Results 11 to 20 of about 39,582 (257)
Multi-aperture foveated imaging [PDF]
Optics Letters, 2016 Foveated imaging, such as that evolved by biological systems to provide high angular resolution with a reduced space-bandwidth product, also offers advantages for man-made task-specific imaging. Foveated imaging systems using exclusively optical distortion are complex, bulky, and high cost, however.
Carles Santacana, Guillem +6 more
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Multi-aperture interferometry at Concordia [PDF]
Proceedings of the International Astronomical Union, 2006 The next generation (post-VLTI) of multi-telescope interferometric arrays operated in optical/infrared wavelengths should be kilometric, from 1 to 10 km. The Concordia station offers a unique opportunity to set such an interferometer in the best atmospheric conditions presently known on Earth.
Fossat, E. +11 more
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Remote Sensing, 2022 The spaceborne P-band fully polarimetric synthetic aperture radar (SAR) working system is highly susceptible to the scintillation effects induced by ionospheric irregularities due to its low carrier frequency.
Feixiang Tang +4 more
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Comparison Between Single-Aperture and Multi-Aperture Approaches to Computer Correction of Images [PDF]
EPJ Web of Conferences, 2020 The effectiveness of the reconstruction of images formed by single- and multi-aperture systems and distorted by an atmospheric turbulence is analyzed in this work.
Dudorov Vadim, Eremina Anna
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Photonics, 2023 The large-aperture space camera needs gravity unloading in the ground imaging quality test. The multi-point gravity balance method is mainly applied to the object with symmetrical structure and regular mass distribution, such as the primary mirror of the
Lihao Zhang +3 more
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A 3D Multi-Aperture Image Sensor Architecture [PDF]
IEEE Custom Integrated Circuits Conference 2006, 2006 An image sensor comprising an array of apertures each with its own local integrated optics and pixel array is presented. A lens focuses the image above the sensor creating overlapping fields of view between apertures. Multiple perspectives of the image in the focal plane facilitate the synthesis of a 3D image at a higher spatial resolution than the ...
Keith Fife +2 more
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Calculation of Temperature Rise in Multi-layer Biological Tissue Based on Large Aperture Concave Sphere Focused Ultrasonic Transducer [PDF]
Iranian Journal of Medical Physics, 2023 Introduction: The large aperture concave spherical focused ultrasonic transducer has stronger acoustic focusing effect and can obtain good temperature rise effect. The purpose of this study was to explore the effect of different frequency, duty cycle and
HU DONG +3 more
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Micromachines, 2022 As a widely clinical detection method, ultrasonography (US) has been applied to the diagnosis of breast cancer. In this paper, the multi-element synthetic aperture focusing (M-SAF) is applied to the ring array of breast ultrasonography (US) imaging ...
Yang Wu +8 more
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Compact multi-aperture imaging with high angular resolution [PDF]
Journal of the Optical Society of America A, 2015 Previous reports have demonstrated that it is possible to emulate the imaging function of a single conventional lens with an N×N array of identical lenslets to provide an N-fold reduction in imaging-system track length. This approach limits the application to low-resolution imaging.
Carles Santacana, Guillem +4 more
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The NRL Multi Aperture SAR system [PDF]
2015 IEEE Radar Conference (RadarCon), 2015 This paper describes the Naval Research Laboratory Multi Aperture Synthetic Aperture Radar (NRL MSAR) and presents initial results from the first field deployment of this system. The NRL MSAR is an airborne test bed designed to investigate remote sensing and surveillance applications that exploit multiple along-track phase centers, in particular ...
Sletten, Mark +4 more
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