A Method for Rotation of Spherical Shells by Any Law with a Small Center Beating.

1994 ◽  
Vol 372 ◽  
Author(s):  
A. V. Veselov ◽  
A. G. Golubinskij ◽  
A. V. Zaharov ◽  
A. V. Malkov
Keyword(s):  
High Speed ◽  
High Accuracy ◽  
Spherical Shells ◽  
Shell Surface ◽  
Accuracy Of Measurements ◽  
Thickness Variations ◽  
Automated Installation ◽  
Wide Access

AbstractTo provide control of the whole surface the shell should be rotated. But the shell center beating within 1 μm gives thickness variations from 90 to 1200 Å. For high accuracy of measurements it is necessary to decrease the shell center beating upon rotation down to 0.1–0.2 μm. This problem can be solved using the proposed method for rotation of shells.Several units for rotation of shells have been developed and investigated. Those laws of rotation have been selected which allow to inspect the whole surface of the sell.Obvious advantages of the proposed method are the following: ease of installation and removal of the shell in the unit, automated installation of the shell in the desired position, high speed of rotation, small beating of the shell center during its rotation, wide access to the shell surface to be controlled, any required law of the shell rotation.

scholarly journals Multi-Touch Interaction Generation Device by Spatiotemporally Switching Electrodes

Electronics ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1475
Author(s):  
Masahiro Okamoto ◽  
Kazuya Murao
Keyword(s):  
High Speed ◽  
High Accuracy ◽  
Conductive Ink ◽  
Control Board ◽  
Touch Panel ◽  
Electrode Size ◽  
Touch Input ◽  
Touch Interaction ◽  
Multiple Electrodes ◽  
Touch Panels

With the spread of devices equipped with touch panels, such as smartphones, tablets, and laptops, the opportunity for users to perform touch interaction has increased. In this paper, we constructed a device that generates multi-touch interactions to realize high-speed, continuous, or hands-free touch input on a touch panel. The proposed device consists of an electrode sheet printed with multiple electrodes using conductive ink and a voltage control board, and generates eight multi-touch interactions: tap, double-tap, long-press, press-and-tap, swipe, pinch-in, pinch-out, and rotation, by changing the capacitance of the touch panel in time and space. In preliminary experiments, we investigated the appropriate electrode size and spacing for generating multi-touch interactions, and then implemented the device. From the evaluation experiments, it was confirmed that the proposed device can generate multi-touch interactions with high accuracy. As a result, tap, press-and-tap, swipe, pinch-in, pinch-out, and rotation can be generated with a success rate of 100%. It was confirmed that all the multi-touch interactions evaluated by the proposed device could be generated with high accuracy and acceptable speed.

scholarly journals PMD Study & Measurement – Fixed Analyzer Method

2015 ◽  
Vol 11 (4) ◽  
pp. 199 ◽  
Author(s):  
Rastislav Motuz ◽  
Petr Munster ◽  
Miloslav Filka
Keyword(s):  
Optical Networks ◽  
High Speed ◽  
Polarization Mode Dispersion ◽  
Main Attention ◽  
Laboratory Equipment ◽  
Limit Values ◽  
Mode Dispersion ◽  
Compensation Methods ◽  
Accuracy Of Measurements ◽  
Modular Platform

The paper theoretically describes Polarization Mode Dispersion (PMD) which is important parameter in high-speed optical networks. Furthermore, compensation methods and measurement principles are presented. Main attention is given to Fixed Analyzer (FA) method that uses common research laboratory equipment in setup. We performed practical measurement of the PMD by using Optical Spectrum Analyzer (OSA) Anritsu MS9740A, in-line polarizers and a polarization controller. To verify the accuracy of measurements Reference Measurement (RM) using a modular platform EXFO FTB-200 in combination with CD/PMD module EXFO FTB-5700 was performed. Moreover, PMD etalons with defined values of delay was used for measurement. All results were evaluated in comparison with defined limit values.

High-Speed and High-Accuracy Volume Holographic Optical Correlator

2014 ◽  
Vol 41 (2) ◽  
pp. 0209005
Author(s):  
易瑶 Yi Yao ◽  
曹良才 Cao Liangcai ◽  
郑天祥 Zheng Tianxiang ◽  
赵瑱 Zhao Tian ◽  
何庆声 He Qingsheng ◽  
...  
Keyword(s):  
High Speed ◽  
High Accuracy ◽  
Optical Correlator
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