Theoretical Analysis and Basic Experiments for the 3D Displacement Measurement Using Ring-Shaped Laser Beam

2005 ◽  
pp. 295-300
Author(s):  
S. Usuki ◽  
Kazuyuki Enami ◽  
M. Hiraki ◽  
S. Takahashi ◽  
Kiyoshi Takamasu
Keyword(s):  
Theoretical Analysis ◽  
Laser Beam ◽  
Displacement Measurement ◽  
Basic Experiments

Theoretical Analysis and Basic Experiments for the 3D Displacement Measurement Using Ring-Shaped Laser Beam

2005 ◽  
Vol 295-296 ◽  
pp. 295-300
Author(s):  
S. Usuki ◽  
Kazuyuki Enami ◽  
M. Hiraki ◽  
S. Takahashi ◽  
Kiyoshi Takamasu
Keyword(s):  
Theoretical Analysis ◽  
Laser Beam ◽  
Optical System ◽  
High Sensitivity ◽  
Displacement Measurement ◽  
Contact Method ◽  
New Ideas ◽  
3D Positioning ◽  
The One ◽  
Basic Experiments

For flexible 3D positioning of a complex 3D mechanism, it is needed to measure 3D displacement of the end-effecter of the mechanism in high precision and by non-contact method. It was common to use plural sensors or scales together to measure the 3D displacement. However, it is difficult to calibrate the sensitivities of the plural sensors or scales. A novel 3D displacement measurement is proposed using an optical system in which lens focuses are collected at the center of the sphere, which has been used for the radius measurement of the sphere. Instead of facing in the XY direction that has high sensitivity, new ideas are necessary for the measurement in the Z direction of the optics where focuses are collected at the center of the sphere. The displacement in the XY direction and the one in the Z direction can be measured at the same time by using a ring-shaped laser beam instead of a simple ray.

scholarly journals Three Dimensional Displacement Measurement Using Ring Beam-Theoretical Analysis and Basic Experiments-

2003 ◽  
Vol 69 (12) ◽  
pp. 1764-1768 ◽  
Author(s):  
Kazuhiro ENAMI ◽  
Shin USUKI ◽  
Masahiko HIRAKI ◽  
Satoru TAKAHASHI ◽  
Kiyoshi TAKAMASU ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Three Dimensional ◽  
Displacement Measurement ◽  
Basic Experiments

Basic experiments of laser beam correction by adaptive optics microscope for the accurate manipulation of biological tissues

2017 ◽  
Author(s):  
Masayuki Hattori ◽  
Yosuke Tamada ◽  
Shin Oya ◽  
Yutaka Hayano ◽  
Yasuhiro Kamei
Keyword(s):  
Laser Beam ◽  
Adaptive Optics ◽  
Biological Tissues ◽  
Basic Experiments

Implementation and evaluation of a laser scan localization scheme for sensor nodes

Sensor Review ◽  
2020 ◽  
Vol 40 (1) ◽  
pp. 97-106
Author(s):  
Shugong Wei
Keyword(s):  
Theoretical Analysis ◽  
Laser Beam ◽  
Design Methodology ◽  
Sensor Nodes ◽  
Content Type ◽  
Localization Accuracy ◽  
Localization System ◽  
Localization Scheme ◽  
Experimental Apparatus ◽  
Sensor Locations

Purpose In this paper, an experimental apparatus was designed and subsequent theoretical analysis and simulations were conducted on the effectiveness and advantages of a novel laser beam scan localization (BLS) system. Design/methodology/approach The system used a moving location assistant (LA) with a laser beam, through which the deployed area was scanned. The laser beam sent identity documents (IDs) to unknown nodes to obtain the sensor locations. Findings The results showed that the system yielded significant benefits compared with other localization methods, and a high localization accuracy could be achieved without the aid of expensive hardware on the sensor nodes. Furthermore, four positioning mode features in this localization system were realized and compared. Originality/value In this paper, an experimental apparatus was designed and subsequent theoretical analysis and simulations were conducted on the effectiveness and advantages of a novel laser BLS system. The system used a moving LA with a laser beam, through which the deployed area was scanned. The laser beam sent IDs to unknown nodes to obtain the sensor locations.

Controlling Weak Laser Beam to Nonlinear Focusing Based on Induced Nonlinear Effects

2013 ◽  
Vol 710 ◽  
pp. 385-389
Author(s):  
Feng Lin ◽  
Chao Tan ◽  
Yuan Zhou ◽  
Xi Quan Fu
Keyword(s):  
Analytical Solution ◽  
Theoretical Analysis ◽  
Laser Beam ◽  
High Power ◽  
Exact Analytical Solution ◽  
Nonlinear Effects ◽  
Pump Laser ◽  
High Power Laser ◽  
Power Laser ◽  
Nonlinear Focusing

In this paper, we theoretically and experimentally investigated the controllable nonlinear focusing of the weak laser based on the induced nonlinear effects. We obtained an exact analytical solution to the weak laser beam when the high power laser beam is unchangeable during propagation. We also discussed the different pump parameters how to influence the focusing and experimentally partly verify the theoretical analysis. The results show that the focusing of weaker beam was jointly controlled by the power, width and wavelength of pump laser.

Effects of Key Parameters on the Performance of a New In-Process Optical Measurement Method

2005 ◽  
Vol 295-296 ◽  
pp. 405-410 ◽  
Author(s):  
Z. Tao ◽  
Y. Gao
Keyword(s):  
Measurement Error ◽  
Theoretical Analysis ◽  
Laser Beam ◽  
Measurement Method ◽  
Optical Measurement ◽  
New Method ◽  
Acceptable Range ◽  
Measuring Surface ◽  
Surface Profiles ◽  
Optical Measurement Method

A new in-process optical measurement method has been developed for measuring surface profiles of workpieces under the coolant condition. In this method, a laser beam passes through two additional layers. This paper presents an error analysis for the new method. The effects of key parameters on performance of the new method are examined. The theoretical analysis and experimental results show that the measurement error in this new method can be controlled within an acceptable range.

Influence of Beam Polarizations on Evaporative Laser Cutting Nonmetallic Materials within High Absorptance

2009 ◽  
Vol 626-627 ◽  
pp. 363-368
Author(s):  
Xiao Zhu Xie ◽  
J.G. Lu ◽  
Xin Wei ◽  
W. Hu
Keyword(s):  
Theoretical Analysis ◽  
Laser Beam ◽  
Ray Tracing ◽  
Laser Cutting ◽  
Three Dimensional ◽  
Coupling Model ◽  
Experimental Results ◽  
Multiple Reflections ◽  
Set Up ◽  
Tracing Method

The three dimensional (3D) coupling model is set up for analyzing the energy reflection and absorption on the kerf using ray tracing method after the laser beam cutting nonmetallic materials with high absorptance through multiple reflections. The laser beam characterized by focused gauss beam and fresnel absorption on the kerf are taken into account. The influences of the polarization on the absorbed intensity both in the front and the two walls are also discussed. Results indicate the differences of absorptive intensity among the three polarized lights are relatively small compared to metal. Thus, the polarization has little effects on the kerf of nonmetallic materials with high absorptance. The experimental results also agree well with the theoretical analysis.

Theoretical Analysis of Transient Stimulated Concentration Scattering in a Binary Mixture of Nonabsorbing Gases

1975 ◽  
Vol 53 (8) ◽  
pp. 761-769 ◽  
Author(s):  
S. S. Rangnekar ◽  
R. H. Enns
Keyword(s):  
Theoretical Analysis ◽  
Binary Mixture ◽  
Laser Beam ◽  
Partial Pressure ◽  
Small Signal

A small signal, small amplification calculation of the transient gain relevant to the stimulated concentration scattering of a laser beam in a binary mixture of nonabsorbing gases is presented. The results are applied to the He–Xe mixture with Xe at a partial pressure of 40 atm and varying He concentrations, and experimentally observable features of the transient gain are predicted.

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