CN104238256A - Raster scanning type three-dimensional printing machine - Google Patents
Raster scanning type three-dimensional printing machine Download PDFInfo
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- CN104238256A CN104238256A CN201310226047.5A CN201310226047A CN104238256A CN 104238256 A CN104238256 A CN 104238256A CN 201310226047 A CN201310226047 A CN 201310226047A CN 104238256 A CN104238256 A CN 104238256A
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Abstract
The invention discloses a raster scanning type three-dimensional printing machine. A direct printing principle is adopted. A high-definition LCD screen is used as an image source. An LED point light source illuminates to the LCD screen. Exposure is performed on the photosensitive material through a scanning raster. Multiple times of exposure are performed on a micro-displacement scanning raster or the photosensitive material for improving the resolution of an output image. The raster scanning type three-dimensional printing machine is composed of an exposure unit and a flushing system. The exposure unit is composed of a control computer, an exposure light source, an LCD screen, the scanning raster, a photosensitive material fixing platform and a scanning displacement mechanism. Compared with other planar output equipment, the raster scanning type three-dimensional printing machine is advantageous in that: resolution is improved by more than 10 times; high stereo perception, comfortable viewing and no dizzy feeling are realized; and the raster scanning type three-dimensional printing machine can be widely applied for the industries of photography, advertisement, etc.
Description
Technical field:
The present invention relates to a kind of digital picture output device, more particularly, relate to a kind of digital photo print apparatus exporting stereoscopic photograph, described photo print apparatus can be used for the high precision output of stereoscopic photograph, tridimensional advertisement sheet.
Background technology:
Main flow digital color enlargement machine image output technology comprises LASER technology and LDD technology.LASER technology and laser method, by red, green, blue three look laser tube, digital electric signal is converted into red, green, blue to be exposed to printing paper, laser have monochromaticity good, almost without features such as diffusions, the obtained sharpness of energy, acutance are very high, the feature of the very distinct photo of color, and are easy to the exposure realizing large format.Laser beam is directly sent to printing paper and makes it photosensitive, do not need the participation of imaging lens, and be generally that the laser beam of the three kinds of different colours sent by red, green, blue three look laser instrument converges to together photosensitive on printing paper, thus there is color drift phenomenon hardly, there is not the phenomenon that picture edge and picture intermediate imagery sharpness differ, the image output accuracy of about 200 ~ 400DPI can be realized.
LDD technology adopts projection-type liquid crystal display (hereinafter referred to as LCD), LCD is a kind of projection-type gray scale TFT, the resolution of liquid crystal is 1200*1600, the pixel of liquid crystal display photo of enlarging and print itself is only relied on to be far from being enough, therefore this series products is often through the transverse direction of pixel and longitudinal changing of the relative positions, and point four positions exposures and nine positions expose improves resolution.Each position needs through RGB three exposures, therefore making a digital photograph needs action 12 times and 27 displacement exposures.The LED array light emitting diode that it adopts pointwise adjustable is as light source, and the LCD adjustable with pointwise coordinates, and have the ability that double digital code regulates, LED has the excitation identical with laser instrument to printing paper imaging.Therefore, LDD photo of enlarging and print has good color representation power.Under normal circumstances, the aperture opening ratio of the producer high temperature LCD such as Sony, Epson is 40-60%, adopts " pixel Jogging technology " to improve resolution by imaging pixel in diverse location exposure, the image within 16 cun can realize the output accuracy of 200 ~ 300DPI.
Another kind of image output mode adopts high-precision description spray drawing machine, and EPSON wide format printer is the first-selection exporting raster stereoscopic picture.Weak point is, the diffusion of ink dot brings the fusion between image neighbor, and the true resolution of printer is not high, exports actual effect higher than 75 line grating stereotomes and badly just describes this point.Directly export stereo-picture with LASER exposure technique, LDD exposure technique and high precision description air brushing, all there is the shortcoming that output resolution ratio is not high enough.
Another approach that stereoscopic photograph exports is, each parallax sequence image is projected on column mirror grating respectively at a certain angle by enlarging lens, after being focused on by post mirror, photosensitive material is exposed, the synthesis of stereo-picture is realized by column mirror grating, image has higher resolution, but most of light is the non-paraxial light of oblique incidence, all can not be focused into fine rule, there is obstacle in further raising image resolution ratio, the stereoscopic photograph of output exists more serious light and shade flicker.
Asymmetric precision is conducive to exporting high-definition three-dimensional image, high lateral resolution, 2000 ~ 8000DPI, can by more parallax sequence Images uniting in stereo-picture, the ghost image at depth of field place before and after reducing, the requirement of " transfixion " during portrait can be reduced simultaneously, avoid expression and ossify; Lower longitudinal frame, can alleviate the data volume of image procossing, reduces exposure frequency.
Stereoscopic digital printer disclosed in patented claim 2010105874136, adopt direct printing principle, by high-resolution LCD screen as image source, mask technique is adopted to reduce sub-pixel size, pointolite or line source are projected in LCD screen and photosensitive material is exposed, micrometric displacement LCD screen is carried out multiexposure, multiple exposure and is improved image resolution ratio, can export the stereo-picture of any pitch.Weak point is: the accuracy requirement of mask grating is high, low with LCD screen mount success ratio; During scan exposure and photosensitive material rub and easily wear and tear, replacement cost is high; The LCD screen rapid wear of large format, yielding, be difficult to keep close contact all and between photosensitive material everywhere during micrometric displacement, affect the output accuracy of stereotome; Because mask grating has directivity, maximum breadth is only suitable for exporting banner image.
Summary of the invention:
The invention discloses a kind of structure and principle of grating scanning type three-dimensional print camera, object is to provide one can export high-definition three-dimensional photo, and use cost is low, be easy to the exposure sources safeguarded.
Grating scanning type three-dimensional print camera adopts direct printing principle, by LCD screen as image source, pointolite projects image onto raster and exposes photosensitive material, and micrometric displacement raster or photosensitive material carry out the lateral resolution that multiexposure, multiple exposure improves stereo-picture.
Grating scanning type three-dimensional print camera is made up of exposing unit, rinse-system.As depicted in figs. 1 and 2, exposing unit is formed by controlling computer (9), exposure light source (6), LCD screen (1), raster (2), photosensitive material stationary platform and scanning shift mechanism (5).Control computer (9) parallax sequence image to be presented in LCD screen (1), image projects on photosensitive material (3) through raster (2) by exposure light source (6), control computer (9) accurately controls each LED group (10) in exposure light source (6) time shutter by relay, after exposure, micrometric displacement raster (2) or photosensitive material (3), change next parallax sequence image and expose.After all parallax sequence image exposures, photosensitive material (3) enters rinse-system development, fixing, oven dry, is compounded to form stereoscopic photograph with 3 D grating.
Several concept easily obscured first is described.
The difference of raster and 3 D grating: raster is slit grating, design to pursue ultimate attainment scanning fine rule, its transmissive slit is superfine and border is sharp keen, is the critical component of three-dimensional print camera; 3 D grating can be column mirror grating, also can be slit grating, is compounded to form stereoscopic photograph with the stereo-picture exported.Unless stated otherwise, in the present invention, raster is identical with the pitch of 3 D grating.
Parallax sequence image, stereo-picture, exposure sequence image: parallax sequence image is a series of digital pictures with horizontal parallax that stereoscopic shooting obtains; A series of parallax sequence image sampling is combined to form a width stereo-picture, in the present invention, after all parallax sequence image scanning exposures, forms a width stereo-picture; Because the resolution of LCD screen is not high, in order to improve the sharpness of parallax sequence image, every width picture breakdown can be become N width to expose sequence image, expose respectively by the LED group (10) of exposure light source (6) interior diverse location, because angle of incidence of light is different, between each projects images pixel, mutual dislocation forms interpolation relation, as shown in Figure 5, can promote clearness, the reticulate pattern of image can also be alleviated simultaneously.
The following describes the process realizing high-definition three-dimensional photo and export.
Exposure light source (6) is made up of at least one group of LED, at least one redness, green, a blue led lamp is comprised in LED group (10), closely combine together, every look LED all can control the time shutter separately, and between each group LED, tool is at regular intervals.Make exposure light source by LED can control by full-electronic, without shutter, without colour filter mechanism, simple for structure, stable.In order to allow as far as possible, LCD screen is middle obtains more consistent incident ray (8) with corner, light path between exposure light source (6) and LCD screen (1) is not less than 1 meter, as shown in Figure 1, between exposure light source (6) and LCD screen (1), add 1 ~ 2 reflective mirror (7) reduce the space that exposing unit occupies, LED group (10) can regard a pointolite as.As shown in Figure 4,6 LED groups (10) are fixedly mounted on radiating bottom plate (11), and each lamp group is about 1.5 times of Y-direction in the spacing of X-direction.
Image source can adopt black and white LCD screen or color LCD screen, and difference between the two is only with or without chromatic filter layer.As shown in Figure 3A, a pixel of color LCD screen is made up of R, G, B sub-pixel (4); As shown in Figure 3 B, a pixel of black and white LCD screen is made up of 3 sub-pixels (4), and resolution brings up to 3 times in the Y direction.Alternating floor glass between LCD screen (1) and raster (2), under different LED lamp group (10) is irradiated, the image be projected in raster (2) has certain dislocation, be equivalent to promote image resolution ratio with hardware method of interpolation, to stagger half-pixel in X-direction, insert a pixel between two pixels and improve exposure resolution ratio, can also the vestige of smooth pixel grid, alleviate with 3 D grating compound after the reticulate pattern that occurs.
Raster (2) adopts slit grating, mount is on the optical glass matrix that transparency is good, thickness of glass 1.5 ~ 4mm, slit grating is positioned at glass just to the one side of photosensitive material (3), and separation glass layer between LCD screen (1).Gap between slit grating and photosensitive material is the smaller the better, but must can relative movement.As shown in Figure 7, slit grating is made up of light transmission strip (16) and shading strip (17), and light transmission strip (16) width about 5 ~ 20 microns, the thinner precision of images is higher, and the corresponding time shutter is longer.For meeting the raster requirement identical with the pitch of 3 D grating, slit grating should produce specification one to one according to the pitch of different 3 D grating, in the present invention, raster (2) and LCD screen (1) do not have strict position corresponding relation, do not need close contact to install, change very convenient.Because LCD screen image exists network, although misalignment of pixels exposure can eliminate Partial Mesh, still easily there is allowing the uncomfortable reticulate pattern of people with 3 D grating compound tense, in the present invention, the grid line design of raster is become and Y-direction cant angle theta angle, eliminate reticulate pattern, when being combined into stereoscopic photograph, 3 D grating also will tilt identical angle.
Scanning shift mechanism is made up of bearing (12), slide block (13), slide rail (14), turntable driving module (15), traversing carriage (18).Traversing carriage (18) is fixed on slide block (13), under the driving of turntable driving module (15), slide block (13) moves along slide rail (14) in X-direction, slide rail (14) is fixed on bearing (12), as shown in Figure 6.The displacement drive of turntable driving module (15) is rotated by step motor control milscale and realizes, and measures displacement in real time with length gauge and feed back to stepper motor, and displacement accuracy can reach 1 micron.Traversing carriage (18) can carry raster (2) and carry out scanning shift exposure, and now to move with it effect as a whole together better for LCD screen (1); Traversing carriage (18) also can carry photosensitive material stationary platform, deadweight is relied on to be pressed together in raster (2) by photosensitive material (3), turntable driving module (15) promotes photosensitive material stationary platform at X-direction single-way moving certain distance, eliminate spacious amount and after flattening photosensitive material (3), start scanning shift exposure, now raster (2) and LCD screen (1) maintain static.These two kinds of scanning shift modes are equivalent, conveniently, below all move with raster and describe.
After often completing a parallax sequence image exposure process, raster is moved in X-direction and is moved a step, and step-length is d, and the pitch of raster is P, and total displacement is D, X-direction resolution V
x=25.4/d, D=M*d=P/cos θ, M width parallax sequence image is divided into the exposure that M step has scanned whole stereoscopic photograph.When step-length is 5 microns, V
x=5080dpi, reach so high resolution, and the width that must ensure to reach the sweep trace of threshold exposure through raster is lower than 2 times of step-length.
When tilt angle theta ≠ 0, at the sweep trace of X-direction movement, also there is motion scan component in the Y direction, can not only export and the vertical scroll of painting or calligraphy stereoscopic photograph of LCD screen with size, also can export banner stereoscopic photograph.As shown in Figure 7 A, the scope of raster tilt angle theta is at 15 ° ~ 45 °, and the parallax of parallax sequence image is in X-direction, and LCD screen shows vertical scroll of painting or calligraphy image, and θ ≈ 25 ° is good; As shown in Figure 7 B, the scope of raster tilt angle theta is at 45 ° ~ 75 °, and in the Y direction, LCD screen shows banner image to the parallax of parallax sequence image, θ ≈ 65 ° is good, and parallax sequence image needs to offset in X-direction the focus vertical dislocation brought with compensated scanning displacement in advance.When the pitch of raster is 1 or 2 times of the image source pixel distance of projection, the grid line of raster can be consistent with Y-direction, and 3 D grating is straight burr grating.
Control computer (9) and complete four functions: parallax sequence Image semantic classification, display, exposure, raster moves.Four kinds of situations are divided to process respectively.
1. image source adopts black and white LCD screen.
Each pixel of LCD screen is made up of 3 sub-pixels, and the width of sub-pixel is 1/3 of pixel wide, and the primary resolution of LCD screen is P
y* P
x, be all assumed to be 1600*1200 to illustrate below, the resolution of display gray scale image can reach (1600*3) * 1200, and Y-direction has had sufficiently high sharpness no longer needs interpolation.Light source exposure is done by L2 and L5 two LED groups, its image be projected in raster has the dislocation of half-pixel in X-direction, interpolated resolution reaches (1600*3) * (1200*2), be limited to the aperture opening ratio of pixel, the interpolated resolution of further raising X-direction has little significance, but the LED that X-direction arranges is increased to many groups by two groups, the network of image can be improved further.
Non-for the parallax sequence image of rgb format geometric ratio interpolation processing is become (1600*3) * (1200*2), color is anti-phase, extract pixel in X-direction interlacing and be reassembled into two width RGB images, be labeled as T1 and T2 respectively, resolution is (1600*3) * 1200, T1 and T2 is resolved into 6 gray level images by RGB Color Channel, be labeled as G1 (r), G1 (g), G1 (b) and G2 (r), G2 (g), G2 (b) respectively, resolution is (1600*3) * 1200, can point-to-point display in black and white LCD screen.The exposure process of one width parallax sequence image is as follows:
LCD screen display image G1 (r), opens the exposure of L5 red light;
LCD screen display image G1 (g), opens the exposure of L5 green light;
LCD screen display image G1 (b), opens the blue lamp exposure of L5;
LCD screen display image G2 (r), opens the exposure of L2 red light;
LCD screen display image G2 (g), opens the exposure of L2 green light;
LCD screen display image G2 (b), opens the blue lamp exposure of L2;
Raster moves a step-length d, and a width parallax sequence exposure map is complete.The exposure cycle that stereoscopic photograph is complete comprises the exposure process of whole M parallax sequence image.
2. image source adopts color LCD screen.
Color LCD screen possesses RGB filter layer, addition chromogen is utilized to manage video picture, and when exposing, use subtraction look, namely on photosensitive material, same position has to pass through RGB tri-coloured light superposition exposure, correct color could be shown, therefore at least need L1, L2, L3 lamp group to arrange in the Y direction, adjacent 3 sub-pixels are projected same point exposure.In order to realize interpolation exposure in X-direction, also need to increase L4, L5, L6 lamp group again, as shown in Figure 4, its spacing is directly proportional to the light path of light source to LCD screen, be inversely proportional to the spacing of LCD screen to raster, require that two adjacent groups lamp to stagger half-pixel in X-direction projection, projection is staggered 1 sub-pixel in the Y direction.
Non-for the parallax sequence image of rgb format geometric ratio interpolation processing is become (1600*3) * (1200*2), extract pixel in X-direction interlacing and be reassembled into two width RGB images, be labeled as T1 and T2 respectively, resolution is (1600*3) * 1200.T1 is resolved into 3 width RGB images, be labeled as G1 (1), G1 (2), G1 (3), T2 is resolved into 3 width RGB images, be labeled as G2 (4), G2 (5), G2 (6), resolution is 1600*1200, can point-to-point display on color LCD screen, concrete isolation is relevant with putting in order of RGB sub-pixel, need ensure same pixel three color component energy overlapping exposures.The exposure process of one width parallax sequence image is as follows:
LCD screen display image G1 (1), opens L1 group R, the exposure of G, B lamp;
LCD screen display image G1 (2), opens L2 group R, the exposure of G, B lamp;
LCD screen display image G1 (3), opens L3 group R, the exposure of G, B lamp;
LCD screen display image G2 (4), opens L4 group R, the exposure of G, B lamp;
LCD screen display image G2 (5), opens L5 group R, the exposure of G, B lamp;
LCD screen display image G2 (6), opens L6 group R, the exposure of G, B lamp;
Raster moves a step-length d, and a width parallax sequence exposure map is complete.The exposure cycle that stereoscopic photograph is complete comprises the exposure process of whole M parallax sequence image.In one group of lamp, the time shutter of R, G, B lamp can set separately.
3. dislocation-free interpolation exposure.
The resolution that in most cases LCD screen is primary is enough clear, does not need the exposure of dislocation interpolation to promote clearness, directly becomes 1600*1200 to expose the parallax sequence image geometric ratio interpolation processing of rgb format.For black and white LCD screen, resolve into 3 gray level images by RGB Color Channel, be labeled as G (r), G (g), G (b) respectively, resolution is 1600*1200, adopt L2 lamp group one during exposure, adopt L2, L5 two groups of lamps to alleviate reticulate pattern.The exposure process of one width parallax sequence image is as follows:
LCD screen display image G (r), opens the exposure of L2, L5 red light;
LCD screen display image G (g), opens the exposure of L2, L5 green light;
LCD screen display image G (b), opens the blue lamp exposure of L2, L5;
Raster moves a step-length d, and a width parallax sequence exposure map is complete.
For color LCD screen, directly parallax sequence image is shown, expose by L1, L2, L3 lamp group simultaneously, L1, L2, L3, L4, L5, L6 lamp group also can be adopted simultaneously to expose and alleviate reticulate pattern.In order to obtain suitable exposure, in one group of lamp, the time shutter of R, G, B lamp needs setting separately.
4. when adopting significantly LCD screen to make image source, and the pitch of 3 D grating is less, pixel is apart from when being greater than pitch, even if the sharpness of parallax sequence image also can not be guaranteed through dislocation interpolation, solution is 2 times that the pitch of raster (2) are arranged to 3 D grating, and parallax sequence image resolves into two width by odd number, even column, forms the parallax sequence image that two groups of 2M width are new altogether, first scan exposure odd column group parallax sequence figure, then expose even column group parallax sequence figure.
Accompanying drawing illustrates:
Fig. 1 is exposing unit structural representation.
Fig. 2 is LCD screen, raster and photosensitive material position relationship schematic diagram.
Fig. 3 A is color LCD screen image element structural representation, and Fig. 3 B is black and white LCD screen dot structure schematic diagram.
Fig. 4 is exposure light source schematic diagram.
Fig. 5 is two groups of lamp exposure image misalignment of pixels interpolation schematic diagram.
Fig. 6 is scanning shift structural scheme of mechanism.
Fig. 7 A is vertical scroll of painting or calligraphy image scanning grating schematic diagram, and Fig. 7 B is banner image scanning grating schematic diagram.
Shown by reference numeral in above-mentioned each accompanying drawing is:
1LCD shields, 2 raster, 3 photosensitive materials, the sub-pixel of 4LCD screen, 5 photosensitive material stationary platforms and scanning shift mechanism, 6 exposure light sources, 7 reflective mirrors, 8 incident raies, 9 control computer, 10LED lamp group, 11 radiating bottom plates, 12 bearings, 13 slide blocks, 14 slide rails, 15 turntable driving modules, 16 light transmission strips, 17 shading strips, 18 traversing carriages.
Grating scanning type three-dimensional print camera disclosed by the invention, compared with laser enlargement of color photos, the plane output devices such as air brushing of drawing a portrait, its lateral resolution improves more than 10 times, the stereoscopic photograph that exposure exports has the advantage that precision is high, stereoscopic sensation is strong, its sharpness matches in excellence or beauty high-precision plane picture completely, watch comfortable nothing to feel dizzy sense, photography and advertising sector can be widely used in.
Embodiment:
Case study on implementation one, sets up the exposing unit of grating scanning type three-dimensional print camera by black and white LCD screen.
Exposing unit is by controlling computer (9), the exposure light source (6) that L2, L5 two LED groups are formed, black and white LCD screen (1), raster (2), photosensitive material stationary platform and scanning shift mechanism (5) are formed.Light source is about 2M to the light path of LCD screen, middle employing two blocks of mirror reflection light, the glass basis thickness 2mm of raster, control computer (9) accurately controls each LED group (10) in exposure light source (6) time shutter by relay, 1 millisecond can be accurate to, scanning shift mechanism (5) drives photosensitive material stationary platform at X-direction scanning shift, precision can reach 1 micron, the primary resolution of LCD screen is 1920*1200, and the sharpness of display black white image can reach (1920*3) * 1200.Non-for every width parallax sequence image geometric ratio interpolation processing is become (1920*3) * (1200*2), color is anti-phase, then the gray level image that 6 resolution are (1920*3) * 1200 is resolved into, be presented at successively in black and white LCD screen and expose, after one width parallax sequence exposure map, the mobile step-length d of photosensitive material (3), carries out the exposure process of next width parallax sequence image.After all parallax sequence image exposures, photosensitive material (3) enters rinse-system development, fixing, oven dry, is compounded to form stereoscopic photograph with 3 D grating.Be that raster is overlapped in an at least supporting preparation 4 of exposing unit:
1. raster pitch 0.3618mm, θ=25 °, D=0.3992mm, d=0.3992/M, M are parallax sequence figure quantity, are used for exposure 70 line vertical scroll of painting or calligraphy 3 D grating photo.
2. raster pitch 0.3618mm, θ=65 °, D=0.8561mm, d=0.8561/M, M are parallax sequence figure quantity, are used for exposure 70 line banner 3 D grating photo.
3. raster pitch 0.635mm, θ=25 °, D=0.7006mm, d=0.7006/M, M are parallax sequence figure quantity, are used for exposure 40 line vertical scroll of painting or calligraphy 3 D grating photo.
4. raster pitch 0.635mm, θ=65 °, D=1.5025mm, d=1.5025/M, M are parallax sequence figure quantity, are used for exposure 40 line banner 3 D grating photo.
Case study on implementation two, sets up grating scanning type three-dimensional print camera exposing unit with color LCD screen.
Exposing unit is by controlling computer (9), the exposure light source (6) that L1, L2, L3, L4, L5, L6 six LED groups are formed, color LCD screen (1), raster (2), photosensitive material stationary platform and scanning shift mechanism (5) are formed.Light source is about 2M to the light path of LCD screen, middle employing two blocks of mirror reflection light, the glass basis thickness 2mm of raster, control computer (9) accurately controls each LED group (10) in exposure light source (6) time shutter by relay, 1 millisecond can be accurate to, scanning shift mechanism (5) drives photosensitive material stationary platform at X-direction scanning shift, and precision can reach 1 micron, and the primary resolution of LCD screen is 1920*1200.Every width parallax sequence image geometric ratio interpolation processing is become 1920*1200, and color is anti-phase, then directly exposes parallax sequence image by 6 lamp groups, and the mobile step-length d of photosensitive material (3), carries out the exposure of next width parallax sequence image.After all parallax sequence image exposures, photosensitive material (3) enters rinse-system development, fixing, oven dry, is compounded to form stereoscopic photograph with 3 D grating.The same with case study on implementation one, for exposing unit at least prepares 4 cover raster.
The pitch of raster is 0.3618mm, identical with 70 DNA mitochondrial DNA grating pitches, and light transmission strip width is 10 microns, θ=25 °, total scanning shift amount D=0.3992mm, parallax sequence figure quantity M=70, moving step length d=5.7 micron.The exposure cycle that stereoscopic photograph is complete is as follows:
Photosensitive material is positioned at initial point, exposure parallax sequence image T
0;
Photosensitive material moves 5.7 microns, exposure parallax sequence image T
1;
Photosensitive material moves 5.7 microns, exposure parallax sequence image T
2;
Photosensitive material moves 5.7 microns, exposure parallax sequence image T
3;
…………
Photosensitive material moves 5.7 microns, exposure parallax sequence image T
68;
Photosensitive material moves 5.7 microns, exposure parallax sequence image T
69.
Expose complete, remove photosensitive material, photosensitive material stationary platform gets back to origin position.The displacement precision of raster is 1 micron, displacement round, and deviation accumulation is entered next step.
Claims (10)
1. a grating scanning type three-dimensional print camera, by exposing unit, rinse-system forms, it is characterized in that, exposing unit is by controlling computer, exposure light source, LCD screen, raster, photosensitive material stationary platform and scanning shift mechanism are formed, control computer by the display of parallax sequence image on the lcd screen, image projects on photosensitive material through raster by exposure light source, control computer expert to cross relay and accurately control the time of each LED group in exposure light source and expose, micrometric displacement raster or photosensitive material after exposure, change next parallax sequence image to expose, the resolution of output image is improved by multiexposure, multiple exposure.
2. three-dimensional print camera as claimed in claim 1, be further characterized in that, raster adopts slit grating, matrix is the optical glass that transparency is good, slit grating is positioned at glass just to the one side of photosensitive material, and separation glass layer between LCD screen, together with raster abuts against with photosensitive material, each other can micro-movement, exposure light source is made up of at least one group of LED, at least one is comprised red in LED group, a green, a blue led lamp, closely combine together, every look LED all can control the time shutter separately, between each group of LED, tool is at regular intervals, under different LED lamp group is irradiated, the image mutual dislocation that LCD screen projects in raster forms interpolation relation, improve the sharpness of image source, alleviate the grid vestige between pixel.
3. three-dimensional print camera as claimed in claim 2, be further characterized in that, image source adopts primary resolution to be P
y* P
xblack and white LCD screen, exposure light source is made up of two LED groups, is projected in image in raster and staggers half-pixel in X-direction, non-for the parallax sequence image of rgb format geometric ratio interpolation processing is become (P
y* 3) * (P
x* 2), color is anti-phase, extract pixel in X-direction interlacing and be reassembled into two width RGB images, be labeled as T1 and T2 respectively, T1 is resolved into 3 gray level images by RGB Color Channel, resolution is (P
y* 3) * P
x, expose respectively by the red, green, blue LED of a LED group, T2 resolved into 3 gray level images by RGB Color Channel, expose respectively by the red, green, blue LED of another LED group.
4. three-dimensional print camera as claimed in claim 2, be further characterized in that, image source adopts color LCD screen, exposure light source is made up of 6 LED groups, two adjacent groups lamp projects to image in raster and to stagger half-pixel in X-direction, stagger 1 sub-pixel in the Y direction, and non-for the parallax sequence image of rgb format geometric ratio interpolation processing is become (P
y* 3) * (P
x* 2), color is anti-phase, extract pixel in X-direction interlacing and be reassembled into two width RGB images, be labeled as T1 and T2 respectively, T1 is resolved into 3 width RGB images, be labeled as G1 (1), G1 (2), G1 (3), T2 is resolved into 3 width RGB images, be labeled as G2 (4), G2 (5), G2 (6), the LED group that each exploded view picture is corresponding exposes, after one width parallax sequence exposure map, raster or photosensitive material move a step-length d, carry out next width parallax sequence image exposure, complete exposure cycle comprises the exposure process of whole M parallax sequence image.
5. three-dimensional print camera as claimed in claim 2, is further characterized in that, the parallax sequence image geometric ratio interpolation processing of rgb format is become P
y* P
x, for black and white LCD screen, resolve into 3 gray level images by RGB Color Channel, adopt 1 or 2 lamp group to expose, for color LCD screen, directly parallax sequence image is shown, adopt 3 or 6 lamp groups to expose.
6. as claim 3, three-dimensional print camera described in 4 or 5, be further characterized in that, the grid line design of raster is become and Y-direction cant angle theta angle, eliminate the reticulate pattern produced with 3 D grating compound tense, after often completing a parallax sequence image exposure, scanning shift mechanism is at X-direction micro-movement step-length d, the pitch of raster is P, total displacement is D, D=M*d=P/cos θ, M is the quantity of parallax sequence image, suitably choose the value of M, the width ensureing to reach the sweep trace of threshold exposure through raster is lower than 2 times of step-length, be divided into M and walk the exposure that micro-movement completes whole stereoscopic photograph.
7. three-dimensional print camera as claimed in claim 6, is further characterized in that, the scope of raster tilt angle theta is at 15 ° ~ 45 °, and the parallax of parallax sequence image is in X-direction, and LCD screen display vertical scroll of painting or calligraphy image, exposure exports vertical scroll of painting or calligraphy stereoscopic photograph.
8. three-dimensional print camera as claimed in claim 6, is further characterized in that, the scope of raster tilt angle theta is at 45 ° ~ 75 °, and in the Y direction, LCD screen display banner image, exposure exports banner stereoscopic photograph to the parallax of parallax sequence image.
9. three-dimensional print camera as claimed in claim 2, is further characterized in that, the pitch of raster is 1 or 2 times of the image source pixel distance of projection, and the grid line of raster and the angle of inclination of Y-direction are 0 °, and 3 D grating is straight burr grating.
10. three-dimensional print camera as claimed in claim 6, be further characterized in that, traversing carriage is fixed on slide block, and under the driving of turntable driving module, slide block moves along slide rail in X-direction, slide rail is fixed on bearing, the displacement drive of turntable driving module is rotated by step motor control milscale and realizes, and measures displacement in real time with length gauge and feed back to stepper motor, and displacement accuracy can reach 1 micron, traversing carriage can drive raster displacement to expose, and photosensitive material displacement also can be driven to expose.
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