency at different levels times is
There is frequency multiplication in n times of incident electric fields frequency, emergent light.
Wherein, the ultimate principle that Spatial transmission is linear modulation is carried out using the fundamental component of n=1.Non-linear modulation
Can be by the emergent light optical wavelength after the filter plate used in reproduction light path is to carrying out different multiple-frequency modulations from conventional linear modulation
Selected and realized.
According to non-linear modulation principle, a micro-nano structure is that a Spatial transmission unit has not under the conditions of different frequencys multiplication
Same modulation result.By taking Spatial transmission as an example, it is micro-nano that identical micro-nano structure can produce size to the emergent light of different frequencys multiplication
The Spatial transmission result of structure direction angle different multiples.
The result produced for the different Spatial transmissions of same micro-nano structure under different frequencys multiplication is compiled to hologram image
Code, just can realize same frequency incident illumination, the holographic reproduction of the different images under different outgoing light frequencies.
As different images are encoded on a different frequency, a certain reproduction reproduced under light frequency can be obtained by filtering
Picture, for realizing holographic display result compared to linear modulation, is largely disappeared based on the micro-nano hologram of nonlinear characteristic
Except the impact of background noise.
As shown in figure 1, a kind of hologram image multiplexing method, including：
S1, based on micro-nano structure, acquisition reappears the every of every width hologram image during different hologram images on a different frequency
The phase information of individual pixel；
S2, based on the phase information, carries out corresponding phase coding tune to the Spatial transmission unit of the micro-nano structure
System；
S3, with the micro-nano structure after the incident light beam strikes coding of different polarization states, obtains the reproduction of different hologram images
Image.
For non-linear micro-nano structure, its dipole moment can be decomposed in two faces and rotate pole span (being represented by σ and-σ respectively).
Therefore, two polarization intensity components are represented by：
Wherein, azimuths of the θ for micro-nano modulating unit.It follows that in the n harmonics emergent light investigated and incident illumination
When polarization state property is different, the geometry texture of (n-1) σ θ can be introduced；When polarization state property is identical, then the several of (n+1) σ θ can be introduced
He Weixiang.It follows that working as the polarized light phase incided on micro-nano modulated structure simultaneously as the polarization of non-linear micro-nano structure
Step response, the azimuth of same modulating unit can form different Spatial transmission results in the emergent light of different frequency.
When being encoded, due to n θ and 2 π+n θ, -2 π+n θ, such as θ is identical with the modulation result of 2 π+θ, -2 π+θ, 2 θ
Identical with the modulation result of+2 θ of 2 π ,+2 θ of -2 π, 3 θ are identical with the modulation result of+3 θ of 2 π ,+3 θ of -2 π, therefore, set by algorithm
Meter, can make a certain azimuth satisfaction modulation result at each frequency so that realize that size is in the azimuth of same modulating unit
Azimuthal n times of Spatial transmission, the Spatial transmission for enabling these multiples different is corresponding to reproduction image needed for different frequency
Phase information.Therefore, in the specific implementation, the azimuth of the Spatial transmission unit of micro-nano structure can be carried out by optimized algorithm
Design, so that obtain different phase holograms under different outgoing frequencies of light.
Used as an optional embodiment, the S1 is further included：
S1.1, determines the incident light frequency of the micro-nano structure；
S1.2, calculates the emergent light of the micro-nano structure in fundamental frequency and the frequency multiplication of the incident light frequency at least one respectively
The phase information of each pixel of width hologram image.
This step is that the phase information required for being reproduced to hologram image on a different frequency is calculated, and the present invention is realized
The multiplex technique for realizing hologram image is modulated to the Spatial transmission unit of the micro-nano structure, naturally it is also possible to only modulation one
Width figure, therefore the phase information includes the phase information of one or more image.
When being embodied as, can be with the Fidoc algorithms for calculating phase hologram, to the difference that need to be carried in different frequencys multiplication
Reproduction light wave elongate member of the image according to needed for which carries out successive ignition and calculates and carry out certain adjustment, and acquisition can be met each
The position facies unit of the modulation result under frequency so as to multiple in different multiplying at the azimuth of the Spatial transmission unit by micro-nano structure
The Spatial transmission that size is azimuthal n times can be realized now, so as to correspond to the position phase for reappearing image needed for different frequency
Information, obtains different phase holograms.
Used as an optional embodiment, the S2 is further included：
In units of the single Spatial transmission unit of the micro-nano structure, according to the phase information to the Spatial transmission
Unit carries out phase coding, realizes Spatial transmission；Or
In units of each two Spatial transmission unit of the micro-nano structure, institute's rheme is mutually adjusted according to the phase information
Unit processed carries out phase coding, realizes double Spatial transmissions.
Multiplex technique of the present invention to hologram image, not only can realize that the Spatial transmission based on micro-nano structure is multiplexed, also
Can realize that the complex amplitude based on micro-nano structure is modulated.When realizing that the complex amplitude is modulated, specifically by the micro-nano structure
Each two Spatial transmission dividing elements be a complex amplitude modulating unit, the light after to two Spatial transmission cells modulates
Superposition obtains complex amplitude modulation effect, so as to realize the complex amplitude modulation multiplex technology to hologram image.
When incident light frequency is ω, under fundamental frequency of the outgoing light frequency for ω, single modulating unit realizes 2 θ respectively1With 2 θ2
Spatial transmission, then modulating unit combine the pixel elements to be formed modulation result meet：
Wherein, AaFor the amplitude information obtained after modulation,For new geometry texture information, θ1And θ2By optimized algorithm
Obtain.
For outgoing light frequency is 2 ω of secondary harmonics, when the characteristic of outgoing, incident illumination is identical and different, pixel elements are adjusted
Result processed meets respectively：
Wherein, Ab、AcFor the amplitude information obtained after modulation,For new geometry texture information.So, just lead to
Many image complex amplitude codings are realized in the combination for crossing non-linear micro-nano structure.
As shown in Fig. 2 be micro-nano structure embodiment schematic diagram of the present invention, micro-nano structure 2 described in the present embodiment by
Nano-antenna structure composition forms super surface, and each metal bar is used as a Spatial transmission unit 1, two Spatial transmission units 1
A complex amplitude modulating unit can be constituted.The present invention is modulated reality by the azimuth angle theta to nano-antenna as shown in Figure 2
Existing Spatial transmission, or by the azimuth angle theta of two nano-antennas1And θ2It is modulated and realizes that complex amplitude is modulated.
During the holographic multiplexing based on nonlinear characteristic, single nano-antenna can in the different frequencys multiplication of incident illumination and
Under polarization corresponding relation, additional magnitude is mutually modulated for the position of n θ, and whole micro-nano structure 2 surpasses the Spatial transmission unit on surface
Different hologram images then can be reappeared accordingly at different conditions.
Used as an optional embodiment, the S3 is further included：
S3.1, based on the incident light frequency, obtains rotatory polarization or line polarisation incident illumination；
S3.2, based on the rotatory polarization, respectively with right-handed rotation and/or the incident micro-nano structure of left-handed rotation, obtains several
The reproduction image of hologram image；Or
Based on line polarisation, respectively with x directions line polarisation and/or the incident micro-nano structure of y directions line polarisation, several are obtained
The reproduction image of hologram image.
When the present invention realizes the multiplexing of hologram image, incident illumination has different polarization states, using the difference of each harmonic frequency components
Different Spatial transmission results of identical Spatial transmission unit under polarization state so that the reproduction quantity of hologram image is greatly increased.
Specifically, with reference to frequency doubling non-linear's characteristic and the different polarization state of incident illumination of micro-nano structure, to the micro-nano
The Spatial transmission unit of structure carries out Spatial transmission and complex amplitude modulation includes first embodiment, second embodiment, the 3rd enforcement
Example and fourth embodiment.
First embodiment of the invention, realizes the phase hologram multiplexing of hologram image with rotatory polarization as incident illumination.
When rotatory polarization is as incident illumination, there are right-handed rotation incidence and left-handed rotation two kinds of situations of incidence；And emergent light, there is also
Left-handed component and right hand component.
For formula (4) and formula (5), σ=1 when defining right-handed rotation, σ=- 1 during left-handed rotation.
When incident illumination is right-handed rotation and frequency is ω, for frequency is the fundamental frequency emergent light of ω, n=1.Investigate emergent light
Right hand component when, it is identical with the polarization of incident light, then the geometry texture for introducing be 0；It is when investigating left-handed component, inclined with incident illumination
Shaking property is conversely, then introduce the geometry texture of 2 θ.For the emergent light that frequency is 2 ω, n=2.Investigate the right hand component of emergent light
When, the geometry texture of introducing is θ, when investigating left-handed component, introduces the geometry texture of 3 θ.
When incident illumination is left-handed rotation and frequency is ω, for frequency is the emergent light of ω, the dextrorotation point of emergent light is investigated
During amount, the geometry texture of introducing is -2 θ, and when investigating left-handed component, then it is 0 to introduce geometry texture；For the outgoing that frequency is 2 ω
Light, when investigating the right hand component of emergent light, the geometry texture of introducing is -3 θ, when investigating left-handed component, introduces the geometry position of-θ
Phase.
Due to when introducing geometry texture is 0, not forming Spatial transmission result, but strong background light field can be formed, thus this
It is 0 to carry out Spatial transmission that invention does not select to introduce geometry texture.
For rotatory polarization condition of incidence, when outgoing light frequency is ω, the Spatial transmission situation of generation is as shown in the table:
When outgoing light frequency is 2 ω, the Spatial transmission situation of generation is as shown in the table:
Thus, rotatory polarization incident optical energy forms six groups of different Spatial transmission modes, can introduce phase by emergent light respectively
To the deflection of the Spatial transmission unit of the micro-nano structure -3, -2, -1,1,2,3 times of Spatial transmission result.
Second embodiment of the invention, realizes the phase hologram multiplexing of hologram image with line polarisation as incident illumination.
Equally, using the corresponding relation between line polarisation incidence and emergent light, different positions can be also obtained under each frequency multiplication
Phase modulation result.By arranging x direction line polarisations and y directions line polarisation, obtain and the similar Spatial transmission result of rotatory polarization.
Likewise, due to when introducing geometry texture is 0, not forming Spatial transmission result, but strong background light field can be formed,
Thus it is 0 to carry out Spatial transmission that the present invention does not select to introduce geometry texture.
When incident light frequency is ω, and outgoing light frequency is ω fundamental frequencies, the Spatial transmission situation of generation is as shown in the table:
When outgoing light frequency is 2 ω, the Spatial transmission situation of generation is as shown in the table:
Thus, line polarisation incident optical energy forms six groups of different Spatial transmission modes, can introduce phase by emergent light respectively
To the deflection of the Spatial transmission unit of the micro-nano structure -3, -2, -1,1,2,3 times of Spatial transmission result.
Third embodiment of the invention and fourth embodiment, using the combination of two Spatial transmission units, form one and shake again
Width modulating unit, obtains the pixel elements of complex amplitude modulation.With the nonlinear characteristic of micro-nano material, equally can be in different modulating frequency
Complex amplitude modulation is carried out under rate and different rotatory polarizations.
Third embodiment of the invention, realizes the holographic multiplexing of the complex amplitude of hologram image by incident illumination of rotatory polarization.
It is modulated using fundamental frequency and two frequencys multiplication, in the bar that the deflection of the Spatial transmission unit of the micro-nano structure is θ
Under part, different positions are realized to the emergent light of different frequency and polarization state using single micro-nano modulating unit under a certain rotatory polarization
Mutually modulate.By taking right-handed rotation incidence as an example, in fundamental frequency omega, it is mutually 2 θ that emergent light introduces bits of modulation；In two frequencys multiplication, emergent light
It is mutually θ, 3 θ of right hand component introducing bits of modulation phase that right hand component introduces bits of modulation.By to the micro-nano structure under different condition
The azimuth of Spatial transmission unit is combined coded modulation, it is possible to obtain the result of complex amplitude modulation.
Analyze based on more than, realized by dibit phase modulating unit, as the azimuth of two Spatial transmission units is distinguished
For θ1And θ2, when incident illumination is rotatory polarization right-handed rotation, 2 θ of geometry texture of the left-handed component during acquisition emergent light fundamental frequency1、
2θ2；And/or the geometry texture θ of right hand component during two frequency multiplication of emergent light1、θ2And 3 θ of geometry texture of left-handed component1、3
θ2。
Fourth embodiment of the invention, realizes the holographic multiplexing of the complex amplitude of hologram image by incident illumination of line polarisation.
It is modulated using fundamental frequency and two frequencys multiplication, incident illumination is x directions line polarisation and frequency when being ω, in fundamental frequency omega,
It is mutually 2 θ that emergent light introduces bits of modulation；In two frequencys multiplication, it is mutually θ that the x directions polarized component of emergent light introduces bits of modulation, y directions
Polarized component introduces 3 θ of bits of modulation phase.Group is carried out by the Spatial transmission unit to the micro-nano structure under the conditions of different line polarisations
Close coded modulation, it is possible to obtain the result of complex amplitude modulation.
Analyze based on more than, realized by dibit phase modulating unit, as the azimuth of two Spatial transmission units is distinguished
For θ1And θ2, when incident illumination is x directions line polarisation, the geometry texture 2 of the y directions line polarisation during acquisition emergent light fundamental frequency
θ1、2θ2, and/or 3 θ of geometry texture of y directions line polarisation during two frequency multiplication of emergent light1、3θ2And x directions line polarisation is several
What phase θ1、θ2。
As shown in figure 3, be a kind of hologram image multiplexing method embodiment schematic diagram of the invention, the incident micro-nano knot of incident illumination 3
Structure 2 surpasses surface, forms different hologram images 5 by emergent light 4.Concrete steps include：
Step 1：To needing the position phase that several hologram images are calculated with each pixel for obtaining every width hologram image for reproducing
Information, has carried out the volume corresponding with the phase information according to the phase information for calculating to the Spatial transmission unit of micro-nano structure
Code, that is, adjust the azimuth of each Spatial transmission unit, is encoded by arrangement, realizes on identical holographic plate to several figures
The record of picture.
Step 2：By the super table of LASER Light Source, the polarizer, quarter wave plate, convex lenss, analyzer, filter plate and micro-nano structure
The combination in face is obtained required line polarized light or circularly polarized light as incident illumination.Specifically compound mode according to incident illumination is
Line polarized light or circularly polarized light and it is different.
Step 3：Incident illumination enters line frequency sieve through the super surface being made up of linear micro-nano structure, emergent light by filter plate
Choosing, the hologram image reappeared under frequency needed for obtaining.
The compound mode of device in step 2, is line polarized light or circularly polarized light and different according to incident illumination.When
When incident illumination is rotatory polarization, need to add quarter wave plate after the polarizer.And in order to screen to the polarized component of emergent light,
After super surface hologram, emergent light need to again after quarter wave plate through analyzer, so as to needed for being designed with
The identical or contrary emergent light of incident illumination rotation direction；When incident illumination is line polarisation, then quarter wave plate is not needed, specifically can be referring to Fig. 4
And Fig. 5.
A kind of hologram image multiplexer as shown in Figure 4, described device include the LASER Light Source 6 being sequentially connected in series, are polarized
Device 7, convex lenss 8, micro-nano structure 2 surpass surface, analyzer 11 and filter plate 12；When described device is used for realizing line polarisation incident illumination
Spatial transmission hologram image multiplexing or complex amplitude hologram image multiplexing.
A kind of hologram image multiplexer as shown in Figure 5, described device include the LASER Light Source being sequentially connected in series, are polarized
The super surface of device, quarter wave plate, convex lenss, micro-nano structure, quarter wave plate, analyzer and filter plate；Described device is used for realizing that circle is inclined
The multiplexing of Spatial transmission hologram image or the multiplexing of complex amplitude hologram image during light incident illumination.
As in Fig. 3, the polarization state of incident illumination 3 and emergent light 4 can be：
Under rotatory polarization condition of incidence, there are four kinds of optional situations：1. incident illumination 3 is right-handed rotation, and emergent light 4 is right-handed rotation；②
Incident illumination 3 is right-handed rotation, and emergent light 4 is left-handed rotation；3. incident illumination 3 is left-handed rotation, and emergent light 4 is right-handed rotation；4. incident illumination 3 is
Left-handed rotation, emergent light 4 are left-handed rotation.According to the selection of different polarization states corresponding relation, different phase-modulation results are obtained.
Under line polarisation condition of incidence, there are four kinds of optional situations：1. incident illumination 3 is x directions polarized light, and emergent light 4 is x directions
Polarized light；2. incident illumination 3 is x directions polarized light, and emergent light 4 is y directions polarized light；3. incident illumination 3 is y directions polarized light, is gone out
Light 4 is penetrated for x directions polarized light；4. incident illumination 3 is y directions polarized light, and emergent light 4 is y directions polarized light.According to different polarization states
The selection of corresponding relation, obtains different phase-modulation results.
As shown in fig. 6, the present invention also provides a kind of hologram image multiplex system, including：
Phase information module is obtained, for based on micro-nano structure, acquisition reappears different hologram images on a different frequency
When every width hologram image each pixel phase information；
Phase coding modulation module, for based on the phase information, entering to the Spatial transmission unit of the micro-nano structure
The corresponding phase coding modulation of row；
Holographic multiplexing Rendering module, for the micro-nano structure after the incident light beam strikes coding with different polarization states, obtains not
The reproduction image of same hologram image.
The main technical schemes of the present invention include：
1st, the nonlinear characteristic according to micro-nano material, in a branch of incident light beam strikes to the super surfacing of non-linear micro-nano structure
When upper, various non-interfering emergent lights such as fundamental frequency, two frequencys multiplication, frequency tripling were produced under nonlinear resonance condition, by filtering
Piece carries out screening the different hologram image obtained under different frequency to emergent light, while background when reducing image reproduction is made an uproar
Sound.
2nd, changed from the emergent light polarity corresponding relation of different frequencys multiplication according to the incident illumination projected on micro-nano structure
When the geometric phase that introduces it is different, so as to realize the reproduction process of the different holograies under opposed polarity corresponding relation.
3rd, modulate to realize complex amplitude, two non-linear micro-nano structure phase modulation unit are combined, are divided into
One complex amplitude modulating unit, by two phase-modulation results addeds, obtains Modulation and Amplitude Modulation and new phase-modulation result.Again
Because the nonlinear characteristic of micro-nano structure, then can realize that the complex amplitude of many images is holographic and show.
Under SHG properties of the present invention based on the super surfacing of micro-nano structure, and different frequencys multiplication, polarity corresponding relation is formed
The difference of Spatial transmission, using precalculated every width hologram image when reappearing different hologram images on a different frequency
The phase information of each pixel, carries out phase coding modulation to the Spatial transmission unit of micro-nano structure, and obtains several holograies
The reproduction of picture.
Finally, the present processes are only preferably embodiment, are not intended to limit protection scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc. should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of hologram image multiplexing method, it is characterised in that include：
S1, based on frequency doubling non-linear's characteristic of micro-nano structure, obtains when reappearing different hologram images on a different frequency per width
The phase information of each pixel of hologram image；
S2, based on the phase information, carries out corresponding phase coding modulation to the Spatial transmission unit of the micro-nano structure；
S3, with the micro-nano structure after the incident light beam strikes coding of different polarization states, obtains the reproduction image of different hologram images.
2. method as claimed in claim 1, it is characterised in that the S1 is further included：
S1.1, determines the incident light frequency of the micro-nano structure；
S1.2, calculates the emergent light of a micro-nano structure at least width in fundamental frequency and the frequency multiplication of the incident light frequency complete respectively
The phase information of each pixel of breath image.
3. method as claimed in claim 1, it is characterised in that the S2 is further included：
In units of the single Spatial transmission unit of the micro-nano structure, according to the phase information to the Spatial transmission unit
Phase coding is carried out, Spatial transmission is realized；Or
In units of each two Spatial transmission unit of the micro-nano structure, according to the phase information to the Spatial transmission list
Unit carries out phase coding, realizes double Spatial transmissions.
4. such as Claims 2 or 3 methods described, it is characterised in that the S3 is further included：
S3.1, based on the incident light frequency, obtains rotatory polarization or line polarisation incident illumination；
S3.2, based on the rotatory polarization, respectively with right-handed rotation and/or the incident micro-nano structure of left-handed rotation, obtains several holographic
The reproduction image of image；Or
Based on line polarisation, respectively with x directions line polarisation and/or the incident micro-nano structure of y directions line polarisation, several are obtained holographic
The reproduction image of image.
5. method as claimed in claim 4, it is characterised in that the S1.2 is further included：
When incident illumination is rotatory polarization right-handed rotation, 2 θ of geometry texture of the left-handed component during acquisition emergent light fundamental frequency, and/or
3 θ of geometry texture of the geometry texture θ and left-handed component of right hand component during two frequency multiplication of emergent light；And/or
When incident illumination is rotatory polarization left-handed rotation, -2 θ of geometry texture of the left-handed component during acquisition emergent light fundamental frequency, and/
Or -3 θ of geometry texture and the geometry texture-θ of left-handed component of right hand component during two frequency multiplication of emergent light；
Wherein, θ is the azimuth of the Spatial transmission unit of the micro-nano structure.
6. method as claimed in claim 4, it is characterised in that the S1.2 is further included：
When incident illumination is x directions line polarisation, 2 θ of geometry texture of the y directions line polarisation during acquisition emergent light fundamental frequency, and/
Or the geometry texture θ of the 3 θ and x directions line polarisation of geometry texture of y directions line polarisation during two frequency multiplication of emergent light；And/or
When incident illumination is y directions line polarisation, -2 θ of geometry texture of the x directions line polarisation during acquisition emergent light fundamental frequency,
And/or -3 θ of geometry texture of the geometry texture-θ and x direction line polarisation of y directions line polarisation during two frequency multiplication of emergent light；
Wherein, θ is the azimuth of the Spatial transmission unit of the micro-nano structure.
7. method as claimed in claim 4, it is characterised in that double Spatial transmissions include described in the S2：
When incident illumination is rotatory polarization right-handed rotation, 2 θ of geometry texture of the left-handed component during acquisition emergent light fundamental frequency1、2θ2；
And/or the geometry texture θ of right hand component during two frequency multiplication of emergent light1、θ2And 3 θ of geometry texture of left-handed component1、3θ2；
Wherein, θ1And θ2It is divided into the azimuth of two Spatial transmission units of the complex amplitude modulating unit.
8. method as claimed in claim 4, it is characterised in that double Spatial transmissions include described in the S2：
When incident illumination is x directions line polarisation, 2 θ of geometry texture of the y directions line polarisation during acquisition emergent light fundamental frequency1、2
θ2, and/or 3 θ of geometry texture of y directions line polarisation during two frequency multiplication of emergent light1、3θ2And the geometry position of x directions line polarisation
Phase θ1、θ2；
Wherein, θ1And θ2It is divided into the azimuth of two Spatial transmission units of the complex amplitude modulating unit.
9. a kind of hologram image multiplexer, it is characterised in that LASER Light Source that described device includes being sequentially connected in series, the polarizer,
The super surface of convex lenss, micro-nano structure, analyzer and filter plate；Described device is used for realizing Spatial transmission during line polarisation incident illumination
Hologram image is multiplexed or the multiplexing of complex amplitude hologram image；Or
LASER Light Source that described device includes being sequentially connected in series, the polarizer, quarter wave plate, convex lenss, the super surface of micro-nano structure, 1/4 ripple
Piece, analyzer and filter plate；Described device is used for the multiplexing of Spatial transmission hologram image when realizing rotatory polarization incident illumination or shakes again
Width hologram image is multiplexed.
10. a kind of hologram image multiplex system, it is characterised in that include：
Phase information module is obtained, for based on micro-nano structure, acquisition reappears every during different hologram images on a different frequency
The phase information of each pixel of width hologram image；
Phase coding modulation module, for based on the phase information, carrying out phase to the Spatial transmission unit of the micro-nano structure
The phase coding modulation answered；
Holographic multiplexing Rendering module, for the micro-nano structure after the incident light beam strikes coding with different polarization states, obtains different
The reproduction image of hologram image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611220799.0A CN106527093B (en) | 2016-12-26 | 2016-12-26 | Hologram image multiplexing method and system based on frequency doubling non-linear and polarization characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611220799.0A CN106527093B (en) | 2016-12-26 | 2016-12-26 | Hologram image multiplexing method and system based on frequency doubling non-linear and polarization characteristic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106527093A true CN106527093A (en) | 2017-03-22 |
| CN106527093B CN106527093B (en) | 2019-03-19 |
Family
ID=58338794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611220799.0A Active CN106527093B (en) | 2016-12-26 | 2016-12-26 | Hologram image multiplexing method and system based on frequency doubling non-linear and polarization characteristic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106527093B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037713A (en) * | 2017-06-06 | 2017-08-11 | 哈尔滨工程大学 | A kind of relevant tunable optical holographic |
| CN109375368A (en) * | 2018-10-24 | 2019-02-22 | 泉州师范学院 | A kind of production method of the multifocal spot array of three-dimensional based on space Dipole Arrays |
| CN111009181A (en) * | 2019-12-18 | 2020-04-14 | 武汉大学 | Super-surface-based design method for realizing multiplexing of single-color random anti-counterfeiting pattern and double-color anti-counterfeiting pattern |
| CN111027337A (en) * | 2019-12-10 | 2020-04-17 | 华中科技大学 | Heat radiation information loading device and method and loaded information reading method |
| CN111292226A (en) * | 2020-01-15 | 2020-06-16 | 武汉大学 | Design method for realizing multiplexing of structural color image and continuous gray level image based on super surface |
| CN115202175A (en) * | 2022-06-08 | 2022-10-18 | 暨南大学 | Ultrathin super-surface structure based on light field coding and preparation method thereof |
| CN117118523A (en) * | 2023-10-13 | 2023-11-24 | 之江实验室 | Information transmission system, method and device, storage medium and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1918519A (en) * | 2003-12-15 | 2007-02-21 | 剑桥大学技术服务有限公司 | Apparatus and method for displaying a holographic video image sequence |
| WO2008127432A3 (en) * | 2006-11-21 | 2008-12-11 | California Inst Of Techn | Method of nonlinear harmonic holography |
| US20130250383A1 (en) * | 2012-03-21 | 2013-09-26 | Coherix, Inc. | Apparatus for multi-wavelength holographic imaging |
| CN105264443A (en) * | 2013-06-06 | 2016-01-20 | 视瑞尔技术公司 | Device and method for calculating holographic data |
| CN105676614A (en) * | 2016-03-19 | 2016-06-15 | 上海大学 | Three-viewing-angle single-hologram multi-beam combination recording system |
-
2016
- 2016-12-26 CN CN201611220799.0A patent/CN106527093B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1918519A (en) * | 2003-12-15 | 2007-02-21 | 剑桥大学技术服务有限公司 | Apparatus and method for displaying a holographic video image sequence |
| WO2008127432A3 (en) * | 2006-11-21 | 2008-12-11 | California Inst Of Techn | Method of nonlinear harmonic holography |
| US20130250383A1 (en) * | 2012-03-21 | 2013-09-26 | Coherix, Inc. | Apparatus for multi-wavelength holographic imaging |
| CN105264443A (en) * | 2013-06-06 | 2016-01-20 | 视瑞尔技术公司 | Device and method for calculating holographic data |
| CN105676614A (en) * | 2016-03-19 | 2016-06-15 | 上海大学 | Three-viewing-angle single-hologram multi-beam combination recording system |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037713A (en) * | 2017-06-06 | 2017-08-11 | 哈尔滨工程大学 | A kind of relevant tunable optical holographic |
| CN107037713B (en) * | 2017-06-06 | 2019-08-06 | 哈尔滨工程大学 | A kind of tunable optical holographic that is concerned with |
| CN109375368A (en) * | 2018-10-24 | 2019-02-22 | 泉州师范学院 | A kind of production method of the multifocal spot array of three-dimensional based on space Dipole Arrays |
| CN111027337A (en) * | 2019-12-10 | 2020-04-17 | 华中科技大学 | Heat radiation information loading device and method and loaded information reading method |
| CN111027337B (en) * | 2019-12-10 | 2021-07-27 | 华中科技大学 | Heat radiation information loading device and method and loaded information reading method |
| CN111009181A (en) * | 2019-12-18 | 2020-04-14 | 武汉大学 | Super-surface-based design method for realizing multiplexing of single-color random anti-counterfeiting pattern and double-color anti-counterfeiting pattern |
| CN111292226A (en) * | 2020-01-15 | 2020-06-16 | 武汉大学 | Design method for realizing multiplexing of structural color image and continuous gray level image based on super surface |
| CN111292226B (en) * | 2020-01-15 | 2021-11-16 | 武汉大学 | Design method for realizing multiplexing of structural color image and continuous gray level image based on super surface |
| CN115202175A (en) * | 2022-06-08 | 2022-10-18 | 暨南大学 | Ultrathin super-surface structure based on light field coding and preparation method thereof |
| CN115202175B (en) * | 2022-06-08 | 2023-06-13 | 暨南大学 | Ultra-thin super-surface structure based on light field coding and preparation method thereof |
| CN117118523A (en) * | 2023-10-13 | 2023-11-24 | 之江实验室 | Information transmission system, method and device, storage medium and electronic equipment |
| CN117118523B (en) * | 2023-10-13 | 2024-01-26 | 之江实验室 | Information transmission system, method and device, storage medium and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106527093B (en) | 2019-03-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106527093A (en) | Nonlinear frequency doubling and polarization characteristic-based hologram multiplexing method and system | |
| CN109478603B (en) | Magnetic photon encoder | |
| CN110456439B (en) | Supersurface material capable of simultaneously realizing color nano printing and color phase type holography and design method thereof | |
| RU2377623C2 (en) | Method of viewing stereo images with complete resolution for each aspect and device to this end | |
| Otte et al. | Higher-order polarization singularitites in tailored vector beams | |
| CN107817629A (en) | A kind of liquid crystal display device | |
| CN103969835B (en) | Composite space optical modulator and the 3D rendering display device for including it | |
| CN102081339B (en) | Method and system for displaying holographic three-dimensional image based on first-order spectrum time division multiplexing technology | |
| CN108802872A (en) | The preparation method of full Stokes vector polarizer based on surface plasma primitive | |
| US20130100179A1 (en) | Multiple-primary color liquid crystal display apparatus | |
| CN110147022A (en) | Four-wave mixing holographic multiplexing methods based on non-linear super clever surface | |
| CN108419070A (en) | A kind of optical field imaging method based on PB phase-modulations | |
| CN111008948B (en) | Method for combining random pattern with space-frequency multiplexing super-surface image | |
| Wang et al. | Optical image authentication using spatially variant polarized beam and sparse phase sampling method | |
| CN109283735A (en) | A kind of display device and method | |
| Kataoka et al. | Compound auroral micromorphology: ground-based high-speed imaging | |
| Rayyan et al. | Extent of frustration in the classical Kitaev-Γ model via bond anisotropy | |
| KR100449879B1 (en) | Three-dimensional image display apparatus | |
| JP2013025141A (en) | Image processor, image display device and image processing method | |
| CN109270816A (en) | A kind of method for generating holograms and color holographic display system | |
| CN208903081U (en) | A kind of color holographic display system | |
| Shen et al. | Electrically tunable all-dielectric metasurfaces integrated with nematic liquid crystals for information encryption | |
| Abuturab | Gyrator wavelet transform based non-linear multiple single channel information fusion and authentication | |
| CN115327677A (en) | Vector super surface for realizing polarization information encryption and design method | |
| US20210231996A1 (en) | Light modulation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |