Results 31 to 40 of about 2,844,522 (254)
Performance Characterization of Deep-Phase-Retrieval Shack-Hartmann Wavefront Sensors
IEEE Photonics Journal, 2023 Shack-Hartmann wavefront sensor (SHWFS) is the most popular wavefront sensor in adaptive optics systems. The Deep-Phase-Retrieval Wavefront Reconstruction (DPRWR) method, which was proposed by our group previously, is a kind of deep learning-based ...
Manting Zhang, Youming Guo
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Research on Optical Metrology for Complex Optical Surfaces with Focal Plane Wavefront Sensing
Micromachines, 2023 Complex optical elements have the advantages of improving image quality and optical performance and expanding the field of view. Therefore, it is widely used in X-ray scientific devices, adaptive optical elements, high-energy laser systems, and other ...
Xinxue Ma +4 more
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Self-Aligning Scanning Shack-Hartmann Sensor for Automatic Wavefront Measurements of High-NA Optics
, 2020 Optical parts, such as lenses or mirrors, are often qualified by surface shape metrology. Wavefront measurements allow for a more direct measurement of the performance of an optical part.
Georg Schitter +7 more
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Wavefront Aberration Measurement Deflectometry for Imaging Lens Tests
Applied Sciences, 2022 Lenses play an important role in imaging systems. Having an effective way to test the aberrations of imaging lenses is important. However, the existing methods cannot satisfy the requirements in some conditions.
Linzhi Yu +5 more
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Modelling Delta-Notch perturbations during zebrafish somitogenesis. [PDF]
, 2013 The discovery over the last 15 years of molecular clocks and gradients in the pre-somitic mesoderm of numerous vertebrate species has added significant weight to Cooke and Zeeman's ‘clock and wavefront’ model of somitogenesis, in which a travelling ...
Baker, Ruth E. +2 more
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Deep Tissue Wavefront Estimation for Sensorless Aberration Correction
MATEC Web of Conferences, 2015 The multiple light scattering in biological tissues limits the measurement depth for traditional wavefront sensor. The attenuated ballistic light and the background noise caused by the diffuse light give low signal to noise ratio for wavefront ...
Ibrahimovic Emina +4 more
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Journal of Synchrotron RadiationAchieving diffraction-limited performance in fourth-generation synchrotron radiation sources demands monochromator crystals that can preserve the wavefront across an unprecedented extensive range.
Fang Liu +14 more
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Interferometric Wavefront Sensing System Based on Deep Learning
Applied Sciences, 2020 At present, most wavefront sensing methods analyze the wavefront aberration from light intensity images taken in dark environments. However, in general conditions, these methods are limited due to the interference of various external light sources.
Yuhao Niu +4 more
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Terahertz wavefront measurement with a Hartmann sensor
, 2012 The measurement of the wavefront of a terahertz (THz) beam is essential for the development of any optical instrument operating at THz frequencies. We have realized a Hartmann wavefront sensor for the THz frequency range.
Grahn, Holger-T. +17 more
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Surface Measurement Using Compressed Wavefront Sensing
Photonic Sensors, 2018 Compressed sensing leverages the sparsity of signals to reduce the amount of measurements required for its reconstruction. The Shack-Hartmann wavefront sensor meanwhile is a flexible sensor where its sensitivity and dynamic range can be adjusted based on
Eddy Mun Tik Chow +3 more
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