EP3448662A1 - Vorrichtung zur bildung formstabiler objekte - Google Patents
Vorrichtung zur bildung formstabiler objekteInfo
- Publication number
- EP3448662A1 EP3448662A1 EP17721966.4A EP17721966A EP3448662A1 EP 3448662 A1 EP3448662 A1 EP 3448662A1 EP 17721966 A EP17721966 A EP 17721966A EP 3448662 A1 EP3448662 A1 EP 3448662A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- tub
- light source
- substance
- trough
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/245—Platforms or substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/264—Arrangements for irradiation
- B29C64/268—Arrangements for irradiation using laser beams; using electron beams [EB]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/264—Arrangements for irradiation
- B29C64/277—Arrangements for irradiation using multiple radiation means, e.g. micromirrors or multiple light-emitting diodes [LED]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
-
- 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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- 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
Definitions
- the invention relates to a device for forming dimensionally stable objects by partially solidifying a non-dimensionally stable, in particular light-curable, substance by irradiation with a particular electromagnetic radiator, comprising a trough for receiving the substance and a arranged over the tub and lowered over this and liftable build platform for adhering and lifting hardened substance layers.
- the non-rigid substance for example, a plastic monomer
- the construction platform is arranged parallel to the bottom of the tub and can be moved in a plane that is normal to the bottom of the tub.
- the build platform is aligned so that there is a gap between the build platform and the bottom of the tub, which has the height of the desired layer thickness of the first substance layer.
- the radiation source is switched off.
- a gap having the height of the desired layer thickness of the next substance layer between the bottom of the trough and the already existing substance layer on the construction platform has to be generated again.
- the build platform is moved in a plane that is normal to the bottom of the tub by a predetermined, mostly experience based, value in the range of 6 - 12mm, so as to completely replace the
- Adjust substance layer Thereafter, the next substance layer can be generated.
- the number of substance layers depends on the desired layer thickness and on the height of the dimensionally stable object to be generated, but is usually in the range of 50 to 5,000.
- the bottom of the tub made of flexible or partially flexible materials such as silicone layers, PTFE films, or the like.
- the bottom of the tub can deform elastically during the detachment process.
- the substance layer can easily peel off, the necessary force for detachment is reduced and thus the detachment process is improved.
- the floors of these generic devices are usually made transparent.
- the build platform for detachment of the substance layer from the bottom of the tub must always by a, mostly based on experience, preset value, for example 6 mm to 12 mm in a plane, which is normal to the bottom of the tub, be moved.
- Construction platform several millimeters unnecessarily empty moves. This unnecessarily lengthens the detachment process by several seconds.
- the invention is therefore inter alia the object to monitor the detachment process, so optimized by the accurate detection of the Ablensezeitrelatess the necessary shift of the build platform and thus the construction time of a dimensionally stable object can be greatly reduced.
- Other objects of the invention include the level of non-dimensionally stable substance in the tub, the deformation of the tub by the lowering of the platform, the deformation of the tub by the capillary forces between the platform and the bottom of the tub, the sag of the tub, the state the tub, and / or that
- the problems are solved by at least one light source and at least one, the light of the light source detecting, the light sensor are arranged in the region of the bottom of the tub, that a deformation of the tub is detected by changing the light detected by the light sensor intensity of the light source.
- the term light source in this context includes any emitter of electromagnetic radiation, and the term light sensor any type of receiver which is adapted to detect this radiation.
- the light beam emitted by the light source passes at least partially through the bottom of the trough.
- the bottom of the tub thus forms a light guide, so that changes in the mechanical configuration of the bottom of the tub, the light guided therein is deflected or scattered. Upon deformation of the bottom of the tub thus changes the
- Incident angle of the incident light so that a larger part of the incident light leaves the tub, as in the case of the non-deformed, so straight-line
- This effect which is known from optical waveguide technology, can thus be used to detect the mechanical deformation of the trough bottom by using the trough bottom as a light guide or comprising a light guide.
- Detection time can be determined exactly. Thus, it can be ensured that the construction platform is lowered again immediately after the detected detachment of the substance layer from the bottom of the tub. At conventional take-off speeds of about 1 mm per second, the detachment process is thereby reduced by a few seconds and so the construction time of a dimensionally stable object in the device, which
- Withdrawal force can be calculated. If this is not the case, a detachment of the substance layer from the build platform can be concluded.
- the zero position of the build platform can be determined and adjusted.
- the generated layer thickness of the substance layer also coincides more precisely with the set layer thickness.
- the level of the non-dimensionally stable substance in the tub can be determined and monitored.
- Objects are automatically paused.
- the deformation can be detected by the lowering of the construction platform.
- Substance layer has lowered the build platform again to set the desired layer thickness (25 - 200 ⁇ ) of the next substance layer.
- the time required to lower the build platform is called the reset time. Due to this reduction and thus the displacement of non-dimensionally stable substance between the building platform and the bottom of the tub, the bottom of the tub is elastically deformed. The degree of deformation depends inter alia on the filling quantity and the viscosity of the dimensionally stable substance and the lowering speed of the building platform.
- Solidification reduced and the entire construction period of a dimensionally stable object can be greatly reduced. From the required recovery time and the viscosity of the non-dimensionally stable substance can be determined at any time.
- the deformation due to capillary forces between the building platform and the bottom of the tub can be detected.
- the sag of the tub which comes about as a result of the aging and the wear of these, can be detected.
- the problems caused thereby such as different layer thicknesses and adhesion problems of the substance layer, can be avoided by, for example, replacing the tub with too much sag.
- the state of the trough can be detected. Due to the diffusion of various ingredients of not
- the quality of the tub is changed. Since the substances diffusing into the tub often cause turbidity of the tub, the quality of the tub can be monitored with the device according to the invention.
- At least the bottom of the tub is made partially or wholly of a light-conducting material.
- a light guide which guides the light beam of the light source to be provided, for example in the form of a glass fiber line, and is preferably arranged in the bottom of the tub.
- the light source is designed as a laser, LED or the like or comprises such elements.
- the light sensor has at least one photosensitive element, in particular a photodiode with a
- Transimpedance converter as amplifier, which detects the intensity of the emitted light from the light source and an electrical signal
- At least one optical element preferably a mirror, a prism or the like, is provided. This allows the
- Light sensor and the light source can be easily installed in the machine, without disturbing the appearance of this and without changing the dimensions of the machine.
- At least one optical element preferably a convex lens, is provided for focusing the light emitted by the light source, preferably on at least one light sensor.
- the device is set up to detect the detachment process of the substance layer from the bottom of the trough and / or from the construction platform.
- the bottom of the tub made of flexible and / or partially solid materials, preferably made of silicone layers, PTFE films or the like, whereby the tub can deform elastically when lifting hardened substance layers. Due to this flexibility of the tub, the substance layer can be more easily detached from the bottom of the tub, the necessary force for detachment is reduced and thus the detachment process is improved.
- the bottom of the trough may in particular comprise combinations of substantially rigid and elastic or viscous materials, for example in the form of a sandwich construction: glass plate on silicone foil, acrylic glass plate on silicone foil, glass plate on silicone plate, glass on highly viscous gel or other combinations.
- the deformation of the trough can not be measured exclusively in the particularly elastic layer, but also, for example, in the deformation of the essentially rigid material,
- Plexiglas plate for example, a Plexiglas plate.
- the bottom of the trough is at least partially transparent in the spectrum of the light emitted by the light source.
- the device comprises at least one analog-to-digital converter, whereby the signal can be processed computer-assisted.
- the construction platform is displaceable in a plane that is normally on the floor of the tub.
- the invention further extends to a method for the detection of
- dimensionally stable objects wherein according to the invention emitted by a light source and passed through the tub or an arranged in the tub light guide light is detected by a light sensor.
- the detachment process can be monitored and it can be determined when the substance layer separates from the tub.
- the viscosity of the material located in the tub is determined by the reset time of the building platform.
- FIG. 1 a shows a schematic representation of a first embodiment of a device according to the invention in a two-dimensional sectional representation.
- the bottom of the tub 2 serves as a light guide, which the
- Light beam 9 of the light source 6 passes.
- the tub 2 contains the non-dimensionally stable substance 3, for example a resin.
- the building platform 1 is arranged parallel to the bottom of the tub 2 and displaceable in a plane which is normal to the bottom of the tub 2. In this figure is shown as out of the non-dimensionally stable substance 3 by electromagnetic
- a substance layer 5 is formed.
- a light source 6 and a light sensor 7 detecting the light of the light source 6 are arranged such that a deformation of the tub 2 causes a change in the light intensity of the light source 6 detected by the light sensor 7.
- the light source 6 is arranged on one side of the trough bottom, and the light sensor 7 on the other side of the trough bottom.
- Fig. 1 b shows the situation when the curing of the substance layer 5 is completed by the radiator 4.
- the construction platform 1 In order to be able to detach the substance layer 5 from the bottom of the trough 2, the construction platform 1 is displaced upwards in a plane which is normal to the bottom of the trough 2. Due to the formation of the substance layer 5 cohesive forces between the building platform 1 and the substance layer 5 and between the bottom of the tub 2 and the
- Substance layer 5 the tub 2 is elastically deformed during displacement of the construction platform 1. Due to the elastic deformation of the trough 2, a part of the light beam directed through the trough bottom is deflected and the light sensor 7 receives a lower light intensity than in the undeformed state of the trough 2.
- Fig. 1 c shows the situation when the detachment process of the substance layer 5 from the bottom of the tub 2 is completed. There is no electromagnetic
- the construction platform 1, which contains the various substance layers 5, is lowered in order to set the desired layer thickness for the next substance layer 5 in a plane perpendicular to the bottom of the trough 2 and remains at the desired distance from the trough bottom.
- FIG. 2 schematically shows a diagram which represents the voltage U [V] measured at the light sensor 7 over the time t [s] of the preceding FIGS. 1 a to c.
- section a of the diagram the signal at the light sensor 7 of Fig. 1a is shown. It can be seen here that if the trough 2 is not elastically deformed, the light intensity of the light source 6 detected by the light sensor 7 lies in a constant target value range.
- section b it can be seen that a change in the light intensity detected by the light sensor 7 of the light source 6 and thus the measured voltage is effected by the elastic deformation of the trough 2. Due to the deformation of the trough 2, the light intensity of the light source 6 detected by the light sensor 7 increases until
- 3a shows a schematic illustration of a second embodiment of a device according to the invention in a two-dimensional sectional view.
- a flexible optical fiber 8 which guides the light beam 9 of the light source 6, arranged in the bottom of the tub 2.
- the light guide 8 is an optical waveguide, for example a glass fiber line.
- the tub 2 contains the non-dimensionally stable substance.
- the construction platform 1 is in turn arranged parallel to the bottom of the tub 2 and in a plane which is normal to the bottom of the tub 2, displaced. From the non-dimensionally stable substance 3, a substance layer 5 is generated by the electromagnetic radiation through the radiator 4. In the region of the bottom of the trough 2, a light source 6 is arranged on one side and a light sensor 7 detecting the light of the light source 6 on the opposite side, so that a deformation of the trough 2 detects a change in that detected by the light sensor 7
- Light intensity of the light source 6 causes.
- the light source 6 and / or the light sensor 7 are arranged immediately adjacent to the bottom of the tub 2.
- the light source 6 and / or the light sensor 7 are integrated in the bottom of the tub 2.
- FIG. 3 b again shows the situation when the formation of the substance layer 5 is completed by electromagnetic radiation through the radiator 4.
- Construction platform 1 moved in a normal to the bottom of the tub 2 level. Due to the emergence of the substance layer 5
- Light guide 8 also elastically deformed.
- the angle of incidence of the incident light changes, so that part of the incident light leaves the light guide 8.
- the light intensity measured at the light sensor 7 is thus lower than in the undeformed state.
- FIG. 3c again shows the situation when the detachment process of the substance layer 5 from the bottom of the tub 2 is completed. There is no electromagnetic radiation through the radiator 4. The construction platform 1 is again to the
- optical elements are provided for deflecting the light emitted by the light source
- prisms or mirrors In other not shown
- Light sensors provided and arranged such that a deformation of the trough causes a change of the light sensors detected by the light intensity of the light sources.
- the bottom of the tub itself serves as a light guide and in addition one or more optical waveguides are arranged in the bottom of the tub.
- optical elements for focusing the light emitted by the light source are provided on a light sensor, for example optical lenses.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Optics & Photonics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Plasma & Fusion (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50363/2016A AT518566B1 (de) | 2016-04-25 | 2016-04-25 | Vorrichtung zur Bildung formstabiler Objekte |
PCT/EP2017/059223 WO2017186534A1 (de) | 2016-04-25 | 2017-04-19 | Vorrichtung zur bildung formstabiler objekte |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3448662A1 true EP3448662A1 (de) | 2019-03-06 |
Family
ID=58672562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17721966.4A Withdrawn EP3448662A1 (de) | 2016-04-25 | 2017-04-19 | Vorrichtung zur bildung formstabiler objekte |
Country Status (5)
Country | Link |
---|---|
US (1) | US20190366631A1 (de) |
EP (1) | EP3448662A1 (de) |
AT (1) | AT518566B1 (de) |
CA (1) | CA3021923A1 (de) |
WO (1) | WO2017186534A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020028301A1 (en) * | 2018-08-03 | 2020-02-06 | 3D Systems, Inc. | System and method for making a three-dimensional article by additive manufacturing |
AT521717B1 (de) * | 2018-10-01 | 2021-04-15 | Sirona Dental Systems Gmbh | Vorrichtung für eine Anlage zum schichtweisen Aufbau eines Körpers |
US20220126520A1 (en) * | 2020-10-27 | 2022-04-28 | 3D Systems, Inc. | Three-Dimensional Printing System with Improved Motion and Imaging Control |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1876012A1 (de) * | 2006-07-07 | 2008-01-09 | Nederlandse Organisatie voor Toegepast-Natuuurwetenschappelijk Onderzoek TNO | Verfahren und System zur schichtweisen Herstellung eines greifbaren Gegenstandes |
EP2011631B1 (de) * | 2007-07-04 | 2012-04-18 | Envisiontec GmbH | Verfahren und Vorrichtung zum Herstellen eines dreidimensionalen Objekts |
DE102013215040B4 (de) * | 2013-07-31 | 2016-09-22 | Tangible Engineering Gmbh | Kompakte Vorrichtung zur Herstellung eines dreidimensionalen Objekts durch Verfestigen eines fotohärtenden Materials |
US9452567B2 (en) * | 2013-08-27 | 2016-09-27 | Kao-Chih Syao | Stereolithography apparatus |
US10166725B2 (en) * | 2014-09-08 | 2019-01-01 | Holo, Inc. | Three dimensional printing adhesion reduction using photoinhibition |
AT517956B1 (de) * | 2015-12-22 | 2017-06-15 | Klaus Stadlmann Dr | Verfahren zur Erzeugung eines dreidimensionalen Körpers |
-
2016
- 2016-04-25 AT ATA50363/2016A patent/AT518566B1/de active
-
2017
- 2017-04-19 US US16/095,838 patent/US20190366631A1/en not_active Abandoned
- 2017-04-19 EP EP17721966.4A patent/EP3448662A1/de not_active Withdrawn
- 2017-04-19 CA CA3021923A patent/CA3021923A1/en not_active Abandoned
- 2017-04-19 WO PCT/EP2017/059223 patent/WO2017186534A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2017186534A1 (de) | 2017-11-02 |
US20190366631A1 (en) | 2019-12-05 |
AT518566B1 (de) | 2018-09-15 |
AT518566A1 (de) | 2017-11-15 |
CA3021923A1 (en) | 2017-11-02 |
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