Advanced 3D-printed EAP actuator applied to high precision large optical-quality surface fabrication: first results

2020 ◽  
Author(s):  
Kritsadi Thetpraphi ◽  
Gil Moretto ◽  
Jeffrey R. Kuhn ◽  
Pierre-Jean Cottinet ◽  
Minh-Quyen Le ◽  
...  
Keyword(s):  
High Precision ◽  
Optical Quality ◽  
First Results ◽  
3D Printed ◽  
Surface Fabrication ◽  
Quality Surface

High‐precision X‐ray spectroscopy of Fe ions in an EBIT using a micro‐calorimeter detector: First results

2019 ◽  
Vol 49 (1) ◽  
pp. 184-187
Author(s):  
Marc O. Herdrich ◽  
Andreas Fleischmann ◽  
Daniel Hengstler ◽  
Steffen Allgeier ◽  
Christian Enss ◽  
...  
Keyword(s):  
High Precision ◽  
X Ray ◽  
First Results ◽  
Fe Ions ◽  
Micro Calorimeter

scholarly journals Microtomography data processing methods for cryogenic target characterization

1999 ◽  
Vol 17 (4) ◽  
pp. 729-740 ◽  
Author(s):  
I.V. ALEKSANDROVA ◽  
E.R. KORESHEVA ◽  
I.E. OSIPOV ◽  
V.I. GOLOV ◽  
V.I. CHTCHERBAKOV
Keyword(s):  
Data Processing ◽  
High Precision ◽  
Processing Methods ◽  
Cryogenic Target ◽  
First Results ◽  
Target Characterization ◽  
Data Processing Methods

Determining the cryogenic target parameters with high precision calls for the development of a new direction in the area of target characterization based on microtomography methods of data processing. In this report we present our first results in this area.

scholarly journals Wearable Augmented Reality Platform for Aiding Complex 3D Trajectory Tracing

Sensors ◽  
2020 ◽  
Vol 20 (6) ◽  
pp. 1612 ◽  
Author(s):  
Sara Condino ◽  
Benish Fida ◽  
Marina Carbone ◽  
Laura Cercenelli ◽  
Giovanni Badiali ◽  
...  
Keyword(s):  
Augmented Reality ◽  
High Precision ◽  
Ad Hoc ◽  
User Study ◽  
Peripersonal Space ◽  
Planar Structures ◽  
3D Printed ◽  
Quantitative Results ◽  
Manual Tasks ◽  
Wearable Augmented Reality

Augmented reality (AR) Head-Mounted Displays (HMDs) are emerging as the most efficient output medium to support manual tasks performed under direct vision. Despite that, technological and human-factor limitations still hinder their routine use for aiding high-precision manual tasks in the peripersonal space. To overcome such limitations, in this work, we show the results of a user study aimed to validate qualitatively and quantitatively a recently developed AR platform specifically conceived for guiding complex 3D trajectory tracing tasks. The AR platform comprises a new-concept AR video see-through (VST) HMD and a dedicated software framework for the effective deployment of the AR application. In the experiments, the subjects were asked to perform 3D trajectory tracing tasks on 3D-printed replica of planar structures or more elaborated bony anatomies. The accuracy of the trajectories traced by the subjects was evaluated by using templates designed ad hoc to match the surface of the phantoms. The quantitative results suggest that the AR platform could be used to guide high-precision tasks: on average more than 94% of the traced trajectories stayed within an error margin lower than 1 mm. The results confirm that the proposed AR platform will boost the profitable adoption of AR HMDs to guide high precision manual tasks in the peripersonal space.

scholarly journals First results of a high precision mass measurement program for very short-lived nuclides

2002 ◽  
Vol 701 (1-4) ◽  
pp. 184-187 ◽  
Author(s):  
C. Toader ◽  
C. Monsanglant ◽  
G. Audi ◽  
G. Conreur ◽  
H. Doubre ◽  
...  
Keyword(s):  
High Precision ◽  
Mass Measurement ◽  
First Results ◽  
Precision Mass Measurement

First Determination of the Proton's Weak Charge

2015 ◽  
Vol 8 (3) ◽  
Author(s):  
Shelley A. Page
Keyword(s):  
Standard Model ◽  
High Precision ◽  
Standard Model Prediction ◽  
Data Set ◽  
Weak Charge ◽  
Newport News ◽  
The Standard Model ◽  
First Results ◽  
First Time

The weak charge of the proton has been determined for the first time via a high precision electron-proton scattering experiment, Qweak, carried out at Jefferson Laboratory (JLab) in Newport News, USA. The weak charge is a basic property in subatomic physics, analogous to electric charge. The Standard Model makes a prediction for the weak charges of protons and other particles. First results described here are based on an initial 4% of the data set reported in 20131, with the ultimate goal of the experiment being a high precision Standard Model test conducted with the full Qweak data set. These initial results are consistent with the Standard Model prediction; they serve as an important first determination of the proton’s weak charge and a proof of principle that the ultimate goals are within reach.

Super Polishing Behaviour Investigation of Stainless Steel Optical Lens Moulding Inserts

2009 ◽  
Vol 404 ◽  
pp. 97-102
Author(s):  
Kui Liu ◽  
S.T. Ng ◽  
K.C. Shaw ◽  
G.C. Lim
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Surface Quality ◽  
Optical Quality ◽  
Polishing Process ◽  
Optical Lens ◽  
Fine Diamond ◽  
Diamond Paste ◽  
Quality Surface

Super polishing experiments were carried out to investigate the effects of polishing parameters on surface quality of stainless steel lens moulding inserts, and to optimize polishing conditions. Experimental results indicated that optical quality surface of stainless steel lens moulding inserts can be achieved through a two-step polishing process: fast polishing with a soft wood head and coarse diamond paste, and fine polishing with a nylon-covered steel ball head and fine diamond paste. A diameter of 20 mm stainless steel lens moulding insert with a surface roughness Ra of 7.6 nm has been successfully achieved using the two-step super polishing process.

Ultra-Precision Cutting of Brittle Materials with Ultrasonic Vibrated Diamond Tool

2006 ◽  
Vol 532-533 ◽  
pp. 169-172 ◽  
Author(s):  
Chun Xiang Ma ◽  
Eiji Shamoto ◽  
Li Ming Xu ◽  
Nan Liu ◽  
T. Moriwaki
Keyword(s):  
Diamond Tool ◽  
Brittle Materials ◽  
Optical Quality ◽  
Depth Of Cut ◽  
Critical Depth ◽  
Machined Surface ◽  
Ductile Cutting ◽  
Ultra Precision ◽  
Critical Depth Of Cut ◽  
Quality Surface

The influence of the ultrasonic vibrated diamond tool on the transition of ductile cutting to brittle cutting of the glasses is investigated by facing turning. It is understood that the critical depth of cut for the ductile cutting of the brittle materials is increased obviously by the ultrasonic vibrated diamond tool. The optical quality surface of the glasses is obtained, the surface roughness of which is less than0.03m. Finally, the relation between the roughness of machined surface and the cutting distance is studied experimentally.

scholarly journals 3D‐Printed Strong Dental Crown with Multi‐Scale Ordered Architecture, High‐Precision, and Bioactivity

2021 ◽  
pp. 2104001
Author(s):  
Menglu Zhao ◽  
Danlei Yang ◽  
Suna Fan ◽  
Xiang Yao ◽  
Jiexin Wang ◽  
...  
Keyword(s):  
High Precision ◽  
Multi Scale ◽  
3D Printed ◽  
Dental Crown

scholarly journals Flexible distillation test rig on a laboratory scale for characterization of additively manufactured packings

2021 ◽  
Author(s):  
Johannes Neukäufer ◽  
Nadin Sarajlic ◽  
Harald Klein ◽  
Sebastian Rehfeldt ◽  
Heiko Hallmann ◽  
...  
Keyword(s):  
Process Development ◽  
Separation Efficiency ◽  
Packed Column ◽  
Laboratory Scale ◽  
Test Rig ◽  
Laboratory Equipment ◽  
Column Wall ◽  
First Results ◽  
3D Printed ◽  
Scale Test

Additive manufacturing is increasingly being used to develop innovative packings for absorption and desorption columns. Since distillation has not been in focus so far, this paper aims to fill this gap. The objective is to obtain a miniaturized 3D printed packed column with optimized properties in terms of scalability and reproducibility, which increases process development efficiency. For this purpose, a flexible laboratory scale test rig is presented combining standard laboratory equipment with 3D printed components such as innovative multifunctional trays or the column wall with packing. The test rig offers a particularly wide operating range (F=0.15 Pa…1.0 Pa) for column diameters between 20 mm and 50 mm. First results regarding the time to reach steady-state, operational stability and separation efficiency measurements are presented using a 3D printable version of the Rombopak 9M. Currently, innovative packings are being characterized, which should exhibit a optimized bevavior regarding scalability, reproducibility and separation efficiency.

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