Real-time and unambiguous visualization of a surface profile using an all-optical feedback interferometer

1999 ◽  
Author(s):  
Tomohiro Shirai ◽  
Thomas H. Barnes ◽  
T. G. Haskel
Keyword(s):  
Real Time ◽  
Optical Feedback ◽  
Surface Profile ◽  
All Optical

scholarly journals Real-time wavefront shaping through scattering media by all-optical feedback

2013 ◽  
Vol 7 (11) ◽  
pp. 919-924 ◽  
Author(s):  
Micha Nixon ◽  
Ori Katz ◽  
Eran Small ◽  
Yaron Bromberg ◽  
Asher A. Friesem ◽  
...  
Keyword(s):  
Real Time ◽  
Optical Feedback ◽  
Scattering Media ◽  
All Optical ◽  
Wavefront Shaping

Real-Time 2D Surface Profile Mapping of Biological Tissue with Force Feedback in Robot-Assisted Minimally Invasive Surgery

2015 ◽  
Vol 798 ◽  
pp. 319-323
Author(s):  
Ali Reza Hassan Beiglou ◽  
Javad Dargahi
Keyword(s):  
Minimally Invasive Surgery ◽  
Minimally Invasive ◽  
Real Time ◽  
Invasive Surgery ◽  
Strain Gauge ◽  
Force Feedback ◽  
Surface Profile ◽  
Robot Assisted ◽  
Contact Points ◽  
Force Signal

It has been more than 20 years that robot-assisted minimally invasive surgery (RMIS) has brought remarkable accuracy and dexterity for surgeons along with the decreasing trauma for the patients. In this paper a novel method of the tissue’s surface profile mapping is proposed. The tissue surface profile plays an important role for material identification during RMIS. It is shown how by integrating the force feedback into robot controller the surface profile of the tissue can be obtained with force feedback scanning. The experiment setup includes a 5 degree of freedoms (DOFs) robot which is equipped with a strain-gauge ball caster as the force feedback. Robot joint encoders signals and the captured force signal of the strain-gauge are transferred to developed surface transformation algorithm (STA). The real-time geometrical transformation process is triggered with force signal to identify contact points between the ball caster and the artificial tissue. The 2D surface profile of tissue will be mapped based on these contact points. Real-time capability of the proposed system is evaluated experimentally for the artifical tissues in a designed test rig.

All-optical real-time monitoring of air/vacuum valves in water pipeline systems using fiber Bragg gratings

2021 ◽  
Vol 44 (1) ◽  
Author(s):  
Genivaldo A. de Aquino ◽  
Yvone de F. L. De Lucca ◽  
Thiago D. Cabral ◽  
Pedro M. Lazari ◽  
André L. S. S. Martim ◽  
...  
Keyword(s):  
Real Time ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Real Time Monitoring ◽  
All Optical ◽  
Pipeline Systems ◽  
Water Pipeline

Design and Simulation on All Optical Real-Time Measurement of Transient Optical Signal

2016 ◽  
Vol 53 (1) ◽  
pp. 011202
Author(s):  
张卓宁 Zhang Zhuoning ◽  
彭其先 Peng Qixian ◽  
王竞 Wang Jing ◽  
温伟峰 Wen Weifeng ◽  
陶世兴 Tao Shixing
Keyword(s):  
Real Time ◽  
Optical Signal ◽  
Time Measurement ◽  
Real Time Measurement ◽  
All Optical

scholarly journals A Software Architecture to Mimic a Ventricular Tachycardia in Intact Murine Hearts by Means of an All-Optical Platform

2019 ◽  
Vol 2 (1) ◽  
pp. 7 ◽  
Author(s):  
Francesco Giardini ◽  
Valentina Biasci ◽  
Marina Scardigli ◽  
Francesco S. Pavone ◽  
Gil Bub ◽  
...  
Keyword(s):  
Ventricular Tachycardia ◽  
Electrical Activity ◽  
Real Time ◽  
Temporal Resolution ◽  
Technical Note ◽  
High Temporal Resolution ◽  
Excitable Cells ◽  
New Approach ◽  
Cardiac Electrical Activity ◽  
All Optical

Optogenetics is an emerging method that uses light to manipulate electrical activity in excitable cells exploiting the interaction between light and light-sensitive depolarizing ion channels, such as channelrhodopsin-2 (ChR2). Initially used in the neuroscience, it has been adopted in cardiac research where the expression of ChR2 in cardiac preparations allows optical pacing, resynchronization and defibrillation. Recently, optogenetics has been leveraged to manipulate cardiac electrical activity in the intact heart in real-time. This new approach was applied to simulate a re-entrant circuit across the ventricle. In this technical note, we describe the development and the implementation of a new software package for real-time optogenetic intervention. The package consists of a single LabVIEW program that simultaneously captures images at very high frame rates and delivers precisely timed optogenetic stimuli based on the content of the images. The software implementation guarantees closed-loop optical manipulation at high temporal resolution by processing the raw data in workstation memory. We demonstrate that this strategy allows the simulation of a ventricular tachycardia with high stability and with a negligible loss of data with a temporal resolution of up to 1 ms.

scholarly journals All-optical switching and real-time spectroscopy of soliton molecules in a few-cycle laser oscillator

2019 ◽  
Vol 205 ◽  
pp. 03005
Author(s):  
Felix Kurtz ◽  
Daniel Solli ◽  
Bahram Mali ◽  
Claus Ropers ◽  
Georg Herink
Keyword(s):  
Real Time ◽  
Bound States ◽  
Optical Switching ◽  
Laser Oscillator ◽  
All Optical ◽  
All Optical Switching ◽  
Binding Distance

Bound states of femtosecond solitons are generated and controlled in a commercial sub-10 fs Kerr-lens mode-locked ultrashort oscillator. Using real-time time-stretch interferometry, we resolve the resonance of vibrating soliton molecules and demonstrate all-optical switching between stable bound-states of different binding distance.

The use of real-time optical feedback to improve outcomes

2014 ◽  
Author(s):  
Isidro B. Magaña ◽  
Pratik Adhikari ◽  
Raghuvara B. Yendluri ◽  
Glenn P. Goodrich ◽  
Jon A. Schwartz ◽  
...  
Keyword(s):  
Real Time ◽  
Optical Feedback
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