Article
Optics
Reina Yoshizaki, Yusuke Ito, Kazuma Ogasawara, Akihiro Shibata, Ikuo Nagasawa, Tomokazu Sano, Keisuke Nagato, Naohiko Sugita
Summary: This study proposes a method for parallel laser processing using a spatial light modulator, successfully fabricating high-aspect-ratio microholes on a glass substrate. By investigating control parameters and laser irradiation conditions, the processing efficiency is further improved, and it is expected that parallel processing of more holes and depth control of each hole can be achieved in the future.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Sebastian Linss, Dirk Michaelis, Uwe D. Zeitner
Summary: A novel method for simulating the farfield of large-area diffractive optical elements (DOEs), particularly computer-generated holograms (CGHs), with lateral feature sizes in the wavelength range, is developed using a machine learning approach. The method predicts the optical function based on geometry parameters and achieves high consistency with results from rigorous methods.
Article
Optics
Christian Lutz, Simon Schwarz, Jan Marx, Cemal Esen, Ralf Hellmann
Summary: We present an optical setup that combines a refractive axicon and a spatial light modulator to generate multi-Bessel beam profiles. Bessel beams have unique beam profiles, making them advantageous for micro drilling and internal volume processing of transparent materials. Our concept utilizes the dynamic possibilities of beam splitting using a spatial light modulator and the benefits of Bessel beams, enabling efficient multi-Bessel beam processing. We also demonstrate the applicability of this setup for perforating thin metal foils through micro drilling.
Article
Optics
Sam R. McArthur, Robert R. Thomson, Calum A. Ross
Summary: In this paper, a parameter-space investigation on ultrafast-laser-induced selective chemical etching is conducted. The results show that there is an influence on focus elongation and etching selectivity, and high-throughput laser writing with controllable depth-of-focus is successfully demonstrated.
Article
Optics
Ruijian Li, Yuan Ren, Tong Liu, Chen Wang, Zhengliang Liu, Jie Zhao, Rusheng Sun, Ziyang Wang
Summary: This paper solves the limitations of the spatial light modulator (SLM) screen resolution and the encoding algorithm in generating large topological charge vortex beams through hardware and algorithm improvements. Experimental results demonstrate the successful generation of Laguerre-Gaussian (LG) beams with topological charges up to 1200 and 1400, setting a new benchmark for precise measurement, sensing, and communication applications.
CHINESE OPTICS LETTERS
(2022)
Article
Optics
Joanna Starobrat, Szymon Fiderkiewicz, Andrzej Kolodziejczyk, Maciej Sypek, Romuald Beck, Krystian Pavlov, Mateusz Slowikowski, Adam Kowalczyk, Jaroslaw Suszek, Michal Makowski
Summary: The holographic technology of spatial light modulators with attached apodizing masks can suppress image duplicates in the simplest optical setup, leading to better uniformity in off-axis projections and a limited number of perceived duplicates.
Article
Physics, Multidisciplinary
Xiaoting Huang, Zehong Chang, Yuanyuan Zhao, Yunlong Wang, Xindong Zhu, Pei Zhang
Summary: This paper proposes a new efficient optical device, spiral axicons, for generating anomalous vortex beams (AVBs). The theoretical analysis and experimental verification of the spiral axicon demonstrate its performance in generating AVBs, offering a new method for their application in various fields.
FRONTIERS IN PHYSICS
(2022)
Article
Optics
Lijiao Guo, Zhiqing Feng, Yating Fu, Changjun Min
Summary: In this paper, a new approach for generating a vector beams array and dynamically manipulating the polarization state of the beam array is proposed based on a stable interferometric arrangement with a single reflective SLM. The experimental results demonstrate excellent agreement with the theoretical predictions, showing the system's capability in generating and controlling vector beams arrays with different polarization states. The system has great potential in various applications such as laser processing, optical trapping, and optical communications.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
ShiNa Tao, ZhiXiong Shen, HongGuan Yu, HuaCai Wang, ShiJun Ge, Wei Hu
Summary: A spatial terahertz wave modulator based on a liquid-crystal-integrated metadevice is proposed, which allows for dynamic reconfiguration and modulation of terahertz waves.
Article
Polymer Science
Taihui Wu, Jianshe Ma, Chengchen Wang, Haibei Wang, Liangcai Cao, Ping Su
Summary: The study presents an optical encryption method based on computer-generated holograms printing of photopolymer. Experimental results show that large-size encrypted QR code and miniature keys can be printed in photopolymers, with advantages of high-density storage, high speed, large fault tolerance, and anti-peeping, suggesting good application prospects in optical encryption.
Article
Computer Science, Hardware & Architecture
Yang Wu, Xiangli Lei, Jun Wang, Ni Chen
Summary: Holographic display is an ideal method for 3D display, providing a realistic stereo perception for augmented reality prototypes without complex optical devices. However, generating high-quality holographic reconstructed images quickly and accurately has been a challenge. This study proposes a first-order optimization algorithm using the conjugate gradient direction to update phase parameters, which outperforms the widely used stochastic gradient method and the wirtinger holography method in terms of faster optimization with the same quality metrics.
Article
Chemistry, Multidisciplinary
Tomoyoshi Shimobaba, Shuhei Katsuyama, Takashi Nishitsuji, Ikuo Hoshi, Harutaka Shiomi, Fan Wang, Takashi Kakue, Naoki Takada, Tomoyoshi Ito
Summary: This study proposes a method to generate holograms with different motion parallax from existing ones without re-rendering 3D scenes and re-calculating holograms, using Fourier band-pass filtering and trigonometric functions to simplify computational processes.
APPLIED SCIENCES-BASEL
(2021)
Article
Optics
Zhongsheng Zhai, Qinyang Li, Xuan He, Qinghua Lv, Wei Feng, Zhen Zeng, Xuanze Wang
Summary: This paper proposes an optimized iterative algorithm for high-quality holographic imaging across multiple planes using the angular spectrum method (ASM). By utilizing constraint factors and variable factors, the proposed method effectively improves the overall quality of different planes.
Review
Chemistry, Multidisciplinary
Evgenii Y. Zlokazov, Vasilii V. Kolyuchkin, Dmitrii S. Lushnikov, Andrei V. Smirnov
Summary: The article discusses the use of computer-generated holograms (CGH) in security printing, particularly focusing on creating informative memory marks for automatic information retrieval in identification, copyrighting, and authentication control. It provides an overview of the theoretical basics and applications of CGH and delves into specific technical solutions like printed holograms, smart verification, and holomemory. The article presents interaction schemes between security printing manufacturers, citizens as potential consumers, and regulatory government agencies.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Jung-Ping Liu, Yu-Chih Lin, Shuming Jiao, Ting-Chung Poon
Summary: Binary computer-generated holograms often have serious speckle noise, which can be reduced through intensity accumulation. Adding enough randomness to CGHs can help average out speckle noise. Research shows that random phase and random down-sampling can produce equivalent randomness, and it is not recommended to use iterative calculations for intensity accumulation displays.
APPLIED SCIENCES-BASEL
(2021)
Article
Optics
Zheng Kuang, Jiangning Li, Stuart Edwardson, Walter Perrie, Dun Liu, Geoff Dearden
OPTICS AND LASERS IN ENGINEERING
(2015)
Article
Optics
J. Ouyang, W. Perrie, O. J. Allegre, T. Heil, Y. Jin, E. Fearon, D. Eckford, S. P. Edwardson, G. Dearden
Article
Energy & Fuels
Alejandro Sanchez Lafuente, Stuart Edwardson
INTERNATIONAL JOURNAL OF OIL GAS AND COAL TECHNOLOGY
(2016)
Article
Multidisciplinary Sciences
Diego Coglitore, Stuart P. Edwardson, Peter Macko, Eann A. Patterson, Maurice Whelan
ROYAL SOCIETY OPEN SCIENCE
(2017)
Article
Physics, Applied
G. Zhu, D. Whitehead, W. Perrie, O. J. Allegre, V. Olle, Q. Li, Y. Tang, K. Dawson, Y. Jin, S. P. Edwardson, L. Li, G. Dearden
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2018)
Article
Physics, Applied
Lie Chen, Xing Wang, Tao Yang, Heng Ping, Peter Bennett, Zhong Zheng, Qibiao Yang, Walter Perrie, Stuart P. Edwardson, Geoff Dearden, Dun Liu
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2018)
Article
Optics
Jiangning Li, Yue Tang, Zheng Kuang, Joerg Schille, Udo Loeschner, Walter Perrie, Dun Liu, Geoff Dearden, Stuart Edwardson
OPTICS AND LASERS IN ENGINEERING
(2019)
Article
Materials Science, Multidisciplinary
Qianliang Li, Walter Perrie, Tong Zhou, Zheng Fang, Stuart Edwardson, Geoff Dearden
Summary: Zinc Selenide (ZnSe) is a highly transparent substrate widely used in infrared optics. This study investigates the near-infrared transmission properties of a pile-of-plates polarizer based on polycrystalline ZnSe plates. The experimental results show that the polarized light at 780 nm and 1.06 μm can be achieved with high degree of polarization. However, the observed absolute transmission is lower than expected, which may be attributed to surface scatter and residual birefringence.
Article
Chemistry, Physical
Zheng Fang, Tong Zhou, Walter Perrie, Matthew Bilton, Joerg Schille, Udo Loeschner, Stuart Edwardson, Geoff Dearden
Summary: A pulse burst optical system has been developed that can transform an energetic, ultrafast output pulse train into an intra-burst frequency of 323 MHz while maintaining a 5 kHz repetition rate. By utilizing an optical delay line and Spatial Light Modulators, the system enables independent modulation of the pulses. With this novel technique, it is possible to achieve simultaneous multi-spot periodic surface micro-structuring with orthogonal linear polarisations and cylindrical vector beams on stainless steel.
Proceedings Paper
Engineering, Mechanical
H. Gao, G. Sheikholeslami, G. Dearden, S. P. Edwardson
17TH INTERNATIONAL CONFERENCE ON SHEET METAL (SHEMET17)
(2017)
Proceedings Paper
Engineering, Mechanical
J. Yang, L. Pabst, W. Perrie, O. Allegre, G. Dearden, S. P. Edwardson
17TH INTERNATIONAL CONFERENCE ON SHEET METAL (SHEMET17)
(2017)
Proceedings Paper
Engineering, Manufacturing
Ghazal Sheikholeslami, Jonathan Griffiths, Geoff Dearden, Stuart P. Edwardson
LASER ASSISTED NET SHAPE ENGINEERING 9 INTERNATIONAL CONFERENCE ON PHOTONIC TECHNOLOGIES PROCEEDINGS OF THE LANE 2016
(2016)
Proceedings Paper
Engineering, Manufacturing
Dunia Lopez-Espiricueta, Eamonn Fearon, Stuart Edwardson, Geoffrey Dearden
LASER ASSISTED NET SHAPE ENGINEERING 9 INTERNATIONAL CONFERENCE ON PHOTONIC TECHNOLOGIES PROCEEDINGS OF THE LANE 2016
(2016)
Article
Optics
Jiangning Li, Zheng Kuang, Stuart Edwardson, Walter Perrie, Dun Liu, Geoff Dearden
Proceedings Paper
Optics
Zhongsheng Zhai, Zheng Kuang, Jinlei Ouyang, Dun Liu, Walter Perrie, Stuart P. Edwardson, Geoff Dearden
HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS VI
(2014)
