CN106938544A - The 3D printing optical system of face type is monitored in real time - Google Patents
The 3D printing optical system of face type is monitored in real time Download PDFInfo
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- CN106938544A CN106938544A CN201710041305.0A CN201710041305A CN106938544A CN 106938544 A CN106938544 A CN 106938544A CN 201710041305 A CN201710041305 A CN 201710041305A CN 106938544 A CN106938544 A CN 106938544A
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- optical system
- face type
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- time monitoring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
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Abstract
The present invention relates to a kind of 3D printing optical system of real-time monitoring face type, including an interferometer, an illuminator, a DMD systems, a couple prism, a CCD systems, a relaying focusing lens and a projection lens, wherein, the projection lens is directed at liquid level, liquid level is corresponding with shaping workpiece, the couple prism is arranged on rear side of projection lens, it is correspondingly arranged respectively with DMD systems, CCD systems and illuminator, the relaying focusing lens are arranged on rear side of couple prism, and the interferometer is arranged on rear side of relaying focusing lens.Compared with prior art, present invention improves the design of existing photocuring 3D printer optical system, equipment has on-line checking function, it is possible to achieve more stable shaping quality.
Description
Technical field
The present invention relates to rapid three dimensional printing forming field, it is related to a kind of 3D printer, more particularly to one kind can be supervised in real time
The 3D printing system of control face type.
Background technology
3D printing is What You See Is What You Get, and the model designed from three-dimensional modeling software is directly changed into 3D solid.Tradition
Machining manufacturing technology is mainly to subtract material manufacture, including turning, milling, boring, brill, plane, grinding, polishing etc..General process
It is that processing technician is combined according to drawing from wherein several processing methods, so as to be machined.Each step all can be right
Material is removed, while needing to design the next auxiliary group of processing of complicated fixture.And three-dimensional printing technology belongs to increasing material manufacturing category, one
As need not carry out special frock clamp, once in a while only need change model, increase support zone.It enormously simplify manufacture
Process, while complex model can also be prepared quickly.
3D printing technique is broadly divided into SLA, DLP, FDM, SLS, DED, LOM etc..Current common three-dimensional printing technology essence
Degree is universal in hundred micron levels.Many materials can change optics, machinery, acoustics of material etc. by designing submicrometer structure
Characteristic.Such as photonic crystal, phonon crystal.Traditional DLP 3 D-printing Micro stereo lithographies, be with ultraviolet LED or
Mercury lamp illuminates dmd chip, using DMD as digital mask, DMD image is amplified by projection objective, the system projected.
The equipment for also monitoring printing surface type without interferometer on the market at present is released.
The content of the invention
In order to solve the above problems, the invention provides a kind of 3D printing optical system of real-time monitoring face type, including one
Interferometer, an illuminator, a DMD systems, a couple prism, a CCD systems, a relaying focusing lens and a projection lens
Head, wherein, the projection lens is directed at liquid level, and liquid level is corresponding with shaping workpiece, and the couple prism is arranged on after projection lens
Side, is correspondingly arranged with DMD systems, CCD systems and illuminator respectively, and the relaying focusing lens are arranged on after couple prism
Side, the interferometer is arranged on rear side of relaying focusing lens.
It is preferred that, above-mentioned optical system carries out face type monitoring and luminance detection while liquid level is printed.
It is preferred that, above-mentioned interference instrument is monochromatic interference instrument or white light interferometer.
It is preferred that, above-mentioned DMD systems are made up of dmd chip and drive circuit.
It is preferred that, said lighting system is LED or mercury lamp or laser.
It is preferred that, above-mentioned couple prism is made up of one piece of semi-transparent semi-reflecting lens and X prisms.
It is preferred that, above-mentioned projection lens is refraction type, the formula of penetrating of turning back, reflective, folding spread out formula microcobjective or refraction
Formula, the formula of penetrating of turning back, reflective, folding diffraction penetrate formula projective lens.
It is preferred that, above-mentioned x prisms are wavelength-division multiplex and polarisation multiplex system.
It is preferred that, above-mentioned interference instrument uses face on the basis of liquid level, monitors the optical path difference of liquid level and workpiece either in relaying
One piece of benchmark of increase is convex or recessed in focusing lens or level crossing, is used as reference plane.
Compared with prior art, the present invention uses interference light Cleaning Principle, improves existing photocuring 3D printer optical system
Design, equipment cost reduction, it is possible to realize more stable shaping quality.
Using liquid level as the plane of reference, the printing surface of the workpiece printed online is detected in real time, supervisory wavelength magnitude can be reached
Precision, can further improve the precision of monitoring by electronic fine-grained.Common 3D printing optical system can be according to this
The data of inventive principle detection, carry out Real-time Feedback modification printing technology parameter, so as to prepare high-precision workpiece.Use the present invention
Principle can prepare sphere, aspherical, free form surface imaging optic element, photon containing micro-structural can also be prepared brilliant
Body, can also prepare more high-accuracy nanometer ultra-light ultra-strong material, can also prepare vibration isolation quieter material of nanostructured etc..
Brief description of the drawings
The 3D printing optical system structure schematic diagram for the real-time monitoring face type that Fig. 1 provides for the present invention；
The interference pattern of the 3D printing optical system detection for the real-time monitoring face type that Fig. 2 provides for the present invention；
The 3D printing optical system for the real-time monitoring face type that Fig. 3 provides for the present invention improves embodiment schematic diagram；
Fig. 4 is a kind of interferometer principle assumption diagram；
Fig. 5 is X beam cementing prism schematic diagrames；
Fig. 6 is that X closes beam film 1,2 transmittance curve figures；
The 3D printing optical system for the real-time monitoring face type that Fig. 7 provides for the present invention improves embodiment schematic diagram.
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the present invention, below in conjunction with the accompanying drawings and embodiment
The present invention is described in further detail.
Embodiment 1
The 3D printing optical system for a kind of real-time monitoring face type that the present embodiment is provided, as shown in figure 1, including an interferometer, one
Illuminator, a DMD systems, a couple prism, a CCD systems, a relaying focusing lens and a projection lens, wherein, throw
Shadow alignment lenses liquid level, liquid level is corresponding with shaping workpiece, and couple prism is arranged on rear side of projection lens, respectively with DMD systems,
CCD systems and illuminator are correspondingly arranged, and relaying focusing lens are arranged on rear side of couple prism, and interferometer is arranged on relaying and adjusted
On rear side of zoom lens.Optical system carries out face type monitoring and luminance detection while liquid level is printed.Interferometer is monochromatic interference instrument
Or white light interferometer.DMD systems are made up of dmd chip and drive circuit.Illuminator is LED or mercury lamp or laser.Couple rib
Mirror is made up of one piece of semi-transparent semi-reflecting lens and X prisms.Projection lens is refraction type, the formula of penetrating of turning back, reflective, folding spread out formula microcobjective
Either refraction type, the formula of penetrating of turning back, reflective, folding diffraction penetrate formula projective lens.X prisms are wavelength-division multiplex and palarization multiplexing system
System.Interferometer uses face on the basis of liquid level, monitors the optical path difference of liquid level and workpiece and either increases by one in relaying focusing lens
Block benchmark is convex or recessed or level crossing, is used as reference plane.
The present embodiment is in print procedure, and interferometer can detect the face type of printing workpiece in real time, and Fig. 2 is the interference pattern of detection
Sample, by Inversion Calculation, draws the surface topography of institute's printed matter Products, so that shape, gray scale of correction exposure figure etc. in real time.Institute
Detection faces type error is in wavelength magnitude, if the interferometer of 632.8nm wave bands, and face type detection error can reach that 150nm is left
It is right.By digital image processing techniques, detected interference pattern is finely divided, surface precision detection can be made to reach 30nm.
Embodiment 2
As shown in figure 3, being a kind of modified scheme, illuminator is projected on DMD after first 45 ° of speculum, is returned
Projection lithography system is reflected into by X beam cementing prisms, liquid level is projected.Liquid level is returned after over-illumination by X beam cementing prisms
Into CCD camera, for monitoring the distribution of face exposure intensity in real time.The coherent light of interferometer projection 632.8nm wave bands passes through X ribs
By the face type interface of printing shaping in liquid level after mirror, light projection photoetching objective lens, Zygo interferometers are backed into.By wavefront inverting
Calculate, reduce the face type printed.Interferometer can be fizeau interferometer or other kinds of interferometer, wherein making
It is Zygo interferometers with typical interferometer, its wavelength is 632.8nm or using other relevant or partially coherent light sources
Interferometer.The present embodiment is described with Zygo interferometers.Wherein reference plane can be liquid level, and measured surface is molded
Workpiece surface.
As shown in figure 4, being a kind of enforceable interferometer schematic diagram, light source is by 45 ° of speculum transmissions, by collimating mirror
Head is into collimated light beam, and by relaying camera lens, adjustment relaying camera lens makes light beam export into directional light from projection lithography camera lens.Liquid level can
To regard the sphere of earth radius as, as reference plane, liquid gap is formed with measured workpiece surface, the workpiece refractive index of solidification with
Uncured resin index material is different, due to liquid level with Air Interface, resin workpiece interface in the presence of this alunite ear reflex, therefore
Newton interference fringe can be formed, while being gathered as digital picture.
The whole system of the present embodiment performs following operating procedure：
1. illuminator is opened；
The figure that 2.DMD projections are currently printed；
3.CCD detection liquid levels light exposure, interferometer detect printed face type；
4. it is distributed according to present intensity, face type, object module, shape, gray scale of the next width picture of optimization correction etc.；
5. next width figure after projection correction, repeats the 3rd step.
In the case study on implementation, the incident combiner projection in three directions is entered resin storage tank by X beam cementing prisms.This example is two
The incident beam cementing prism in individual direction, the 3rd direction is used as acquisition window.Film Design is carried out to X beam cementing prisms, one of X is closed
Beam prism optical thin film characteristic can be as shown in Figure 4.
Embodiment 3
As shown in figure 4, projection lithography illumination light is projected on DMD after first 45 ° of speculum, conjunction beam rib is backed into
Mirror.Interferometer is directly entered beam cementing prism.530nm lighting sources enter back into beam cementing prism after 45 ° of speculums.Three road light warps
Beam cementing prism outgoing enters after projection lithography system, and shaping is exposed in liquid level.Wherein CCD illumination lights, interferometer light edge are former
Road returns and respectively enters CCD and interferometer.
The whole print system operating procedure of the present embodiment is as follows：
1.DMD projects current printing curve；
2.530nm illuminators are opened；
3.CCD detection faces Luminance Distributions；
4. closing 530nm illuminators, interferometer is opened；
5. interferometer detection ought above type；
6. it is distributed according to present intensity, face type, object module, shape, gray scale of the next width picture of optimization correction etc.；
Next width figure after projection correction, repeats the 1st step.
Compared with prior art, this invention simplifies the design of existing photocuring 3D printer optical system, equipment cost drop
It is low, it is possible to realize more stable shaping quality.
Using liquid level as the plane of reference, the printing surface of the workpiece printed online is detected in real time, supervisory wavelength magnitude can be reached
Precision, can further improve the precision of monitoring by electronic fine-grained.Common 3D printing optical system can be according to this
The data of inventive principle detection, carry out Real-time Feedback modification printing technology parameter, so as to prepare high-precision workpiece.Use the present invention
Principle can prepare sphere, aspherical, free form surface imaging optic element, photon containing micro-structural can also be prepared brilliant
Body, can also prepare more high-accuracy nanometer ultra-light ultra-strong material, can also prepare vibration isolation quieter material of nanostructured etc..
It is understood that for those of ordinary skills, can be with technique according to the invention scheme and its hair
Bright design is subject to equivalent or change, and all these changes or replacement should all belong to the guarantor of appended claims of the invention
Protect scope.
Claims (9)
1. a kind of 3D printing optical system of real-time monitoring face type, it is characterised in that：The 3D printing light of the real-time monitoring face type
System include an interferometer, an illuminator, a DMD systems, a couple prism, a CCD systems, one relaying focusing lens with
And a projection lens, wherein, the projection lens is directed at liquid level, and liquid level is corresponding with shaping workpiece, and the couple prism is arranged on
On rear side of projection lens, it is correspondingly arranged respectively with DMD systems, CCD systems and illuminator, the relaying focusing lens are arranged on
On rear side of couple prism, the interferometer is arranged on rear side of relaying focusing lens.
2. the 3D printing optical system of real-time monitoring face type according to claim 1, it is characterised in that：The optical system
Face type monitoring and luminance detection are carried out while liquid level is printed.
3. the 3D printing optical system of real-time monitoring face type according to claim 1, it is characterised in that：The interferometer is
Monochromatic interference instrument or white light interferometer.
4. the 3D printing optical system of real-time monitoring face type according to claim 1, it is characterised in that：The DMD systems
It is made up of dmd chip and drive circuit.
5. the 3D printing optical system of real-time monitoring face type according to claim 1, it is characterised in that：The illuminator
For LED or mercury lamp or laser.
6. the 3D printing optical system of real-time monitoring face type according to claim 1, it is characterised in that：The couple prism
It is made up of one piece of semi-transparent semi-reflecting lens and X prisms.
7. the 3D printing optical system of real-time monitoring face type according to claim 1, it is characterised in that：The projection lens
Refraction type, the formula of penetrating of turning back, it is reflective, folding spread out formula microcobjective either refraction type, the formula of penetrating of turning back, it is reflective, folding diffraction penetrate
Formula projective lens.
8. the 3D printing optical system of real-time monitoring face type according to claim 7, it is characterised in that：The X prisms are
Wavelength-division multiplex and polarisation multiplex system.
9. the 3D printing optical system of the real-time monitoring face type according to one of claim 1-8, it is characterised in that：It is described dry
Interferometer uses the optical path difference or one piece of benchmark of increase in relaying focusing lens in face on the basis of liquid level, monitoring liquid level and workpiece
Convex or recessed or level crossing, is used as reference plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710041305.0A CN106938544A (en) | 2017-01-20 | 2017-01-20 | The 3D printing optical system of face type is monitored in real time |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710041305.0A CN106938544A (en) | 2017-01-20 | 2017-01-20 | The 3D printing optical system of face type is monitored in real time |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764524A (en) * | 2017-10-11 | 2018-03-06 | 安溪县贤彩茶叶机械有限公司 | A kind of 3D printing accuracy monitoring device based on laser detection |
| CN107843205A (en) * | 2017-10-31 | 2018-03-27 | 中国科学院合肥物质科学研究院 | A kind of 3D printing feedback measurement apparatus and method based on laser interference |
| CN108437448A (en) * | 2018-02-02 | 2018-08-24 | 深圳摩方新材科技有限公司 | A kind of optical path accurate Method of Adjustment of micro-nano size 3D printing equipment |
| CN109774128A (en) * | 2019-03-13 | 2019-05-21 | 东北师范大学 | Photoetching and printing integratedization equipment and its construction method based on DMD |
| CN109927296A (en) * | 2017-12-15 | 2019-06-25 | 成都熠辉科技有限公司 | A kind of image information collecting system for 3D printing |
| CN112823313A (en) * | 2018-04-17 | 2021-05-18 | 深圳摩方新材科技有限公司 | Method and system for manufacturing three-dimensional object |
| CN113905873A (en) * | 2019-05-03 | 2022-01-07 | 奥迪股份公司 | 3D printing device for photopolymerizing photosensitive synthetic resin by illumination pattern |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764524A (en) * | 2017-10-11 | 2018-03-06 | 安溪县贤彩茶叶机械有限公司 | A kind of 3D printing accuracy monitoring device based on laser detection |
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| CN107843205A (en) * | 2017-10-31 | 2018-03-27 | 中国科学院合肥物质科学研究院 | A kind of 3D printing feedback measurement apparatus and method based on laser interference |
| CN109927296A (en) * | 2017-12-15 | 2019-06-25 | 成都熠辉科技有限公司 | A kind of image information collecting system for 3D printing |
| CN108437448A (en) * | 2018-02-02 | 2018-08-24 | 深圳摩方新材科技有限公司 | A kind of optical path accurate Method of Adjustment of micro-nano size 3D printing equipment |
| CN108437448B (en) * | 2018-02-02 | 2019-12-17 | 深圳摩方新材科技有限公司 | Light path precise adjusting method of micro-nano-sized 3D printing equipment |
| CN112823313A (en) * | 2018-04-17 | 2021-05-18 | 深圳摩方新材科技有限公司 | Method and system for manufacturing three-dimensional object |
| CN112823313B (en) * | 2018-04-17 | 2024-04-16 | 深圳摩方新材科技有限公司 | Method and system for manufacturing three-dimensional object |
| CN109774128A (en) * | 2019-03-13 | 2019-05-21 | 东北师范大学 | Photoetching and printing integratedization equipment and its construction method based on DMD |
| CN109774128B (en) * | 2019-03-13 | 2021-01-08 | 东北师范大学 | Photoetching and printing integrated equipment based on DMD and construction method thereof |
| CN113905873A (en) * | 2019-05-03 | 2022-01-07 | 奥迪股份公司 | 3D printing device for photopolymerizing photosensitive synthetic resin by illumination pattern |
| CN113905873B (en) * | 2019-05-03 | 2023-08-29 | 奥迪股份公司 | 3D printing apparatus for photopolymerizing photosensitive synthetic resin by illumination pattern |
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