CN102129211B - Method for making synthetic hologram - Google Patents
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Abstract
The invention discloses a method for making a synthetic hologram, which comprises the following steps of: sampling, and acquiring M images, of different visual angles, of a three-dimensional object or a partial region of the three-dimensional object; performing the following processing on the M images: grouping the M images into a first image sequence, splitting each image in the first image sequence into N longitudinal image columns, extracting an image column from each image in the first image sequence to form a new image, and then obtaining a second image sequence with N images; and sequentially outputting the processed images through a spatial light modulator, and recording the processed images to N narrow and long regions of a holographic dry plate to obtain the synthetic hologram ofthe three-dimensional object or the partial region of the three-dimensional object.
Description
Technical field
The present invention relates to the holographic technique field, relate in particular to a kind of method for making of integral hologram.
Background technology
At present, whole optical information that holography can the recording and reconstruction object have important research in the application aspect the optical stereo demonstration and are worth.Synthetic hologram technology as one of its branch, both utilized stereoscopic thought to the sense of image compound stereoscopic, but the characteristics of holography original optical diffraction reproduction have been utilized again, have production method flexibly, abundant shooting subject matter and strong visual impact, can with easy reproduction form, realize that high-quality stereo scene optics shows.
The nineties rises, and quo of digital stereogram how to make the large tracts of land full color becomes one of focus of countries in the world display holography research.Present external existing many scientific research institutions and company are devoted to integral hologram and commercially produce and use, integral hologram enters the commercial market as high-quality 3-D display means, its automatic shooting equipment also is one of the study hotspot in stereo display field, and integrated, commercialization.Yet external similar devices and correlation technique hold in close confidence, and price is quite expensive.One more than 30 ten thousand dollars of digital formation of hologram equipment prices of cover are made one 1 meter * 1 meter the expense of hologram up to tens thousand of dollars.
The method for making of domestic existing integral hologram generally has two kinds at present, the one, utilize the reflection of known Fresnel hologram and white light reconstruction or rainbow hologram to take light path, take known two step method white light reconstruction hologram, when the hologram area is larger (for example greater than at present common holographic dry plate size 25cm * 20cm), very high to equipment requirement, such as high-power laser instrument, bigbore optical lens etc., so that light path is long excessive, making apparatus is heavy and very expensive, realizes at equipment and technical all being difficult to.In addition, the image pickup method of two step of tradition synthetic hologram, the image that sampling obtains is directly taken on the holographic dry plate behind slit or the square hole, during reproduction, the observer can't see a complete 2 d fluoroscopy images, but several, all angles 2 d fluoroscopy images overlapping, the observer sees will be fully chaotic image, cause the second-rate of the integral hologram that obtains.The 2nd, utilize existing dot matrix litho machine, can make the larger embossed hologram of area, yet the shortcoming of this kind method maximum is to make simple image, the geometry striped that for example changes and simple grating etc., be difficult to reach the effect of solid, can't realize that high-quality holographic shows, therefore mainly for the manufacture of the large format holographic packaging materials etc.It is generally speaking, domestic that still there is a big difference compared with developed countries aspect large-area synthetic hologram demonstration technique for taking.
Summary of the invention
In view of this, be necessary to provide a kind of method for making that can be used in the integral hologram of the integral hologram of making large-area high-quality.
A kind of integral hologram method for making may further comprise the steps: sample, obtain the image of the M width of cloth different visual angles of three-dimensional body or three-dimensional body subregion; Above-mentioned M width of cloth image is handled as follows: above-mentioned M width of cloth image is organized as the first image sequence, every width of cloth image in the first image sequence is split as N vertically image column, from the first image sequence, extract again an image column in every width of cloth image out and form the new image of a width of cloth, obtain thus having the second image sequence of N width of cloth image; And the image after the above-mentioned processing is exported successively and is recorded to by spatial light modulator on N the long and narrow zone of holographic dry plate, obtain the integral hologram of three-dimensional body or three-dimensional body subregion.
In the described integral hologram method for making, by the original two dimensional image sequence being carried out the conversion of information extraction, image fractionation and restructuring.When integral hologram reproduces, every of the observer soon to will no longer be that chaotic image is overlapping, but according to certain rule, the complete two dimensional image that combines in an orderly manner, and meet stereoscopic to relation, form the compound stereoscopic sense, therefore, can access high-quality integral hologram.In addition, the integral hologram that obtains of described integral hologram method for making can splice and obtains more large-area integral hologram.The method of the invention to solve large tracts of land with great visual angle the full color integral hologram automatically take problem, catch up with the process with commercial applications commercially produced of forward position, world large tracts of land compound display hologram, have important practical value.
Description of drawings
Image processing process synoptic diagram in the integral hologram method for making that Fig. 1 provides for first embodiment of the invention.
A kind of integral hologram schematic diagram that Fig. 2 provides for prior art.
The index path that Fig. 3 uses for the integral hologram method for making that first embodiment of the invention provides.
The integral hologram that Fig. 4 provides for first embodiment of the invention is made the method synoptic diagram of large tracts of land integral hologram.
Image processing process synoptic diagram in the integral hologram method for making that Fig. 5 provides for second embodiment of the invention.
Image processing process synoptic diagram in the integral hologram method for making that Fig. 6 provides for third embodiment of the invention.
Obtain the schematic diagram of colored integral hologram in the integral hologram method for making that Fig. 7 provides for third embodiment of the invention.
The index path that Fig. 8 uses for the integral hologram method for making that third embodiment of the invention provides.
The making index path of the holographic optical elements (HOE) that uses in the integral hologram method for making that Fig. 9 provides for third embodiment of the invention.
The index path that Figure 10 uses for the integral hologram method for making that fourth embodiment of the invention provides.
Embodiment
Come the present invention is described in further detail below in conjunction with accompanying drawing and specific embodiment.
The integral hologram method for making that first embodiment of the invention provides may further comprise the steps:
Step 1: sample, obtain the image of the M width of cloth different visual angles of three-dimensional body.
Sampling comprises actual three-dimensional body and virtual three-dimensional object sampling dual mode.Actual three-dimensional body can adopt existing guide tracked automatic control three-dimensional body sampling system, the digital camera that this system's setting angle is controlled or Digital Video, can according to program setting take three-dimensional body each Perspective image (with general camera also can, then need with scanner photochrome to be inputted computing machine and process).The virtual three-dimensional object utilizes Computerized three-dimensional modeling and animation software to generate a virtual three-dimensional object or three-dimensional body animation, plays up as requested each Perspective image of output virtual three-dimensional object.
The sampling angle scope is got 45 degree usually between 60 degree.If but only be the spatial impression of its big angle rotary of performance, and ignore its real angle of reproducing, sampling angle can be obtained larger.Adopt the number of image generally to be no less than 100.The resolution of sampled images is the bigger the better less than the resolution of follow-up spatial light modulator be used to reading these images the time usually, if but the resolution of excess space photomodulator with nonsensical.The below will illustrate the optional sampling method for dissimilar three-dimensional bodies, be appreciated that the method for sampling for these dissimilar three-dimensional bodies is not limited to following example.
When still life is sampled, still life can be placed on the rotating disk, digital camera is positioned over the rotating disk dead ahead, and rotating disk forwards 25 degree to from-25 degree, 0.5 ° of shooting of every rotation piece image, totally 100 width of cloth.Image input computing machine, improve each item of image of picture element with image software (such as photoshop etc.) and process, as image is cut out, remove unwanted background and bad shade etc. on the original photo, to arrive best artistic effect, obtain one group of original two dimensional image sequence.Above-mentioned digital camera can be taken by computer control, to realize the shooting process robotization.
When the people is sampled, can take personage's head portrait, bust and station picture, also can take the exquisite photograph of similar wedding photography.Personage's head portrait is taken and can be stood as allowing the personage stand in the rotating disk photographs with the straightforward procedure of photographer's rotation head, and rotating disk is preferably used Electric Machine Control, and rotation and rotary angle controllable remain a constant speed.Image pickup method is roughly identical when still life is taken, what pay particular attention to is that the very difficult maintenance of portrait is fully static, preferably adopt one section animation that the personage rotates under the Digital Video fast recording, then input computing machine, use the digital video process software, such as mainactor, angle decomposition is 100 width of cloth plane pictures as requested.
When the three-dimensional stereo model that computing machine is generated is sampled, for example, the novel concept car by computer-aided design (CAD).Utilize Computerized three-dimensional modeling and layout software commonly used, such as 3DMAX, process the car model data, in addition suitable illumination, material.Then play up output, export this stereoscopic model by plane picture 100 width of cloth of required Angles Projections.
Step 2: above-mentioned M width of cloth image is carried out image process.
See also Fig. 1, in this image was processed, the conversion of carrying out horizontal direction realized synthetic parallax.Before conversion, need to the original image that sampling obtains be numbered, the M width of cloth two dimensional image that previous step is obtained is organized as first an image sequence (X
1, X
2..., X
i... X
M), 1≤i≤M, wherein, total M width of cloth image in the first image sequence, each width of cloth image is designated as X
i, and with X
iExpression vector matrix form, i.e. X
i=(x
I1, x
I2..., x
Ik..., x
IN).Wherein, slit number when footmark N namely is the integral hologram shooting, this identifier declaration image is split as N vertically image column by the number according to slit, provides an image column to form the new image of a width of cloth by every width of cloth image in the first image sequence again, and the process of concrete conversion is: from X
i=(x
I1, x
I2..., x
Ik..., x
IN) in extract a certain image column, from whole two dimensional image arrays, extract M image column, form a width of cloth new images.Can be expressed as Y through the new two dimensional image of a width of cloth behind the image conversion
k=(x
1k, x
2k..., x
Ik... x
Mk), for example, work as k=1, extract each image the 1st row, be arranged in order composition new images matrix Y
1=(x
11, x
21..., x
I1... x
M1), conversion needs to carry out repeatedly for all original images, and the many groups conversion through from k=1 to k=N can obtain one group of second image sequence, and the image that comprises can be expressed as (Y
1, Y
2..., Y
N).Need to prove, can comprise one or more pixel columns in the above-mentioned image column, above-mentioned M both can equal N also can be not equal to N.
Step 3: the N width of cloth image that obtains after the above-mentioned image processing is recorded to successively on N the long and narrow zone of holographic dry plate.
Need to use for reference known two steps reflection integral hologram herein and describe, the method is present the most frequently used synthetic hologram image pickup method.Known two step method is at first taken Fresnel integral hologram mother matrix, then uses mother matrix reproducing hologram real image, takes the white light reconstruction reflection hologram again.The principle of its compound stereoscopic is as shown in Figure 2: there is a series of angle corresponding relation among the figure, and when being respectively sampling, the position of camera and object; When Fresnel hologram is taken, the position of slit and image; During white light reconstruction, the picture of slit (observer's eye position) and reproduction holographic images, these three positions exist angle corresponding.When human eye is positioned at different slits, see the two dimensional image of different angles, synthetic hologram is relief to derive from this.
Image pickup method according to above-mentioned known two step synthetic holograms, the image that sampling obtains is directly taken on the holographic dry plate behind slit or the square hole, during reproduction, the image that the observer sees is from the image of a plurality of slits or square hole, the intersection that overlaps each other, cause the observer can't see a complete 2 d fluoroscopy images, but several, all angles 2 d fluoroscopy images overlapping, the observer sees will be fully chaotic image.
See also Fig. 3, in the integral hologram method for making that present embodiment provides, the light of laser instrument 1 outgoing can be reflected mirror 2 and reflex on the beam splitter 3, and beam splitter 3 is divided into two bundles with the light of laser instrument 1 outgoing, and is a branch of for as with reference to light, another Shu Zuowei thing light.This thing light shines on the digital micro-mirror 6 through beam expanding lens 4 and collimation lens 5 successively, the N width of cloth image that above-mentioned image obtains after processing can be input on the digital micro-mirror 6 successively, is recorded on the holographic dry plate 10 by the element 16 of imaging len 7, convergence or scattering picture and the square hole on the square hole baffle plate 9 again.The element 16 of described convergence or scattering picture can be lens or diffuser screen etc.By controlling exposure interval time, mobile holographic dry plate 10, also accurately controlling moving step length and square hole dimension, on N long and narrow zone of holographic dry plate 10, record respectively above-mentioned N width of cloth image the most at last.In the present embodiment, reference beam is projeced on the square hole about with miter angle, and keeps the two-beam optical path difference to be about 0.The mobile device (not shown) of described holographic dry plate 10 can be come mobile holographic dry plate 10 by computer control, thereby can realize changing the coordinate operation of output image, the exposure of control shutter (not shown), automatically finish the laser interference print record of hologram.At last, to holographic dry plate 10 develop, photographic fixing processes, and obtains integral hologram.The mobile device of described holographic dry plate 10 can be a step motor.In the present embodiment, described laser instrument 1 adopts helium-neon laser, wavelength 632.8nm.
In the integral hologram method for making of present embodiment, by the original two dimensional image sequence being carried out the conversion of information extraction, image fractionation and restructuring.When integral hologram reproduces, every of the observer soon to will no longer be that chaotic image is overlapping, but according to certain rule, the complete two dimensional image that combines in an orderly manner, and meet stereoscopic to relation, form the compound stereoscopic sense, therefore, the integral hologram method for making by adopting present embodiment to provide can access high-quality integral hologram.
Please further consult Fig. 4, the integral hologram method for making that present embodiment provides can also be used for making large-area integral hologram, for example greater than the integral hologram of the size of holographic dry plate 10.When making large-area integral hologram, every image 11 of the three-dimensional body that sampling can be obtained is divided into a plurality of elementary areas 12 again, the identical elementary area 12 in position is organized as an image sequence in the image 11 of a plurality of three-dimensional bodies that then sampling obtained, so just can obtain a plurality of image sequences, then adopt above-mentioned steps 2 and step 3 that each image sequence is recorded on the holographic dry plate 10, namely a plurality of image sequences are recorded to respectively on a plurality of holographic dry plates 10.At last, by splicing these holographic dry plates 10, then can obtain a large-area integral hologram.For example, unit hologram size 18cm*9cm, overall dimensions is 36cm*54cm after the splicing of 12 module unit holograms.
The integral hologram method for making that the integral hologram method for making that second embodiment of the invention provides and above-mentioned the first embodiment provide is basic identical, the two difference is: in the integral hologram method for making that second embodiment of the invention provides, M width of cloth image is carried out the horizontal direction conversion, restructuring obtains N width of cloth image (Y
1, Y
2..., Y
N) after, N width of cloth image being carried out subchannel processes again, be that corresponding RGB triple channel is exported respectively one group of gray level image, as shown in Figure 5, re-use at last the index path of Fig. 3, adopt the redgreenblue laser instrument that the gray level image of respective channel is recorded on the holographic dry plate 10 successively, all adopt the redgreenblue laser instrument to record respectively a width of cloth gray level image on the long and narrow zone of each of holographic dry plate 10.Process by N width of cloth image being carried out subchannel, the integral hologram method for making that adopts second embodiment of the invention to provide can access the full color integral hologram.
The integral hologram method for making that third embodiment of the invention provides may further comprise the steps:
Step 1: sample, obtain the image of the M width of cloth different visual angles of three-dimensional body.The method of sampling here is identical with the method for sampling in the integral hologram method for making that first embodiment of the invention provides.
Step 2: above-mentioned M width of cloth image is carried out image process.
This image is processed minute two steps, and the conversion of at first carrying out horizontal direction realizes synthetic parallax, then carries out the vertical direction conversion and comes a minute Color Channel.The commutative sequencing of this two process, it is identical finally to obtain result.
See also Fig. 6, the conversion of at first carrying out horizontal direction realizes synthetic parallax.The method of the conversion of the horizontal direction of the step 2 in the conversion of the horizontal direction here and the integral hologram method for making that first embodiment of the invention provides li is identical.
Then need that the vertical direction image information is carried out subchannel and process, purpose is to realize the colouring information of three passages is just recorded by single exposure, and can reproduce full color.Known color of image subchannel method is taked in the division of color of image passage, and namely the RGB passage is exported respectively a width of cloth gray level image.The second image sequence (Y that the first step obtains
1, Y
2..., Y
N) will be outputted as three grayscale image sequence, be expressed as respectively (Y according to corresponding red, green, blue color
1r, Y
2r..., Y
Nr), (Y
1g, Y
2g..., Y
Ng), (Y
1b, Y
2b..., Y
Nb), for example be expressed as separately again as example take the width of cloth wherein
Wherein
Deng landscape images row of expression.(Y is got in this step conversion exactly
1r, Y
2r..., Y
Nr), (Y
1g, Y
2g..., Y
Ng), (Y
1b, Y
2b..., Y
Nb) in a landscape images row of each width of cloth, more per three landscape images row are formed the new gray level image of a width of cloth, this image background is black, only being kept at a certain distance away by three horizontal slices arranges and forms, this new images can be expressed as: Z
K1=(y
Kr1, y
Kg1, y
Kb1), and with (Y
1, Y
2..., Y
N) all carry out conversion after, will obtain the two-dimensional array (Z of a gray level image
11... Z
1h, Z
21... Z
2h..., Z
N1... Z
Nh), the number of pixels that wherein comprises in the number of h and each landscape images row all depends on the transverse width dimension of each pixel when synthetic hologram is taken, and is similar to the width dimensions of slit in the known two-dimentional rainbow holography method.
Through above twice conversion, with original one group of original two dimensional color image sequence (X that is formed by M width of cloth image
1, X
2..., X
i... X
M) split the two-dimensional array (Z be combined into a gray level image
11... Z
1h, Z
21... Z
2h..., Z
N1... Z
Nh), the vertical information pointer of this array is to synthetic parallax, and laterally information pointer has h * N width of cloth image to Color Channel.
In the present embodiment vertical direction image information being carried out the purpose that subchannel processes is just can record simultaneously RGB triple channel information for the laser that can adopt a kind of color.Image transform processes is simple, is only splitting and reorganizing conversion in method, yet for the integral hologram image pickup method that laser interference is printed, has extremely important effect, directly affects stereoscopic sensation, pattern distortion and the color reproduction of integral hologram.Need to prove, can comprise one or more pixel columns in the above-mentioned landscape images row.
Step 3: the h that obtains after above-mentioned image processed * N width of cloth recording image allows the information of each long and narrow regional record comprises photo X on the holographic dry plate 10 to N long and narrow zone of holographic dry plate 10
1-X
MIn image column of each photo and the colouring information of this image column.Concrete, by image sequence (Y
1, Y
2..., Y
N) in each image process the h width of cloth image that obtains through minute Color Channel of vertical direction conversion and can be recorded on the long and narrow zone on the holographic dry plate 10.
After realizing once recording three passages of RGB, can reproduce coloured image, at first need the angle of diffraction of transmission hologram is carried out strict calculating.By the record angle of design thing light and reference light, can control the diffraction direction of color of light when reproducing.See also Fig. 7, principle according to rainbow hologram, thing ginseng angle when inciding on the holographic dry plate 10 by three passage light of control RGB, it is the record angle of thing light and reference light, can be at specific direction (in the certain angle scope, such as human eye position among Fig. 7) observe the true colors 3-d reproduction picture of the original, namely the mode with a kind of pseudocolor encoding has reached the effect that true color is reproduced.In order to allow human eye observe the reproduction picture of three-dimensional body true colors in roughly vertical with holographic dry plate 10 position, the thing ginseng angle when three passage light of RGB incide on the holographic dry plate 10 meets the following conditions:
Wherein, θ
r, θ
g, θ
bThing ginseng angle when inciding on the holographic dry plate 10 for three passage light of RGB; λ
0Be the recording laser wavelength; λ
r, λ
g, λ
bWavelength corresponding to RGB light; α is the angle of the vertical line of reference light and holographic dry plate 10.
See also Fig. 8, the index path that adopts in the index path that adopts in the integral hologram method for making that present embodiment provides and the integral hologram method for making that first embodiment of the invention provides is compared, many light deflection elements 8, this light deflection element 8 is used for three equal deflections of passage light of RGB are shone the square hole of square hole baffle plate 9, and above-mentioned formula 1 is satisfied at the thing ginseng angle when making three passage light of RGB incide on the holographic dry plate 10.
Described light deflection element 8 can be lens or holographic optical elements (HOE) etc.In the present embodiment, this light deflection element 8 is a holographic optical elements (HOE).Have three gratings that be arranged in parallel on this holographic optical elements (HOE), these three gratings are respectively applied to the light of three passages of deflection RGB, and these three gratings meet the following conditions:
Wherein, d
r, d
g, d
bBe respectively the grating constant of the grating of three passages of corresponding RGB; λ
r, λ
g, λ
bWavelength corresponding to RGB light; α is the angle of the vertical line of reference light and holographic dry plate 10.Because the value of α desirable 0 to 90 is spent in theory, therefore, three gratings that can be used in the holographic optical elements (HOE) in the present embodiment should satisfy:
Because generally between 30 degree were spent to 60, preferably, three gratings in the described holographic optical elements (HOE) satisfied the value of α:
Described holographic optical elements (HOE) is specifically made light path as shown in Figure 9, directional light behind collimation lens 5 collimations is as reference light, the light that is reflected by beam splitter 3 is as thing light, and this thing light diffuses out from the rectangle aperture in the frosted glass 13, finally forms interference with reference light.Be made into holographic optical elements (HOE) through overexposure, development, photographic fixing, bleaching, its three gratings as shown in right in Figure 9.
Identical in the process that sampling and image are processed in the integral hologram method for making that fourth embodiment of the invention provides and the integral hologram method for making that the 3rd embodiment provides, the difference of the integral hologram method for making that it provides from the 3rd embodiment be with obtain after the image processing h * N width of cloth recording image is different to the mode on the holographic dry plate 10.See also Figure 10, in the present embodiment, adopt liquid crystal display 15 to come Alternative digital micro-reflector 6 as spatial light modulator.The light of laser instrument 1 outgoing can be reflected mirror 2 and reflex on the beam splitter 3, and beam splitter 3 is divided into two bundles with the light of laser instrument 1 outgoing, and is a branch of for as with reference to light, another Shu Zuowei thing light.This thing light is imported in the light guide plate 14, as the light source use of liquid crystal display 15.Described h * N width of cloth image can be presented on the liquid crystal display 15 successively, relative position by the square hole on control liquid crystal display 15 and the square hole baffle plate 9, so that above-mentioned formula 1 is satisfied at the thing ginseng angle of three passage light of RGB when inciding on the holographic dry plate 10, when the integral hologram that so obtains reproduces, can allow human eye observe the reproduction picture of three-dimensional body true colors in roughly vertical with holographic dry plate 10 position.
Need to prove, the effect of the digital micro-mirror 6 among above-mentioned liquid crystal display 15 and the present invention the first to the 3rd embodiment all is to show image as spatial light modulator, therefore, the digital micro-mirror 6 among the present invention the first to the 3rd embodiment is all replaceable is liquid crystal display 15.
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change the protection domain that all should belong to claim of the present invention with distortion.
Claims (10)
1. an integral hologram method for making may further comprise the steps:
Sample, obtain the image of the M width of cloth different visual angles of three-dimensional body or three-dimensional body subregion;
Above-mentioned M width of cloth image is handled as follows: above-mentioned M width of cloth image is organized as the first image sequence, every width of cloth image in the first image sequence is split as N vertically image column, from the first image sequence, extract again an image column in every width of cloth image out and form the new image of a width of cloth, obtain thus having the second image sequence of N width of cloth image; And
Image after the above-mentioned processing is exported successively and is recorded to by spatial light modulator on N the long and narrow zone of holographic dry plate, obtain the integral hologram of three-dimensional body or three-dimensional body subregion.
2. integral hologram method for making as claimed in claim 1 is characterized in that, described three-dimensional body comprises actual three-dimensional body and virtual three-dimensional object.
3. integral hologram method for making as claimed in claim 1 is characterized in that, described spatial light modulator is digital micro-mirror or liquid crystal display.
4. integral hologram method for making as claimed in claim 1, it is characterized in that, M width of cloth image is being carried out in the processing procedure, also further the N width of cloth image in the second image sequence being carried out subchannel processes, corresponding RGB triple channel is exported respectively one group of gray level image, recording image after will processing adopts the redgreenblue laser instrument that the gray level image of respective channel is recorded on the holographic dry plate successively to the N of holographic dry plate the long and narrow zone the time.
5. integral hologram method for making as claimed in claim 1, it is characterized in that, M width of cloth image is being carried out in the processing procedure, the vertical direction image information is carried out subchannel to be processed, further every width of cloth image segmentation in the second image sequence is become a plurality of landscape images row, the RGB triple channel gray level image of each landscape images row is formed a new gray level image, this new gray level image background is black, only kept at a certain distance away by the RGB triple channel gray level image of landscape images row and arrange and form, recording image after will processing is to the N of holographic dry plate the long and narrow zone the time, and the information that every width of cloth image is corresponding in the second image sequence can be recorded on the long and narrow zone of holographic dry plate.
6. integral hologram method for making as claimed in claim 5, it is characterized in that, recording image after will processing is to the N of holographic dry plate the long and narrow zone the time, and in the described new gray-scale map, the thing ginseng angle when RGB triple channel light incides on the holographic dry plate meets the following conditions:
Wherein, θ
r, θ
g, θ
bThing ginseng angle when inciding on the holographic dry plate for three passage light of RGB; λ
0Be the recording laser wavelength; λ
r, λ
g, λ
bWavelength corresponding to RGB light; α is the angle of the vertical line of reference light and holographic dry plate.
7. integral hologram method for making as claimed in claim 6 is characterized in that, described RGB triple channel light is recorded on the holographic dry plate after by a light deflection element.
8. integral hologram method for making as claimed in claim 7, it is characterized in that, described light deflection element is a holographic optical elements (HOE), have three gratings that be arranged in parallel on this holographic optical elements (HOE), these three gratings are respectively applied to the light of three passages of deflection RGB, and these three gratings meet the following conditions:
Wherein, d
r, d
g, d
bBe respectively the grating constant of the grating of three passages of corresponding RGB; λ
r, λ
g, λ
bWavelength corresponding to RGB light; α is the angle of the vertical line of reference light and holographic dry plate.
9. integral hologram method for making as claimed in claim 8 is characterized in that, three gratings in the described holographic optical elements (HOE) satisfy condition:
10. integral hologram method for making as claimed in claim 1 is characterized in that, described integral hologram method for making also comprises: the integral hologram splicing of a plurality of three-dimensional bodies subregion is obtained a complete three-dimensional body integral hologram.
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| CN102938229A (en) * | 2012-09-18 | 2013-02-20 | 中国人民解放军装甲兵工程学院 | Three-dimensional digital holography photon map |
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