A golay metalens for long-range, large aperture, thermal imaging via sparse aperture computational imaging. [PDF]
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Drought adaptation in spring wheat seedlings relies on coordinated deep root architecture and cortical tissue allocation. [PDF]
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Minimalist optical system for achromatic imaging within extended field of view based on monolithic integrated meta-axicon cluster. [PDF]
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FIMBRIN2 Regulates ABA-Induced Stomatal Closure by Promoting Microfilament Bundling and Turnover in Arabidopsis Guard Cells. [PDF]
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Apodization of annular apertures: Strehl ratio
Applied Optics, 1988We show that for any rotationally symmetric apodizer on the full aperture, there is a family of apodizers on the annular aperture with the same functional Strehl ratio vs defocus (W(20)) and vs spherical aberration (W(40)). However, in the latter case, the coefficients W(20) and W(40) are reduced by the factors (1 - epsilon(2)) and (1 - epsilon(2))(2 ...
J, Ojeda-Castaneda, E, Tepichin, A, Pons
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An affect of the aperture length to aperture width ratio on broadband shielding effectiveness
2011 XXXth URSI General Assembly and Scientific Symposium, 2011The influence of an aperture area (between 2λ2 and 11λ2) on the Shielding Effectiveness of metallic enclosures has been measured in an anechoic chamber, and wavelength dependent SE measurements are introduced. Measurement setup was established operating between 6GHz to 13GHz.
I. Bahadir Basyigit +3 more
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Signal-to-noise ratio of Singer product apertures
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2017Abstract Formulae for the signal-to-noise ratio (SNR) of Singer product apertures are derived, allowing optimal Singer product apertures to be identified, and the CPU time required to decode them is quantified. This allows a systematic comparison to be made of the performance of Singer product apertures against both conventionally wrapped Singer ...
Paul M.E. Shutler, Kevin Byard
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Signal-to-noise ratio in coded aperture imaging
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2012Abstract We present a derivation of the signal-to-noise ratio (SNR) of a cyclic difference set (CDS) based coded mask which is simpler than that given in the literature, and which applies to any distribution of flux against the mask, not just Poisson statistics as is currently the case.
Paul M.E. Shutler +2 more
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Concept of field-to-resolution ratio in aperture synthesis
SPIE Proceedings, 1994The analysis of the imaging properties of an interferometric device essentially depends on the parameters that govern the Fourier synthesis operation: extension and density of the experimental frequency coverage (resolution, field, robustness), size and nature of the input errors (input data for the study of the error propagation).
Andre Lannes +3 more
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A Miniaturized Design of Shared-aperture Antenna with High Aperture Reuse Ratio for 5G Applications
2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring), 2019A novel 3.5/38 GHz dual-band shared-aperture antenna is proposed in this paper. Miniaturization technology of the patch antenna is introduced into the shared-aperture antenna for the first time to reduce the occupied area. Meanwhile, high aperture reuse ratio and high channel isolation are achieved to support the sub-6G and the millimeter-wave antennas
Chun Xu Bai, Yu Jian Cheng
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