CN1005968B - Method for generating macroscopic surface pattern with microstructure - Google Patents
Method for generating macroscopic surface pattern with microstructure Download PDFInfo
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- CN1005968B CN1005968B CN85105065.4A CN85105065A CN1005968B CN 1005968 B CN1005968 B CN 1005968B CN 85105065 A CN85105065 A CN 85105065A CN 1005968 B CN1005968 B CN 1005968B
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- 230000005611 electricity Effects 0.000 description 1
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Abstract
Heating approximately point-shaped surface units of a thermoplastic plastic thin layer (3) by a beam source (12) to ensure that the microstructure of the imprinting bottom die (4) is only copied in the surface units to generate a surface pattern with a light diffraction effect structure, and combining a plurality of surface units into the surface pattern by relatively moving the film (3) to a focus (14) of the beam source (12) and repeatedly imprinting, wherein the imprinting bottom die (4) can rotate or be replaced between two adjacent imprinting processes, the imprinted edge is clear, and a seam part which is easy to generate defects does not exist.
Description
The present invention relates to the method for the generation of a macroscopic surface pattern with microstructure, this method utilization forms a selected surface region that the impression bed die of microstructure is arranged on the thermoplastic thin layer.
The purposes of this surface pattern is for example as the optical diffraction secret unit (EP-A-O 105099) on file.They may be geometric figure, numeral, letter, ornament, turn round forms such as Suo Pin decorations, also can for example get up a lot optical diffraction unit strings synthetic, synthetic basis like this is following true, promptly there is the interference stack of the coherent beam of different incidence angles can produce diffraction structure, it converts surface microscopic section (EP-A-O 105099) to by the method for photoetching, and the fixing here system of giving optical mask can be used to determine the geometric areas of exposure.Surface pattern of Sheng Chenging and its microstructure are complicated to certain degree if desired, and then mask process is very expensive.In addition, have the optically diffractive structure unit of asymmetrical section, for example special sawtooth pattern can not generate with interferometric method above-mentioned.
Known structure with Light Diffraction Effect can be exerted pressure on a thermoplastic substrate and heats such as phase place diffraction light, phase hologram etc. by an impression bed die, and punching press or impression produce (swiss patent specification NO 594495).So, have the Light Diffraction Effect structure surface pattern synthetic also can by many phase place diffraction element on a thermoplastic substrate, repeat impression again string form together.But the result of the method can not be satisfactory, just on the one hand in the pressure area that is heated with between the region of no pressure that is not heated outside the embossed region, produce troublesome seam at the edge of impression; Different on the other hand embossed region can have contact or seam to connect airtight together.Because the high heat of embossed metal bed die means at the edge of new impression, contiguous, old impression border area must be eliminated.
Also known from swiss patent specification NO 594495, have on the thermoplastic thin layer the selected district of impression bed die that reproduce, microstructure for one, adopting the thermoplastic substrate is the local heat or the method for pressurized just.But, the boundary that this operation can not produce clearly between embossed region and non-embossed region, determine.
Main task of the present invention provides a kind of production and has the method that microstructure particularly has the macroscopic surface pattern of Light Diffraction Effect structure, and it makes and might utilize microstructure to produce surface pattern economically.The method be will from impression bed die, choose with microstructure surf zone be shaped, its surface pattern has clearly and fixes limit, without any defective marginal portion.
The invention is characterized in approximate some surface cell shape, that be in described electron gun focal position with a source heating thermoplastic plastic sheet, the microstructure of impression bed die only plastically is shaped at described surface cell, and many such surface cells have been formed this surface pattern.
After this explain example of the present invention in more detail by means of accompanying drawing.
Wherein Fig. 1 is the basic principle figure that is used to produce the surface pattern device
Fig. 2-4 shows different surface patterns
Fig. 5 is formpiston figure
Fig. 6 is the basic principle figure that is used to scan the original pattern device
In out-of-proportion Fig. 1, one plane, rigidity and the optically transparent pressing plate of label 1 expression.Being fixed on above it is optically transparent substrate 2 its fixed forms, expression among the figure.Have the surperficial topped of substrate 2 of certain distance to have one deck to absorb the thin layer 3 that radiative material is made by thermoplastic 3 with pressing plate plane 1, impression has microstructure thereon, and the macroscopic surface pattern of Light Diffraction Effect structure is particularly arranged.Thin layer 3 can be for example black or colored plastic sheeting or paper tinsel, can also utilize such as the padding with substrate 2 such as the material with carbon element of the colloidal substance in the plastic solution to form, and its typical thickness is 0.1 to 10 micron.
On thermoplastic thin layer 3 opposites are impression bed dies 4 that are not heated, and it has the microstructure of reappearing with domain mode.Bed die 4 can be made by for example nickel alloy, makes it flexible.Like this, can produce an impression pressure with formpiston 5, the pressure between impression bed die 4 and the thermoplastic thin layer 3 is defined as the pressure on the per surface area.The typical thickness of impression bed die is 100 microns.The convex surfaces that best formpiston 5 will have a radius of curvature representative value to be about 7 millimeters.With pressure generator 6, formpiston 5 presses impression bed die 4, and impression bed die 4 (its diameter representative value is 3 millimeters) in little contact zone 7 scopes pressurizes to thermoplastic thin layer 3.It is fixing that the just simple bed die bearing of representing 8 will impress bed die 4 in Fig. 1, and it can only be contacted with thermoplastic thin layer 3 surfaces in this 7 scope, in other zone and thin layer one dot spacing arranged.Bed die bearing 8 preferably constitutes like this, makes a small amount of simple manual operations of impression bed die 4 usefulness or mechanically actuated just turn or can change the impression bed die that another has the diverse microcosmic structure when pressure generator 6 is in dormant state.
The one side away from impression bed die 4 that is placed in pressure surface plate 1 is an electron gun 12, it preferably is made up of laser instrument 9, optical modulator 10 and a lens combination 11, and the heat bundle that will focus on or light beam 13 are positioned on thermoplastic thin layer 3, and roughly the focus 14 at 7 center focuses in the contact zone.Because to the thin layer 3 around focus 14 being heated directly into beam 13 and in the absorption that impresses reflecting bundle on the bed die 4.The diameter of focus 14 is generally less than 100 microns energy of can or regulating heat bundle or light beam with modulator 10 with being switched on or switched off.
Pressure generator 6 allow formpistons 5 just-direction of principal axis, promptly the vertical line direction on parts 1 to 4 surface moves.These parts of this device described above are installed on (not drawing among a figure) base plate with the following method, make pressing plate 1, have the substrate 2 of thermoplastic thin layer 3 and impress bed die 4, can move each other; They can not only equally also can move at the y-direction of principal axis at the x-axle with respect to focus 14 and formpiston 5, promptly on a plane that is parallel to thermoplastic thin layer 3, move continuously or step by step.Parts 1 to 4 are movably for this purpose, and parts 5 and 12 are fixed, otherwise perhaps.Also may be like this: parts 1 to 4 and 12 be fixed, move on the x-y plane and make light beam 13 follow the tracks of formpiston 5 with a mirror system.
Utilize 6 pairs of impressions of pressure generator pressure to do following adjusting: 7 thermoplastic thin layers 3 are only made strain by the microstructure of impression bed die 4 in the contact zone under the state of cooling, when impressing pressure by removal, with regard to the loose reset condition of getting back to, it is level and smooth state, on the other hand, if connect bundle 13 when adding impression pressure, radiation absorbs thermoplastic superficial layer 3 and can be heated to more than its softening temperature at an approximate point-like surface cell place of the focus 14 of electron gun 12, temperature is elevated to so degree, make in the surface cell of mentioning in the above, plastic deformation takes place in the surface of thin layer 3, and its shape is corresponding with the microstructure of impression bed die 4.Impress pressure and remove after cooling, the structure that is stamped remains unchanged.Desirable surperficial sample is made up of many such surface cells.
In the ways of writing of static state, light beam 13 is being switched on of short time just.Then on the one hand by the conduction of the heat in impression bed die 4 and formpiston 5, on the other hand by the conduction of the heat in thin layer 3 and substrate 2, the hurried cooling of the volume of heated thermoplastic thin layer 3.Pressure generator 6 moves formpiston 5 and makes it to be in position of rest, thereby and will impress bed die 4 separately with thermoplastic thin layer 3, near focus 14, kept the structure that is stamped.Such moulding process repeats continuously.Disconnect electron gun 12 and removing impression pressure, when promptly being between twice impression, substrate 2 and its thermoplastic thin layer 3 on the x-y plane, move a given amount in a given direction with respect to focus 14 and formpiston 5.In the time of between twice impression, impression bed die 4 can be changed or reverse a given amount around the X-direction of principal axis.Thus, the zone that be bound up or that stand each other of thin layer 3 can be printed on microstructure arbitrarily.
In the dynabook WriteMode, connecting electron gun 12 and pressure generator 6 when in running order, impression bed die 4 and the substrate 2 that has a thin layer 3 constantly move with respect to focus 14 and formpiston 5 speed with appointment, thus impression bed die 4 microstructures, interconnected band-like surface district will be replicated on the thin layer 3.In dynamic written form, also can produce by continuous shaping and to have microstructure, desired surface pattern.
According to the macroscopic surface pattern of having described that method produced can be geometric figure, numeral, letter, ornament, guilloching or the like, their microstructure is formed independent perhaps how different phase place diffraction light, phase hologram, film image (Kinoform) and an analog, thereby, for example may in thermoplastic thin layer 3, use microstructure to produce a complicated weave pattern of forming by lines that interweave, macroscopical economically by the optical diffraction effect.There microstructure retinue and change or even change in quasi-continuous mode along a line, thereby human eye is seen the guilloching pattern effect of the movable colored ribbon of band.But described method also can be used on and for example produces the good microstructure that equates with profile, as in that to be referred to as to call in the integrated optics technology (integrated otics) used.
From the surface pattern that thermoplastic thin layer 3 generates, adopt known chemistry and electric technology might produce the duplicate of embossed metal bed die shape.The impression bed die of Chan Shenging can be for a large amount of usefulness of producing surface pattern in common imprinting apparatus like this.
Fig. 2 expresses along the y-axle and is write fillet or the arrowband that moves generation by single as the letter example according to the surface pattern that describing method produced.The width of fillet or arrowband is approximately equal to or is a bit larger tham the diameter of focus 14, for example is 50 microns.The structure example of fillet shape in this way one in every millimeter, have the linear phase diffraction light of 10 to 2000 lines to spread out.
These fillets are arranged in rows, as shown in Figure 3, can generate the surface pattern that requires size arbitrarily, it has adjacent fillet and is engaged with each other, not microstructure of fracture a bit.When a series of such fillets are placed side by side, and when impression bed die 4 did not have relative motion for thin layer 3, the structure lines of the microstructure of generation were continuously by a series of fillets, as shown in Figure 3.
Fig. 4 represents that the structure that is generated can rewrite again.In this case, if the sufficiently high words of the energy density of light beam, old structure will disappear.Because write in the operation in the first step, do not need to vacate those and write in second step that is right after and be the topped surf zone of other structure in the operation, make the production process simplification of this labyrinth.
But the energy density and the writing speed of accurately quantitative control bundle 13 also might impress out a new construction on old structure, and in this operation, old structure are with complete obiterations.
Present advantage of the present invention is apparent.As mentioned above, can obtain having the very thin lines or the point-like surface of the microstructure of Light Diffraction Effect, also can obtain more large-area surface portion connected to one another.This microstructure does not have visible joint lines, partly writes on above another by generation microstructure in the adjacency medium or with a microstructure to obtain.The structure of the single surface cell of this surface pattern may be identical or be had nothing in common with each other, and also might produce the microcosmic section that can not obtain with coherent method, and the edge of impression can clearly be determined, does not contain the seam that makes troubles.In a word, described method provides the possibility of the microstructure of synthetic meticulous profile for the first time, it broken away from leave no choice but originally can not the rigid masks system, in the present invention, the course of work can realize full-automation by digital programme-control.
Iff in focus 14 zones being usefulness formpiston 5 generation impression pressure, then at whole impression in the time, in the pressurization contact position that does not form micro-structural of thin layer 3 and impression bed die 4, undesirable local cooling deformation can be reduced to the degree of certain necessity according to the time and the frequency of pressurization.In addition, the replacing of bed die is very easily.With produce pressure on whole surface and come ratio, used in fact force of impression is littler, thereby makes the easier realization of Machine Design of this device.
Fig. 5 represent formpiston 5 ', it comprises ball bracing frame 15 and ball 16.Ball 16 is placed in the garden cylindrical space 17 that is arranged in bracing frame 15, and calcaneus branches support 15 has a spot of space.The longitudinal axis of garden cylindrical space 17 is consistent with z-axle (Fig. 1).The part of ball 16 is stretched out bracing frame 15, form formpiston 5 ' convex surface.Garden cylindrical space 17 by compressed air hose 18 and magnetic valve 19 with as pressure generator 6 ' compressed air source 20 be connected.
The atmospheric pressure that increases progressively in space 17 is pressed to impression bed die 4(Fig. 1 with ball 16), this pressure can be switched on or off by valve 19 controls, and can fine tuning in wide scope, thereby allows fine adjustment impression pressure.Grind coining power with the moving automatically cut-out of valve 19 and can change, rotate or move impression bed die 4 easily.The edge of ball 16 is supported by mattress, to guarantee ball low resistance to rolling is arranged.The leakage air of being overflowed between the barrel of ball 16 and ball guiding parts provides the air cooling for ball 16.
Label 21 refers to an original pattern among Fig. 6, and its macroscopic surface pattern 22 is by 23 scannings of an optical scanner, and as one at thin layer 3(Fig. 1) on microstructure arranged macroscopic surface pattern chi true reappearance in proportion.Mobile unit 24 makes the scanner of being made up of light source, lens combination and photo-detector (not drawing among the figure) 23 follow the tracks of at original pattern 21 lastrows capablely.Simultaneously, focus 14 and formpiston 5 synchronously move with respect to thin layer 3 and impression bed die 4.Represent the lever system of pantograph 25 forms in the accompanying drawings, it is promoted by mobile unit 24, rotates round a fixed pivot 26.The control input end 29 that the electricity output of scanner 23 is received the modulator 10 of electron gun 12 by amplifier 27 and threshold switch 28.
If the local reflex of original pattern 21 surpasses certain predetermined value, modulator 10 is opened, so the micro-structural of impression bed die 4 just produces on the corresponding points of thin layer 3; When reflectivity is lower than certain predetermined value, then opposite, promptly do not form nonvolatil micro-structural, the structure that may impress before yet not eliminating.
Claims (10)
1, a generation has the method that microstructure particularly has the macroscopic surface pattern of Light Diffraction Effect structure, this method is utilized at thermoplastic thin layer (3) and is gone up selected surface region that the impression bed die (4) of microstructure is arranged of formation, it is characterized in that: with approximate some surface cell shape, that be in described electron gun focal position (14) of an electron gun (12) heating thermoplastic plastic sheet (3), the microstructure of impression bed die (4) only plastically is shaped at described surface cell, and many such surface cells have been formed this surface pattern.
2,, it is characterized in that only just producing impression pressure in focus (14) zone according to the method for claim 1.
3, according to the method for claim 2, it is characterized in that: the impression pressure in focus (14) zone is to have the formpiston (5,5 ') of convex surfaces to produce with one.
4, according to the method for claim 3, it is characterized in that: the band-like surface district that interconnects of the microstructure of impression bed die (4) is moved incessantly and is formed on the thermoplastic thin layer with respect to focus (14) and formpiston (5) by impression bed die (4) and thermoplastic thin layer (3).
5, according to the method one of in the claim 1 to 3, it is characterized in that: when electron gun (12) was cut off and impresses the pressure cancellation, thermoplastic thin layer (3) was in a step-wise fashion to move with respect to focus (14).
6, according to the method for claim 5, it is characterized in that: impression bed die (4) is rotated or changes in mobile step.
7, according to the method for claim 1, it is characterized in that: synchronously scan original pattern (21) corresponding to impression bed die (14) with an optical scanner (23), and thermoplasticity plastic thin layer (3) is mobile with respect to focus (14), and electron gun (12) is by the output signal control of scanner (23).
8, enforcement is according to the device of the method for claim 1, comprise one smooth, hard pressing plate (1), the substrate (2) that thermoplastic thin layer (3) are arranged, an impression bed die (4) and a formpiston (5,5 '), it is characterized by: electron gun (12) is configured in one side that pressing plate (1) does not face toward formpiston (5), described electron gun (12) focus (14) is with the surface cell heating that is similar to point-like of thermoplastic thin layer (3), formpiston (5,5 ') convex surface arranged, and produce impression pressure in focus (14) zone, impression bed die (4) and thermoplastic thin layer (3) be contained in one with plane that thermoplastic thin layer (3) walks abreast mutually on, and can be with respect to focus (14) and formpiston (5,5 ') move.
9, device according to Claim 8, it is characterized in that: formpiston (5 ') comprises ball bracing frame (15) and ball (16), ball (16) is placed in cylindrical space (17) lining that is positioned at ball bracing frame (15), and cylindrical space (17) is connected with compressed air source (20) by compressed air hose (18).
10, according to Claim 8 or 9 device, it is characterized in that having a mobile unit (24), its control optical scanner (23) is gone up scanning in original pattern (21), and impression bed die (4) and thermoplastic thin layer (3) locking phase therewith move for focus (14) and formpiston (5,5 ').The electric output of scanner (23) is connected with the control input end (29) of electron gun (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85105065.4A CN1005968B (en) | 1985-07-03 | 1985-07-03 | Method for generating macroscopic surface pattern with microstructure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85105065.4A CN1005968B (en) | 1985-07-03 | 1985-07-03 | Method for generating macroscopic surface pattern with microstructure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85105065A CN85105065A (en) | 1986-12-31 |
| CN1005968B true CN1005968B (en) | 1989-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85105065.4A Expired CN1005968B (en) | 1985-07-03 | 1985-07-03 | Method for generating macroscopic surface pattern with microstructure |
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| Country | Link |
|---|---|
| CN (1) | CN1005968B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10346124B4 (en) * | 2003-10-01 | 2005-12-01 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Tool and method for producing a microstructured surface and use of a tool and the object produced therewith |
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1985
- 1985-07-03 CN CN85105065.4A patent/CN1005968B/en not_active Expired
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| Publication number | Publication date |
|---|---|
| CN85105065A (en) | 1986-12-31 |
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Free format text: CORRECT: PATENTEE; FROM: LANDISHIJIER STABILITY LTD. TO: OVD JINIGELAMU STOCK COMPANY Free format text: CORRECT: PATENTEE; FROM: LGZ LANDIS JELZUG LTD TO: LANDISHIJIER STABILITY LTD. |
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