CN105259664B - A kind of optical field imaging printing equipment and the film with three-dimensional floating image - Google Patents

Abstract

The present invention proposes a kind of optical field imaging printing equipment and by the optical field imaging printing equipment and the lenticule film with three-dimensional floating image for preparing, scanned using scanning galvanometer system on lens face, with reference to the change of 3 d space coordinate to realize that four-dimensional light field data prints.Optical field imaging printing equipment includes light source, scanning galvanometer system, lens, diffusion sheet, convergent lens group and lenticule recording materials, light is scanned through galvanometer system, lens, diffusion sheet with assembling lens group successively, export the focal beam spot of transient behavior, volumetric pixel radiation light field is obtained, then instantaneous body pixel radiation field information is recorded by the lenticule recording materials.The present invention can realize more real Three-Dimensional Dynamic sense image, by controlling different variate-values, realize the floating image of a variety of different qualities, it is ensured that realize that such as various visual angles become the imaging effect of figure.

Description

A kind of optical field imaging printing equipment and the film with three-dimensional floating image

Technical field

The present invention relates to optical field imaging field, more particularly to a kind of optical field imaging printing equipment and there is three-dimensional floating image Film.

Background technology

Real three-dimensional body why can by, it could be observed that be because object sends luminous energy to space, can So that object is considered as the set with many luminous spot lights, each spot light is referred to as an individual pixel of object.People When observing three-dimensional body, actually the spatial positional information of each volumetric pixel of the object and every individual pixel point institute are being obtained The directional information to emit beam.Based on principles above, optical field imaging theory thinks, a three-dimensional body is expressed on two dimensional surface Information, at least needs four independent variables, i.e. three-dimensional coordinate variable x-y-z and direction variable θ, and light field is defined as institute in space There is the set of the four parameters light radiation degree function L (x, y, z, θ).

Optical field imaging technology can trace back to the integral photographic art (Integral that French scientist Lippmann in 1908 proposes Photography, IP), this method obtains the light field of three-dimensional body using the recording materials for being covered with lenticule or pinhole array Information.The light that real-world object is sent into the real image of diminution and makes the photosensitive layer exposure of photographic negative by microlens array, by It is different in residing locus, each lenticule from different visual angles to image objects, thus the final institute of photographic negative into Seem by the synthesized image of each lenticule imaging.After photographic negative development, watched by the microlens array on egative film Synthesized image, according to path reversal principal, observer can be appreciated that the 3-d reproduction of captured scene, and the 3-d reproduction picture regards Feel effect as being suspended on egative film.Because microlens material is that object is noted down from different directions, that is, have recorded with regarding The subject image of difference.During reproduction, if observer changes orientation, lenticule is continuous trickle by generation to the observation visual angle of two Change, can visually form Spatial distributions three-dimensional floating imaging effect.

Based on the laser printing technology of optical field imaging principle, three-dimensional body volumetric pixel spoke is simulated using convergent laser focus point Light field is penetrated, and the field information is obtained by microlens array film material.Regulate and control different incidence angles using light, mechanical, electrical device Degree, the convergence light of different focal heights, the image of input word, two dimension or three-dimensional, reproduction have Different Dynamic depth of field image. Such technology mainly includes the acquisition for designing and producing and simulating some light fields of lenticule thin film recording material.

For lenticule recording materials, United States Patent (USP) US2326634 discloses one kind and transparent beads is partially submerged into polymerization In material adhesive layer, then at the polymeric material back side plate the aluminium film of 80nm left and right thicknesses.The section bar material is by transparent beads pair Incident field is focused, and focal spot energy reaches the damage threshold of aluminium film and ablation aluminium film, destroys the reflection of material at this Rate, so as to the reflectivity of background aluminium lamination difference, cause contrast different, that is, generate pixel.In order to obtain cromogram Picture, it is possible to use multilayered film material replaces single aluminium coated, when plural layers absorb different luminous energy and ablated into thickness When spending uneven embossment structure, the image of colour is presented based on film interference principle.As retouched in United States Patent (USP) US3801183 State, use ice crystal/zinc sulphide (Na3 AlF6/ZnS) double membrane structure, or chromium/polymer/silica/aluminium multilayer Film, more film layer structures refer to patent CN200880106663.4.The exposed microballoon of above-mentioned material half is more easily damaged, and is caused again The decline of existing picture quality, Chinese patent CN201180053337.3 provide a kind of structure for protecting lenticule, and it will be transparent Microballoon is totally submerged within the adhesive layer, then coats 200um or so transparent material layer, the transparent material over the binder layer Layer can not only prevent microballoon from leaving position, can also obtain the durabilities such as splendid friction resistant, shock resistance, and the transparent material The bed of material can provide fabulous glossiness outward appearance for integral material.

Acquisition for simulation point light field, Chinese patent literature CN200880106663.4 describe the acquisition of a variety of light fields Scheme.Scheme one, it is that the diameter of parallel laser light source is contracted to by about 1mm by optical system, is radiated at about 5mm ceramics On globule, the light field of diffusion is obtained using the scattering process of shaggy ceramic bead, coordinates the x-y-z space of recording materials The movement of coordinate records the light field data of three-dimensional body.Scheme two, produced a little using the converging parallel laser beam of lens Light field.This method expands hot spot by diffusion sheet, is obtained by colimated light system and expands light beam, convergence or concavees lens with convex lens Diffusion function, produces the point light field with focusing effect, and the light field is to represent an individual pixel of object to be printed.Pass through X-y platforms where moving recording material to change the relative tertiary location of volumetric pixel, can direct write enter a width X-Y scheme information, Fit through the height for changing plus lens again, then can obtain the volumetric pixel locus of different depth information, so as to, by by The mode of layer scanning and printing realizes floating graphic.Scheme three, propose using laser beam irradiation microlens array surface, by big numerical aperture The lenticule in footpath is reflected to light beam, then the light beam of this diverging, the point light field assembled are collected by convex lens.Pass through simultaneously The scanning movement luminous point of galvanometer, so as to the direct print image information on recording materials.

Chinese patent literature CN201310291009.8 is scanned using galvanometer on convergent lens, utilizes convergent lens Refraction obtains the light of different incidence angles, is placed around large-numerical aperture microlens array in lens focal plane, utilizes lenticule Deviation light beam, the point light field spread.The spot light is suspended in recording materials surface all the time, in order to obtain the meeting of sinking Accumulation light field, point out that a convex lens can be placed between microlens array and recording materials in patent, collect the luminous energy spread, And it is focused on the lower section of recording materials, so as to which what can be sunk is printed as picture.Because the frequency of vibration mirror scanning is very high, Each scanning ray can be focused on same point by extremely short time interior len, and a dynamic can be instantaneously produced in the focal plane of lens Focused light spot, than patent CN200880106663.4 single beam pool picture, the angle of visual field for reproducing image, figure can be increased As dynamic sense is stronger.

Chinese patent literature CN200880117941.6 is disclosed one kind and can carried out using lenticule recording materials master mold The technology that high-volume replicates.This method still obtains convergence light field using the optical system of the converging parallel light of lens, and in text The master mold material recording layer is no longer above-mentioned aluminium or multilayer film, but coats the material layer with photopolymerization, the material layer Single photon, two-photon even Multiphoton Absorbtion can occur for femtosecond laser light source, to cause the polymeric material that local thing occurs Reason, the change of chemical characteristic, such as the material of local attribute change cannot be dissolved by organic solvents such as ethanol, and not absorb The material part of photon can then dissolve, and embossment structure will be presented in the material after being so dissolved, so as to have recorded the letter of image Breath.A series of solidifications are carried out to this embossment structure so that the master mold with the deformation of certain resistance to mechanical is made, it is mature micro- using industry Reproduction technology, as volume to volume imprints, it is possible to achieve mass production.

It is different that the method with three-dimensional floating image film is made in above-mentioned patent, especially simulates obtaining for point light field Take device different, cause the floating image observable visual angle of film reproduction and dynamic range of observation different, though respectively have Advantage, but shortcoming is also apparent from.As described in scheme one in patent CN200880106663.4, acquired volumetric pixel size is at least For the diameter of laser beam, image quality resolution ratio when causing to reproduce is low.And described in scheme two, due to laser beam intensity Distribution belongs to Gaussian Profile, this method for carrying out expanding focusing to single beam laser so that the light that recording materials face is collected into Energy density unevenness, it is difficult to control various point locations to be attained by the modification energy threshold of recording materials, so as to, it is impossible to effectively utilize light Can, cause the numerical aperture of the pyramid type point light field of acquisition small, observation visual angle when influenceing to reproduce.Although image have suspension or under Sinking is felt deeply, but because the angle of visual field is smaller, thus dynamic sense is weaker, and the system does not have variable " azimuth " variable, does not have The ability of different graphic is inputted under the standby different angles of visual field, printing model is single.Scheme three requires that scanning light spot is aligned with lenticule Accurately, otherwise, when laser beam is moved to the border of two lenticules, its reflective functions weakens, it is possible to light beam is divided into two, Imaging arrangement is influenceed, during beam spot scans to edge, there will be the capture range that some light deviates lens, and reduce capacity usage ratio, System value aperture and the angle of visual field are reduced, because the program only relies on vibration mirror scanning to project the location of pixels of input picture, by In final light propagated along the exit direction of galvanometer, but the deviation Jing Guo optical system, imaging point deviate default position Put, it is no longer preferable picture to cause to be ultimately imaged, for example is distorted.Meanwhile its printing various visual angles graphic procedure for being described, first by being System provides the convergence light field of an incident angle, keeps this incident angle, and visual angle figure is realized by mobile x-y platforms Input, then the convergence light field of another incident angle is provided by system, repeat mobile x-y platforms and input another visual angle figure, no Light efficiency is low, and the problem of each visual angle light is accurately aligned with same position be present.Patent CN201310291009.8 institutes The method of use, final or reflecting to obtain by microlens array assembles light field, the drawbacks of above-mentioned patent equally occurs, together When, because lens only focus in one-dimensional square, cause the loss of other azimuth informations, image is presented only in one-dimensional square On have an innervation, need to first calibrate light path to obtain required visual angle, then input viewing angle figure when multi-view image is inputted in scheme, then weigh Another visual angle light path is newly calibrated, then inputs another width picture, repeats this program, until exporting whole visual angle figures.It is obvious that so Scheme not only efficiency is low, and input several visual angle figures in same position, need each operation can be accurately right to the position Standard, add complexity.

There is the function of the same object from both direction simultaneously for binocular vision system, object is respectively in retina Shang Zuo two-dimensional projections, two width parallax perspective views are synthesized by brain, produce stereoeffect.Each surface of true three-dimension object The radiated light field of point has the characteristics of taper diffusion, and the angle α scope of the cone of radiation can be from 0-360 °, and angle is bigger, Illustrate that the angle of visual field that this object point can be observed is bigger.Laser printing optical field imaging system synthesizes three-dimensional body using convergent laser Light field, its focus point correspond to an individual pixel of object, and the analogue body pixel optical field characteristics obtained in scheme are each above Differ, the effect thus, during reproduction observed is also different.For example numerical aperture is different, causes regarding for dynamic observation image Rink corner varies.Numerical aperture is bigger, and the angle of visual field is bigger, and dynamic sense is stronger, so, how to synthesize the body image of large-numerical aperture Plain light field, it is that this patent needs to solve the problems, such as.

Certainly, another center of gravity that synthesized field information is this specialty how is recorded.Three-dimensional article is recorded using two dimensional surface Body, during reproduction, it would be desirable to just as on the spot in person, continuously observe this object from different perspectives, this requires material maximum The cone of radiation light field that the record object each point of degree is sent.Further, because the information content of three-dimensional body is bigger than two dimension, It is desirable that same material area is able to record more rich information, that is, require that material has spatial reuse function, so see The person of examining can observe different image from different orientation.Laser light field imaging printing based on microlens array recording materials System meets simulation and the technical conditions of record simultaneously, and the picture of three-dimensional body is directly reproduced after the completion of can printing.

As it was previously stated, optical field imaging technology needs four independent variables to express a space three-dimensional object, according to The span of used variable can show different imaging effects.Optical field imaging technology described in existing documents and materials, only Three independent variables, and another dimension is constant.It is space coordinates x-y-z variables system as described in CN200880106663.4 patents System, direction angle variable θ is constant, so the system can obtain 3D depth images, and can not realize spatial reuse function, and due to The reason for above analyzing, 3D dynamics feel weak.And patent CN201310291009.8 is (x, y, z, θ) variable system, z is constant, Therefore, it is possible to input different X-Y schemes under different visual angles, and three-dimensional body can not be printed.

Therefore, industry needs a kind of film that can realize more true three-dimension dynamic sense image badly and has four-dimensional variable Optical field imaging printing equipment, the floating image of a variety of different qualities can be realized by controlling different variate-values.Ensuring can Realize that such as various visual angles become the imaging effect of figure, and can obtains the three dimensional viewing experience of more real-world object.For example realize 360 ° Panorama floating image and stronger dynamic effect.Different images can be also printed from the different angles of orientation, preparation has space The stereo-picture film of multiplexing.

The content of the invention

In view of this, the present invention proposes a kind of four-dimensional variable optical field imaging printing equipment, and passes through the four-dimensional variable light Imaging printing equipment and the lenticule film with three-dimensional floating image prepared.

Four-dimensional variable optical field imaging printing equipment includes light source, scanning galvanometer system, collecting optics component, lenticule record Material and the axle mobile platforms of x-y-z tri-, wherein collecting optics component include controllable rotating post lens, and recording materials are placed in movement On platform, light source is scanned by scanning galvanometer on controllable rotating post lens arc surface, is ultimately formed with large-numerical aperture Light field is assembled, the convergence light field makes the recording layer by the recording layers of each micro lens to thin-film material, the energy of focusing It is modified to provide a pixel, mobile x-y-z platforms change the locus of lenticule recording materials, then the convergence light field can Multiple pixels are formed on the recording layer behind each lenticule, these pixels constitute the subgraph behind each lenticule Picture, during reproduction, subgraph associated with it is refracted to aerial image by each lenticule, synthesizes floating image jointly.Subgraph Correspond to different angulars field of view, so can from the different visual angles of film composograph, with the movement of observer, institute There is dynamic effect depending on composograph.

Lenticule film is prepared by above-mentioned four-dimensional variable optical field imaging printing equipment, and it have recorded one or more things The field information of body, and the image for suspending or sinking relative to material surface can be reproduced, these images are by lenticule pair Thin-film material into intensified image composition composograph, these suspend or sink composographs be referred to as floating image.Float Image can be two dimensional image or 3-D view, and it can be black and white or colored, and floating image looks like aobvious Three-dimensional depth image on or below present thin-film material top, plane, can also look like from a depth to another depth The 3-D view of consecutive variations.Floating image has visual angle change characteristic, and observer can with the naked eye watch, and can be with Observer is mobile and changes.Lenticule thin-film material in the present invention reproduces image, and not only observable visual angle is big, image dynamic is felt By force, and its visual angle also has the characteristic of face domain orientation, i.e., a certain reproduction image can be dynamically observed in some oriented surface, And then another different image can be reproduced in same position in another oriented surface, different oriented surfaces is by angle of orientation θ come table Sign, 0-360 ° of its value are continuous optional.

The present invention, the floating image of a variety of different qualities can be realized by controlling different variate-values.Ensuring can be real Now such as various visual angles become the imaging effect of figure, and and can obtains the three dimensional viewing experience of more real-world object.For example realize 360 ° of weeks Depending on floating image and stronger dynamic effect.Also different images can be printed from the different angles of orientation, prepare and answered with space Stereo-picture film.

According to the purpose of the present invention propose a kind of optical field imaging printing equipment, including light source, scanning galvanometer system, thoroughly Mirror, diffusion sheet, convergent lens group and lenticule recording materials, the scanning galvanometer system include galvanometer and f-theta lens, The lens are placed in the focal plane of f-theta lens, and the diffusion sheet is placed on the focal plane of lens, and diffusion sheet is with assembling The upper end of lens group keeps one section of adjustable distance, and the light source launches laser, light be scanned through successively galvanometer system, lens, Diffusion sheet exports the focal beam spot of transient behavior, obtains volumetric pixel radiation light field, then remembered by the lenticule with assembling lens group Record material record instantaneous body pixel radiation field information.

Preferably, the lenticule recording materials include microlens array and the photaesthesia below microlens array Layer, the microlens array is by the array that clear aperature and relief depth are that micron-sized lens form, the light-sensitive layer It is that a kind of irreversible light becomes material.

Preferably, the light source transmitting laser, scanned galvanometer system emergent ray, makees linear scan in lens surface, Scanning ray cluster is formed, after lens, scanning ray cluster is focused at the diffusion sheet surface, and is scattered, described to assemble thoroughly Microscope group is collected convergence to light beam.

Preferably, when printing three-dimensional body, x-y-z platforms where the mobile lenticule recording materials obtain difference The volumetric pixel of locus.

Preferably, the volumetric pixel radiation light field control by four Independent Parameters, including three dimensional space coordinate variable and saturating Mirror is orientated angle variable, between variable can free valued combinations, by four-dimensional variable drop into three-dimensional or two dimension.

Preferably, the z-axis height of the fixed lenticule recording materials, and the angle of orientation of fixed lens, lenticule note Platform where record material only makees the movement in x-y directions, then four-dimensional volumetric pixel light field expression is reduced to two dimension, and thus printing has more The suspension at visual angle or consecutive variations visual angle or the two-dimension light field figure of sinking, it is grand using galvanometer scanning system, directly output one Pixel, the grand pixel include the sub-pixel of many different visual angles, and each sub-pixel correspond to various visual angles figure to be entered Pixel.

Preferably, the lens from post lens, the symmetrical spherical lens of circle, focusing power more preferably and numerical aperture and post Non-spherical lens that lens match, there is one kind in the compound lens of aberration correction.

Preferably, the lens select post lens, and the numerical aperture of post lens is between 0.3~0.95, to incident ray Focused in one-dimensional square, another direct transmitted ray of dimension, the light beam for continuing to propagate by convergent point spreads into sector domain.

Preferably, the post lens rotate around the Z axis of its own geometric center, and the anglec of rotation of post lens determines sector Domain radiates the angle of orientation of light field, and when using a certain angle of orientation definite value printing 3 d light fields data, observer can only be orientated herein Image is observed in the sector at angle, when deviateing this angle of orientation, then picture drop-out or is observed in the oriented surface after deviation Image.

Preferably, the lens select spherical lens, horizontal symmetry axis of the scanning galvanometer system along spherical lens Dimension linear scans, and convergent lens group output end obtains sector domain volumetric pixel radiation light field.

The present invention also proposes a kind of film with three-dimensional floating image, as the light any one of claim 1-9 It is prepared by field imaging printing equipment, it is characterised in that：The field information of one or more objects is have recorded, reproduce relative to film Surfactant suspension or the floating image of sinking, the floating image are synthesized by the subgraph of multiple different visual angles, can be from different spaces View arrives.

Preferably, the image observed in an oriented surface, it is the various visual angles figure or several different figures of same object Picture, when deviateing the oriented surface, then picture drop-out or observe deviate after oriented surface in image.

Preferably, the floating image is two dimensional image or 3-D view, and when being 3-D view, floating image is to be apparent in The three-dimensional depth image of film top, thin film planar or lower section, or from a depth to the graphics of another depth consecutive variations Picture.

Compared with prior art, the present invention has following technical advantage：

(1) printout of 3D object datas is realized in proposition with four-dimensional light field parameter, quantitative using four-dimensional variable parameter All light ray energies that the object is radiated are described, i.e., light field can quantitative expression, to the understanding of light field from different perspectives, Ke Yiyong Different four-dimensional parameters characterizes, such as a light intersects with two parallel planes, and two position of intersecting point are four variables, Also light field data information can be characterized with three spatial coordinates variables and one-dimensional anglec of rotation variable.And existing integration imaging is theoretical It is not relevant for which state modulator the field information that microlens array material is captured is by.But in the present invention, use convergence The print system of laser analog object volumetric pixel light field, radiation light field can accurately be controlled by parameter, more with practical value.

(2) present invention can provide more abundant printing model, for four-dimensional variable optical field imaging printing equipment, Ke Yigu Fixed wherein some parameters are definite value, or it is limited centrifugal pump to take some parameters, then can print successively high with big visual field Dynamic two dimension or 3-D graphic.And from the graphic rendition result of anticipation, the reverse print parameters for considering to remove initialization system, think Road is clear, is not easy confusion.It is more estimable, because post lens only focus in one-dimensional square, when setting post lens The angle of orientation for some discrete definite values when, different graphical informations can be inputted respectively, realize the multiple utilization of material the same space. The spatial reuse function of material is not provided in existing technical scheme.

(3) present invention can efficiently realize light field data print, because the grand pixel light field at certain locus be substantially by The sub-pixel light field composition at many incident visual angles of difference that vibration mirror scanning obtains, these sub-pixel light fields represent in a cycle The Pixel Information of the multiple image same position of different visual angles, and due to the high frequency sweep of galvanometer, can be within the extremely short time just Input and the record of the sub-pixel set are realized, carries out the input of grand pixel light field and record of the next position successively, you can complete The printing of various visual angles figure, continuously scanned because galvanometer can make high frequency, thus the present invention can also efficiently be inputted and connected with visual angle The figure of continuous change, can not realize same effect in the prior art.

(4) the imaging viewing field angle in the present invention is big, dynamic sense is strong.Because laser beam intensity Gaussian distributed, in energy Between close edge dredge, Gaussian beam reaches the light field energy on lenticule recording materials surfaces after the optical system of apparatus of the present invention Still not enough uniformly, due to the limitation of material energy threshold value, not every luminous energy can make material modification for amount distribution, thus will The effective numerical aperture of the convergence light field is reduced, so that the angle of visual field is reduced, reduces dynamic sense when observation reproduces figure.And this In invention, using vibration mirror scanning so that be evenly distributed by the incident optical energy of the different angles of visual field behind lens group, although monochromatic light The imaging point of the beam angle of visual field belongs to small field of view imaging, but by the grand picture for scanning outgoing light combinations and obtaining of many small angles Element has the characteristics of big visual field high dynamic, the physical dimension of this grand pixel depending on galvanometer post lens surface scanning distance, Post lens numerical aperture and light channel structure design, numerical aperture is bigger, and closer to the post focal length of lens, grand Pixel Dimensions are smaller, then Existing figure is more clear.

(5) lenticule film reproduces floating image and can synthesize by the subgraph of multiple different visual angles, and synthesizing floating image can be with To be observed from different spatial views, the image observed by some oriented surface can be the various visual angles figure of same object, It can also be several different images, when the deviation oriented surface, then picture drop-out, or observe in the oriented surface after deviateing Image.

(6) the post lens of large-numerical aperture, can be rotated around its own optical axis, the anglec of rotation of post lens determines taking during observation To angle, i.e. the anglec of rotation of post lens provides an independent variable θ of four-dimensional light field.

(7) laser beam is scanned on post lens arc surface to obtain the sector domain volumetric pixel incident field of transient behavior, The arc surface of post lens may be designed in other symmetrical secondary curved surfaces with one-dimensional focusing.Post lens 4 can use circle symmetrical Spherical lens, or focusing power is more preferably and the non-spherical lens that matches of numerical aperture and post lens, or with aberration correction Compound lens substitutes, when horizontal symmetry axis dimension linear of the scanning galvanometer system along spherical lens scans, convergent lens group Output end can also obtain sector domain volumetric pixel light field, and horizontal symmetry axis of the control ray trajectory along different orientation scans, Therefore the printing model in the present invention can be also realized without machinery rotation.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.

Fig. 1 is lenticule recording materials side view

Fig. 2 is lenticule recording materials profile

Fig. 3 is the record object field information schematic diagram on lenticule recording materials

Fig. 4 is that lenticule film passes through reflection environment light reconstructed object floating 3-D view schematic diagram

Fig. 5 is space coordinates fixed setting and the signal of rotatable post lens of Independent Parameters in optical field imaging printing equipment Figure

Fig. 6 is optical field imaging printing equipment schematic diagram

Fig. 7 is that optical field imaging printing equipment prints several visual angles diagram intention

Fig. 8 is the close-up schematic view that optical field imaging printing equipment prints several visual angle figures in Fig. 7

Fig. 9 is lenticule film various visual angles observation schematic diagram

Figure 10 is the lenticule film characteristics schematic diagram for having three-dimensional floating image, i.e., under lenticule film different orientation angle It was observed that the schematic diagram of different objects

Figure 11 is that 360 ° of panorama dynamic viewing films show three-dimensional floating object schematic diagram

Figure 12 is sub-pixel group into grand pixel schematic diagram

Figure 13 is the schematic diagram for substituting post lens in optical field imaging printing equipment with circle symmetric focus lenses

Figure 14 is scanning galvanometer system sweep trace orientation schematic diagram in circle symmetric focus lenses

Figure 15 is that lenticule film reproduces dynamic line schematic diagram

Embodiment

As described in the background art, in the prior art, the three-dimensional floating image film produced, have reproduce when into As the shortcomings of mass resolution is low, the efficiency of light energy utilization is low, printing model is single, complexity is high, therefore, the present invention proposes there is four The optical field imaging printing equipment of variable is tieed up, the film that more true three-dimension dynamic feels image can be prepared, it is different by controlling Variate-value, realize the floating image of a variety of different qualities, it is ensured that the imaging effect of such as various visual angles change figure can be realized, and can obtains The three dimensional viewing experience of more real-world object is obtained, different images can be also printed from the different angles of orientation, preparation have spatial reuse Stereo-picture film.

Below, the concrete technical scheme of the present invention will be described in detail.

It is the side view and sectional view of lenticule recording materials 1 respectively please also refer to Fig. 1~Fig. 2, lenticule record material Material 1 includes the microlens array 11 for overlaying on top and the light-sensitive layer 12 of the lower section of microlens array 11, microlens array 11 be by Clear aperature and the array that relief depth is micron-sized lens composition, it not only has the bases such as focusing, imaging of conventional lenses This function, and with the characteristics of unit size is small, integrated level is high, the cycle of generally each lens is between 20 μm -200 μm. Lenticule can have multi-form in itself, and such as circular plano-convex lenslet, circular biconvex lenslet, microsphere or globule shape are small Mirror.Making the material of lenticule includes glass, polymer, ore, crystal, semiconductor and these materials and other materials Combination.

Light-sensitive layer 12 is that a kind of irreversible light becomes material, this after more than the illumination of its surface threshold energy Material can occur to include color or qualitative change.These materials include metal, metal oxide, polymer, semiconductor material Material and the plural layers being made up of these materials.For example plating aluminum heat absorption evaporation or some macromolecule polymer materials exist Laser irradiation lower surface blacks, and so as to cause material to be modified, produces contrast change with former base bottom materials, that is, generates pixel. When beam of laser is after microlens array 11 forms some images on light-sensitive layer 12, by microlens array 11 to pixel The trickle change of light so that regenerated pattern, which looks, the dynamic effect for floating or sinking.

Light source 2 provides laser irradiation, and light source 2 is optical fiber laser either semiconductor pumped solid-state laser or accurate point Sub- laser, mix rubidium yttrium-aluminium-garnet (abbreviation Nd：YAG) laser etc. has the laser of high-peak power.It is high by these The radiation source ablation recording layer of peak power forms pattern.And when light-sensitive layer 12 to be non-ablative as photochromic method is imaged When, can be using the LASER Light Source of the low peak powers such as laser diode, ion laser, gas laser.Utilize this hair Optical field imaging printing equipment in bright, parallel laser beam is modulated to what is assembled to different directions diffusion or to same direction Focus on light beam, to simulate the volumetric pixel radiation characteristic of real-world object.

Fig. 3 is referred to, Fig. 3 is the schematic diagram that object field information is recorded on lenticule recording materials.Record the stage, As shown in figure 3, by an individual pixel O of the laser facula simulating stereo model dissipated, the spatial light field letter that the pixel is radiated Breath is by microlens array material capture and records, because three-dimensional body can be considered the set of above-mentioned different spatial volumetric pixel, When we simulate the spatial light field of each individual pixel successively and record it, final achievable two-dimensional material records 3D object informations Purpose.It will be seen that each lenticule cans be compared to camera small one by one, from different locus pair from Fig. 3 The three-dimensional body is imaged, and due to being limited by the radiation space scope of simulation light field, single lenticule can only be to the part of the object Imaging, we by imaging behind each lenticule being called subgraph.It can be seen that it is exactly that these two-dimentional subgraphs are completed to three-dimensional The information decomposition of object.

Fig. 4 is referred to, Fig. 4 is that lenticule film passes through reflection environment light reconstructed object floating 3-D view schematic diagram.Figure Middle light 201a, 201b are the ambient light irradiated at random, 202 pixels recorded by lenticule recording materials in Fig. 3, 203a and 203b is refraction light of the lens to base material.Based on path reversal principal, subgraph image will be existed by microlens array Former locus projection imaging, the set of subgraph imaging are the reproduction of the three-dimensional body picture.Need exist for, it is emphasized that The thin-film material of the present invention not reproduce object merely with reflected light, by transmiting the equally reproducible object of light irradiation.Observing During this image, due to human eye can only the reception of part these subgraph array imagings, so can only be seen in a fixed viewpoint To the partial information of object, when observer's conversion is to the relative position of image forming material, such as material overturning up and down, Huo Zheyi The locus of dynamic observer, it is possible to see the information of the diverse location of object, that is, realize visible difference under different visual angles The dynamic three-dimensional body effect of object parts.

Analysis can be seen based on more than, and the convergent laser light field radiation characteristic of simulation plays important work to being ultimately imaged effect With.Including, the locus coordinate (x, y, z) (determining floating or sinking effect) of the focal beam spot of convergent laser, convergence The numerical aperture NA (size for determining the angle of visual field) of laser, especially in the present invention program, because post lens are only in one-dimensional square Deviation converging action is played to light upwards, the volumetric pixel radiation light field actually get is sector domain, rather than saturating using circle The cone that mirror obtains.So the angle of orientation θ of sector radiation light field rises when changing as independent variable to dynamic imaging effect The influence being even more important.Below by its effect of labor in embodiment.

The numerical aperture NA of laser printing optical system decides the size of the maximum Observable angle of visual field, you can at more big angles It can be seen that the picture of reconstructed object, NA is bigger in the range of degree, the angle of visual field is bigger, and dynamic sense is also stronger.Generally light Learn what system value aperture was to determine, i.e., numerical aperture is constant, then means the angle of visual field of each individual pixel of system simulation Scope is all equal, thus although the angle of visual field has certain span, but for using volumetric pixel, for description object, it is still It is considered constant.

The volumetric pixel light field radiation simulated in printing equipment of the present invention is controlled by four Independent Parameters, refers to Fig. 5, Fig. 5 Space coordinates fixed setting and rotatable post lens schematic diagram for Independent Parameters in optical field imaging printing equipment, arrange space Coordinate system is right-handed coordinate system, and x-y-z positive direction is as illustrated, 0 ° of post lens orientation angle is demarcated as x-axis positive direction, counterclockwise Rotate to be just, span is 0-360 °.

Referring to Fig. 6, Fig. 6 is optical field imaging printing equipment schematic diagram, and structural system shown in Fig. 6 includes lenticule recording materials 1st, light source 2, scanning galvanometer system 3, post lens 4, diffusion sheet 5, convergent lens group 6 and scanning ray cluster 7, scanning galvanometer system 3 Including galvanometer 31, galvanometer 32 and f-theta (f-theta) lens 33.As shown in fig. 6, post lens 4 are placed in f-theta lens 33 Focal plane near, diffusion sheet 5 is placed on the focal plane of post lens 4, and diffusion sheet 5 and the upper end of lens group 6 keep one section of adjustable pitch From.Because the focal length of f-theta lens 33 is longer, so it is collimated light beam visually to scan the light on the surface of post lens 4.The light Laser is launched by light source 2 first during field imaging printing equipment work, passes through computer software control scanning galvanometer system 3, passes through The emergent ray 7 of f-theta mirrors 33 makees the linear scan of high-frequency reciprocating on the surface of post lens 4, saturating by the accurate control column of computer Mirror 4 rotates, and ensures that light scanning direction keeps vertical with the optical axis of post lens 4 simultaneously, then by the one-dimensional deviation of post lens 4 Effect, the scanning ray cluster 7 are focused at the surface of diffusion sheet 5, due to random scatter effect of the diffusion sheet 5 to light cluster 7, have height The laser intensity of this distribution character is homogenized, while the angle of flare of light cluster 7 is also increased, by lens group 6 to light beam Converging action is collected, the focal beam spot V of an exportable transient behavior, that is, obtains individual pixel radiation light field, then by micro- Lenticular recording material 1 records this instantaneous body pixel field information.When printing three-dimensional body, mobile lenticule is controlled by computer X-y-z platforms where recording materials 1 obtain the volumetric pixel of different spatial, so as to be finally completed beating for 3D object light fields Imprinted.Four-dimensional variable in the present invention, including three dimensional space coordinate variable and post lens are rotationally oriented angle variable, can between variable Free valued combinations, four-dimensional variable is dropped into three-dimensional or two dimension.Wherein, the numerical aperture of post lens 4 0.3~0.95 it Between, incident ray is focused in one-dimensional square, the direct transmitted ray of another dimension, the light beam propagated is continued into sector by convergent point Spread in domain.The big I of the angle of visual field of dynamic observation image is calculated by the numerical aperture of convergent lens group.Calculation formula be φ= 2arcsin (NA), NA are the numerical aperture of convergent lens group 6, i.e. maximum field of view angle negates the 2 of sine value equal to numerical aperture Times.

Compared to the existing patent of invention described in background technology, optical field imaging printing equipment of the present invention mainly has two It is different.On the one hand, the present invention obtains the volumetric pixel of a transient behavior change by the way of linear scan is done on post lens 4 Assemble light field.Fig. 7 is referred to, Fig. 7 is the part single beam amplification for the light cluster 7 that galvanometer system 3 scans on post lens 4 Figure, because the laser beam of LASER Light Source transmitting can be considered the directional light with certain geometric diameter, such as optical fiber laser transmitted wave A length of 1064nm laser beams, diameter are about 8mm or so.Collimated light beam 71 is changed by emergent ray angle after post lens 4, Expanded through 5 even light of diffusion sheet and the converging action of lens group 6, the printing light beam 711 assembled, as light beam 71 is in post lens Continuous scanning to the position of light beam 73, printing light beam also is changed into printing light beam 731, i.e. incident beam from printing light beam 711 is continuous on 3 Angle continuously change, so can not only lift visual field scope, also achieve continuously adjusting for the angle of visual field.Fig. 8 is referred to, is schemed 8 be the enlarged drawing that light beam 711,721,731 is printed in Fig. 7, it can be seen that printing light beam 711,721,731 can inherently be distinguished Obtain focusing on picture point v1, v2, v3, each picture point that focuses on can be considered a sub-pixel, because the high frequency of scanning galvanometer system 3 is swept Retouch, when light beam 71 is from the surface scan of post lens 4 to 73 position, you can the sub-pixel of many corresponding different visual angles is obtained, this A little pixel forms a grand pixel of unit, i.e., the volumetric pixel V shown in Fig. 8 within the extremely short time.By such a The light field that volumetric pixel is radiated has following features：The angle of visual field is big, and photic-energy transfer is uniform, and imaging definition is high, 3D optical field imagings Dynamic sense it is strong.

On the other hand, post lens 4 can accurately rotate around the Z axis (i.e. optical axis) by its own geometric center, such as accompanying drawing 7 It is shown.Having been pointed out above, the anglec of rotation of this post lens determines the angle of orientation of sector domain radiation light field, so in four parameters Light field expression L (x, y, z, θ) in, θ variables are the anglec of rotation of this post lens, or the referred to as angle of orientation of post lens, and it takes It is 0-360 ° accurate adjustable to be worth scope.When using certain certain value θ printing 3D light field datas, observer can only correspond to orientation herein Sector in observe object picture, when deviateing this angle of orientation, for example, rotation 1 one angles of recording materials, this image general It can disappear.

Here, highlight the angle of orientation described herein and the two different concepts of the angle of visual field.The angle of visual field is defined as at some Different points of observation can be selected in plane, thus observation visual angle is varied from, such as observer shift position only in x-y faces To change visual angle, but if the visual angle that can vary in observer obvious if x-y faces are overturn, for example x-y is turned over Y-z plane is gone to, therefore, the flip angle for defining plane is the angle of orientation of the plane, in above concerning description, exactly because Column spinner lens can realize that the angle of orientation of viewing plane is different, thus observer not only can in the same plane change and regard Angle, visual angle can also be changed in Different Plane, its essence is visual angle parameter needs two-dimensional direction Variable Control, however, for this Literary laser print apparatus, conplane angle of visual field span all same, can be regarded as constant, only using the angle of orientation as change Measure to characterize visual angle parameter.

Four variable light field L (x, y, z, θ) print systems in the present invention, due to spatial coordinates variable x-y-z and post lens It is separate to be orientated angle variable θ, when a certain variable of fixation only changes other three variables printing 3D objects, reproduce many Unique 3D dynamic visual angle effects, will be described in detail in by several specific embodiments below.

Embodiment 1：

In optical field imaging printing equipment shown in Fig. 6, when being printed, fixed column lens 4 to a certain angle of orientation, calculate Machine control scanning galvanometer system 3, keeps laser to be scanned on post lens arc surface, passes through the body image obtained by convergent lens group 6 Plain light field is the sector at a fixed orientation angle, and is recorded by lenticule recording materials 1.According to input 3D model datas, control X-y-z platforms where lenticule recording materials 1 processed, by the way of level successively prints, realize the light field record of 3D objects. Because all volumetric pixel light fields of this 3D object are all the sector domain of the same angle of orientation, during reproduction, can only also be taken with this The object is observed into the set face at angle, the visible dynamic effect when observer continuously changes observation visual angle in this oriented surface Fruit.As shown in figure 9, observer in paper from the continuous transformation of visual angle 3 to the visible dynamic cube figure in visual angle 4, and when regarding When angle departs from paper, object will disappear.It is only capable of watching for a people so the 3D with this viewing angle characteristic reproduces, it is impossible to simultaneously Watched for more people, can be very good to protect the privacy of observer.

Embodiment 2：

In embodiment 1, volumetric pixel light field can be expressed as L1 (x, y, z), after completing 3D optical field imagings printing, rotation Rotary column lens 4, another 3D objects light field data L2 (x, y, z) can be inputted again by repeating above-mentioned printing flow, when post lens 4 rotate to The light field data Ln (x, y, z) of different 3D objects is sequentially input during different orientation angle.During reproduction, the principle such as institute of embodiment one Stating, observer can only observe different 3D printing objects successively in selected angle of orientation sector set face, as shown in Figure 10, When being orientated Angle Position, it is observed that cube model, the visible sphere model again when rotating recording materials to the angle of orientation. 3D with this viewing angle characteristic, which reproduces, is available for more people to observe different object informations from different directions, and it is same to realize recording materials The multi multiplexing in one space so that material information storage density increase.If such as 15 ° take an orientation at interval of an angle Angle, a 3D model is printed in each angle of orientation, these 3D models belong to a frame of dynamic change 3D video display, such as one Toy in running, or one rotation person model, then 0-360 ° of the angle of orientation can input 12 frame 3D renderings, work as observation When person quickly rotates lenticule recording materials 1 to change angle of orientation observation, because the visual angle of human eye persists effect, it is seen that dynamic 3D animation effects.It is pointed out that because human eye pupil is circle, only when observer's right-angle view directly over material, The graphical information at different orientation angle can be received simultaneously, and to avoid the generation of this visual angle crosstalk, observer should keep certain Observe at angle of inclination.Here, it is all three-dimensional to emphasize every two field picture, rather than two dimension, show that observer can be with different The not ipsilateral of same frame 3D objects is observed at inclination angle (i.e. the angle of visual field), adds the sense of reality of observation dynamic object.

Embodiment 3：

As the special case of embodiment 2, column spinner lens 4 cause angle of orientation consecutive variations, and are no longer discrete value.This In post lens 4 speed should be far below scanning galvanometer system 3 scan frequency, to ensure that post lens 4 are low in the anglec of rotation In in the time of 1 milli arc (i.e. 1mrad), scanning galvanometer system 3 remains able to complete on the arc surface of post lens 4 at least one complete The whole scan period.Assuming that the scan frequency of scanning galvanometer system 3 is T1, the speed of post lens 4 is T2, according to above-mentioned bar Part, then it should ensure that post lens 4 have rotated 1mrad time and be not less than 1/T1, so as to draw relational expression T2≤T1/ (2000 , it is computed, the speed of post lens 4 should be not more than 31Hz.Meet above-mentioned condition then by beating The volumetric pixel radiation of print system output can be considered four variable light field L (x, y, z, θ), and can be considered that some takes per individual pixel light field To 360 ° of rotating cones of angle sector.The high frequency sweep of scanning galvanometer system 3 and the rotation collective effect of post lens 4, can be with It is interpreted as, volumetric pixel is no longer single pixel, but the group of the sub-pixel by many corresponding different visual fields (in scanning direction) Close, synthesize micro- grand pixel of big visual field jointly, the position of the sub-pixel of the different angles of visual field is different, is closely packed together, lenticule record Material 1 is high to the imaging definition of small field of view light field, strong so as to the dynamic sense of 3D optical field imagings.As shown in figure 11, using this example Implementation prints a cube model, and during reproduction, observer can not only see the 3D models from a certain position, can also Make 360 ° of panorama observations around the model.Fix position observation when, human eye partly have received the field information of the model, this When, can be by overturning lenticule recording materials 1 up and down, it is seen that dynamic 3D effect；When being observed as panorama, that is, keep Object space position is motionless, and observer rotates around this object, it is observed that the azimuth information each all around of 3D objects, empty Between the sense of reality greatly enhance.

Embodiment 4：

The z-axis height of lenticule recording materials 1 in optical field imaging printing equipment shown in fixed Fig. 6, and fixed column lens 4 The angle of orientation be θ, control platform only makees the movement in x-y directions, then four-dimensional volumetric pixel light field expression is reduced to two-dimentional L1 (x, y), according to This can be printed with various visual angles or the suspension at consecutive variations visual angle or the two-dimension light field figure of sinking.Described in background technology Existing patent unlike, in the present invention program print various visual angles X-Y scheme need not be by one width of various visual angles figure Printing, but utilize the mode of vibration mirror scanning directly to export a grand pixel, the grand pixel includes the son of many different visual angles Pixel, each sub-pixel correspond to the pixel of various visual angles figure to be entered.

For the ease of being better understood from, light beam 71,72,73 is three in some scan period in reference picture 7,8,12, Fig. 7 Bar light beam (and only making this discrete scanning in three positions in each scan period), its corresponding three printings light beam is respectively accompanying drawing 8 In 711,721,731, have been pointed out above, 711,721,731 represent three different incident visual angles respectively, control during scanning The pulse switch of light source 2, you can three pixels on three width visual angle figure same positions are represented respectively with this three convergent beams, this Three sub-pixels then constitute grand pixel V.Laser pulse Push And Release, it should be controlled according to the Pixel Information of figure to be entered.Referring to Figure 12, is the pixel arrangement of three width two-value visual angle figures shown in figure, and the rectangular slat arrangement of top two is represented by three width visual angle figures The grand pixel of three pixel ordered arrangements composition on same position.Opened with pulse laser and represent pixel value 1, pulse laser closes generation Table pixel value 0, then grand pixel V can be made up of three sub-pixels v1, v2, v3 respectively in Fig. 8, utilize the Push And Release of pulse laser, V Value can be expressed as 1-1-1, when being moved to next position, scanning galvanometer system 3 on post lens 4 multiple scanning this three regard Angle light, according to the Pixel Information of figure, export three sub-pixel groups of this position into grand pixel value V ', be as shown in figure 12 1-0-1, by that analogy, until exporting the Pixel Information of all visual angle figures.It can be seen that 3 pixels of each position input Information is the ordered arrangement of every width visual angle figure same position, such as the order arrangement of every multi-view image prime matrix (1,1) position, Because the scan frequency of scanning galvanometer system 2 is high, this method batch input various visual angles figure has instantaneity, and is not present The alignment issues of multiple input viewing angle figure, thus efficiency high.When especially making continuous visual angle change figure, this efficiency is existing It is difficult to what is reached in scheme.

Figure to be entered in the present embodiment is not limited to the various visual angles figure of same object or the two dimension of different objects Figure.When input be several visual angle figures of same object when, because observers can be respectively received regarding with parallax Angle figure, two width parallax perspective views are synthesized by brain, object relative material surface flotation or the three-dimensional effect of sinking can be felt Fruit, lenticule recording materials 1 are rocked to change observation visual angle, it is seen that obvious dynamic 3D effect.If input is different Object representation, the visible dynamic change figure effect of lenticule recording materials 1 is rocked, such as observes a rabbit run, it is preceding Text has been described, and repeats no more.When completing above-mentioned various visual angles figure light field L1 (x, y) input, change the angle of orientation of post lens 4, The input of next group of various visual angles figure light field L2 (x, y) can be carried out, realizes the multiple utilization of material the same space.

Embodiment 5：

In above-mentioned embodiment 4, after printing light field data L1 (x, y), the height of x-y-z platforms is adjusted, follows the prescribed rules and beats Another light field data L2 (x, y) is printed, then reproduce a floating image and a sinking images, will when observing this floating sinking images Strong 3D depth of field senses are obtained, and continuously change visual angle in the sector that the angle of orientation is, it is seen that obvious dynamic effect.Referring to Floating ribbon 9 shown in Figure 13, two-dimension light field L1 print datas correspondingly float sinusoidal ribbon 91, light field data L2 print datas pair Should be sunk ribbon 92, float sinusoidal ribbon 91 and sink the sinusoidal amplitude of ribbon 92 and the cycle it is all identical, the two phase phase difference of pi/4, View is that the relative position of the sinusoidal ribbon 91 of floating and the sinusoidal ribbon 92 that sinks that observer observes in visual angle a is closed above System, medial view are the another relative of the observer sinusoidal ribbon 91 of floating observed in visual angle b and the sinusoidal ribbon 92 that sinks Position relationship, underlying view are that observer the floating sine ribbon 91 observed in visual angle c and the sinusoidal ribbon 92 that sinks are in Existing geometric space position.It can be seen that during the difference of visual angle, two sinusoidal ribbons are misplaced, and observer visual angle continuously becomes from a To c, you can relative position has obvious dynamic change between seeing two ribbons.

Embodiment 6：

Figure 14 is referred to, Figure 14 with the symmetrical spherical lens 8 of circle or or focuses on the post lens 4 used in the foregoing present invention Ability is more preferably and the non-spherical lens that matches of numerical aperture and post lens, or the compound lens with aberration correction substitute, should The numerical aperture NA of spherical lens 8 is not less than the numerical aperture NA of post lens 4.When water of the scanning galvanometer system 3 along spherical lens 8 During flat symmetry axis dimension linear scanning, the output end of convergent lens group 6 can also obtain sector domain volumetric pixel light field, control light Horizontal symmetry axis scanning of the track along different orientation, i.e., without column spinner lens 4, can also be obtained using non-rotating spherical lens 8 The sector of different orientation is obtained, realizes the printing model in the present invention.Figure 15 is referred to, Figure 15 is scanning galvanometer system 3 in ball The elevational projection of the surface scan track of face lens 8, line segment 81,82 are two horizontal symmetry axis of spherical lens 8, while line segment 81st, 82 be also that the angle of orientation is θ 3, θ 4 scanning ray respectively.In the present embodiment, the angle of orientation of scanning ray is four variable light θ variables in field L (x, y, z, θ).Except that the focused light spot of cylindrical lens 4 is sleeve configuration, due to only one-dimensional focusing, The uneven influence of Gaussian spot is small, is advantageous to the light intensity uniformity of the sub-pixel tiling printing on scanning direction, it is possible to provide excellent The image quality of microlens array and the effect of spatial reuse.And the advantage of spherical lens 8 is used to be, it is not necessary to machinery Rotation can obtain orientation angle variable θ, but utilize the focusing of symmetric spherical lens 8, and cause can be sharp for Gaussian spot uneven Reduced with energy efficiency, simultaneously as still there is focusing effect in another one-dimensional square, thus for sub described in embodiment 4 Its observable viewing angle distribution has space circular symmetry for pixel, and when being observed with different orientation angle, reproduction image is easily with before Crosstalk occurs for the picture of one angle of orientation, so as to reduce dynamic 3D observation experience.So present invention preferably employs the rotation of post lens Scheme.

In summary, the optical field imaging printing equipment in the present invention is mainly swept using scanning galvanometer system on lens face The change with reference to 3 d space coordinate is retouched to realize that four-dimensional light field data prints.Laser pulse switch, the rotation of post lens, galvanometer system System scanning, the movement of x-y-z platforms are both needed to be controlled according to graphical information harmonious orderly to be entered.It is hereby it is achieved that more real three-dimensional Dynamic feels the film of image, by controlling different variate-values, realizes the floating image of a variety of different qualities.Ensure to realize Such as various visual angles become the imaging effect of figure, and and can obtains the three dimensional viewing experience of more real-world object.In addition, can also be from different The angle of orientation prints different images, prepares the stereo-picture film with spatial reuse.

It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It is appreciated that other embodiment.

Claims (12)

1. A kind of 1. optical field imaging printing equipment, it is characterised in that：Including light source, scanning galvanometer system, lens, diffusion sheet, convergence Lens group and lenticule recording materials, the scanning galvanometer system include galvanometer and f-theta lens, and the lens are placed in flat The focal plane of field condenser lens, the diffusion sheet are placed on the focal plane of lens, and diffusion sheet is protected with assembling the upper end of lens group One section of adjustable distance is held, the light source launches laser, and it is saturating with assembling that light is scanned through galvanometer system, lens, diffusion sheet successively Microscope group, the focal beam spot of transient behavior is exported, obtain volumetric pixel radiation light field, then recorded instantaneously by the lenticule recording materials Volumetric pixel radiates field information, and the volumetric pixel radiation light field is controlled by four Independent Parameters, including three dimensional space coordinate variable And lens orientation angle variable, between variable can free valued combinations, by four-dimensional variable drop into three-dimensional or two dimension.
2. A kind of 2. optical field imaging printing equipment as claimed in claim 1, it is characterised in that：The lenticule recording materials include Microlens array and the light-sensitive layer below microlens array, the microlens array are by clear aperature and relief depth For the array of micron-sized lens composition, the light-sensitive layer is that irreversible light becomes material.
3. A kind of 3. optical field imaging printing equipment as claimed in claim 1, it is characterised in that：The light source launches laser, through sweeping Galvanometer system emergent ray is retouched, makees linear scan in lens surface, forms scanning ray cluster, after lens, scanning ray cluster meeting Gather on the diffusion sheet surface, and scattered, the convergent lens group is collected convergence to light beam.
4. A kind of 4. optical field imaging printing equipment as claimed in claim 1, it is characterised in that：When printing three-dimensional body, mobile institute The x-y-z platforms where lenticule recording materials are stated to obtain the volumetric pixel of different spatial.
5. A kind of 5. optical field imaging printing equipment as claimed in claim 1, it is characterised in that：The fixed lenticule recording materials Z-axis height and lens the angle of orientation, the platform where lenticule recording materials only makees the movement in x-y directions, then four-dimensional body image Plain light field expression is reduced to two dimension, and thus printing is with various visual angles or the suspension at consecutive variations visual angle or the two-dimension light field figure of sinking Shape, using galvanometer scanning system, a grand pixel directly being exported, the grand pixel includes the sub-pixel of many different visual angles, Each sub-pixel correspond to the pixel of various visual angles figure to be entered.
6. A kind of 6. optical field imaging printing equipment as claimed in claim 1, it is characterised in that：The lens are from post lens, circle Symmetrical spherical lens, focusing power more preferably and numerical aperture match with post lens non-spherical lens, there is aberration correction Compound lens in one kind.
7. A kind of 7. optical field imaging printing equipment as claimed in claim 6, it is characterised in that：The lens select post lens, post The numerical aperture of lens focuses between 0.3~0.95, to incident ray in one-dimensional square, another direct transmitted ray of dimension, by The light beam that convergent point continues to propagate spreads into sector domain.
8. A kind of 8. optical field imaging printing equipment as claimed in claim 7, it is characterised in that：The post lens are around its own geometry The Z axis rotation at center, the anglec of rotation of post lens are determined the angle of orientation of sector domain radiation light field, determined when using a certain angle of orientation During value printing 3 d light fields data, observer can only observe image in the sector of this angle of orientation, when this angle of orientation of deviation When, then picture drop-out or observe deviate after oriented surface in image.
9. A kind of 9. optical field imaging printing equipment as claimed in claim 6, it is characterised in that：The lens select spherical lens, Horizontal symmetry axis dimension linear scanning of the scanning galvanometer system along spherical lens, convergent lens group output end obtains fan-shaped Face domain volumetric pixel radiation light field.
10. A kind of 10. film with three-dimensional floating image, as the optical field imaging printing equipment any one of claim 1-9 Prepare, it is characterised in that：The field information of one or more objects is have recorded, be reproduce and suspended or sink relative to film surface Floating image, the floating image synthesizes by the subgraph of multiple different visual angles, can be observed from different spatial views.
11. A kind of 11. film with three-dimensional floating image as claimed in claim 10, it is characterised in that：In an oriented surface It was observed that image, be same object various visual angles figure or several different images, when deviateing the oriented surface, then image disappears Lose or observe the image in the oriented surface after deviateing.
12. A kind of 12. film with three-dimensional floating image as claimed in claim 10, it is characterised in that：The floating image is Two dimensional image or 3-D view, when being 3-D view, floating image is the three-dimensional for being apparent in film top, thin film planar or lower section Depth image, or from a depth to the 3-D view of another depth consecutive variations.