- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Metalized Poly-methacrylate Off-Axis Parabolic Mirrors for Terahertz Imaging Fabricated by Additive Manufacturing
摘要： Terahertz radiation sources are currently one of the most widely used non-ionizing illumination mechanisms for security applications and also find increasing utilization in quality control of commercial products. Presently, a majority of these applications rely on scanning rather than direct imaging and implicitly suffer from temporal latency due to post processing. The monetary and temporal cost associated with procuring commercially manufactured optics that are suitable for imaging leads to fundamental limitations in the ability to rapidly develop application-specific imaging modalities using terahertz sources. Herein, we show a novel method for the rapid prototyping of metallic coated poly-methacrylate parabolic reflectors fabricated by stereolithographic 3D printing. Images comparing the performance of a commercially available off-axis parabolic reflector to our metalized poly-methacrylate prototype, which was designed to be identical to the commercially available mirror, are subsequently presented. The images show that at 530 GHz it is possible to produce a metalized poly-methacrylate off-axis paraboloid whose spatial beam profile is nearly identical to that of a commercially available equivalent.
关键词： Rapid prototyping,3D printing,THz imaging
更新于2025-09-19 17:15:36
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[IEEE 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - Paris, France (2019.9.1-2019.9.6)] 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - Semiconductor quantum plasmonics
摘要： Real-time (RT) simulation is a highly reliable simulation method that is mostly based on electromagnetic transient simulation of complex systems comprising many domains. It is increasingly used in power and energy systems for both academic research and industrial applications. Due to the evolution of the computing power of RT simulators in recent years, new classes of applications and expanded fields of practice could now be addressed with RT simulation. This increase in computation power implies that models can be built more accurately and the whole simulation system gets closer to reality. This Task Force paper summarizes various applications of digital RT simulation technologies in the design, analysis, and testing of power and energy systems.
关键词： electric power circuits,distribution networks,modeling,real-time (RT) simulation,hardware-in-the-loop (HIL),rapid prototyping (RP),Applications,transmission networks,design,testing
更新于2025-09-19 17:13:59
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Selective Laser Sintering 3D Printing of Orally Disintegrating Printlets Containing Ondansetron
摘要： The aim of this work was to explore the feasibility of using selective laser sintering (SLS) 3D printing (3DP) to fabricate orodispersable printlets (ODPs) containing ondansetron. Ondansetron was first incorporated into drug‐cyclodextrin complexes and then combined with the filler mannitol. Two 3D printed formulations with different levels of mannitol were prepared and tested, and a commercial ondansetron orally disintegrating tablet (ODT) product (Vonau? Flash) was also investigated for comparison. Both 3D printed formulations disintegrated at ~15 s and released more than 90% of the drug within 5 min independent of the mannitol content; these results were comparable to those obtained with the commercial product. This work demonstrates the potential of SLS 3DP to fabricate orodispersible printlets with characteristics similar to a commercial ODT, but with the added benefit of using a manufacturing technology able to prepare medicines individualized to the patient.
关键词： additive manufacturing,printing pharmaceuticals,orally disintegrating printlets (ODPs),3D printed drug products,personalized medicines,taste masking,three‐dimensional printing,rapid prototyping,orally disintegrating tablets (ODTs)
更新于2025-09-19 17:13:59
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The Influence of Selected Selective Laser Sintering Technology Process Parameters on Stress Relaxation, Mass of Models, and Their Surface Texture Quality
摘要： The article presents the results of research on the impact of basic process parameters of selective laser sintering technology on the mass of the produced models (density of the sintered material—polyamide PA 2200), stress relaxation during compression determined in accordance with the ISO 3384 standard, and geometric surface structure parameters (SGPs). During the tests, the influence of process parameters such as the location of the models on the virtual construction platform (printing direction), the density of the energy supplied to the sintered layer of powder, and the layer thickness of the manufactured material layer was taken into account. The test results confirmed that the process parameters have a significant impact on the density of the model material (in the sintered state), the mechanical properties (stress relaxation during compression), and the quality of the surface texture (SGPs). The most favorable positioning variants of the models on the construction platform were determined. The most favorable thickness variants of the combined layers and the density value of the energy supplied to the sintered powder layer were selected, depending on the expected mass, strength, and SGP quality. In addition, it has been shown that it is possible to build models with reduced mass (>20%), while maintaining satisfactory mechanical and qualitative properties of the surface texture.
关键词： additive manufacturing technologies,GPS,rapid prototyping,SLS,3D printing,stress relaxation
更新于2025-09-19 17:13:59
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[IEEE 2020 8th International Winter Conference on Brain-Computer Interface (BCI) - Gangwon, Korea (South) (2020.2.26-2020.2.28)] 2020 8th International Winter Conference on Brain-Computer Interface (BCI) - Implementation of multi-connected single-channel functional near-infrared spectroscopy system for hyperscanning study
摘要： A drug delivery system is used for targeting drugs to specific cells. Various drug carriers, that also reduce the side effects of unbound drugs, have been introduced and commercialized in the pharmaceutical field. Among them, synthetic biodegradable polymers have received much attention attributed to their low toxicity, controllable biodegradation rates, manufacturability, and low costs. This paper reviews the salient characteristics of biodegradable polymers as drug carriers and their microfabrication methods. The reviewed microfabrication methods include laser micromachining, rapid prototyping, replication, emulsification, microfluidic fabrication, and X-ray-lithography-based methods. For these microfabrication methods, critical dimensions, feature variety, solvent compatibility, production throughput, and tooling requirements are also summarized.
关键词： poly-capro-lactone (PCL),laser micromachining,emulsification,microfluidics,poly(lactic-co-glycolic acid) (PLGA),biodegradable polymers,Drug delivery systems (DDS),rapid prototyping,replication,x-ray-lithography,microfabrication,drug carriers
更新于2025-09-19 17:13:59
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XXX. Messtechnisches Symposium || Rapid Prototyping von Dehnungsmessstreifen durch Laserbearbeitung von Hei?pr?gefolie
摘要： Durch selektive Laserbearbeitung lassen sich aus konventioneller Metall-Hei?pr?gefolie flexible, elektrisch leitf?hige Strukturen für Leiterbahnen und zur Erfassung mechanischer Dehnungen (DMS) herstellen. Das Verfahren erm?glicht es, kostengünstig und schnell individuelle Strukturen zu erzeugen. Am Beispiel einer Hei?pr?gefolie auf Goldbasis wird die Herstellung und Charakterisierung eines typischen M?anderlayouts beschrieben. Der k-Faktor liegt mit k = 2,61 im Bereich konventioneller DMS. Der Grundwiderstand zeigt eine ausgepr?gte Temperaturabh?ngigkeit von 0,64 ?/°C.
关键词： Dehnungsmessstreifen,Rapid Prototyping,Laser
更新于2025-09-16 10:30:52
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[Laser Institute of America ICALEO? 2016: 35th International Congress on Applications of Lasers & Electro-Optics - San Diego, California, USA (October 16–20, 2016)] International Congress on Applications of Lasers & Electro-Optics - Rapid prototyping based on laser cladding of cp-Ti
摘要： Commercially pure titanium (cp-Ti) and titanium alloys are successful metallic biomaterials for implants because of their biocompatibility, corrosion resistance, fatigue strength, and a relatively low elastic modulus to minimize “stress shielding” and osteopenia. Nowadays, titanium components are manufactured by conventional subtractive methods, which show a set of inconveniences: titanium has low machinability, loss of high cost material during machining, and the geometrical limitation for the shapes achieved by subtractive methods. Rapid Prototyping based on Laser Cladding is an Additive Manufacturing (AM) technique that can be applied to any material which can be melted. It can be found under different names and acronyms: Laser Consolidation (LC), Direct Laser Deposition (DLD), Laser Metal Deposition (LMD), Laser Engineering Net Shaping (LENS), etc. Rapid Prototyping based on Laser Cladding can become a solution to manufacture advanced pure titanium components customized for the final user, with new geometries and/or with enhanced microstructures and mechanical properties for a better performance. In this research work, Laser Additive Manufacturing was employed to obtain simple parts made out of commercially pure titanium. Generated parts were analyzed by Optical Microscopy (OM), Optical Profilometry (OP), Scanning Electron Microscopy (SEM), and Energy Dispersive X-Ray Spectroscopy (EDS) to study morphology, microstructure, and composition.
关键词： Titanium,cp-Ti,Additive Manufacturing,Rapid Prototyping,Laser Cladding
更新于2025-09-16 10:30:52
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Modeling Design and Rapid Prototyping Manufacture of Cream Bottle Based on Handheld Laser Scanning
摘要： Reverse Engineering (RE) and Rapid Prototyping (RP) were used for manufacturing cream bottle. Points cloud data of cream bottle was accessed by handheld laser scanner firstly. Then, points cloud data was handed by Imageware software and the three-dimensional model was formed by Solid works software. Finally, the entity model was manufacturing by RP machine. In the research, rapid prototyping was combined with reverse engineering technology, manufacturing cycle was shorten, production requirements, improve efficiency and other advantages were met.
关键词： CAD,Imageware,Reverse engineering,Solidworks,Rapid prototyping
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE 16th International Conference on Smart Cities: Improving Quality of Life Using ICT & IoT and AI (HONET-ICT) - Charlotte, NC, USA (2019.10.6-2019.10.9)] 2019 IEEE 16th International Conference on Smart Cities: Improving Quality of Life Using ICT & IoT and AI (HONET-ICT) - Fabrication of optical components with nm- to mm-scale critical features using three-dimensional direct laser writing
摘要： A powerful fabrication strategy based on three-dimensional direct laser writing for the rapid prototyping of opto-mechanical components with critical features ranging from several hundred nm to a few mm is demonstrated here. As an example, a simple optical fiber connector with optical and mechanical guides as well as integrated micro-optical elements with nano-structured surfaces is designed and fabricated. In contrast to established three-dimensional direct laser writing, two different polymers are combined in the fabrication process in order to achieve a drastic reduction in fabrication time by substantially reducing the “optical tool path”. A good agreement between the as-fabricated connector and nominal dimensions has been obtained. The developed approach allows the rapid prototyping of optomechanical components with multi-scale critical features. It is, therefore, envisioned to substantially accelerate the development cycle by integrating functional mechanical and optical elements in a single component.
关键词： hetero-3D-DLW,three-dimensional direct laser writing,opto-mechanical components,multi-scale critical features,rapid prototyping
更新于2025-09-16 10:30:52
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Maskless, rapid manufacturing of glass microfluidic devices using a picosecond pulsed laser
摘要： Conventional manufacturing of glass microfluidic devices is a complex, multi-step process that involves a combination of different fabrication techniques, typically photolithography, chemical/dry etching and thermal/anodic bonding. As a result, the process is time-consuming and expensive, in particular when developing microfluidic prototypes or even manufacturing them in low quantity. This report describes a fabrication technique in which a picosecond pulsed laser system is the only tool required to manufacture a microfluidic device from transparent glass substrates. The laser system is used for the generation of microfluidic patterns directly on glass, the drilling of inlet/outlet ports in glass covers, and the bonding of two glass plates together in order to enclose the laser-generated patterns from the top. This method enables the manufacturing of a fully-functional microfluidic device in a few hours, without using any projection masks, dangerous chemicals, and additional expensive tools, e.g., a mask writer or bonding machine. The method allows the fabrication of various types of microfluidic devices, e.g., Hele-Shaw cells and microfluidics comprising complex patterns resembling up-scaled cross-sections of realistic rock samples, suitable for the investigation of CO2 storage, water remediation and hydrocarbon recovery processes. The method also provides a route for embedding small 3D objects inside these devices.
关键词： glass microfluidic devices,laser micromachining,picosecond pulsed laser,maskless manufacturing,laser microwelding,rapid prototyping
更新于2025-09-12 10:27:22