Results 191 to 200 of about 14,333 (240)
Nature inspired design methodology for a wide field of view achromatic metalens. [PDF]
NanophotonicsEngelberg J, Mazurski R, Levy U.
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The relativistic coma aberration. II. Helmholtz wave optics
Journal of Mathematical Physics, 1989 The relativistic coma aberration of geometric optics was examined in the first paper [J. Math. Phys. 30, 2457 (1989)]. Here is a study of a unitary realization of the Euclidean group, the dynamic group for global optics, on the space of solutions of the Helmholtz equation.
Natig M. Atakishiyev +2 more
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The relativistic coma aberration. I. Geometrical optics
Journal of Mathematical Physics, 1989 It is shown, in the framework of Hamilton–Lie geometrical optics, that the image on a moving screen undergoes comatic aberration as the conjugate sphere of ray directions distorts under Lorentz boosts.
Natig M. Atakishiyev +2 more
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Journal of the Optical Society of America, 1958 In the previous paper (part I), the relation between wave optics and geometrical optics has been studied generally by using the Fourier analysis. In this paper the general theory is applied to the concrete examples of the astigmatism, coma, and spherical aberration, and the following results are obtained.In case of astigmatism, if the magnitude of the ...
Kenrō Miyamoto
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Achromatic and Coma-Corrected Hybrid Meta-Optics for High-Performance Thermal Imaging
Nano LettersLong-wave infrared (LWIR) imaging, or thermal imaging, is widely applied in night vision and security monitoring. However, the widespread use of LWIR imagers is impeded by their bulky size, considerable weight, and high cost. While flat meta-optics present a potential solution to these limitations, existing pure LWIR meta-optics face constraints such ...
Mingze Liu +6 more
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SPIE Proceedings, 2015 As a novel spectrum imaging technology was developed recent years, push-broom coded aperture spectral imaging (PCASI) has the advantages of high throughput, high SNR, high stability etc. This coded aperture spectral imaging utilizes fixed code templates and push-broom mode, which can realize the high-precision reconstruction of spatial and spectral ...
Yangyang Liu +3 more
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Temporal optical behavior of HST: focus, coma, and astigmatism history
SPIE Proceedings, 2006The focus of the Hubble Space Telescope (HST) has been monitored throughout the life of the observatory primarily by phase retrieval techniques. This method generates and fits model Point Spread Functions (PSFs) to nearly in-focus stellar images to solve for coefficients of the Zernike polynomials describing focus, and often coma and astigmatism ...
Matthew D. Lallo +3 more
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Geometrical Optical Calculation of Frequency Response for Systems with Coma
Proceedings of the Physical Society, 1959The usefulness of the geometrical optical treatment of frequency response is considered here for the case of coma, an aberration having odd symmetry. Calculations of frequency response and phase shift using this treatment have been made, for different orientations of incoherent line objects, in the presence of Seidel coma in different focal planes ...
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A study of the optical variability of the Seyfert galaxy X Comae
Publications of the Astronomical Society of the Pacific, 1977Light curves in photographic and photographic visual magnitudes have been derived for the variable galaxy X Com from plates taken during the years 1907-74. Three results were obtained from the investigation. A photographic and photoelectric sequence of stars has been established around the galaxy, with positions near the center of the Coma cluster of ...
R. F. Green, J. P. Huchra, H. E. Bond
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