Generation of centi-meter scale twisted polymer fiber by high-order Bessel beam irradiation (Conference Presentation)

2019 ◽  
Author(s):  
Junhyung Lee ◽  
Yoshihiko Arita ◽  
Reimon Matsuo ◽  
Haruki Kawaguchi ◽  
Katsuhiko Miyamoto ◽  
...  
Keyword(s):  
Bessel Beam ◽  
High Order ◽  
Polymer Fiber ◽  
Beam Irradiation

Influence of Off-Axis Astigmatism on High Order Bessel Beam

2017 ◽  
Vol 37 (8) ◽  
pp. 0826002
Author(s):  
胡 润 Hu Run ◽  
吴逢铁 Wu Fengtie ◽  
朱清智 Zhu Qingzhi ◽  
杨艳飞 Yang Yanfei
Keyword(s):  
Bessel Beam ◽  
High Order

scholarly journals Generating Bessel beams with broad depth-of-field by using phase-only acoustic holograms

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Sergio Jiménez-Gambín ◽  
Noé Jiménez ◽  
José M. Benlloch ◽  
Francisco Camarena
Keyword(s):  
Field Distribution ◽  
Focal Length ◽  
Bessel Beam ◽  
Transverse Field ◽  
High Order ◽  
Depth Of Field ◽  
Uniform Field ◽  
Axial Distribution ◽  
Bessel Beams ◽  
Wide Range

AbstractWe report zero-th and high-order acoustic Bessel beams with broad depth-of-field generated using acoustic holograms. While the transverse field distribution of Bessel beams generated using traditional passive methods is correctly described by a Bessel function, these methods present a common drawback: the axial distribution of the field is not constant, as required for ideal Bessel beams. In this work, we experimentally, numerically and theoretically report acoustic truncated Bessel beams of flat-intensity along their axis in the ultrasound regime using phase-only holograms. In particular, the beams present a uniform field distribution showing an elongated focal length of about 40 wavelengths, while the transverse width of the beam remains smaller than 0.7 wavelengths. The proposed acoustic holograms were compared with 3D-printed fraxicons, a blazed version of axicons. The performance of both phase-only holograms and fraxicons is studied and we found that both lenses produce Bessel beams in a wide range of frequencies. In addition, high-order Bessel beam were generated. We report first order Bessel beams that show a clear phase dislocation along their axis and a vortex with single topological charge. The proposed method may have potential applications in ultrasonic imaging, biomedical ultrasound and particle manipulation applications using passive lenses.

scholarly journals Scattering of Plasma Anisotropic Spherical Particle Incident by a High-order Bessel Beam

2015 ◽  
Vol 102 ◽  
pp. 167-173
Author(s):  
Tan Qu ◽  
Zhensen Wu ◽  
Qingchao Shang ◽  
Zhengjun Li
Keyword(s):  
Spherical Particle ◽  
Bessel Beam ◽  
High Order

Application of stereomicroscope and CCD imaging system to spot size measurement of high-order Bessel beam

2014 ◽  
Vol 26 (11) ◽  
pp. 111006
Author(s):  
陈姿言 Chen Ziyan ◽  
吴逢铁 Wu Fengtie ◽  
何西 He Xi ◽  
沈栋辉 Shen Donghui
Keyword(s):  
Imaging System ◽  
Bessel Beam ◽  
Spot Size ◽  
High Order ◽  
Size Measurement ◽  
Ccd Imaging
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