CN105259664A - Light field imaging and printing device and thin film with three-dimensional floating images - Google Patents

Abstract

The invention provides a light field imaging and printing device and a micro lens thin film with three-dimensional floating images, wherein the thin film is prepared by the light field imaging and printing device. The scanning operation on a lens surface is conducted by a scanning galvanometer system, and four-dimensional light field data can be printed in combination with the variation of space three-dimensional coordinates. The light field imaging and printing device comprises a light source, a scanning galvanometer system, a lens, a diffuser, a converging lens assembly and a micro lens recording material. Light rays sequentially pass through the scanning galvanometer system, the lens, the diffuser and the converging lens assembly, and then instantaneous and dynamic focus spots are outputted. In this way, a volumetric-pixel type radiation light field is obtained. After that, the information of the instantaneous volumetric-pixel type radiation light field is recorded by the micro lens recording material. By means of the device and the thin film, more realistic three-dimensional dynamic images can be formed. Through controlling different variable values, floating images of multiple different characteristics are formed. Therefore, the multi-view imaging effect of varying images can be realized.

Description

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

Technical field

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

Background technology

Why real three-dimensional body can be observed by people, is that object can be considered as the set of the pointolite with many luminescences, each pointolite is referred to as an individual pixel of object because object sends luminous energy to space.People, when observing three-dimensional body, are actually the directional information at the spatial positional information and every individual pixel point emitted light obtaining each volumetric pixel of this object.Based on above principle, optical field imaging theory is thought, two dimensional surface expresses a three-dimensional body information, at least need four independent variables, i.e. three-dimensional coordinate variable x-y-z and direction variable θ, namely light field is defined as all this four parameteric lights beta radiation degree function L (x, y in space, z, θ) set.

Optical field imaging technology can trace back to the integral photographic art (IntegralPhotography, IP) of French scientist Lippmann proposition in 1908, and the method utilizes the recording materials being covered with lenticule or pinhole array to obtain the field information of three-dimensional body.The real image that the light that real-world object sends becomes to reduce by microlens array also makes the photosensitive layer exposure of photographic negative, because residing locus is different, each lenticule is from different visual angles to image objects, and thus the final imaging of photographic negative is by the synthesized image of each lenticule imaging.After photographic negative development, by the synthesized image on this microlens array viewing egative film, according to path reversal principal, observer can see the 3-d reproduction of captured scene, and the visual effect of this 3-d reproduction picture is as being suspended on egative film.Because microlens material is noted down to object from different directions, namely have recorded the subject image with parallax.During reproduction, if observer changes orientation, will there is continuous print slight change to the observation visual angle of two in lenticule, visually can form the floating imaging effect of Spatial distributions three-dimensional.

Based on the laser printing technology of optical field imaging principle, utilize convergent laser focus point to simulate three-dimensional body volumetric pixel radiation light field, and obtain this field information by microlens array film material.Utilize light, mechanical, electrical device to regulate and control the converging ray of different incidence angles degree, different focal height, input characters, two dimension or three-dimensional image, reproduce and there is Different Dynamic depth of field image.Such technology mainly comprises the acquisition with simulation points light field that designs and produces of lenticule thin film recording material.

For lenticule recording materials, US Patent No. 2326634 discloses one and is partially submerged in polymeric material adhesive layer by transparent beads, then plates the aluminium film of 80nm left and right thickness at this polymeric material back side.This shaped material is focused on incident field by transparent beads, and focal spot energy reaches the damage threshold of aluminium film and ablation aluminium film, destroys the reflectivity of this place's material, thus with the reflectivity difference to some extent of background aluminium lamination, cause contrast different, namely generate pixel.In order to obtain coloured image, multilayered film material also can be used to replace single aluminium coated, when multilayer film absorb the embossment structure of different luminous energy and ablated one-tenth uneven thickness, based thin film principle of interference and present colored image.Described in US Patent No. 3801183, use cryolite/zinc sulphide (Na3AlF6/ZnS) double membrane structure, or chromium/polymkeric substance/silicon dioxide/aluminium multilayered films, more multiple film layer structure refers to patent CN200880106663.4.The microballoon that above-mentioned material half is exposed is easily destroyed; cause the decline of reproduced image quality; Chinese patent CN201180053337.3 provides the lenticular structure of a kind of protection; it by complete for transparent beads submergence within the adhesive layer; then the transparent material layer of about 200um is applied over the binder layer; this transparent material layer not only can prevent microballoon from leaving position; also can obtain the durabilities such as splendid friction resistant, shock resistance, and this transparent material layer can be the glossiness outward appearance that integral material provides fabulous.

For the acquisition of simulation points light field, Chinese patent literature CN200880106663.4 describes the acquisition scheme of multiple light field.Scheme one, by the reduced of parallel laser light source extremely about 1mm by optical system, be radiated on the ceramic bead of about 5mm, utilize the scattering process of shaggy ceramic bead to obtain the light field of diffusion, coordinate the movement of the x-y-z volume coordinate of recording materials to record the light field data of three-dimensional body.Scheme two utilizes the converging parallel laser beam of lens to produce a light field.The method expands hot spot by diffusion sheet, is obtained expand light beam by colimated light system, and with convergence or the concavees lens diffusion function of convex lens, produce the some light field with focusing effect, namely this light field represents an individual pixel of object to be printed.By the x-y platform at moving recording material place to change the relative tertiary location of volumetric pixel, directly can write a width X-Y scheme information, fit through the height changing plus lens again, then can obtain the volumetric pixel locus of different depth information, thus, realize floating graphic by the mode of successively scanning and printing.Scheme three, proposes to utilize laser beam irradiation microlens array surface, is reflected, then collect this light beam dispersed by convex lens by the lenticule of large-numerical aperture to light beam, obtain the some light field assembled.Simultaneously by the mobile luminous point of scanning of galvanometer, thus on recording materials direct print image information.

Chinese patent literature CN201310291009.8 utilizes galvanometer to scan on convergent lens, the refraction of convergent lens is utilized to obtain the light of different incidence angles, near lens focal plane, place large-numerical aperture microlens array, utilize lenticule deviation light beam, obtain the some light field spread.This pointolite is suspended in recording materials surface all the time, in order to obtain the convergent point light field of sinking, point out in patent to place convex lens between microlens array and recording materials, collect the luminous energy be diffused, and make it focus on the below of recording materials, thus can obtain sink be printed as picture.Because the frequency of vibration mirror scanning is very high, within the extremely short time, each scanning ray can be focused on same point by lens, instantaneously at the focal plane place of lens produce a dynamic focused light spot, the single beam of the patent CN200880106663.4 of ratio pools picture, can increase the field angle of reproduced image, image dynamically feels stronger.

Chinese patent literature CN200880117941.6 discloses a kind of technology that lenticule recording materials master mold can be utilized to copy in enormous quantities.The method still adopts the optical system of the converging parallel light of lens to obtain convergence light field, and the stores record of master mold described in literary composition layer is no longer above-mentioned aluminium or multilayer film, but coating has the material layer of photopolymerization, can single photon be there is in this material layer for femtosecond laser light source, two-photon is Multiphoton Absorbtion even, to cause this polymeric material generation Local physical, the change of chemical characteristic, such as the material of this local attribute change cannot by organic solvent dissolutions such as ethanol, the material component of non-absorb photons then can dissolve, so embossment structure will be presented by the material after dissolving, thus have recorded the information of image.A series of solidification is carried out to make the master mold with the distortion of certain resistance to mechanical to this embossment structure, utilizes the mature micro-reproduction technology of industry, as volume to volume impression, can mass production be realized.

The method with three-dimensional floating image film is made different in above-mentioned patent, especially the acquisition device of simulation points light field is different, the floating image observable visual angle causing film to reproduce and dynamic range of observation different, though respectively have advantage, shortcoming is also clearly.As described in scheme in patent CN200880106663.4 one, the volumetric pixel size obtained is at least the diameter of laser beam, causes image quality resolution when reproducing low.And described in scheme two, because laser beam intensity distribution belongs to Gaussian distribution, this method single beam laser being expanded to focusing, the luminous energy density that recording materials face is collected is uneven, be difficult to control the modification energy threshold that various point locations can reach recording materials, thus, effectively can not utilize luminous energy, cause the numerical aperture of the pyramid type point light field obtained little, observation visual angle when impact is reproduced.Although image has suspension or the sense of the sinking depth of field, because field angle is less, thus dynamically sense is more weak, and this system does not have variable " position angle " variable, and input the ability of different graphic under not possessing different field angle, printing model is single.Scheme three requires that scanning light spot is aimed at lenticule accurately, otherwise, when laser beam moves to two lenticular borders, its reflective functions weakens, likely light beam is divided into two, affect imaging arrangement, when beam spot scans is to edge, by the capture range having some light to depart from lens, reduce capacity usage ratio, reduce system value aperture and field angle, because the program only relies on vibration mirror scanning to project the location of pixels of input picture, because final light is no longer propagate along the exit direction of galvanometer, and be through the deviation of optical system, imaging point departs from predeterminated position, final imaging is caused to be no longer desirable picture, such as distort.Simultaneously, its printing various visual angles graphic procedure described, the convergence light field of an incident angle is first provided by system, keep this incident angle, realized the input of a visual angle figure by mobile x-y platform, then provide the convergence light field of another incident angle by system, repeat mobile x-y platform and input another visual angle figure, not only inefficiency, and the problem having that each visual angle light accurately aims at same position.The method that patent CN201310291009.8 adopts, final still acquisition by microlens array refraction assembles light field, there will be the drawback of above-mentioned patent equally, simultaneously, because lens only upwards focus at one-dimensional square, cause the loss of other azimuth information, institute presents image only upwards has innervation at one-dimensional square, light path first need be calibrated to obtain required visual angle when inputting multi-view image in scheme, input visual angle figure again, then recalibrate another visual angle light path, then input another width picture, repeat this program, until export whole visual angle figure.Clearly, such scheme not only efficiency is low, and inputs several visual angles figure at same position, needs each operation accurately can both aim at this position, adds complicacy.

Binocular vision system is had to the function of simultaneously observing same object from both direction, object does two-dimensional projection respectively on the retina, is synthesized two width parallax perspective views by brain, produces stereoeffect.The light field of each surface point institute radiation of true three-dimension object has the feature of taper diffusion, and the angle α scope of this cone of radiation can from 0-360 °, and angle is larger, illustrates that the field angle that can be observed this object point is larger.Laser printing optical field imaging system adopts convergent laser to synthesize the light field of three-dimensional body, its focus point correspond to an individual pixel of object, the analogue body pixel light field characteristic obtained in scheme is above different, and thus, the effect observed during reproduction is also different.Such as, numerical aperture is different, causes the field angle of dynamic observation image to vary.Numerical aperture is larger, and field angle is larger, and dynamically sense is stronger, so how synthesizing the volumetric pixel light field of large-numerical aperture, is the problem that this patent needs to solve.

Certainly, another center of gravity that synthesized field information is this specialty how is recorded.Utilize two dimensional surface record three-dimensional body, during reproduction, wishing can just as on the spot in person, and continuous print observes this object from different perspectives, this cone of radiation light field just requiring material farthest can record object each point to send.Further, because the quantity of information of three-dimensional body is larger than two dimension, people wish, same material area can record abundanter information, namely require that material has spatial reuse function, and such observer can observe different image from different orientation.Laser light field imaging print system based on microlens array recording materials meets simulation and the technical conditions of record simultaneously, can print the picture of rear direct reproduction three-dimensional body.

As previously mentioned, optical field imaging technology need four independently variable could express a space three-dimensional object, the span according to adopted variable can show different imaging effects.Existing optical field imaging technology described in documents and materials, only has three independent variables, and another dimension is constant.Be volume coordinate x-y-z variable system as described in CN200880106663.4 patent, deflection variable θ is constant, so this system can obtain 3D depth image, and can not the multiplexing function in implementation space, and owing to analyzing above, 3D dynamically feels weak.And patent CN201310291009.8 is (x, y, z, θ) variable system, z is constant, thus, can input different X-Y schemes, and can not print three-dimensional body under different visual angles.

Therefore, industry is needed a kind of more true three-dimension that can realize badly and is dynamically felt the film of image and have the optical field imaging printing equipment of four-dimensional variable, by controlling different variate-values, can realize the floating image of multiple different qualities.Guarantee the imaging effect that can realize such as various visual angles change figure, the three dimensional viewing that can obtain again real-world object is more experienced.Such as realize 360 ° of panorama floating images and stronger dynamic effect.Also can print different images from the different angles of orientation, preparation has the stereo-picture film of spatial reuse.

Summary of the invention

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

Four-dimensional variable optical field imaging printing equipment comprises light source, scanning galvanometer system, collecting optics assembly, lenticule recording materials and x-y-z tri-axle mobile platform, wherein collecting optics assembly comprises controllable rotating post lens, recording materials are placed on mobile platform, light source is scanned on controllable rotating post lens arc surface by scanning galvanometer, final formation has the convergence light field of large-numerical aperture, this convergence light field is by the recording layer of each micro lens to membraneous material, the energy focused on makes this recording layer modification to provide a pixel, mobile x-y-z platform changes the locus of lenticule recording materials, then this convergence light field the recording layer after each lenticule can form multiple pixel, these pixels constitute each lenticule subimage below, during reproduction, the subimage associated with it is refracted to aerial image by each lenticule, common synthesis floating image.Subimage correspond to different angulars field of view, so can observe composograph from the different visual angles of film, along with the movement of observer, institute has dynamic effect depending on composograph.

Lenticule film is prepared from by above-mentioned four-dimensional variable optical field imaging printing equipment, it have recorded the field information of one or more object, and the image suspending relative to material surface or sink can be reproduced, these images by lenticule to membraneous material become intensified image to form composograph, these suspend or sink composograph referred to as floating image.Floating image can be two dimensional image or 3-D view, it can be black and white, also can be colored, floating image looks like the three-dimensional depth image be apparent in above membraneous material, on or below plane, also can look like from a degree of depth to another degree of depth continually varying 3-D view.Floating image has visual angle change characteristic, and observer can with the naked eye watch, and can move along with observer and change.Lenticule membraneous material reproduced image in the present invention, not only observable visual angle is large, image dynamically feels strong, and its visual angle also has the characteristic of territory, face orientation, namely a certain reproduced image can be observed by dynamic concept in certain oriented surface, then another different image can be reproduced at same position in another oriented surface, different oriented surfaces is characterized by angle of orientation θ, and its value 0-360 ° continuous optional.

The present invention, by controlling different variate-values, can realize the floating image of multiple different qualities.Guarantee the imaging effect that can realize such as various visual angles change figure, the three dimensional viewing that can obtain again real-world object is more experienced.Such as realize 360 ° of panorama floating images and stronger dynamic effect.Also can print different images from the different angles of orientation, preparation has the stereo-picture film of spatial reuse.

A kind of optical field imaging printing equipment that object according to the present invention proposes, comprise light source, scanning galvanometer system, lens, diffusion sheet, convergent lens group and lenticule recording materials, described scanning galvanometer system comprises galvanometer and f-theta lens, described lens are placed in the focal plane place of f-theta lens, described diffusion sheet is placed on the focal plane of lens, diffusion sheet keeps one section of adjustable distance with the upper end assembling lens combination, described light source Emission Lasers, light is successively through scanning galvanometer system, lens, diffusion sheet and convergence lens combination, export the focal beam spot of transient behavior, obtain volumetric pixel radiation light field, again by described lenticule recording materials record instantaneous body pixel radiation field information.

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

Preferably, described light source Emission Lasers, through scanning galvanometer system exit light, do linear sweep at lens surface, form scanning ray bunch, after lens, scanning ray bunch is focused at described diffusion sheet surface, and is scattered out, and described convergent lens group is carried out collection to light beam and assembled.

Preferably, when printing three-dimensional body, the x-y-z platform at mobile described lenticule recording materials place obtains the volumetric pixel of different spatial.

Preferably, described volumetric pixel radiation light field is controlled by four Independent Parameters, comprises three dimensional space coordinate variable and lens orientation angle variable, can free valued combinations between variable, is fallen into by four-dimensional variable three-dimensional or two-dimentional.

Preferably, the z-axis height of fixing described lenticule recording materials, and the angle of orientation of fixed lens, the movement in x-y direction only done by the platform at lenticule recording materials place, then four-dimensional volumetric pixel light field is expressed and is reduced to two dimension, print thus and there is various visual angles or the suspension at consecutive variations visual angle or the two-dimension light field figure of sinking, utilize galvanometer scanning system, direct output grand pixel, described grand pixel includes the sub-pixel of many different visual angles, and each sub-pixel correspond to the pixel of various visual angles figure to be entered.

Preferably, described lens select the symmetrical spherical lens of post lens, circle, focusing power better and numerical aperture and post the lens non-spherical lens, the one had in the compound lens of aberration correction that match.

Preferably, post lens selected by described lens, and the numerical aperture of post lens is between 0.3 ~ 0.95, and to incident ray at one dimension direction focusing, another ties up direct transmitted ray, and the light beam being continued to propagate by convergent point becomes sector territory to spread.

Preferably, described post lens rotate around the Z axis of himself geometric center, the anglec of rotation of post lens determines the angle of orientation of sector territory radiation light field, when adopting a certain angle of orientation definite value to print 3 d light fields data, observer can only observe image in the sector of this angle of orientation, when departing from this angle of orientation, then picture drop-out or the image observed in the oriented surface after departing from.

Preferably, spherical lens selected by described lens, and described scanning galvanometer system scans along the horizontal symmetry axis dimension linear of spherical lens, and convergent lens group output terminal obtains sector territory volumetric pixel radiation light field.

The present invention also proposes a kind of film with three-dimensional floating image, optical field imaging printing equipment preparation according to any one of claim 1-9, it is characterized in that: the field information that have recorded one or more object, the floating image suspending relative to film surface or sink can be reproduced, described floating image is synthesized by the subgraph of multiple different visual angles, can observe from different spatial view.

Preferably, the image observed in an oriented surface is various visual angles figure or several different images of same object, when departing from described oriented surface, then and picture drop-out or the image observed in the oriented surface after departing from.

Preferably, described floating image is two dimensional image or 3-D view, during for 3-D view, floating image be apparent in above film, the three-dimensional depth image of thin film planar or below, or from a degree of depth to another degree of depth continually varying 3-D view.

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

(1) printout realizing 3D object data by four-dimensional light field parameter is proposed, all light ray energy of this object institute radiation of the description using four-dimensional variable parameter quantitative, namely light field can quantitative expression, to light field understanding from different perspectives, can characterize by different four-dimensional parameters, such as a light is crossing with two parallel planes, and namely two position of intersecting point are four variablees, also can characterize light field data information with three spatial coordinates variable and one dimension anglec of rotation variable.And existing integration imaging is theoretical and be indifferent to field information that microlens array material catches by which state modulator.But in the present invention, use the print system of convergent laser simulation object volumetric pixel light field, radiation light field accurately can be controlled by parameter, more has practical value.

(2) the present invention can provide more abundant printing model, for four-dimensional variable optical field imaging printing equipment, can fix wherein some parameters is definite value, or to get some parameters be limited discrete value, then can print successively and have the high dynamic two dimension of Large visual angle or three-dimensional picture.And from the graphic rendition result envisioned, the print parameters of initialization system is removed in reverse consideration, clear thinking, not easily confusion.More estimable, because post lens only upwards focus at one-dimensional square, when the angle of orientation setting post lens is some discrete definite value, 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) the present invention can realize light field data printing efficiently, the sub-pixel light field at the incident visual angle of many differences obtained by vibration mirror scanning in one-period because of the grand pixel light field essence at certain locus place forms, these sub-pixel light fields represent the Pixel Information of the multiple image same position of different visual angles, and due to the high frequency sweep of galvanometer, input and the record of this sub-pixel set just can be realized within the extremely short time, carry out grand pixel light field input and the record of the next position successively, the printing of various visual angles figure can be completed, because galvanometer can do high frequency continuous sweep, thus the present invention also can input efficiently and have visual angle continually varying figure, same effect can not be realized in prior art.

(4) the imaging viewing field angle in the present invention is large, dynamically sense is strong.Because laser beam intensity Gaussian distributed, in the middle of energy, close edge is dredged, Gaussian beam is after the optical system of apparatus of the present invention, the Light Energy distribution arriving lenticule recording materials surface is still even not, due to the restriction of material energy threshold value, not every luminous energy all can make material modification, will reduce the effective numerical aperture of this convergence light field thus, thus field angle is reduced, reduce dynamic sense when observing rendering graphical.And in the present invention, adopt vibration mirror scanning, the incident optical energy of scioptics group different field angle is below evenly distributed, although the imaging point of single beam field angle belongs to small field of view imaging, but the grand pixel obtained by the scanning outgoing light combinations of this small angles many has the high dynamic feature of Large visual angle, the physical dimension of this grand pixel depends on that galvanometer is in the scanning distance of post lens surface, post lens numerical aperture and light channel structure design, numerical aperture is larger, the closer to the post focal length of lens, grand Pixel Dimensions is less, and rendering graphical is more clear.

(5) lenticule film reproduction floating image can be synthesized by the subgraph of multiple different visual angles, synthesis floating image can be observed from different spatial view, in certain oriented surface, viewed image can be the various visual angles figure of same object, also can be several different images, when departing from this oriented surface, then picture drop-out, or observe the image in the oriented surface after departing from.

(6) the post lens of large-numerical aperture, can rotate around himself optical axis, and the rotation angle of post lens determines angle of orientation when observing, and namely the anglec of rotation of post lens provides an independent variable θ of four-dimensional light field.

(7) laser beam scans the sector territory volumetric pixel incident field obtaining transient behavior on post lens arc surface, and the arc surface of post lens also can be designed as the symmetrical secondary curved surface that other has one-dimensional focusing.The spherical lens that post lens 4 can use circle symmetrical, or the non-spherical lens that focusing power better and numerical aperture and post lens match, or the compound lens with aberration correction substitutes, when scanning galvanometer system along spherical lens horizontal symmetry axis dimension linear scanning time, convergent lens group output terminal also can obtain sector territory volumetric pixel light field, control ray trajectory scans along the horizontal symmetry axis of different orientation, therefore rotates the printing model that also can realize in the present invention without the need to machinery.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is lenticule recording materials side views

Fig. 2 is lenticule recording materials sectional views

Fig. 3 records object light field information schematic diagram on lenticule recording materials

To be lenticule film to be floated 3-D view schematic diagram by reflect ambient light reconstructed object Fig. 4

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

Fig. 6 is optical field imaging printing equipment schematic diagram

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

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

Fig. 9 is that lenticule film various visual angles observe schematic diagram

Figure 10 is the lenticule film characteristics schematic diagram with three-dimensional floating image, namely observes the schematic diagram of different objects under lenticule film different orientation angle

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

Figure 12 is that sub-pixel forms grand pixel schematic diagram

Figure 13 is the schematic diagram replacing post lens in optical field imaging printing equipment by 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 prior art, the three-dimensional floating image film produced, image quality resolution when having reproduction is low, the efficiency of light energy utilization is low, printing model is single, the shortcomings such as complicacy is high, therefore, the present invention proposes the optical field imaging printing equipment with four-dimensional variable, more true three-dimension can be prepared and dynamically feel the film of image, by controlling different variate-values, realize the floating image of multiple different qualities, guarantee the imaging effect that can realize such as various visual angles change figure, the three dimensional viewing that can obtain again real-world object is more experienced, also can print different images from the different angles of orientation, preparation has the stereo-picture film of spatial reuse.

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

Please also refer to Fig. 1 ~ Fig. 2, side view and the cut-open view of lenticule recording materials 1 respectively, lenticule recording materials 1 comprise the microlens array 11 above overlaying on and the light-sensitive layer 12 below microlens array 11, microlens array 11 is the array that micron-sized lens form by clear aperature and relief depth, it not only has the basic function such as focusing, imaging of conventional lenses, and having the advantages that unit size is little, integrated level is high, the cycle of usual each lens is between 20 μm-200 μm.Lenticule itself can have multi-form, as circular plano-convex lenslet, circular biconvex lenslet, microsphere or globule shape lenslet.Make the combination that lenticular material comprises glass, polymkeric substance, ore, crystal, semiconductor and these materials and other materials.

Light-sensitive layer 12 is that a kind of irreversible light becomes material, and after the illumination exceeding its surperficial threshold energy, this material can comprise color or qualitative change.The multilayer film that these materials comprise metal, metal oxide, polymkeric substance, semiconductor material and are made up of these materials.Material of such as aluminizing heat absorption evaporation or some macromolecule polymer materials irradiate lower surface blackout at laser, thus cause material modification, produce contrast and change, namely create pixel with former substrate material.When beam of laser is after microlens array 11 forms some images on light-sensitive layer 12, by the trickle change of microlens array 11 pairs of pixel light, regenerated pattern is looked the dynamic effect floating or sink.

Light source 2 provides laser to irradiate, and light source 2 is fiber laser or semiconductor pumped solid-state laser or excimer laser, mixes the laser instrument that rubidium yttrium aluminum garnet (being called for short Nd:YAG) laser instrument etc. has high-peak power.Pattern is formed by the radiation source ablation recording layer of these high-peak powers.And when light-sensitive layer 12 be non-ablative as photochromic method imaging time, the LASER Light Source of the low peak power such as such as laser diode, ion laser, gas laser can be adopted.Utilize the optical field imaging printing equipment in the present invention, parallel laser beam is modulated to the focused beam spreading to different directions or assemble to same direction, with the volumetric pixel radiation characteristic of Reality simulation object.

Refer to Fig. 3, Fig. 3 is the schematic diagram recording object light field information on lenticule recording materials.In the record stage, as shown in Figure 3, by an individual pixel O of the laser facula simulating stereo model dispersed, the spatial light field information of this pixel institute radiation is by microlens array material capture and record, because three-dimensional body can be considered the set of above-mentioned different spatial volumetric pixel, simulate the spatial light field of each individual pixel successively when us and record it, finally can realize the object of two-dimensional material record 3D object information.As can be seen from Fig. 3 we, each lenticule cans be compared to camera small one by one, from different locus to this three-dimensional body imaging, owing to limiting by the radiation space scope of simulation light field, single lenticule can only to the local tomography of this object, and we are called subgraph by imaging after each lenticule.Visible, these two-dimentional subgraphs complete the information decomposition to three-dimensional body just.

Refer to Fig. 4, to be lenticule film to be floated 3-D view schematic diagram by reflect ambient light reconstructed object Fig. 4.In figure, light 201a, 201b are the random surround lighting irradiated, and 202 pixels recorded for lenticule recording materials in Fig. 3,203a and 203b is the refract lights of lens to base material.Based on path reversal principal, subgraph image will by microlens array at former locus projection imaging, and the set of subgraph imaging is the reproduction of this three-dimensional body picture.Here it is emphasized that membraneous material of the present invention not only utilizes reflected light can reconstructed object, being irradiated by transmitted light equally can reconstructed object.When observing this image, due to human eye can only part these subgraph array imagings of reception, so the partial information of object can only be seen a fixed viewpoint, when the relative position of observer's transfer pair image forming material, such as material overturning up and down, or the locus of mobile observer, just can see the information of the diverse location of object, the dynamic three-dimensional body effect of visible different objects part under namely achieving different visual angles.

Can see based on above analysis, the convergent laser light field radiation characteristic of simulation plays an important role to final imaging effect.Comprising, locus coordinate (the x of the focal beam spot of convergent laser, y, z) (determine to float or sinking effect), the numerical aperture NA (determining the size of field angle) of convergent laser, especially in the present invention program, because post lens only upwards play deviation converging action to light at one-dimensional square, in fact the volumetric pixel radiation light field obtained is sector territory, instead of the cone adopting circle lens to obtain.So the angle of orientation θ of this sector radiation light field plays on dynamic imaging effect the impact be even more important when changing as independent variable.Below by its effect of labor in an embodiment.

The numerical aperture NA of laser printing optical system decides the size of maximum Observable field angle, and can see the picture of reconstructed object in much angular ranges, NA is larger, and field angle is larger, and dynamically sense is also stronger.Generally optical system numerical aperture is determined, namely numerical aperture is constant, then mean that the field angle scope of each individual pixel of system simulation is all equal, although thus field angle has certain span, but for being for description object with volumetric pixel, it is still considered constant.

The volumetric pixel light field radiation of simulating in printing equipment of the present invention is controlled by four Independent Parameters, refer to Fig. 5, Fig. 5 is the space coordinates fixed setting of Independent Parameters in optical field imaging printing equipment and rotatable post lens schematic diagram, agreement volume coordinate is right-handed coordinate system, the positive dirction of x-y-z as shown in the figure, 0 °, post lens orientation angle is demarcated as x-axis positive dirction, and be rotated counterclockwise as just, span is 0-360 °.

See Fig. 6, Fig. 6 is optical field imaging printing equipment schematic diagram, structural system shown in Fig. 6 comprises lenticule recording materials 1, light source 2, scanning galvanometer system 3, post lens 4, diffusion sheet 5, convergent lens group 6 and scanning ray bunches 7, and scanning galvanometer system 3 comprises galvanometer 31, galvanometer 32 and f-theta (f-theta) lens 33.As shown in Figure 6, post lens 4 are placed near the focal plane of f-theta lens 33, and diffusion sheet 5 is placed on the focal plane of post lens 4, and diffusion sheet 5 and lens combination 6 upper end keep one section of adjustable distance.Because the focal length of f-theta lens 33 is longer, so visual scanning is parallel beam at the light on post lens 4 surface.First by light source 2 Emission Lasers during the work of this optical field imaging printing equipment, by computer software control scanning galvanometer system 3, do the linear sweep of high-frequency reciprocating on post lens 4 surface through the emergent ray 7 of f-theta mirror 33, accurately control post lens 4 by computing machine to rotate, and guarantee that light scanning direction keeps vertical with post lens 4 optical axis simultaneously, so through the one dimension deviation effect of post lens 4, this scanning ray bunches 7 is focused at diffusion sheet 5 surface, due to the random scatter effect of diffusion sheet 5 pairs of light bunches 7, the laser intensity with Gaussian distribution feature is homogenized, simultaneously the spread angle of light bunches 7 is also increased, through the collection converging action of lens combination 6 pairs of light beams, the focal beam spot V of an exportable transient behavior, namely an individual pixel radiation light field is obtained, this instantaneous body pixel light field information is recorded again by lenticule recording materials 1.When printing three-dimensional body, the x-y-z platform controlling mobile lenticule recording materials 1 place by computing machine obtains the volumetric pixel of different spatial, thus finally completes the print record of 3D object light field.Four-dimensional variable in the present invention, comprises three dimensional space coordinate variable and post lens and rotates angle of orientation variable, can free valued combinations between variable, is fallen into by four-dimensional variable three-dimensional or two-dimentional.Wherein, the numerical aperture of post lens 4 is between 0.3 ~ 0.95, and to incident ray at one dimension direction focusing, another ties up direct transmitted ray, and the light beam being continued to propagate by convergent point becomes sector territory to spread.The large I of field angle of dynamic observation image is calculated by the numerical aperture of convergent lens group.Computing formula is φ=2arcsin (NA), NA is the numerical aperture of convergent lens group 6, and namely maximum field of view angle equals 2 times of numerical aperture negate sine value.

Compared to the existing patent of invention described in background technology, optical field imaging printing equipment of the present invention mainly contains two differences.On the one hand, the volumetric pixel that the present invention adopts the mode doing linear sweep on post lens 4 to obtain a transient behavior change assembles light field.Refer to Fig. 7, Fig. 7 is the part single beam enlarged drawing of the light that scans on post lens 4 of galvanometer system 3 bunches 7, the laser beam of launching due to LASER Light Source can be considered the directional light with certain geometric diameter, and if fiber laser emission wavelength is 1064nm laser beam, diameter is about about 8mm.Parallel beam 71 is changed by emergent ray angle after post lens 4, expand and the converging action of lens combination 6 through the even light of diffusion sheet 5, obtain the printing light beam 711 assembled, along with light beam 71 on post lens 3 continuous sweep to light beam 73 position, print light beam and also become printing light beam 731 continuously from printing light beam 711, namely the angle of incident beam continuously changes, and so not only can promote field angle scope, also achieves the continuous adjustment of field angle.Refer to Fig. 8, Fig. 8 is the enlarged drawing printing light beam 711,721,731 in Fig. 7, can find out that printing light beam 711,721,731 inherently can obtain focusing on picture point v1, v2, v3 respectively, each focusing picture point can be considered a sub-pixel, due to the high frequency sweep of scanning galvanometer system 3, when light beam 71 is from post lens 4 surface scan to 73 position, the sub-pixel of many corresponding different visual angles can be obtained, these sub-pixels form a grand pixel of unit within the extremely short time, the volumetric pixel V namely shown in Fig. 8.Have following features by the light field of such a individual pixel institute radiation: field angle is large, photic-energy transfer is even, and imaging definition is high, and the dynamic sense of 3D optical field imaging is strong.

On the other hand, post lens 4 accurately can rotate around the Z axis (i.e. optical axis) by himself geometric center, as shown in Figure 7.Point out above, the anglec of rotation of these post lens determines the angle of orientation of sector territory radiation light field, so express L (x in the light field of four parameters, y, z, θ) in, the θ variable i.e. rotation angle of post lens for this reason, or be referred to as the angle of orientation of post lens, its span be 0-360 ° accurate adjustable.When adopting certain certain value θ to print 3D light field data, observer can only observe the picture of object in the sector of this corresponding orientation, and when departing from this angle of orientation, such as rotate recording materials 1 one angles, this image will disappear.

At this, highlight the angle of orientation described herein and these two different concepts of field angle.Field angle is defined as can select different observation point in certain plane, thus observation visual angle changes to some extent, such as observer only in x-y face shift position to change visual angle, if but there is the obvious visual angle that can change observer equally of upset in x-y face, such as x-y is turn to y-z plane, therefore, the flip angle of definition plane is the angle of orientation of this plane, in relevant description above, exactly because the angle of orientation that column spinner lens can realize viewing plane is different, thus observer not only can change visual angle in same plane, visual angle can also be changed in Different Plane, its essence is that visual angle parameter needs two-dimensional direction Variable Control, but, for this paper laser print apparatus, conplane field angle span is all identical, constant can be regarded as, only the angle of orientation is characterized visual angle parameter as variable.

Four variable light field L (x in the present invention, y, z, θ) print system, because spatial coordinates variable x-y-z and post lens orientation angle variable θ is separate, when only changing other three variablees printing 3D objects when fixing a certain variable, the 3D dynamic visual angle effect of many uniquenesses can be reproduced, will be described in detail by several specific embodiment below.

Embodiment 1:

In the printing equipment of optical field imaging shown in Fig. 6, when printing, fixed leg lens 4 are to a certain angle of orientation, computing machine controls scanning galvanometer system 3, laser is kept to scan on post lens arc surface, the volumetric pixel light field obtained by convergent lens group 6 is the sector at a fixed orientation angle, and by lenticule recording materials 1 record.According to input 3D model data, control the x-y-z platform at lenticule recording materials 1 place, the mode that employing level successively prints, realizes the light field record of 3D object.All volumetric pixel light fields due to this 3D object are all the sector territory of the same angle of orientation, during reproduction, also can only observe this object in the set face with this angle of orientation, the visible dynamic effect when observer continuously changes observation visual angle in this oriented surface.As shown in Figure 9, observer in paper from visual angle 3 continuous transformation to visual angle 4 visible dynamic cube figure, and when visual angle disengaging paper, object will disappear.So the 3D with this viewing angle characteristic reproduces only for people's viewing, simultaneously for many people's viewings, can not can well protect the privacy of observer.

Embodiment 2:

In embodiment 1, volumetric pixel light field can be expressed as L1 (x, y, z), after completing the printing of this 3D optical field imaging, column spinner lens 4, repeat above-mentioned printing flow process and can input another 3D object light field data L2 (x, y again, z), when post lens 4 rotate the light field data Ln (x, y, z) to inputting different 3D objects during different orientation angle successively.During reproduction, principle as described in embodiment 1, observer can only observe different 3D printing objects successively in the selected fan-shaped set face of the angle of orientation, as shown in Figure 10, when when angle of orientation position, cube model can be observed, when rotation recording materials are to visible sphere model again during the angle of orientation.The 3D with this viewing angle characteristic reproduces and can observe different object informations from different directions for many people, achieves the multi multiplexing of recording materials the same space, material information storage density is increased.If get an angle of orientation at interval of an angle such as 15 °, a 3D model is printed in each angle of orientation, these 3D models belong to a frame of dynamic change 3D video display, a such as toy of running, or a person model rotated, then the angle of orientation of 0-360 ° can input 12 frame 3D renderings, when observer's fast rotational lenticule recording materials 1 are observed to change the angle of orientation, because the visual angle of human eye persists effect, visible dynamic 3D animation effect.It is pointed out that, because human eye pupil is for circular, only when observer during right-angle view, can receive the graphical information at different orientation angle directly over material simultaneously, for avoiding the generation of this visual angle crosstalk, the angle of inclination that observer should keep certain is observed.Here, emphasize that every two field picture is all three-dimensional, instead of two dimension, show that observer can observe the not ipsilateral of same frame 3D object with different pitch angle (i.e. field angle), add the sense of reality of observing dynamic object.

Embodiment 3:

As the special case of embodiment 2, column spinner lens 4 make angle of orientation consecutive variations, and are no longer discrete value.Here the gyro frequency of post lens 4 should far below the sweep frequency of scanning galvanometer system 3, with guarantee post lens 4 the anglec of rotation lower than 1 milli arc (i.e. 1mrad) time in, scanning galvanometer system 3 still can complete at least one complete scan period on post lens 4 arc surface.Suppose that the sweep frequency of scanning galvanometer system 3 is T1, the gyro frequency of post lens 4 is T2, according to above-mentioned condition, then should ensure that the time that post lens 4 have rotated 1mrad is not less than 1/T1, thus relational expression T2≤T1/ (2000 π) can be drawn, such as T1=200000Hz, as calculated, the gyro frequency of post lens 4 should be not more than 31Hz.Meet above-mentioned condition and then can be considered four variable light field L (x, y, z, θ) through the volumetric pixel radiation of print system output, and every individual pixel light field can be considered 360 ° of rotating cones of certain angle of orientation sector.The high frequency sweep of scanning galvanometer system 3 and the rotation acting in conjunction of post lens 4, can be understood as, volumetric pixel is no longer single pixel, but the combination of sub-pixel by many corresponding different visual fields (in direction of scanning), the grand pixel of the micro-Large visual angle of common synthesis, the position of the sub-pixel of different field angle is different, abuts against together, the imaging definition of lenticule recording materials 1 pair of small field of view light field is high, thus the dynamic sense of 3D optical field imaging is strong.As shown in figure 11, adopt this routine implementation method to print a cube model, during reproduction, observer not only can see this 3D model from a certain position, also can make 360 ° of panoramas around this model and observe.Fix position when observing, and human eye partly have received the field information of this model, now, can by overturning lenticule recording materials 1 up and down, visible dynamic 3D effect; When being used as panorama observation, namely keep object space position motionless, observer rotates around this object, and can observe each azimuth information of 3D object all around, the space sense of reality strengthens greatly.

Embodiment 4:

The z-axis height of lenticule recording materials 1 in optical field imaging printing equipment shown in fixing Fig. 6, and the angle of orientation of fixed leg lens 4 is θ, parametric controller only does the movement in x-y direction, then four-dimensional volumetric pixel light field is expressed and is reduced to two-dimentional L1 (x, y), can print accordingly there is various visual angles or the suspension at consecutive variations visual angle or the two-dimension light field figure of sinking.With the existing patent described in background technology unlike, printing various visual angles X-Y scheme in the present invention program does not need the printing of various visual angles figure one width, but utilize the mode of vibration mirror scanning directly to export a grand pixel, this grand pixel includes the sub-pixel of many different visual angles, and each sub-pixel correspond to the pixel of various visual angles figure to be entered.

For the ease of better understanding, with reference to Fig. 7,8,12, in Fig. 7, light beam 71,72,73 is three light beams (and only doing this discrete scanning in three positions in each scan period) in certain scan period, three of its correspondence print light beam and are respectively 711,721,731 in accompanying drawing 8, point out above, 711,721,731 three different incident visual angles are represented respectively, the pulse switch of light source 2 is controlled during scanning, namely these three convergent beams available represent three pixels on three width visual angle figure same positions respectively, and these three sub-pixels then constitute grand pixel V.Laser pulse Push And Release, should control according to the Pixel Information of figure to be entered.See the pixel arrangement shown in Figure 12, figure being three width two-value visual angle figure, the rectangular slat arrangement of two, top represents the grand pixel be made up of three pixel ordered arrangements on three width visual angle figure same positions.Open with pulse laser and represent pixel value 1, pulse laser closes and represents pixel value 0, then in Fig. 8, grand pixel V can be made up of three sub-pixels v1, v2, v3 respectively, utilize the Push And Release of pulse laser, V value can be expressed as 1-1-1, when moving to next position, scanning galvanometer system 3 is this three visual angles light of multiple scanning on post lens 4, according to the Pixel Information of figure, export the grand pixel value V ' of three sub-pixel compositions of this position, be 1-0-1 as shown in figure 12, by that analogy, until export the Pixel Information of all visual angles figure.Can see, 3 Pixel Information of each Position input are the ordered arrangements of every width visual angle figure same position, such as often open multi-view image prime matrix (1,1) the order arrangement of position, because the sweep frequency of scanning galvanometer system 2 is high, this method batch input various visual angles figure has instantaneity, and there is not the alignment issues repeatedly inputting visual angle figure, and thus efficiency is high.When especially making continuous visual angle change figure, this efficiency is difficult in existing program reach.

Figure to be entered in the present embodiment is not limited to the various visual angles figure of same object, also can be the X-Y scheme of different objects.When input be several visual angles figure of same object time, because observers can receive the visual angle figure with parallax respectively, through brain, two width parallax perspective views are synthesized, can feel the stereoeffect of object relative material surface flotation or sinking, rock lenticule recording materials 1 to change observation visual angle, visible significantly dynamic 3D effect.If input is different object representation, rock the visible dynamic change figure effect of lenticule recording materials 1, as observed a rabbit of running, existing description, repeats no more above.When completing above-mentioned various visual angles figure light field L1 (x, y) and inputting, change the angle of orientation of post lens 4, the input of next group various visual angles figure light field L2 (x, y) can be carried out, realize the multiple utilization of material the same space.

Embodiment 5:

In above-mentioned embodiment 4, print light field data L1 (x, y), after, the height of adjustment x-y-z platform, follows the prescribed rules and prints another light field data L2 (x, y), then can reproduce a floating image and a sinking images, when observing this floating sinking images, will strong 3D depth of field sense be obtained, and in the sector that the angle of orientation is, continuously change visual angle, visible significantly dynamic effect.Floating ribbon 9 shown in Figure 13, the sinusoidal ribbon 91 of two-dimension light field L1 print data correspondence floating, the corresponding sinking ribbon 92 of light field data L2 print data, the sinusoidal ribbon 91 that floats is all identical with sinusoidal ribbon 92 Amplitude and period of sinking, the two phase phase difference of pi/4, position, view is the relative position relation of the sinusoidal ribbon 91 of floating that observer observes when visual angle a and the sinusoidal ribbon 92 that sinks above, medial view is another relative position relation of the sinusoidal ribbon 91 of floating that observer observes when visual angle b and the sinusoidal ribbon 92 that sinks, underlying view is the geometric space position that the sinusoidal ribbon 91 of the floating observed when visual angle c of observer presents with the sinusoidal ribbon 92 that sinks.Visible, when visual angle is different, two sinusoidal ribbons there occurs dislocation, and observer visual angle changes to c from a continuously, and namely between visible two ribbons, relative position has obviously dynamic change.

Embodiment 6:

Refer to Figure 14, Figure 14 by the post lens 4 used in aforementioned the present invention with the symmetrical spherical lens 8 of circle or or the non-spherical lens that matches of focusing power better and numerical aperture and post lens, or the compound lens with aberration correction substitutes, this spherical lens 8 numerical aperture NA is not less than the numerical aperture NA of post lens 4.When scanning galvanometer system 3 along spherical lens 8 horizontal symmetry axis dimension linear scanning time, convergent lens group 6 output terminal also can obtain sector territory volumetric pixel light field, control ray trajectory scans along the horizontal symmetry axis of different orientation, namely without the need to column spinner lens 4, utilize non-rotating spherical lens 8 also can obtain the sector of different orientation, realize the printing model in the present invention.Refer to Figure 15, Figure 15 is the elevational projection of scanning galvanometer system 3 at spherical lens 8 surface scan track, and line segment 81,82 is two horizontal symmetry axis of spherical lens 8, simultaneously the scanning ray of line segment 81,82 to be also the angle of orientation be respectively θ 3, θ 4.In the present embodiment, the angle of orientation of scanning ray is the θ variable in four variable light field L (x, y, z, θ).Difference is the focused light spot of cylindrical lens 4 is sleeve configurations, due to only one-dimensional focusing, the uneven impact of Gauss's hot spot is little, is conducive to the light intensity uniformity that the sub-pixel tiling on direction of scanning prints, can provides the image quality of excellent microlens array and the effect of spatial reuse.And adopt the advantage of spherical lens 8 to be, do not need machinery to rotate and can obtain angle of orientation variable θ, but utilize the focusing of symmetric spherical lens 8, the uneven utilizable energy amount efficiency that makes of Gauss's hot spot reduces, simultaneously, owing to still there is focusing effect in another dimension direction, thus for sub-pixel described in embodiment 4, its observable viewing angle distribution has space circle symmetry, when observing with different orientation angle, easily there is crosstalk with the picture of the last angle of orientation in reproduction image, thus the observation reducing dynamic 3D is experienced.So the scheme that the present invention preferably adopts post lens to rotate.

In sum, the change that the scanning galvanometer system that mainly utilizes the optical field imaging printing equipment in the present invention scans in conjunction with 3 d space coordinate on lens face prints to realize four-dimensional light field data.Laser pulse switch, post lens rotate, galvanometer system scans, x-y-z platform movement all needs to control according to graphical information harmonious orderly to be entered.Thus, realizing the film of more real Three-Dimensional Dynamic sense image, by controlling different variate-values, realizing the floating image of multiple different qualities.Guarantee the imaging effect that can realize such as various visual angles change figure, the three dimensional viewing that can obtain again real-world object is more experienced.In addition, also can print different images from the different angles of orientation, preparation has the stereo-picture film of spatial reuse.

To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.

In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.

Claims (13)

1. an optical field imaging printing equipment, it is characterized in that: comprise light source, scanning galvanometer system, lens, diffusion sheet, convergent lens group and lenticule recording materials, described scanning galvanometer system comprises galvanometer and f-theta lens, described lens are placed in the focal plane place of f-theta lens, described diffusion sheet is placed on the focal plane of lens, diffusion sheet keeps one section of adjustable distance with the upper end assembling lens combination, described light source Emission Lasers, light is successively through scanning galvanometer system, lens, diffusion sheet and convergence lens combination, export the focal beam spot of transient behavior, obtain volumetric pixel radiation light field, again by described lenticule recording materials record instantaneous body pixel radiation field information.

2. a kind of optical field imaging printing equipment as claimed in claim 1, it is characterized in that: described lenticule recording materials comprise microlens array and are positioned at the light-sensitive layer below microlens array, described microlens array is the array that micron-sized lens form by clear aperature and relief depth, and described light-sensitive layer is that irreversible light becomes material.

3. a kind of optical field imaging printing equipment as claimed in claim 1, it is characterized in that: described light source Emission Lasers, through scanning galvanometer system exit light, linear sweep is done at lens surface, form scanning ray bunch, after lens, scanning ray bunch is focused at described diffusion sheet surface, and be scattered out, described convergent lens group is carried out collection to light beam and is assembled.

4. a kind of optical field imaging printing equipment as claimed in claim 1, is characterized in that: when printing three-dimensional body, and the x-y-z platform at mobile described lenticule recording materials place obtains the volumetric pixel of different spatial.

5. a kind of optical field imaging printing equipment as claimed in claim 1, it is characterized in that: described volumetric pixel radiation light field is controlled by four Independent Parameters, comprise three dimensional space coordinate variable and lens orientation angle variable, can free valued combinations between variable, four-dimensional variable is fallen into three-dimensional or two-dimentional.

6. a kind of optical field imaging printing equipment as claimed in claim 5, it is characterized in that: the fixing z-axis height of described lenticule recording materials and the angle of orientation of lens, the movement in x-y direction only done by the platform at lenticule recording materials place, then four-dimensional volumetric pixel light field is expressed and is reduced to two dimension, print thus and there is various visual angles or the suspension at consecutive variations visual angle or the two-dimension light field figure of sinking, utilize galvanometer scanning system, direct output grand pixel, described grand pixel includes the sub-pixel of many different visual angles, and each sub-pixel correspond to the pixel of various visual angles figure to be entered.

7. a kind of optical field imaging printing equipment as claimed in claim 5, is characterized in that: described lens select the symmetrical spherical lens of post lens, circle, focusing power better and numerical aperture and post the lens non-spherical lens, the one had in the compound lens of aberration correction that match.

8. a kind of optical field imaging printing equipment as claimed in claim 7, it is characterized in that: post lens selected by described lens, the numerical aperture of post lens is between 0.3 ~ 0.95, to incident ray at one dimension direction focusing, another ties up direct transmitted ray, and the light beam being continued to propagate by convergent point becomes sector territory to spread.

9. a kind of optical field imaging printing equipment as claimed in claim 8, it is characterized in that: described post lens rotate around the Z axis of himself geometric center, the anglec of rotation of post lens determines the angle of orientation of sector territory radiation light field, when adopting a certain angle of orientation definite value to print 3 d light fields data, observer can only observe image in the sector of this angle of orientation, when departing from this angle of orientation, then picture drop-out or the image observed in the oriented surface after departing from.

10. a kind of optical field imaging printing equipment as claimed in claim 7, it is characterized in that: spherical lens selected by described lens, described scanning galvanometer system scans along the horizontal symmetry axis dimension linear of spherical lens, and convergent lens group output terminal obtains sector territory volumetric pixel radiation light field.

11. 1 kinds of films with three-dimensional floating image, optical field imaging printing equipment preparation according to any one of claim 1-10, it is characterized in that: the field information that have recorded one or more object, the floating image suspending relative to film surface or sink can be reproduced, described floating image is synthesized by the subgraph of multiple different visual angles, can observe from different spatial view.

12. a kind of films with three-dimensional floating image as claimed in claim 11, it is characterized in that: the image observed in an oriented surface, various visual angles figure or several different images of same object, when departing from described oriented surface, then picture drop-out or the image observed in the oriented surface after departing from.

13. a kind of films with three-dimensional floating image as claimed in claim 11, it is characterized in that: described floating image is two dimensional image or 3-D view, during for 3-D view, floating image be apparent in above film, the three-dimensional depth image of thin film planar or below, or from a degree of depth to another degree of depth continually varying 3-D view.