Results 1 to 10 of about 3,010,687 (303)
Dielectric Metasurface-Based High-Efficiency Mid-Infrared Optical Filter [PDF]
Nanomaterials, 2018 Dielectric nanoresonantors may generate both electric and magnetic Mie resonances with low optical loss, thereby offering highly efficient paths for obtaining integrated optical devices.
Fei Shen +5 more
doaj +4 more sources
Wide-Angular Tolerance Optical Filter Design and Its Application to Green Pepper Segmentation [PDF]
Sensors, 2023 The optical filter is critical in many applications requiring wide-angle imaging perception. However, the transmission curve of the typical optical filter will change at an oblique incident angle due to the optical path of the incident light change.
Jun Yu, Shu Zhan, Toru Kurihara
doaj +2 more sources
A solid-state optical filter at 1530 nm based on Voigt anomalous dispersion effect in rare earth ion-doped crystal [PDF]
Heliyon, 2023 This paper proposes an ultra-narrow band solid state optical filter with Voigt anomalous dispersion at 1530 nm based on Er3+: LiYF4, sets a theoretical model for its realization of ultra-narrow band optical filtering, and performs simulations based on ...
Kailun Wen +4 more
doaj +2 more sources
Optical Filter Net: A Spectral-Aware RGB Camera Framework for Effective Green Pepper Segmentation
IEEE Access, 2021 Detecting and identifying objects of similar color is a challenging task in computer vision. Green peppers in a natural environment can be found using the abundant information provided by a hyperspectral camera in the spectral domain, but the ...
Jun Yu, Toru Kurihara, Shu Zhan
doaj +1 more source
Optical Filter Bank Modeling and Design for Multi-Color Visible Light Communications
IEEE Photonics Journal, 2021 Multi-color visible light communication (MC-VLC) can achieve a multi-fold rate by taking advantage of multiple color channels. The optical filters for separating different colors are often designed for the normal incidence case only.
Pengfei Ge +5 more
doaj +1 more source
Retinal Protection from LED-Backlit Screen Lights by Short Wavelength Absorption Filters
Cells, 2021 (1) Background: Ocular exposure to intense light or long-time exposure to low-intensity short-wavelength lights may cause eye injury. Excessive levels of blue light induce photochemical damage to the retinal pigment and degeneration of photoreceptors of ...
Celia Sanchez-Ramos +8 more
doaj +1 more source
Cold-atom optical filtering enhanced by optical pumping
Frontiers in Physics, 2022 Atomic optical filters such as Faraday anomalous dispersion optical filters (FADOFs) or similar technologies can achieve very narrow optical bandwidth close to the scale of atomic linewidth, which can be greatly reduced in cold atoms. However, limited by
Xiaolei Guan +7 more
doaj +1 more source
Crystals, 2022 In this paper, a 4-N,N-dimethylamino-4′-N′-methyl-stilbazolium tosylate (DAST) material assisted one-dimensional photonic-crystal-based (1D-PhC) tunable optical filter is presented.
Amit Kumar Goyal +2 more
doaj +1 more source
A Mid-Infrared Multifunctional Optical Device Based on Fiber Integrated Metasurfaces
Nanomaterials, 2023 A metasurface is a two-dimensional structure with a subwavelength thickness that can be used to control electromagnetic waves. The integration of optical fibers and metasurfaces has received much attention in recent years. This integrated device has high
Weikang Yao +3 more
doaj +1 more source
IEEE Photonics Journal, 2020 It is difficult for optical correlator to recognize the target with large rotation distortion by using existing filters. To solve this problem, a new neural network model is constructed based on the physical recognition process of planar integrated 2F ...
Tuo Yang +4 more
doaj +1 more source