CN104238256B - Raster scanning type three-dimensional printing machine - Google Patents
Raster scanning type three-dimensional printing machine Download PDFInfo
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- CN104238256B CN104238256B CN201310226047.5A CN201310226047A CN104238256B CN 104238256 B CN104238256 B CN 104238256B CN 201310226047 A CN201310226047 A CN 201310226047A CN 104238256 B CN104238256 B CN 104238256B
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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 outut device, more particularly, it is related to a kind of number of output stereo
Photo print apparatus, described photo print apparatus can be used for the high accuracy output of stereo, tridimensional advertisement piece.
Background technology:
Main flow digital color enlargement machine image output technology includes laser technology and ldd technology.Laser technology is laser method, is
Digital electric signal is converted into by red, green, blue by the trichroism laser tube of red, green, blue and is exposed to printing paper, laser has monochromaticity
Good, almost without, the features such as diffusion, being obtained, definition, acutance be very high, the feature of the very distinct photo of color, and be easy to
Realize the exposure of large format.By laser beam be sent directly to printing paper be allowed to photosensitive it is not necessary to the participation of imaging lens, and typically
It is photosensitive on printing paper after the laser beam of three kinds of different colours sending red, green, blue tri-color laser converges to together, thus
There's almost no color drift phenomenon, there is not the phenomenon that picture edge and picture intermediate imagery definition differ, can achieve about
The image output accuracy of 200～400dpi.
Ldd technology adopt projection-type liquid crystal display screen (hereinafter referred to as lcd), lcd is a kind of projection-type gray scale tft, liquid crystal point
Resolution is 1200*1600, and the pixel photo of enlarging and print relying solely on liquid crystal display screen itself is far from being enough, and therefore this kind of product is often
By the transverse direction and longitudinal direction changing of the relative positions of pixel, point four position exposures and nine positions expose and to improve resolution.In each position
On need through RGB three times exposure, therefore making a digital photograph needs action 12 times and 27 displacements to expose.It is adopted
With pointwise adjustable led array light-emitting diode as light source, lcd cooperation adjustable with pointwise, have double digital code regulation
Ability, led has and laser instrument identical excitation 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 such as sony, epson high temperature lcd is 40-60%, is passed through using " pixel Jogging technology "
Imaging pixel exposes to improve resolution in diverse location, can achieve the output of 200～300dpi on the image within 16 cun
Precision.
Another kind of image output mode is using high-precision description spray drawing machine, and epson wide format printer is output light
The first-selection of grid stereo-picture.It is disadvantageous in that, the diffusion of ink dot brings the fusion between image neighbor, printer
True resolution is not high, and output illustrates bad this point higher than the actual effect of 75 line grating stereotomes and just.Use laser
Exposure technique, ldd exposure technique and high accuracy description air brushing directly export stereo-picture, all there is output resolution ratio not high enough
Shortcoming.
Another approach of stereo output is that each parallax sequence image is passed through enlarging lens respectively with certain
Angle projects on column mirror grating, by post mirror focus on after to sensitive material expose, stereo-picture be synthesized by post mirror light
Grid are realized, and image has higher resolution, but most of light is the non-paraxial light of oblique incidence, can not all focus on
Become fine rule, improve image resolution ratio further and there is obstacle, the stereo of output has more serious light and shade flicker.
Asymmetric precision is conducive to exporting high-definition three-dimensional image, high lateral resolution, and 2000～8000dpi can
So that more parallax sequence images to be synthesized in stereo-picture, the ghost image at the depth of field before and after reduction, can reduce portrait simultaneously
The requirement of " transfixion " during shooting, it is to avoid expression ossifys；Relatively low longitudinal resolution, can mitigate the data of image procossing
Amount, reduces exposure frequency.
Stereoscopic digital printer disclosed in patent application 2010105874136, using direct printing principle, uses high-resolution
Lcd screen, as image source, reduces sub-pixel size using mask technique, and point source or line source are projected on lcd screen to sense
Luminescent material exposes, and micrometric displacement lcd screen carries out multiexposure, multiple exposure and improves image resolution ratio, can export the stereo-picture of any pitch.
It is disadvantageous in that: the required precision of mask grating is high, low with lcd screen mount success rate；During scan exposure and sensitive material
Friction is easily worn and torn, and replacement cost is high；The lcd screen rapid wear of large format, yielding, be difficult to during micrometric displacement to keep everywhere all with photosensitive
It is in close contact between material, the output accuracy of impact stereotome；Because mask grating has directivity, maximum breadth is only suitable for
Output banner image.
Content of the invention:
The invention discloses a kind of structure of grating scanning type solid photo print apparatus and principle are it is therefore intended that provide a kind of permissible
Output high-definition three-dimensional photo, use cost exposure sources low, easy to maintain.
Grating scanning type solid photo print apparatus adopt direct printing principle, and with lcd screen as image source, image is thrown by point source
It is mapped to raster sensitive material is exposed, micrometric displacement raster or sensitive material carry out multiexposure, multiple exposure and improve solid
The lateral resolution of image.
Grating scanning type solid photo print apparatus are made up of exposing unit, rinse-system.As depicted in figs. 1 and 2, exposing unit by
Control computer (9), exposure light source (6), lcd screen (1), raster (2), sensitive material fixed platform and scanning shift mechanism
(5) constitute.Control computer (9) that parallax sequence image is shown on lcd screen (1), exposure light source (6) is by image through scanning light
Grid (2) project on sensitive material (3), control computer (9) to pass through each LED lamp in relay precise control exposure light source (6)
The time of exposure of group (10), after exposure, micrometric displacement raster (2) or sensitive material (3), change next parallax sequence image
It is exposed.After all of parallax sequence image exposure finishes, sensitive material (3) enters rinse-system development, fixing, drying,
It is compounded to form stereo with 3 D grating.
The confusing concept of several appearance is first described.
Raster and the difference of 3 D grating: raster is slit grating, is to pursue ultimate attainment scanning fine rule
And design, its transmissive slit is superfine and border is sharp keen, is the critical component of three-dimensional photo print apparatus；3 D grating can be post mirror
Grating or slit grating, are compounded to form stereo with the stereo-picture of output.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 be stereoscopic shooting obtain a series of
There is the digital picture of horizontal disparity；A series of parallax sequence image samplings are combined and forms a width stereo-picture, in the present invention
Form a width stereo-picture after all parallax sequence image scanning exposures；Because the resolution of lcd screen is not high, in order to improve parallax
Each image can be resolved into n width exposure sequence image, with the interior diverse location of exposure light source (6) by the definition of sequence image
LED lamp group (10) expose respectively, because angle of incidence of light is different, between each projects images pixel, mutual dislocation forms interpolation and closes
System, as shown in figure 5, definition can be improved, can also mitigate the reticulate pattern of image simultaneously.
The process of high-definition three-dimensional photo output is realized in explanation below.
Exposure light source (6) is made up of least one set LED lamp, comprise in LED lamp group (10) that at least one is red, one green
Color, a blue LED lamp, closely combine together, every color LED lamp all can individually control time of exposure, have between each group LED lamp
At regular intervals.Make exposure light source with LED lamp can all-electronin control, no shutter, no colour filter mechanism, simple for structure, stable.
In order to allow as far as possible, lcd screen is middle to obtain more consistent incident ray (8) with corner, between exposure light source (6) and lcd screen (1)
Light path be not less than 1 meter, as shown in figure 1, between exposure light source (6) and lcd screen (1) addition 1～2 illuminator (7) to contract
The space that little exposing unit occupies, LED lamp group (10) can regard a point source as.As shown in figure 4,6 LED lamp groups (10) are solid
Dingan County is contained on radiating bottom plate (11), and each lamp group is at 1.5 times that are spaced about y direction of x direction.
Image source can be only that and be had or not chromatic filter layer using black and white lcd screen or colored lcd screen, difference between the two.
As shown in Figure 3 a, a pixel of colored lcd screen is made up of r, g, b sub-pixel (4)；As shown in Figure 3 b, of black and white lcd screen
Pixel is made up of 3 sub-pixels (4), and resolution brings up to 3 times in y-direction.Alternating floor between lcd screen (1) and raster (2)
Glass, different LED lamp groups (10) irradiate under, the image being projected in raster (2) has certain dislocation, be equivalent to
Hardware interpolation method lifts image resolution ratio, staggers half-pixel in x direction, inserts a pixel and improve exposure between two pixels
Resolution, can mitigate, with the vestige of smooth pixel grid, the reticulate pattern occurring after being combined with 3 D grating.
Raster (2) adopts slit grating, mount on the good optical glass matrix of transparency, thickness of glass 1.5～
4mm, slit grating is located at separation glass layer between the one side just to sensitive material (3) for the glass, and lcd screen (1).Slit grating with
Gap between sensitive material is the smaller the better, but must can relative movement.As shown in fig. 7, slit grating by light transmission strip (16) and
Shading strip (17) forms, about 5～20 microns of light transmission strip (16) width, and the thinner precision of images is higher, and corresponding time of exposure is longer.For
The pitch identical meeting raster with 3 D grating requires, and slit grating should be produced according to the pitch of different 3 D gratings
One-to-one specification, in the present invention, raster (2) and lcd screen (1) do not have strict position corresponding relation it is not necessary to closely
Contact is installed, and changes very convenient.Because lcd screen image has network, although misalignment of pixels exposure can eliminate
, is still easily there is allowing the uncomfortable reticulate pattern of people with 3 D grating compound tense, raster in the present invention in Partial Mesh
Grid line design becomes and y direction cant angle theta angle, to eliminate reticulate pattern, to be combined into 3 D grating also identical to be tilted during stereo
Angle.
Scanning shift mechanism is by bearing (12), slide block (13), slide rail (14), turntable driving module (15), mobile support
(18) form.Mobile support (18) is fixed on slide block (13), under the driving of turntable driving module (15), slide block (13) along
Slide rail (14) moves in x direction, and slide rail (14) is fixed on bearing (12), as shown in Figure 6.The displacement of turntable driving module (15)
Drive to be rotated by step motor control micrometer and realize, and measure displacement in real time with length gauge and feed back to motor, displacement
Precision is up to 1 micron.Mobile support (18) can carry raster (2) and be scanned displacement exposure, now lcd screen (1) with
As overall move together better；Mobile support (18) can also carry sensitive material fixed platform, and dependence deadweight will
Sensitive material (3) is pressed together in raster (2), and turntable driving module (15) promotes sensitive material fixed platform single in x direction
To moving a certain distance, after eliminating spacious amount and flattening sensitive material (3), start scanning shift exposure, now raster (2) with
Lcd screen (1) maintains static.Both scanning shift modes are equivalent, for convenience, below all with raster mobile retouching
State.
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, scanning
The pitch of grating is p, and total displacement is d, x directional resolution vx=25.4/d, d=m*d=p/cos θ, m width parallax sequence
Image is divided into the exposure that m step scanning completes whole stereo.When step-length is 5 microns, vx=5080dpi, reach so
High resolution, it is necessary to assure the width reaching the scan line of threshold exposure through raster is less than 2 times of step-length.
When tilt angle theta ≠ 0, in the scan line of x direction movement, there is also motion scan component in y direction, can not only
Output and lcd screen, with the vertical scroll of painting or calligraphy stereo of size, also can export banner stereo.As shown in Figure 7a, raster tilts
At 15 °～45 °, in x direction, lcd screen shows vertical scroll of painting or calligraphy image to the parallax of parallax sequence image to the scope of angle, θ, and 25 ° of θ ≈ is preferred；
As shown in Figure 7b, at 45 °～75 °, the parallax of parallax sequence image is in y direction, lcd screen for the scope of raster tilt angle theta
Display banner image, 65 ° of θ ≈ is preferred, and parallax sequence image needs to offset, in x direction, Jiao bringing with compensated scanning displacement in advance
Point vertical dislocation.When the pitch of raster be projection image source pixel away from 1 or 2 times when, the grid line of raster can
With consistent with y direction, 3 D grating is straight burr grating.
Computer (9) is controlled to complete four functions: parallax sequence Image semantic classification, display, exposure, raster moves.Point
Four kinds of situations are processed respectively.
1. image source adopts black and white lcd screen.
Each pixel of lcd screen is become by 3 sub-pixel groups, and the width of sub-pixel is the former of 1/3, the lcd screen of pixel wide
Resolution estranged is py*px, all it is assumed to be 1600*1200 below to illustrate, the resolution of display gray level image can reach (1600*
3) * 1200, y direction has had sufficiently high definition and has been no longer necessary to interpolation.Make light source with two LED lamp groups of l2 and l5 to expose
Light, the image that it is projected in raster has the dislocation of half-pixel in x direction, and interpolated resolution reaches (1600*3) *
(1200*2), it is limited to the aperture opening ratio of pixel, the interpolated resolution improving x direction further has little significance, but x direction is arranged
The LED lamp of row is increased to multigroup by two groups, can improve the network of image further.
Non- for the parallax sequence image of rgb form grade is become (1600*3) * (1200*2) than interpolation processing, will be anti-phase for color,
Extract pixel in the interlacing of x direction and be reassembled into two width rgb images, be respectively labeled as t1 and t2, resolution is (1600*3) *
1200, t1 and t2 is resolved into 6 gray level images by rgb Color Channel, is respectively labeled as g1 (r), g1 (g), g1 (b) and g2
R (), g2 (g), g2 (b), resolution is (1600*3) * 1200, can point-to-point display on black and white lcd screen.One width parallax sequence
The exposure process of row 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 exposure of l5 blue lamp；
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 exposure of l2 blue lamp；
Raster moves step-length d, and a width parallax sequence exposure map finishes.The complete exposure cycle bag of stereo
Include the exposure process of whole m parallax sequence images.
2. image source is using colored lcd screen.
Colored lcd screen possesses rgb filter layer, manages imaging using addition chromogen, and uses subtraction color when exposing, that is, feels
In luminescent material, same position has to pass through rgb trichroism optical superposition exposure, could show correct color, therefore at least need
L1, l2, l3 lamp group arranges in y direction, and 3 adjacent sub- pixel projection to same point are exposed.In order to realize interpolation in x direction
Expose in addition it is also necessary to be further added by l4, l5, l6 lamp group, as shown in figure 4, its spacing is directly proportional to the light path of light source to lcd screen, with lcd
The spacing shielding raster is inversely proportional to it is desirable to two adjacent groups lamp staggers half-pixel in x direction projection, wrong in y direction projection
Open 1 sub-pixel.
Non- for the parallax sequence image of rgb form grade is become (1600*3) * (1200*2) than interpolation processing, in the interlacing of x direction
Extract pixel and be reassembled into two width rgb images, be respectively labeled as t1 and t2, resolution is (1600*3) * 1200.T1 is decomposed
Become 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 colored lcd screen, concrete isolation and rgb sub-pixel
Put in order relevant, only need to ensure same three color component energy overlapping exposures of pixel.One width parallax sequence image
Exposure process is as follows:
Lcd screen display image g1 (1), opens l1 group r, g, the exposure of b lamp；
Lcd screen display image g1 (2), opens l2 group r, g, the exposure of b lamp；
Lcd screen display image g1 (3), opens l3 group r, g, the exposure of b lamp；
Lcd screen display image g2 (4), opens l4 group r, g, the exposure of b lamp；
Lcd screen display image g2 (5), opens l5 group r, g, the exposure of b lamp；
Lcd screen display image g2 (6), opens l6 group r, g, the exposure of b lamp；
Raster moves step-length d, and a width parallax sequence exposure map finishes.The complete exposure cycle bag of stereo
Include the exposure process of whole m parallax sequence images.In one group of lamp, the time of exposure of r, g, b lamp can individually set.
3. dislocation-free interpolation exposure.
In most cases the primary resolution of lcd screen is enough clearly it is not necessary to dislocation interpolation exposes and to improve clearly
Parallax sequence image of rgb form etc. is directly become 1600*1200 to be exposed than interpolation processing by degree.For black and white lcd screen,
Resolve into 3 gray level images by rgb Color Channel, be respectively labeled as g (r), g (g), g (b), resolution is 1600*1200, exposes
Light time adopts l2 lamp group one, can mitigate reticulate pattern using two groups of lamps of l2, l5.The exposure process of one width parallax sequence image
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 exposure of l2, l5 blue lamp；
Raster moves step-length d, and a width parallax sequence exposure map finishes.
For colored lcd screen, directly parallax sequence image is shown, exposed with l1, l2, l3 lamp group simultaneously, also may be used
So that mitigation reticulate pattern is exposed using l1, l2, l3, l4, l5, l6 lamp group simultaneously.In order to obtain suitable light exposure, r in one group of lamp, g,
The time of exposure of b lamp needs individually to set.
4. when making image source using significantly lcd screen, and the pitch of 3 D grating is less, pixel away from during more than pitch,
The definition of parallax sequence image also cannot be guaranteed even across dislocation interpolation, and solution is the grid raster (2)
Away from being arranged to 2 times of 3 D grating, parallax sequence image resolves into two width by odd number, even column, forms two groups of 2m width altogether new
Parallax sequence image, first scan exposure odd column group parallax sequence figure, then expose even column group parallax sequence figure.
Brief description:
Fig. 1 is exposing unit structural representation.
Fig. 2 is lcd screen, raster and sensitive material position relationship schematic diagram.
Fig. 3 a is colored lcd screen image element structural representation, and Fig. 3 b is black and white lcd screen image element structural representation.
Fig. 4 is exposure light source schematic diagram.
Fig. 5 is two groups of lamp exposure image misalignment of pixels interpolation schematic diagrams.
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 screen, 2 raster, 3 sensitive materials, the sub-pixel of 4lcd screen, 5 sensitive material fixed platforms and scanning shift
Mechanism, 6 exposure light sources, 7 illuminators, 8 incident raies, 9 control computers, 10led lamp group, 11 radiating bottom plates, 12 bearings, 13 is sliding
Block, 14 slide rails, 15 turntable driving modules, 16 light transmission strips, 17 shading strips, 18 mobile supports.
Grating scanning type solid photo print apparatus disclosed by the invention, with plane outut device phases such as laser enlargement of color photos, description air brushing
Than, its lateral resolution improves more than 10 times, and the stereo of exposure output has the advantages that high precision, third dimension are strong, its
Definition matches in excellence or beauty high-precision plane picture completely, watches comfortable nothing and feels dizzy sense, can be widely applied to photograph and advertising sector.
Specific embodiment:
Case study on implementation one, sets up the exposing unit of grating scanning type solid photo print apparatus with black and white lcd screen.
Exposing unit by controlling computer (9), the exposure light source (6) that two LED lamp groups of l2, l5 are constituted, black and white lcd screen (1),
Raster (2), sensitive material fixed platform and scanning shift mechanism (5) are constituted.Light source is to the light path about 2m of lcd screen, middle
Using two blocks of mirror reflection light, the glass basis thickness 2mm of raster, computer (9) is controlled accurately to control by relay
In exposure light source (6) processed, the time of exposure of each LED lamp group (10), can be accurate to 1 millisecond, and scanning shift mechanism (5) drives sense
In x scanning direction displacement, up to 1 micron, the primary resolution of lcd screen is 1920*1200 to precision to luminescent material fixed platform, display
The definition of black white image is up to (1920*3) * 1200.Non- for every width parallax sequence image grade is become (1920*3) * than interpolation processing
(1200*2), that color is anti-phase, then resolve into the gray level image that 6 resolution are (1920*3) * 1200, be sequentially displayed in black
Expose on white lcd screen, after a width parallax sequence exposure map finishes, sensitive material (3) moves step-length d, carries out next width and regards
The exposure process of difference sequence image.After all of parallax sequence image exposure finishes, sensitive material (3) enters rinse-system and shows
Shadow, fixing, drying, are compounded to form stereo with 3 D grating.Prepare 4 sets of scanning light for an exposing unit is at least supporting
Grid:
1. raster pitch 0.3618mm, θ=25 °, d=0.3992mm, d=0.3992/m, m are parallax sequence figure number
Amount, for exposing 70 line vertical scroll of painting or calligraphy 3 D grating photos.
2. raster pitch 0.3618mm, θ=65 °, d=0.8561mm, d=0.8561/m, m are parallax sequence figure number
Amount, for exposing 70 line banner 3 D grating photos.
3. raster pitch 0.635mm, θ=25 °, d=0.7006mm, d=0.7006/m, m are parallax sequence figure number
Amount, for exposing 40 line vertical scroll of painting or calligraphy 3 D grating photos.
4. raster pitch 0.635mm, θ=65 °, d=1.5025mm, d=1.5025/m, m are parallax sequence figure number
Amount, for exposing 40 line banner 3 D grating photos.
Case study on implementation two, sets up grating scanning type solid photo print apparatus exposing unit with colored lcd screen.
Exposing unit by controlling computer (9), the exposure light source (6) that six LED lamp groups of l1, l2, l3, l4, l5, l6 are constituted,
Colored lcd screen (1), raster (2), sensitive material fixed platform and scanning shift mechanism (5) are constituted.Light source is to lcd screen
Light path about 2m, centre adopts two blocks of mirror reflection light, the glass basis thickness 2mm of raster, controls computer (9) to pass through
In relay precise control exposure light source (6), the time of exposure of each LED lamp group (10), can be accurate to 1 millisecond, scanning shift machine
Structure (5) drives sensitive material fixed platform in x scanning direction displacement, and up to 1 micron, the primary resolution of lcd screen is precision
1920*1200.Every width parallax sequence image etc. is become 1920*1200 than interpolation processing, color is anti-phase, then straight with 6 lamp groups
Connect exposure parallax sequence image, sensitive material (3) moves step-length d, carries out the exposure of next width parallax sequence image.All
Parallax sequence image exposure finish after, sensitive material (3) enter rinse-system development, fixing, dry, be combined with 3 D grating
Form stereo.As case study on implementation one, it is that exposing unit at least prepares 4 sets of 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.Stereo
Complete exposure cycle is as follows:
Sensitive material is located at initial point, exposes parallax sequence image t0；
Mobile 5.7 microns of sensitive material, exposes parallax sequence image t1；
Mobile 5.7 microns of sensitive material, exposes parallax sequence image t2；
Mobile 5.7 microns of sensitive material, exposes parallax sequence image t3；
…………
Mobile 5.7 microns of sensitive material, exposes parallax sequence image t68；
Mobile 5.7 microns of sensitive material, exposes parallax sequence image t69.
Exposure finishes, and removes sensitive material, and sensitive material fixed platform returns to origin position.The shift precision of raster
It is 1 micron, displacement round, and deviation accumulation is entered next step.
Claims (9)
1. a kind of grating scanning type solid photo print apparatus, be made up of exposing unit, rinse-system it is characterised in that exposing unit by
Control computer, exposure light source, lcd screen, raster, sensitive material fixed platform and scanning shift mechanism to constitute, control computer
Parallax sequence image is shown on lcd screen, image is projected on sensitive material through raster by exposure light source, controls electricity
The time that nicergoline crosses each LED lamp group relay precise control exposure light source Nei is exposed, micrometric displacement raster after exposure
Or sensitive material, change next parallax sequence image and be exposed, improve the resolution of output image by multiexposure, multiple exposure；
Raster adopts slit grating, and matrix is the good optical glass of transparency, and slit grating is located at glass just to photosensitive material
The one side of material, separation glass layer and lcd screen between, raster and sensitive material are closely packed together, and can micro-shifting move each other,
Exposure light source is made up of least one set LED lamp, comprises at least one red, green, a blue LED lamp in LED lamp group,
Closely combine together, every color LED lamp all can individually control time of exposure, has at regular intervals, in difference between each group LED lamp
Under LED lamp group is irradiated, the image mutual dislocation that lcd screen projects in raster forms interpolation relation.
2. solid photo print apparatus as claimed in claim 1, are further characterized in that, it is py*px's that image source adopts primary resolution
Black and white lcd screen, exposure light source is made up of two LED lamp groups, and the image being projected in raster staggers half picture in x direction
Element, by non-for the parallax sequence image of rgb form grade than interpolation processing become (py*3) * (px*2), will be anti-phase for color, x direction every
Row extracts pixel and is reassembled into two width rgb images, is respectively labeled as t1 and t2, t1 is resolved into 3 ashes by rgb Color Channel
Degree image, resolution is (py*3) * px, is exposed respectively with the red, green, blue LED lamp of a LED lamp group, t2 is led to by rgb color
Road resolves into 3 gray level images, is exposed respectively with the red, green, blue LED lamp of another LED lamp group；Wherein, y represents level side
To x represents vertical direction；Py represents Horizontal number of pixels, and px represents Vertical number of pixels.
3. solid photo print apparatus as claimed in claim 1, are further characterized in that, image source using colored lcd screen, exposure light source by
6 LED lamp groups are constituted, and two adjacent groups lamp projects to image in raster and staggers half-pixel in x direction, wrong in y direction
Open 1 sub-pixel, non-for the parallax sequence image of rgb form grade is become (py*3) * (px*2) than interpolation processing, will be anti-phase for color,
Extract pixel in the interlacing of x direction and be reassembled into two width rgb images, be respectively labeled as t1 and t2, t1 is resolved into 3 width rgb figures
Picture, is labeled as g1 (1), g1 (2), g1 (3), and t2 is resolved into 3 width rgb images, is labeled as g2 (4), g2 (5), g2 (6), each
Exploded view is exposed as a corresponding LED lamp group, after a width parallax sequence exposure map finishes, raster or sensitive material
Mobile step-length d, carries out next width parallax sequence image exposure, complete exposure cycle includes whole m parallax sequence figures
The exposure process of picture；Wherein, y represents horizontal direction, and x represents vertical direction；Py represents Horizontal number of pixels, and px represents vertical pixel
Number.
4. solid photo print apparatus as claimed in claim 1, are further characterized in that, the ratio such as parallax sequence image of rgb form is inserted
Value is processed into py*px, for black and white lcd screen, resolves into 3 gray level images by rgb Color Channel, is carried out using 1 or 2 lamp group
Parallax sequence image for colored lcd screen, is directly shown, is exposed using 3 or 6 lamp groups by exposure；Wherein, y represents water
Square to x represents vertical direction；Py represents Horizontal number of pixels, and px represents Vertical number of pixels.
5. the three-dimensional photo print apparatus as described in claim 2,3 or 4, are further characterized in that, the grid line design of raster is become and y
Direction cant angle theta angle, to eliminate the reticulate pattern producing with 3 D grating compound tense, after often completing a parallax sequence image exposure,
Step-length d is moved in x direction micro-shifting by scanning shift mechanism, and the pitch of raster is p, and total displacement is d, d=m*d=p/
Cos θ, m are the quantity of parallax sequence image, suitably choose the value of m it is ensured that reach the scan line of threshold exposure through raster
Width be less than 2 times of step-length, be divided into m step micro-shifting and move the exposure completing whole stereo.
6. solid photo print apparatus as claimed in claim 5, are further characterized in that, the scope of raster tilt angle theta 15 °～
45 °, in x direction, lcd screen shows vertical scroll of painting or calligraphy image, exposure output vertical scroll of painting or calligraphy stereo to the parallax of parallax sequence image.
7. solid photo print apparatus as claimed in claim 5, are further characterized in that, the scope of raster tilt angle theta 45 °～
75 °, in y direction, lcd screen shows banner image, exposure output banner stereo to the parallax of parallax sequence image.
8. solid photo print apparatus as claimed in claim 1, are further characterized in that, the pitch of raster is the image source picture of projection
Vegetarian refreshments away from 1 or 2 times, the angle of inclination in the grid line of raster and y direction is 0 °, and 3 D grating is straight burr grating；Wherein, y
Represent horizontal direction.
9. solid photo print apparatus as claimed in claim 5, are further characterized in that, mobile support is fixed on slide block, drives in scanning
Under the driving of dynamic model block, slide block moves along slide rail in x direction, and slide rail is fixed on bearing, and the displacement of turntable driving module is driven
Move to be rotated by step motor control micrometer and realize, and measure displacement in real time with length gauge and feed back to motor, displacement essence
Up to 1 micron, mobile support can drive raster displacement exposure it is also possible to drive sensitive material displacement exposure to degree；Wherein,
X represents vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310226047.5A CN104238256B (en) | 2013-06-08 | 2013-06-08 | Raster scanning type three-dimensional printing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310226047.5A CN104238256B (en) | 2013-06-08 | 2013-06-08 | Raster scanning type three-dimensional printing machine |
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| Publication Number | Publication Date |
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| CN104238256A CN104238256A (en) | 2014-12-24 |
| CN104238256B true CN104238256B (en) | 2017-01-25 |
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| CN201310226047.5A Expired - Fee Related CN104238256B (en) | 2013-06-08 | 2013-06-08 | Raster scanning type three-dimensional printing machine |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106033169A (en) * | 2015-03-16 | 2016-10-19 | 北京康得新三维科技有限责任公司 | Photosensitive film-coating raster three-dimensional exposure machine |
| CN116699633A (en) * | 2016-11-10 | 2023-09-05 | 莱卡地球系统公开股份有限公司 | Laser scanner |
| CN109946917B (en) * | 2019-04-04 | 2022-07-19 | 忆备缩微科技(北京)有限公司 | Method for imaging super-high pixel color image on microfilm |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101464623A (en) * | 2008-12-17 | 2009-06-24 | 顾金昌 | Automatic flow and synthesizing method for digital stereo enlarging print optical grating and sensitive material |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0822081A (en) * | 1994-07-08 | 1996-01-23 | Fuji Photo Film Co Ltd | Photographic printer and film scanner |
| CN1130599C (en) * | 1996-12-23 | 2003-12-10 | 新系统有限公司 | System for the transfer of digitized images to an image support or vice-versa |
| CN1595287A (en) * | 2003-09-11 | 2005-03-16 | 李开生 | A photographic printing method for color photos |
| TWI264610B (en) * | 2005-02-15 | 2006-10-21 | Benq Corp | Recording system for light-sensitive sheet |
| CN102540687B (en) * | 2010-12-15 | 2016-09-07 | 北京康得新三维科技有限责任公司 | Stereoscopic digital printer |
| CN102096300A (en) * | 2011-01-30 | 2011-06-15 | 顾金昌 | Laser exposure system for enlarging print of digital stereo image and method of laser exposure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101464623A (en) * | 2008-12-17 | 2009-06-24 | 顾金昌 | Automatic flow and synthesizing method for digital stereo enlarging print optical grating and sensitive material |
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