Results 21 to 30 of about 11,072 (199)
Design of a Prism-Grating Wide Spectral Range Transmittance Imaging Spectrometer
Sensors, 2023 As spectroscopic detection technology rapidly advances, back-illuminated InGaAs detectors with a wider spectral range have emerged. Compared to traditional detectors such as HgCdTe, CCD, and CMOS, InGaAs detectors offer a working range of 400–1800 nm and
Xu Zhang +6 more
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An all metasurface-based fiber needle probe for Raman spectroscopy
Frontiers in Physics, 2022 Optical fiber-based spectroscopy sensors are widely used for industrial and biomedical applications. They normally consist of at least one excitation fiber and one collection fiber.
Shuyan Zhang +6 more
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Light: Science & Applications, 2023 Achromatic doublets are combinations of two individual lenses designed to focus different wavelengths of light in the same position. Apochromatic optics are improved versions of the achromatic schemes which extend the wavelength range significantly. Both
Umut T. Sanli +8 more
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Doublet Metalens with Simultaneous Chromatic and Monochromatic Correction in the Mid-Infrared
Sensors, 2022 Metalenses provide a powerful paradigm for mid-infrared (MIR) imaging and detection while keeping the optical system compact. However, the design of MIR metalenses simultaneously correcting chromatic aberration and off-axis monochromatic aberration ...
Yi Zhou +5 more
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Achromatic color categories [PDF]
Perception & Psychophysics, 1985 Sternheim and Boynton’s (1966) continuous judgmental color-naming technique was used to assess the elemental nature of achromatic colors. Results from three subjects indicate that the names “black” and “white” are necessary and sufficient to describe achromatic test lights associated with the name “gray.” On the basis of the criteria that establishes a
P C, Quinn, B R, Wooten, E J, Ludman
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Metalens-Based Miniaturized Optical Systems
Micromachines, 2019 Metasurfaces have been studied and widely applied to optical systems. A metasurface-based flat lens (metalens) holds promise in wave-front engineering for multiple applications.
Bo Li, Wibool Piyawattanametha, Zhen Qiu
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Results in Physics, 2023 Metalenses provide unprecedented opportunities to overcome the limitations of conventional refractive lenses, which have been extensively studied to achieve achromatic focusing and imaging in various wavebands. However, it is a challenging task to create
Yechuan Zhu +6 more
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Advanced Photonics Research, 2023 Nematic liquid‐crystal microlens arrays (LC‐MLAs) often exhibit chromatic aberration and low resolution, severely compromising their optical imaging quality.
Hui Li, Tian Li, Si Chen, Yuntao Wu
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Polarization Independent Achromatic Meta-Lens Designed for the Terahertz Domain
Frontiers in Physics, 2020 In recent years, metasurface-based focusing elements have gradually become an indispensable type of terahertz lenses. However, the meta-lens often suffers from chromatic aberration due to the intrinsic dispersion of each element, especially in the ...
Yufei Gao +7 more
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Inverse design of high-efficiency long-wave infrared achromatic metalenses based on an optical diffraction neural network framework [PDF]
APL PhotonicsMetalenses offer a promising path toward ultra-compact achromatic optical systems. However, conventional achromatic metalens designs based on hyperbolic phase profiles face limitations, as practical meta-atoms cannot fully satisfy ideal phase ...
Yutong Di +15 more
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