Results 31 to 40 of about 1,618 (216)
Results in Optics, 2021 An incoherent optical system with wavefront coding extends the depth of field (DOF) by employing a cubic phase plate (CPP). We designed a digital microscope with a CPP in the aperture stop and on the surface of the lens, which extended the DOF.
Chi-Feng Lee, Cheng-Chung Lee
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Secure communication with coded wavefronts
2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2017 Communication between a sender and receiver can be made secure by encrypting the message using public or private shared keys. Quantum key distribution utilizes the unclonability of a quantum state to securely generate a key between the two parties [1]. However, without some way of authentication of either the sender or the receiver, a man-in-the-middle
Uppu, Ravitej +5 more
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A review of liquid crystal spatial light modulators: devices and applications
Opto-Electronic Science, 2023 Spatial light modulators, as dynamic flat-panel optical devices, have witnessed rapid development over the past two decades, concomitant with the advancements in micro- and opto-electronic integration technology.
Yiqian Yang, Andrew Forbes, Liangcai Cao
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Ultra-high resolution coded wavefront sensor
Optics Express, 2017 Wavefront sensors and more general phase retrieval methods have recently attracted a lot of attention in a host of application domains, ranging from astronomy to scientific imaging and microscopy. In this paper, we introduce a new class of sensor, the Coded Wavefront Sensor, which provides high spatio-temporal resolution using a simple masked sensor ...
Wang, Congli +3 more
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Reduction of artefacts and noise for a wavefront coding athermalized infrared imaging system
, 2016 Because of obvious drawbacks including serious artefacts and noise in a decoded image, the existing wavefront coding infrared imaging systems are seriously restricted in application.
Shi ZL(史泽林) +4 more
core +2 more sources
Convolution operations on time-domain digital coding metasurface for beam manipulations of harmonics
Nanophotonics, 2020 Time-domain digital coding metasurfaces have been proposed recently to achieve efficient frequency conversion and harmonic control simultaneously; they show considerable potential for a broad range of electromagnetic applications such as wireless ...
Zhang Cheng +10 more
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Acoustic Focusing with Intensity Modulation Based on Sub-Wavelength Waveguide Array
Crystals, 2021 Acoustic focusing with intensity modulation plays an important role in biomedical and life sciences. In this work, we propose a new approach for simultaneous phase and amplitude manipulation in sub-wavelength coupled resonant units, which has not been ...
Mingran Zhang, Guangrui Gu
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Time-sequential Pipelined Imaging with Wavefront Coding and Super Resolution [PDF]
, 2017 Wavefront coding has long offered the prospect of mitigating optical aberrations and extended depth of field, but image quality and noise performance are inevitably reduced. We report on progress in the use of agile encoding and pipelined fusion of image
Andrew R. Harvey +7 more
core +1 more source
Broadband photon sieves imaging with wavefront coding
Optics Express, 2015 A novel method for broadband imaging of using a diffractive photon sieves is proposed and experimentally demonstrated. Unlike conventional photon sieves imaging in which clear imaging is only valid at a single designed wavelength due to the strong wavelength-dependent nature of diffractive elements, broadband photon sieves imaging is implemented with ...
Xiaonan, Zhao +3 more
openaire +2 more sources
Optimizing trefoil phase plates design for color wavefront coding
, 2018 Wavefront coding refers to the use of a phase modulating element in conjunction with deconvolution to extend the depth of focus of an imaging system. The coding element is an asymmetrical phase plate shape, for most applications in the form of a trefoil ...
Juan-Miguel Olvera-Angeles +13 more
core +1 more source