Article
Chemistry, Analytical
Alok Kumar Pandey, Tanguy Larrieu, Guillaume Dovillaire, Sophie Kazamias, Olivier Guilbaud
Summary: This paper reports the single-shot amplitude, wavefront, and modal content characterization of ultrashort Orbital Angular Momentum (OAM) using a Shack-Hartmann wavefront sensor. The reconstructed wavefronts and Laguerre-Gauss decomposition reveal the mode composition of vortex beams under different conditions.
Article
Optics
Nikolaus Berlakovich, Ernst Csencsics, Martin Fuerst, Georg Schitter
Summary: The algorithm presented in this paper can accurately register multiple wavefront segments, suitable for freeform wavefronts, with higher registration precision.
Article
Optics
You Li, Junyong Zhang, Yaling Yang, Yanli Zhang
Summary: SHWS is a traditional method with simple structure, good usability, real-time monitoring and wide waveband. The introduction of self-interference Taiji lens is aimed to improve the precision of wavefront sensing, with experiments to verify its validity.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Optics
Jing Wang, Xiaokun Wang, Lirong Peng, Jincheng Wang, Zhongkai Liu, Lingzhong Li, Mengxue Cai, Bin Liu, Wenhan Li, Xuejun Zhang
Summary: A non-null testing method utilizing Shack-Hartmann wavefront sensor is proposed to measure freeform surfaces, which improves measurement accuracy and dynamic range. A mathematical model and algorithm are developed to calculate the corresponding relationship between sampling points and spots, and experimental results demonstrate the feasibility and measurement capabilities of the method.
Article
Optics
Yi Zheng, Mu Yang, Zheng-Hao Liu, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo
Summary: In this work, we demonstrate the capability of the Shack-Hartmann wavefront sensor to detect weak values of transverse momentum, extending its input states to partially coherent states and comparing it with the weak measurement wavefront sensor. Our findings have important applications in fundamental quantum physics and quantum metrology.
Article
Optics
Jing Wang, Xiaokun Wang, Lirong Peng, Jincheng Wang, Zhongkai Liu, Lingzhong Li, Mengxue Cai, Bin Liu, Wenhan Li, Xuejun Zhang
Summary: A non-null testing method utilizing a Shack-Hartmann wavefront sensor is proposed for measuring freeform surfaces. By establishing a mathematical model and algorithm, the dynamic range and measurement accuracy can be improved. Experimental results demonstrate the feasibility and measurement capabilities of this method.
Article
Physics, Multidisciplinary
Yanrong Yang, Linhai Huang, Yawei Xiao, Naiting Gu
Summary: This paper proposes a new polarized SHWFS (p-SHWFS) based on the principle of polarization imaging, which uses the difference of state of polarization (SoP) between signal and stray light to improve image contrast. The p-SHWFS is composed of a micro-lens array and a linear polarization camera, which can analyze the degree of linear polarization (DoLP) and angle of linear polarization (AoLP) for the incident wavefront. Numerical simulation and practical experiments validate the feasibility and accuracy improvement of the p-SHWFS.
FRONTIERS IN PHYSICS
(2023)
Article
Optics
Yongfeng Zhang, Shengqian Wang, Hao Xian, Changhui Rao
Summary: A novel method based on matrix product is proposed in this Letter for calibrating the Shack-Hartmann wavefront sensor, which demonstrates superior accuracy and efficiency compared to traditional methods.
Article
Optics
Oliver Huerta-Carranza, Jesus DelOlmo-Marquez, Iran Robles-Gutierrez, Manuel Campos-Garcia, Maximino Avendano-Alejo
Summary: We propose an iterative procedure using a Shack-Hartmann sensor to retrieve the wavefront. Our method considers the reconstruction of wavefront deformations with respect to a known reference wavefront, allowing for accurate retrieval even when the wavefront deviates significantly from a plane. Simulation and experimental results show that our method retrieves wavefronts closer to the real wavefront compared to other commonly used approaches.
OPTICAL ENGINEERING
(2023)
Review
Polymer Science
Martina Vacalebre, Renato Frison, Carmelo Corsaro, Fortunato Neri, Sabrina Conoci, Elena Anastasi, Maria Cristina Curatolo, Enza Fazio
Summary: Adaptive optics is used to continuously measure and correct ocular aberrations, improving vision. The combination of wavefront technology and adaptive optics systems allows for preoperative evaluation of refractive surgical procedures and guidance for surgeons in choosing the appropriate parameters. This is important for improving patient vision quality and meeting clinical needs.
Article
Optics
Jian Huang, Lianqun Yao, Shuyun Wu, Gongchang Wang
Summary: The Shack-Hartmann wavefront sensor is crucial in adaptive optics systems for detecting aberrant wavefronts. However, under-sampling due to imperfect micro-lenslets or pupil shift can lead to degraded wavefront reconstruction. This study evaluates the impact of under-sampling on wavefront reconstruction using an AO system simulation.
Article
Optics
Biswa R. Swain, Christophe Dorrer, Jie Qiao
Summary: An Optical Differentiation Wavefront Sensor based on a telephoto lens system and binary pixelated filters is reported in this study, which can measure wavefronts with accuracy better than lambda/10 Root Mean Squared (RMS) at lambda=633 nm. The system shows a high tolerance to components alignment errors in experimental investigation.
Article
Optics
Zhentao Zhang, Tim Morris, Nazim Bharmal, Yonghui Liang
Summary: A new self-referencing method using the cell image of PlWFS as a correlation reference has been proposed for simultaneous measurement of high-order aberrations and tilt. Simulations confirm the feasibility of the method and show improved AO performance compared to existing techniques. This method allows stable wavefront tilt control with small residual variance.
Article
Chemistry, Multidisciplinary
Bo Chen, Jingjing Jia, Yilin Zhou, Yirui Zhang, Zhaoyi Li
Summary: This paper proposes a novel subaperture image preprocessing method to improve the signal-to-noise ratio in an extended scene Shack-Hartmann wavefront sensor and enhance the accuracy of offset estimation and slope measurement.
APPLIED SCIENCES-BASEL
(2023)
Article
Optics
Xiaosong Wu, Linhai Huang, Naiting Gu, Haoming Tian, Wenju Wei
Summary: In this study, a novel Shack-Hartmann wavefront sensor with adjustable spatial sampling (ASS-WFS) based on a spherical reference wave is proposed. By moving the microlens array and CCD detector, the sensor can achieve variable spatial sampling, thereby improving the performance of the adaptive optics system and the accuracy of wavefront reconstruction.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
Colm Lynch, Nicholas Devaney
Article
Optics
Timothee E. Cognard, Chris Dainty, Nicholas Devaney
Article
Optics
Nicholas Devaney, Fiona Kenny, Alexander V. Goncharov, Matthias Goy, Claudia Reinlein
Article
Optics
Sanjay Keshri, Kevin Murphy, Vincent Toal, Izabela Naydenova, Suzanne Martin
Article
Optics
Kevin Murphy, Vincent Toal, Izabela Naydenova, Suzanne Martin
Article
Optics
Colm Lynch, Nicholas Devaney, Chris Dainty
Article
Optics
S. Keshri, J. Marin-Saez, I Naydenova, K. Murphy, J. Atencia, D. Chemisana, S. Garner, M. Collados, S. Martin
Article
Chemistry, Multidisciplinary
Sanjay Keshri, Brian Rogers, Kevin Murphy, Kevin Reynolds, Izabela Naydenova, Suzanne Martin
Summary: The paper explores a method for producing a compound DOE for combining elements designed for two separate target wavelengths to achieve a highly efficient HOE with reduced dispersion. A photopolymer material with two independently sensitized laminated layers is used for sequential holographic recording at two different wavelengths. The recorded photonic structures are investigated through examination of diffraction peaks and comparison with predicted structure from modeling, and a strong diffracted beam is observed when the device is illuminated with expanded diverging beams at both target wavelengths and with white light.
APPLIED SCIENCES-BASEL
(2021)
Article
Optics
Emma Branigan, Suzanne Martin, Matthew Sheehan, Kevin Murphy
Summary: An analog holographic wavefront sensor (AHWFS) has been developed for measuring low and high order aberration modes using volume phase holograms in a photopolymer recording medium. This is the first time that high order aberrations such as spherical aberration can be sensed using a volume hologram in a photosensitive medium. The sensors showed accurate measurements of defocus and spherical aberration, and the multi-mode sensor exhibited promising characteristics similar to the single-mode sensors. Improvement in quantifying defocus and a brief study on material shrinkage and sensor linearity were also presented.
Article
Chemistry, Analytical
Tatsiana Mikulchyk, Kevin Murphy, John Walsh, Suzanne Martin, Dervil Cody, Izabela Naydenova
Summary: Volume reflection hologram-based sensors change color in response to stressors or analytes, but thick photopolymer films used to fabricate reflection holograms have high angular selectivity, making them difficult for non-experts to view and interpret. This study presents the use of speckle holography to improve the visibility of reflection holograms. A novel recording approach combining speckle recording techniques with Denisyuk reflection recording geometry is described, enabling the creation of speckle reflection gratings with a wider range of angles and wavelengths. The comparative performance of speckle and standard reflection gratings as color-changing compressional pressure sensors is also discussed.
Proceedings Paper
Engineering, Aerospace
Emma Branigan, Suzanne Martin, Matthew Sheehan, Kevin Murphy
Summary: The fabrication of an analog holographic wavefront sensor capable of detecting low-order defocus aberration in an acrylamide-based photopolymer was achieved. The use of conventional refractive elements in the recording setup reduces the cost and complexity of holographic optical element (HOE) production. By multiplexing two HOEs with different carrier spatial frequencies, a pair of diffraction spots corresponding to maximum and minimum defocus amounts can be spatially separated in the detector plane.
ENVIRONMENTAL EFFECTS ON LIGHT PROPAGATION AND ADAPTIVE SYSTEMS IV
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
Cara Jones, Suzanne Martin, Sanjay Keshri, Dervil Cody, Kevin Murphy
PHOTOSENSITIVE MATERIALS AND THEIR APPLICATIONS
(2020)
Proceedings Paper
Computer Science, Information Systems
Timothee E. Cognard, Alexander Goncharov, Nicholas Devaney, Chris Dainty, Peter Corcoran
2018 IEEE GAMES, ENTERTAINMENT, MEDIA CONFERENCE (GEM)
(2018)
Proceedings Paper
Optics
Matthias Goy, Claudia Reinlein, Nicholas Devaney, Fiona Kenny, Ramona Eberhardt, Andreas Tuennermann
ADAPTIVE OPTICS SYSTEMS VI
(2018)
Proceedings Paper
Astronomy & Astrophysics
Fiona Kenny, Nicholas Devaney, Alexander Goncharov, Matthias Goy, Claudia Reinlein
SPACE TELESCOPES AND INSTRUMENTATION 2018: OPTICAL, INFRARED, AND MILLIMETER WAVE
(2018)