The effect of object shape and laser beam shape on lidar system resolution

2016 ◽  
Author(s):  
Hongchang Cheng ◽  
Jingyi Wang ◽  
Jun Ke
Keyword(s):  
Laser Beam ◽  
Lidar System ◽  
Beam Shape ◽  
Object Shape

ORIENTATING MANIPULATION OF CYLINDRICAL PARTICLES WITH OPTICAL TWEEZERS

2008 ◽  
Vol 17 (04) ◽  
pp. 387-394 ◽  
Author(s):  
XIUDONG SUN ◽  
XUECONG LI ◽  
JIANLONG ZHANG
Keyword(s):  
Escherichia Coli ◽  
Carbon Nanotubes ◽  
Laser Beam ◽  
Optical Tweezers ◽  
Optical Trap ◽  
Polarization Direction ◽  
Beam Shape ◽  
E Coli ◽  
Potential Applications ◽  
Cylindrical Particles

Orientating manipulations of cylindrical particles were performed by optical tweezers. Vertical and horizontal manipulations of Escherichia coli (E. coli) were carried out by changing the trapping depth and the focused laser beam shape. It was found that carbon nanotubes bundles (CNTBs) could be rotated in the linear polarized optical trap until it orientated its long axis along the linear polarization direction of the laser beam. However, E.coli could not be orientated in this way. Corresponding mechanisms were discussed based on the anisomeric electric characters of CNTBs. These orientation technologies of cylindrical objects with optical trap have potential applications in assembling nano-electric devices.

Effect of laser beam shape parameters on photothermal deflection densitometers

1984 ◽  
Vol 56 (9) ◽  
pp. 1674-1677 ◽  
Author(s):  
Tsuey Ing. Chen ◽  
Michael D. Morris
Keyword(s):  
Laser Beam ◽  
Shape Parameters ◽  
Beam Shape ◽  
Photothermal Deflection

Dynamic control of laser beam shape for heat treatment

2018 ◽  
Vol 30 (3) ◽  
pp. 032507 ◽  
Author(s):  
Paula Sancho ◽  
M. Angeles Montealegre ◽  
Jesús Dominguez ◽  
Piera Alvarez ◽  
Juan Isaza
Keyword(s):  
Heat Treatment ◽  
Laser Beam ◽  
Dynamic Control ◽  
Beam Shape

Effect of M2Factor of Laser Beam for a Non-Coaxial Lidar System

2008 ◽  
Vol 28 (9) ◽  
pp. 1649-1654 ◽  
Author(s):  
高飞 Gao Fei ◽  
华灯鑫 Hua Dengxin ◽  
吴敏 Wu Min ◽  
毛建东 Mao Jiandong ◽  
周毅 Zhou Yi
Keyword(s):  
Laser Beam ◽  
Lidar System

Influence of Excimer Laser Beam Shape on Poly-Si Crystallisation

2004 ◽  
Vol 43 (8A) ◽  
pp. 5114-5121 ◽  
Author(s):  
S. D. Brotherton ◽  
D. J. McCulloch ◽  
J. P. Gowers
Keyword(s):  
Laser Beam ◽  
Excimer Laser ◽  
Beam Shape

Linear-core-array optical fiber based laser beam shape convertor

2011 ◽  
Author(s):  
Libo Yuan ◽  
Xiaoliang Zhu ◽  
Ai Zhou ◽  
Qiang Dai ◽  
Fengjun Tian
Keyword(s):  
Laser Beam ◽  
Optical Fiber ◽  
Beam Shape

Study on Macroscopic Morphology and Microstructure of Single Ni60 Laser Clad Tracks Prepared Using a Variable Laser Beam Shaper

2014 ◽  
Vol 887-888 ◽  
pp. 1091-1095
Author(s):  
You Zheng Sun ◽  
Si Yu Wang ◽  
Daniel Wellburn ◽  
Shuo Shang ◽  
Jian Cheng ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Laser Beam ◽  
Cross Section ◽  
Steel Industry ◽  
Alloy Powder ◽  
Low Energy ◽  
Beam Shape ◽  
Cross Section Area ◽  
Section Area ◽  
Density Ratios

The objective of the present study was to find the influence of laser beam shape on macroscopic morphology and microstructure of single Ni60 laser clad tracks. Laser cladding of Ni60 alloy powder can be used to manufacture and remanufacture backup rollers for the steel industry. Controlling temperature distribution can assist with achieving favorable macroscopic morphology and microstructure. Five different beam profiles were used in our experiment to prepare clad tracks. The beam profiles varied in terms of the ratio of energy densities between the internal and external parts. The macroscopic morphology and microstructure was tested using SEM. The study founds decreasing the ratio is possible to achieve wider clad tracks with a larger cross section area. It was found that microstructure in upper region tended to form net-like dendrite microstructure at low energy density ratios.

scholarly journals Modeling of the laser beam shape for high-power applications

2018 ◽  
Vol 57 (04) ◽  
pp. 1 ◽  
Author(s):  
Jan K. Jabczyński ◽  
Mateusz Kaskow ◽  
Lukasz Gorajek ◽  
Krzysztof Kopczyński ◽  
Waldemar Zendzian
Keyword(s):  
Laser Beam ◽  
High Power ◽  
Beam Shape
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