Results 91 to 100 of about 44,477 (288)
Optics Express, 2016 Current wavefront sensors for high resolution imaging have either a large dynamic range or a high sensitivity. A new kind of wavefront sensor is developed which can have both: the Generalised Optical Differentiation wavefront sensor. This new wavefront sensor is based on the principles of optical differentiation by amplitude filters.
openaire +4 more sources
Plenoptic wavefront sensor with scattering pupil
Optics Express, 2014 We consider a wavefront sensor combining scattering pupil with a plenoptic imager. Such a sensor utilizes the same reconstruction principle as the Hartmann-Shack sensor, however it is free from the ambiguity of the spot location caused by the periodic structure of the sensor matrix, and allows for wider range of measured aberrations.
Gleb Vdovin +2 more
openaire +3 more sources
Advanced Science, EarlyView.“Illusion” is a captivating topic throughout human civilization. This research proposes an advanced multi‐layer metasurface illusion strategy utilizing a technique known as “inverse synthetic aperture radar (ISAR)” imaging, enabling the creation of illusions over broadband and wide‐angle.
Haoran Li +12 more
wiley +1 more source
Compressive Wavefront Sensing with Weak Values [PDF]
, 2014 We demonstrate a wavefront sensor based on the compressive sensing, single-pixel camera. Using a high-resolution spatial light modulator (SLM) as a variable waveplate, we weakly couple an optical field's transverse-position and polarization degrees of freedom.
arxiv +1 more source
Pupil‐Adaptive Retina Projection Augment Reality Displays With Switchable Ultra‐Dense Viewpoints
Advanced Science, EarlyView.This paper presents a seamless retina projection AR display with 49 switchable ultra‐dense viewpoints, achieving a record high rotation precision of 1.28°/viewpoint. With a light selector, only a singular image can be consistently perceived by eye‐tracking without image missing or overlapping regardless of dynamic pupil under different ambient lights ...
Haonan Jiang +9 more
wiley +1 more source
WIREs RNA, Volume 14, Issue 1, January/February 2023., 2023 Genetic oscillators play crucial roles in development. The hairy/Enhancer of split gene family (Hes/her) undergo cell‐autonomous genetic oscillations to regulate the timing of vertebrate segmentation and neural cell proliferation and differentiation. mRNA stability and translation are tightly regulated to maintain oscillatory expression.
Monica C. Blatnik +2 more
wiley +1 more source
Multi‐Wavelength Achromatic 3D Meta‐holography with Zoom Function
Advanced Science, EarlyView.Due to the wavelength mismatch, chromatic aberrations are inevitable in multi‐wavelength meta‐holography. Moreover, since the meta‐hologram is difficult to be refreshed, zoom meta‐holography has not been reported to date. This study proposes a multi‐wavelength achromatic 3D meta‐holography with a zoom function, breaking through both the chromatic ...
Chao Liu +17 more
wiley +1 more source
IET Science, Measurement &Technology, Volume 17, Issue 1, Page 11-26, January 2023., 2023 Abstract Partial discharge (PD) localization is critical to ensure the safe operation of power equipment. In this paper, an optimization scheme is developed for PD positioning of external insulation equipment. The optimization scheme is based on an eight‐element cross sensor array to receive the ultrasonic signal generated by the PD, and uses the ...
Shaotong Pei +4 more
wiley +1 more source
An Efficient Pipeline Wavefront Phase Recovery for the CAFADIS Camera for Extremely Large Telescopes
Sensors, 2009 In this paper we show a fast, specialized hardware implementation of the wavefront phase recovery algorithm using the CAFADIS camera. The CAFADIS camera is a new plenoptic sensor patented by the Universidad de La Laguna (Canary Islands, Spain ...
Eduardo Magdaleno +2 more
doaj +1 more source
Phase imaging by spatial wavefront sampling [PDF]
, 2017 Phase imaging techniques extract the optical path-length information of a scene, whereas wavefront sensors provide the shape of an optical wavefront. Since these two applications have different technical requirements, they have developed their own specific technology.
arxiv +1 more source