CN101241204B - Cylinder type hologram manufacture method, manufacture device and manufactured hologram - Google Patents
Cylinder type hologram manufacture method, manufacture device and manufactured hologram Download PDFInfo
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- CN101241204B CN101241204B CN2007100733040A CN200710073304A CN101241204B CN 101241204 B CN101241204 B CN 101241204B CN 2007100733040 A CN2007100733040 A CN 2007100733040A CN 200710073304 A CN200710073304 A CN 200710073304A CN 101241204 B CN101241204 B CN 101241204B
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Abstract
The invention discloses a making method for a cylindrical hologram, a making device and a made hologram thereby. The making method comprises following steps: encoding each line information after dividing a plurality of digital images with different visual angles into a plurality of line information; reading the encoded line information by a projection system, condensing the read line information by laser permeating the projection system at a corresponding point of the holographic recording material; recording each line information of each gram spot by spot until a unit hologram is recorded; recording each unit hologram row by row until unit holograms of all view angles are all recorded on the corresponding holographic recording material. The invented method divides and encodes an image into a plurality of line information, records the line information spot by spot on the holographic recording material disposed on the focus of the imaging lens, and the line information is packed recorded by an imaging lens, so that the radius of the final cylindrical hologram is adjusted by adjusting the object distance.
Description
Technical field
The present invention relates to the holographic technique field, in particular, relate to a kind of method for making, producing device of drum type brake hologram and the hologram that makes.
Background technology
Holograph has been that people are rely and supported the ideal tools that 3 D stereo shows dream since invention always.The breakthrough of recording materials, the birth of digital hologram, the appearance of all kinds of cheap price and excellent quality LASER Light Source is indicating that dream and effort that the nearly half a lifetime of people is recorded become a reality fast.Display holography just progressively enters people's daily life from the palace of science and art, is challenging the basic understanding of people to the existing information technology to greatest extent.Following object that infotech faced is not only common two dimensional surface information processing, but to the information acquisition on whole three dimensions and even the space-time meaning, coding, transmission, demodulation and demonstration.
The drum type brake hologram is a kind of hologram that is recorded on the hologram recording material cylindraceous, and in other words, when having only hologram recording material to be bent to form the arc of a predetermined radii or cylinder, the graphical information of its surface recording could become a space image clearly.Slewing circle cartridge type hologram can be observed the picture that object reproduces from each different angles, reaches the effect of panorama.American Lloyd Cross has proposed the method for making of drum type brake 360 degree visual angle white light reconstruction combination holograms.
Drum type brake hologram with 360 degree visual angles is an example, the information acquisition process of drum type brake hologram as shown in Figure 1,360 degree directions by 3 pairs of subjects 1 of video camera are taken N view, the subtense angle of its adjacent two views is the 360/N degree, N is big more, the continuity of then final hologram image when rotary viewing is just good more, and in order to guarantee hologram continuity preferably, the number of view generally is no less than 360 width of cloth.In shooting process, subject 1 can be placed in the center of a rotatable platform 2, video camera 3 focuses on the center of rotation platform 2 and takes.
The recording beam path of traditional 360 degree cylinder holograms is as shown in Figure 2: laser sends the back and arrives optical projection system 4 from laser instrument, optical projection system 4 is made up of illuminating lens 41, the two-dimentional egative film 42 that has write down subject information and projecting lens 43, illuminating lens 41 shines laser on the two-dimentional egative film 42 uniformly, by projecting lens 43, make egative film 42 imagings.Cylindrical lens 61 and field lens 62 (for spherical lens) are stacked together, be arranged on egative film 42 by the image space place behind the projecting lens 43, because cylindrical lens 61 does not have curved transition in the YZ plane, thereby, after laser passes through cylindrical lens 61 and field lens 62, focal length in its XZ plane is less than the focal length in the YZ plane, and the focal position of image position in the XZ plane that egative film 42 is become in the YZ plane, they are compressed into one with imaging, behind the slit S by hologram recording material 7 fronts, the unit hologram record is being positioned on cylindrical lens 61 and field lens 62 hologram recording material 7 (the holographic film of making as silver salt) at the focus place of directions X, thereby is making each Zhang Erwei egative film form the unit hologram of a narrow strip at the slit S place of hologram recording material 7.Reference light R in the YZ plane, by top or bottom oblique fire to hologram recording material 7.
Change the two-dimentional egative film 42 of different visual angles successively, and move hologram recording material 7 along directions X, by the unit hologram exposure, all unit holograms of taking the photograph up to Fig. 1 all are recorded on the hologram recording material 7 successively.Position relation between the unit hologram is to concern that according to the visual angle between each two-dimentional egative film 42 like this, in hologram reconstruction, the holographic three-dimensional picture of formation is just consistent with subject and fixed.
Fig. 3 shows the reproduction process of 360 degree visual angle drum type brake holograms: hologram is curved cylinder type, and its radius r equals the distance of field lens 62 and slit S in the manufacturing process.With white point light source 51 illumination holograms, position of reference light source when writing down, the position of pointolite 51 is identical.Then human eye 5 is seen the holographic images of its corresponding views by the unit hologram of each view, thereby by this cylinder hologram, just can see the holographic three-dimensional picture that one 360 degree visual angles are arranged in cylinder.
The predetermined cylinder radius r of this drum type brake hologram equals the distance of hologram recording material 7 to cylindrical lens 61, and hologram recording material 7 is positioned at the focus place of the directions X of cylindrical lens 61 and field lens 62, this distance is subjected to the common restriction of the focal length of cylindrical lens 61 and field lens 62, want to change the cylinder radius r, the radius-of-curvature that just must change cylindrical lens 61 just can realize.Thereby, for the fixing cover register system of radius-of-curvature, can only produce cylinder hologram with a kind of radius, that is to say, with respect to the cylinder of different radii, just need a cylindrical lens 61 corresponding with it, limited the range of application of this method to a great extent.In addition, because this recording optically systematic comparison complexity, laser is through after the optical system, the energy dissipation of laser a lot, the laser energy that drops on the hologram recording material reduces; And, what once write down on hologram recording material is a fillet, and laser distributes and relatively disperses, and concentrates inadequately, this just not only requires high to laser power, and only only on the hologram recording material of the high luminous sensitivity of costliness, could realize preferably that as the most ancient and commonly used recording medium---silver salt, its luminous sensitivity is very high, but be difficult to control, the cost height is not easy to produce in batches, and this just causes traditional drum type brake hologram to be difficult to widespread use.On photoresist low luminous sensitivity materials such as (as the photoetching hectograph, its luminous sensitivity are than low two orders of magnitude of silver salt), realize very difficultly, thereby do not see yet that so far the holographic product of similar effect occurs.
Summary of the invention
For overcoming above-mentioned defective, one of technical matters to be solved by this invention provides a kind of method for making of drum type brake hologram, make same set of producing device can not change the drum type brake hologram that wherein lenticular unit can make different radii, and the hologram that makes can well be on low luminous sensitivity material record.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method for making of drum type brake hologram may further comprise the steps:
(a) obtain the digital pictures of several different visual angles;
(b) each width of cloth digital pictures is divided into some every trade information, the line number of row information is corresponding with digital pictures pixel count in vertical direction, and each every trade information is carried out encoding process;
(c) optical projection system reads the capable information after the encoding process, the capable Information Compression that laser will read in after by this optical projection system the correspondence of hologram recording material a bit on;
(d) repeating step (c), optical projection system reads information successively, and from the first capable delegation to the end of piece image, each every trade information is write down in pointwise, till a width of cloth unit hologram record is intact;
(e) repeating step (c) and step (d) are by each width of cloth unit hologram of row record, until all corresponding being recorded on the hologram recording material of the unit at all visual angles hologram.
Comprise also after the described step (e) that one by mold pressing or thermoplastic processes, mass-produces the step of drum type brake hologram with the hologram recording material metallization, wherein, described hologram recording material is a photoresist.Such design makes the drum type brake hologram to produce in batches, greatly reduces the cost of drum type brake hologram.
In the described step (b), it is that triplex row has R respectively that the step of this encoding process also comprises each every trade information color separation, G, the step of the color separation of B three primary colors half-tone information, corresponding, in step (c), when optical projection system reads capable information after the encoding process, triplex row color separation information is carried out spatial disposition according to proportionate relationship a/b=(λ r-λ g)/(the λ g-λ b) of its three primary colors wavelength, wherein, a represents the distance between capable information of red component and the capable information of green component, b represents the distance between capable information of green component and the capable information of blue component, λ r, λ g, λ b represents ruddiness respectively, green glow, the wavelength of blue light, optical projection system are computing machine and by computer-controlled spatial light modulator.Such design makes white light after being radiated at the capable information of three primary colors of arranging with above-mentioned spatial order, and on imaging, color separation information is in the image space mutual superposition, and human eye can be seen the holographic reconstructed image of true color.
Two of technical matters to be solved by this invention provides a kind of producing device that has used the drum type brake hologram of said method, make same set of producing device can not change the drum type brake hologram that wherein lenticular unit can make different radii, and the hologram that makes can well be on low luminous sensitivity material record.
A kind of producing device of drum type brake hologram, comprise: launch laser beam laser instrument, optical splitter, put down in writing optical projection system, the holographic imaging systems of the coded message of the image of taking the photograph, optical splitter is divided into reference light with laser beam and shines the thing light of optical projection system, wherein: described optical projection system is can be to the image display system of image information by the row partition encoding, described holographic imaging systems comprises imaging len and hologram recording material, and the corresponding exposure station on the hologram recording material is positioned at the focus place of imaging len; The thing light that carries optical projection system epigraph information converges to its focus place by imaging len, and is overlapping for a bit with the reference light that shines directly on the hologram recording material, exposes on hologram recording material.
Described optical projection system is computing machine and the spatial light modulator that is connected with computing machine.Spatial light modulator (Spatial Light Modulator, be called for short SLM) digital image can be shown by this device, include the two-dimentional steric image of light distribution by input, after laser radiation, form output light with this two-dimentional light distribution.Use SLM to carry out Projection Display, can carry out digital coding by more convenient logarithmic code image.
Described holographic imaging systems also comprises can drive the hologram recording material mobile platform that the adapted space photomodulator moves on the focal plane of imaging len.Such design can make different image line information in the corresponding position of hologram recording material successively during the pointwise exposure, and the control of the position of the exposure station of hologram recording material is more prone to, accurately.
Described holographic imaging systems also comprises the random scatter screen that is provided with before the spatial light modulator, and laser shines on the spatial light modulator after shielding by random scatter again.Diffuser screen the is level and smooth immediately spectrum curve of spatial light modulator SLM, make laser form a uniform light spots at the focus place of imaging len, recorded hologram herein, avoided the loss of the high-frequency information on the SLM, low frequency and the high-frequency information of hologram on record SLM that can be complete on the limited size, the picture that becomes during reproduction just can not occur as outline line, gradation loss, and the details difficulty such as debates at details difference.
Described holographic imaging systems also comprises before the hologram recording material places a size and the square diaphragm that hologram recording material adapts in the overlapping center of the hot spot of thing light and reference light, makes that per two adjacent exposure stations do not overlap mutually on the hologram recording material.Such design makes can better the pixelation recorded hologram, can not interfere with each other between the capable information of the image of each width of cloth different visual angles, and human eye passes through this holography pixel, just can see the true color restore information of corresponding line in its corresponding views.
Three of technical matters to be solved by this invention provides a kind of hologram that has used said method to make.
A kind of drum type brake hologram that uses said method to make, it is characterized in that: the horizontal of described drum type brake hologram is made up of the measuring point that is no less than, the number of measuring point is corresponding with the visual angle number of the stereo-picture of reproduction, with the measuring point of the delegation capable information corresponding to the different same physical locations of picture; Vertically being made up of the measuring point that is no less than of drum type brake hologram, the number of measuring point is corresponding with digital pictures pixel count in vertical direction, and the measuring point of same row is corresponding to the capable accordingly information of same width of cloth picture.This drum type brake hologram curves a predetermined arc, and under the irradiation of light, can reconstruction of hologram stereo-picture.
Each measuring point all is square on the described drum type brake hologram.Square measuring point is because during exposure on the motherboard that hologram recording material forms, placed square diaphragm before the hologram recording material, laser focuses on the hot spot that forms by random scatter screen back have been passed through to form square exposure station behind the square diaphragm, can make exposure station marshalling on hologram recording material like this, per two adjacent measuring point points do not overlap mutually, and utilize hologram recording material as far as possible fully.
The present invention is owing to cut apart piece image, after encoding process becomes some every trade information, the pointwise of every every trade information correspondence is recorded on the hologram recording material at the focus place that is positioned at imaging len, row information is only carried out packed record by an imaging len, can be by instrumentality apart from reaching the adjusting image distance, and the holographic radius of graph of the drum type brake that makes equals the distance between the picture that hologram recording material and imaging len become, be the poor of the image distance of imaging lens and focal length, thereby, can be by instrumentality apart from reaching the effect of regulating the holographic radius of graph of final cylinder, same set of producing device can be changed the drum type brake hologram that wherein lenticular unit makes different radii.In addition, higher because laser once only records the capable information of delegation on any in the intensity of measuring point place laser, even the effect of photoetching is also relatively good on low luminous sensitivity materials such as photoresist, reduced cost, use wider.
Description of drawings
Fig. 1 is the information acquisition synoptic diagram of drum type brake hologram;
Fig. 2 is the recording beam path synoptic diagram of traditional 360 degree visual angle drum type brake holograms;
Fig. 3 is the reproduction synoptic diagram of 360 degree visual angle drum type brake holograms;
Fig. 4 is the imaging synoptic diagram of the fillet unit hologram of the specific embodiment of the invention;
Fig. 5 is the making light path synoptic diagram of specific embodiment of the invention drum type brake hologram;
Fig. 6 is that the three primary colors of the specific embodiment of the invention are coded in the distribution schematic diagram on the SLM;
Fig. 7 is the actual light path synoptic diagram of specific embodiment of the invention drum type brake hologram;
Fig. 8 is the imaging synoptic diagram of opaque reflection circle cartridge type embossed hologram;
Fig. 9 is the imaging synoptic diagram of transparent reflection circle cartridge type embossed hologram.
Wherein:
1, subject, 2, rotatable platform, 3, video camera, 4, optical projection system, 41 illuminating lenss, 42, egative film, 43, projecting lens, 5, human eye, 51, pointolite, 61, cylindrical lens, 62, field lens, 7, hologram recording material, 8, optical projection system, 81, collimation lens, 82, SLM, 83, the random scatter screen, 84, thing light spatial filter, 85, thing light beam expanding lens, 9, holographic imaging systems, 91, imaging len, 92, hologram recording material, 93, mobile platform, 94, square diaphragm, 11, computing machine, 12, laser instrument, 13, shutter, 14, spectroscope, 15, thing optical plane mirror, 16, the reference light beam expanding lens, 17, the reference light spatial filter, 18, the reference light level crossing.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and preferred embodiment.
The making principle of traditional drum type brake hologram is: (with 360 ° visual angles is example behind the image of collection N width of cloth different visual angles, as shown in Figure 1), with n width of cloth graphic pattern projection to cylindrical lens 61 and field lens 62 places, utilize cylindrical lens 61 that this width of cloth compression pattern is carried out record near the unit hologram that forms a narrow strip hologram, N width of cloth image all is compressed to forms the drum type brake hologram on the hologram recording material 7 successively.Thereby the final drum type brake hologram radius r that forms equals the distance of hologram recording material 7 to cylindrical lens 61, depends on the radius-of-curvature of cylindrical lens 61.Fig. 4 shows in drum type brake hologram reconstruction process, the imaging process of each unit hologram.Pointolite 51 illumination holograms, human eye 5 is seen the holographic images of its corresponding views by the unit hologram of each view, thereby by this cylinder hologram, just can see the holographic three-dimensional picture that has one 360 degree to watch at the cylinder center place.
Analyze by imaging law each unit hologram of former drum type brake hologram, can obtain following two facts: 1, be the fillet hologram of W=2 π r/N by cell width, the information that human eye 5 is seen be by the captured object n of Fig. 1 mode (n=1,2....N) individual view is a r place projection image at the distance hologram; 2, the elevation information of the elevation information of projection image and unit hologram is one to one, that is: the information of projection image on a certain height all is recorded on the respective heights in the unit hologram, does not have vertical parallax on the hologram.It is capable that n view is split as M, the unit hologram of the capable view of m of its correspondence is Hnm, m=1,2....M, each row is carried out independent operation, and the recording beam path (as shown in Figure 5) of the space encoding Onm that its m is capable (as shown in Figure 6) by the drum type brake hologram image in O ｀ nm, and at the focus recorded hologram Hnm of imaging optical path.After then piece image record is finished, when the hologram image to record reduces, be the same with effect on the unit hologram that once piece image is recorded in a narrow strip.This compresses image after just can earlier image segmentation being some every trade information line by line.
Fig. 6, Fig. 7 have illustrated the actual light path arrangement of drum type brake hologram mold pressing motherboard.The formation of hologram device comprises: the laser instrument 12 of launching laser beam, shutter 13, comprises imaging len 91 and is placed on the holographic imaging systems 9 of the hologram recording material 92 (selecting the photoetching hectograph in the enforcement for use) on the mobile platform 93 optical splitter 14, thing optical plane mirror 15, reference light beam expanding lens 16, reference light spatial filter 17, reference light level crossing 18, optical projection system 8.Optical projection system 8 comprises: collimation lens 81, be connected to computing machine 11 record spatial light modulator 82, thing light spatial filter 84 and the thing light beam expanding lens 85 of coded message of the image of taking the photograph.
The laser beam LB that laser instrument 12 sends shines optical splitter 14 behind the shutter 13 via computing machine 11 controls, is divided into thing light and reference light.Thing light expands bundle through thing light beam expanding lens 85 again through 15 reflections of thing optical plane mirror, shines on the collimation lens 81 collimation back lighting spatial light modulator 82 after 84 filtering of thing light spatial filter; Information on the SLM82 is the space encoding Onm of the capable information of m in n the view shown in Figure 6; Luminous energy is evenly distributed in each pixel hologram in order to make, and adds random scatter screen 83 in the SLM82 front; The thing light that comes out from spatial light modulator SLM82 carries the capable information Onm by the image behind the row partition encoding, image in O ｀ nm and form an even speck at imaging len focus place through imaging len 91, with the hologram record of formation on hologram recording material 92.Reference light expands bundle by 18 reflections of reference light level crossing through reference light beam expanding lens 16, shines on the hologram recording material 92 with thing light is overlapping after 17 filtering of reference light spatial filter.The angle of playback light and the transversal circle in drum surface center was identical when thing light reproduced together with the angle theta of reference light.The hologram recording material 92 preceding big or small square diaphragms 94 that adapt with hologram recording material 92 that are placed with in the overlapping center of the hot spot of thing light and reference light, can allow exposure station squarely on the hologram recording material 92, per two adjacent exposure stations can not interfere with each other.Be stabilized as the photoresist sheet of hologram recording material 92 and be placed on the XY direction mobile platform 93 by computing machine 11 controls, the XY plane promptly is the focal plane of imaging len 91.
Change the capable information of each width of cloth image on the SLM82 successively, drive the photoetching hectograph by mobile platform 93 and move, the capable information that can make different images is formed the unit hologram of narrow strip one by one in the pointwise exposure successively of the corresponding position of photoetching hectograph.Marshalling between exposure station and the exposure station, all row information of each width of cloth view all are recorded in the corresponding row that vertically distribute of hologram recording material, and the unit hologram of the narrow strip that the N width of cloth view after the compression forms is arranged in parallel.On the hologram that forms, the number of horizontal measuring point is corresponding with the visual angle number of the stereo-picture of reproduction, with the measuring point of the delegation capable information corresponding to the different same physical locations of picture; The number of measuring point is corresponding with digital pictures pixel count in vertical direction longitudinally, and the measuring point of same row is corresponding to the capable accordingly information of same width of cloth picture.
Because the radius r of drum type brake hologram equals the distance between the O ｀ nm of looking like of 91 one-tenths of hologram Hnm on the hologram recording material 92 and imaging lens, promptly the image distance V of imaging lens 91 and focal length F's is poor.Object-image relation according to lens imaging: (1/U)+(1/V)=1/F, U be the object distance----Onm on the SLM82 and the distance of imaging len 91 wherein, the picture O ｀ nm of the V----one-tenth that is image distance and the distance of imaging len 91, F is the focal length of imaging len 91.Can draw, the radius r of drum type brake hologram can be adjusted arbitrarily according to the object-image relation of imaging len 91.That is: when the cylinder radius that needs when us was big, we can be by dwindling realization with the distance between imaging len 91 and the SLM82, otherwise, when we need the radius of cylinder big, then can be by the distance between imaging len 91 and the SLM is zoomed out realization.Like this, the hologram of a cover system different cylinder radiuses that just can make by the position relation of regulating between each element.
If the capable information of image is carried out corresponding color separation encoding process, then can on hologram, reproduce the holographic images of true color.
The m every trade information Onm of n view is pressed R, G, the color separation of B three primary colors is Onmr---red component half-tone information, Onmg---green component half-tone information, three capable information of having only half-tone information of the blue component half-tone information of Onmb, and in the ratio of the three primary colors wavelength of its red light wavelength λ r, green wavelength λ g, blue light wavelength λ b in the enterprising row space arrangement of SLM.As shown in Figure 6, a is the spatial separation between the capable information of red component half-tone information and green component half-tone information, b is the spatial separation between the capable information of green component half-tone information and blue component half-tone information, then according to the ratio of a/b=(λ r-λ g)/(λ g-λ b) three every trade information is carried out spatial disposition.
When white light reconstruction, because R, G, B three primary colors color separation Onmr, Onmg, Onmb, satisfy a/b=(λ r-λ g)/(λ g-λ b) in the arrangement in space, then trichromatic spectra overlapping, three primary colors color separation information will be overlapping in imaging place, will see when human eye 5 is watched Hnm with color separation before the same true color picture.
The making step of drum type brake hologram is as follows:
1). gather N view in the target view scope, obtain the digital pictures of several different visual angles.In the gatherer process, target can have action to change, and also can be any virtual scene that three-dimensional movingization software is generated.The angular field of view of gathering is selected as required, as 180 °, 270 °, or 360 ° panorama visual angle.The size of N has determined the continuity of final hologram image, is generally 360 integral multiple, as: 720,1080 etc.Wherein the unit hologram width of certain view is: W=2 π r/N.
2) it is capable N view to be split as M respectively, and the size of M depends on the resolution characteristic of final holographic images on the blind direction of hanging down, and is suitable with each plan view pixel count in vertical direction generally speaking.Can be by image being carried out three primary colors color separation coding to obtain to have the hologram of true color information.An above M*N image is carried out the three primary colors color separation and each image is carried out spatial disposition to obtain the space encoding Onm of n the capable information of view m by proportionate relationship a/b=(λ r-λ g)/(λ g-λ b) (as shown in Figure 6) of its three primary colors wavelength.
3) Onm is input on the SLM by computing machine, and its units corresponding hologram Hnm is write down in pointwise.Certainly, image information also can disposablely be input in the storer of SLM, and SLM reads demonstration successively with the capable information of every width of cloth image.
That is: the image that obtains is pressed the visual angle series arrangement, the first every trade information since first width of cloth image, export on SLM when computing machine in the three every trades coding after the three primary colors color separation of this row information, the computer control shutter is opened, penetrate the beam of laser bundle, by the control of mobile platform, with the unit hologram record hologram recording material, be the photoetching hectograph first row the top.Capable information on the SLM is changed to the second every trade information of first width of cloth image, equally, the computer control shutter is opened, penetrate the beam of laser bundle, mobile platform is with the photoetching hectograph Δ H (the height H f/M of the final holographic images of Δ H=) that moves up, with the position of unit hologram record at second row of first row of photoetching hectograph.Capable information of every record, mobile platform Δ H that just the photoetching hectograph moved up all is recorded in first of photoetching hectograph until the M every trade information of first width of cloth image and classifies as and end.
Capable information on the SLM is changed to the first every trade information of second width of cloth image, and mobile platform moves to the top of secondary series with the photoetching hectograph, secondary series and a column pitch be W (W=2 π r/N).Repeat above-mentioned steps, till the M provisional capital of N width of cloth image is recorded on the photoetching hectograph.Like this, the drum type brake hologram is with regard to complete being recorded on the photoetching hectograph.Laterally being made up of the measuring point that is no less than of drum type brake hologram, the number of measuring point is corresponding with the visual angle number of the stereo-picture of reproduction, with the measuring point of the delegation capable information corresponding to the different same physical locations of picture; Vertically being made up of the measuring point that is no less than of drum type brake hologram, the number of measuring point is corresponding with digital pictures pixel count in vertical direction, and the measuring point of same row is corresponding to the capable accordingly information of same width of cloth picture.Owing to be provided with square diaphragm before the photoetching hectograph, thereby each measuring point all is square on the drum type brake hologram, can make exposure station marshalling on hologram recording material like this, per two adjacent measuring point points do not overlap mutually, and utilize hologram recording material as far as possible fully.This drum type brake hologram curves a predetermined arc, and under the irradiation of light, can reconstruction of hologram stereo-picture.
4), thereby thereby can make the cheap batch process of embossed hologram motherboard because the information of photoetching hectograph record is a kind of plane embossment diffraction structure.
With the metallization of photoetching hectograph, electroforming goes out nickel motherboard and working plate, by thermoplastic or UV mould pressing process, just produces required embossed hologram.The photoetching hectograph metallization that will have plane embossment diffraction structure can have a variety of methods, as plating medium zinc sulphide (ZnS) or aluminize (AL) at its surface vacuum, or the photoetching hectograph is carried out surface treatment with the method for Tianjin plating, spraying plating, make the metallization of photoetching hectograph form the embossed hologram motherboard.Utilize the embossed hologram motherboard by thermoplastic or UV mould pressing process, just can produce in batches and produce the digital embossed hologram (as shown in Figure 3) of transmission-type illumination 360 degree visual angle drum type brakes, or the reflective illumination 360 degree visual angle digital embossed holograms of drum type brake are (as Fig. 8, shown in Figure 9, Fig. 8 interior lighting is seen real image, and the virtual image is seen in Fig. 9 exterior lighting).
The cost of manufacture of the drum type brake hologram of this mold pressing is cheap, can be applied to a lot of aspects, as:
1) a kind of new advertising media mode
No matter be transmission-type or reflective, all can be with it as a kind of brand-new advertising media mode widespread use.Little novelties to several cm diameters, nicknack is showed and building decoration to the table top of tens centimetres even several rice diameters greatly, can give the people 360 degree visual angles, true color, the brand-new visual experience of dynamic solid, thereby the revolution that brings advertising.
2) light fixture industry
Image display pattern proposed by the invention is combined with traditional light trade, will bring unlimited reverie to existing light fixture industry.
3) packing industry
At all kinds of drum type brake packings (as drinks, mineral water, pop can etc.), the embossed hologram that the present invention produced is combined with it, will bring the new function of false proof and sales promotion to this class packing.
4) a kind of new holographic anti-counterfeiting mark
This being identified under the plane form can not be distinguished its content, if it is curved a suitable radian, and the just content that can under incandescent lamp, be comprised inside clear the reproduction.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. the method for making of a drum type brake hologram may further comprise the steps:
(a) obtain the digital pictures of several different visual angles;
(b) each width of cloth digital pictures is divided into some every trade information, the line number of row information is corresponding with digital pictures pixel count in vertical direction, and each every trade information is carried out encoding process;
(c) optical projection system reads the capable information after the encoding process, the capable Information Compression that laser will read in after by this optical projection system the correspondence of hologram recording material a bit on;
(d) repeating step (c), optical projection system reads information successively, and from the first capable delegation to the end of piece image, each every trade information is write down in pointwise, till a width of cloth unit hologram record is intact;
(e) repeating step (c) and step (d) are by each width of cloth unit hologram of row record, until all corresponding being recorded on the hologram recording material of the unit at all visual angles hologram.
2. the method for making of a kind of drum type brake hologram as claimed in claim 1, it is characterized in that: comprise also after the described step (e) that one is metallized hologram recording material, by mold pressing or thermoplastic processes, mass-produce the step of drum type brake hologram, wherein, described hologram recording material is a photoresist.
3. the method for making of a kind of drum type brake hologram as claimed in claim 1 or 2, it is characterized in that: in the described step (b), it is that triplex row has R respectively that the step of this encoding process also comprises each every trade information color separation, G, the step of the color separation of B three primary colors half-tone information, corresponding, in step (c), when optical projection system reads capable information after the encoding process, triplex row color separation information is carried out spatial disposition according to proportionate relationship a/b=(λ r-λ g)/(the λ g-λ b) of its three primary colors wavelength, wherein, a represents the distance between capable information of red component and the capable information of green component, b represents the distance between capable information of green component and the capable information of blue component, λ r, λ g, λ b represents ruddiness respectively, green glow, the wavelength of blue light, optical projection system are computing machine and by computer-controlled spatial light modulator.
4. used the producing device of the drum type brake hologram of method according to claim 1, comprise: launch laser beam laser instrument, optical splitter, put down in writing optical projection system, the holographic imaging systems of the coded message of the image of taking the photograph, optical splitter is divided into reference light with laser beam and shines the thing light of optical projection system, it is characterized in that: described optical projection system is for pressing the image display system of row partition encoding to image information, described holographic imaging systems comprises imaging len and hologram recording material, and the corresponding exposure station on the hologram recording material is positioned at the focus place of imaging len; The thing light that carries optical projection system epigraph information converges to its focus place by imaging len, and is overlapping for a bit with the reference light that shines directly on the hologram recording material, exposes on hologram recording material.
5. the producing device of a kind of drum type brake hologram as claimed in claim 4 is characterized in that: described optical projection system is computing machine and the spatial light modulator that is connected with computing machine.
6. the producing device of a kind of drum type brake hologram as claimed in claim 5 is characterized in that: described holographic imaging systems also comprises can drive the hologram recording material mobile platform that the adapted space photomodulator moves on the focal plane of imaging len.
7. the producing device of a kind of drum type brake hologram as claimed in claim 5 is characterized in that: described holographic imaging systems also comprises the random scatter screen that is provided with before the spatial light modulator, and laser shines on the spatial light modulator after shielding by random scatter again.
8. the producing device of a kind of drum type brake hologram as claimed in claim 7, it is characterized in that: described holographic imaging systems also comprises before the hologram recording material places a size and the square diaphragm that hologram recording material adapts in the overlapping center of the hot spot of thing light and reference light, makes that per two adjacent exposure stations do not overlap mutually on the hologram recording material.
9. the drum type brake hologram that has used method according to claim 1 to make, it is characterized in that: the horizontal of described drum type brake hologram is made up of the measuring point that is no less than, the number of measuring point is corresponding with the visual angle number of the stereo-picture of reproduction, with the measuring point of the delegation capable information corresponding to the different same physical locations of picture; Vertically being made up of the measuring point that is no less than of drum type brake hologram, the number of measuring point is corresponding with digital pictures pixel count in vertical direction, and the measuring point of same row is corresponding to the capable accordingly information of same width of cloth picture.
10. drum type brake hologram as claimed in claim 9 is characterized in that: each measuring point all is square on the described drum type brake hologram.
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| CN2007100733040A CN101241204B (en) | 2007-02-09 | 2007-02-09 | Cylinder type hologram manufacture method, manufacture device and manufactured hologram |
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| CN101477326B (en) * | 2009-02-06 | 2012-04-04 | 苏州苏大维格光电科技股份有限公司 | Three-dimension graphics direct-writing method with multi-vision angle graphical input |
| CN102129211B (en) * | 2011-02-28 | 2013-10-23 | 深圳大学反光材料厂 | Method for making synthetic hologram |
| CN104360590B (en) * | 2014-11-18 | 2017-05-03 | 浙江师范大学 | Circular-viewing hologram calculating and coding method |
| DE102017120536B4 (en) | 2017-09-06 | 2023-12-14 | Ovd Kinegram Ag | Method for producing a hologram, as well as a security element and a security document |
| CN108957961A (en) * | 2018-06-26 | 2018-12-07 | 无锡光群雷射科技有限公司 | Holographic laser cylinder version production method |
| CN113514915B (en) * | 2021-06-18 | 2022-06-14 | 山东大学 | Vacuum filtering module for high-power laser and manufacturing method and application thereof |
| CN115032871B (en) * | 2022-07-06 | 2024-06-21 | 大爱全息(北京)科技有限公司 | Holographic free diffraction multilayer image display method, device and system |
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| CN1350212A (en) * | 2001-11-07 | 2002-05-22 | 苏州苏大维格数码光学有限公司 | Digital 3D optical variable image making process and laser photocomposition system |
| CN1564086A (en) * | 2004-03-29 | 2005-01-12 | 深圳市泛彩溢实业有限公司 | Mfg. method and appts. for digital speckle hologram |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1350212A (en) * | 2001-11-07 | 2002-05-22 | 苏州苏大维格数码光学有限公司 | Digital 3D optical variable image making process and laser photocomposition system |
| CN1564086A (en) * | 2004-03-29 | 2005-01-12 | 深圳市泛彩溢实业有限公司 | Mfg. method and appts. for digital speckle hologram |
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Address after: Songshan road 518104 Guangdong city of Shenzhen province Baoan District manhole street gang Tang Songshan Industrial Zone No. 12 Patentee after: AFC TECHNOLOGY Co.,Ltd. Address before: 518104, No. 138, Wan An Road, Wanfeng village, manholes Town, Shenzhen, Guangdong, Baoan District Patentee before: AFC TECHNOLOGY Co.,Ltd. |
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