Results 11 to 20 of about 30,212 (267)
Micromachines, 2020 A convex spiral phaser array (CSPA) is designed and fabricated to generate typical convergent Laguerre-Gaussian (LG) beams. A type of 3D printing technology based on the two-photon absorption effect is used to make the CSPAs with different featured sizes,
Chang Liu +7 more
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Multispectral metamaterial absorber [PDF]
Optics Letters, 2014 We present the simulation, implementation, and measurement of a multispectral metamaterial absorber (MSMMA) and show that we can realize a simple absorber structure that operates in the mid-IR and terahertz (THz) bands. By embedding an IR metamaterial absorber layer into a standard THz metamaterial absorber stack, a narrowband resonance is induced at a
Grant, J. +3 more
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Research on the light-field characteristics of patterned planar nanotip metasurface [PDF]
EPJ Web of ConferencesMetasurfaces in namo-meter are widely applied to improve the lightwave controllability. The reflection of the proposed planar nanotip metasurface in infrared regime was demonstrated to be effectively modulated, and the minimum value is ~41.0% under an ...
Liu Taige +4 more
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A liquid-crystal microlens with dual-layers arrayed pattern electrode for the effective modulation of incident light beams [PDF]
EPJ Web of ConferencesIn this paper, an electrically controlled liquid crystal (LC) microlens array based on dual-layer arrayed planar pattern electrode is reported for effective light wave modulation.
Ye Mao +4 more
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Micromachines, 2020 As a unique electric-optics material, liquid crystals (LCs) have been used in various light-control applications. In LC-based light-control devices, the structural alignment of LC molecules is of great significance. Generally, additional alignment layers
Mingce Chen +9 more
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Remote Sensing, 2019 Multispectral image matching plays a very important role in remote sensing image processing and can be applied for registering the complementary information captured by different sensors. Due to the nonlinear intensity difference in multispectral images,
Tao Ma, Jie Ma, Kun Yu
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Attitude Tracking Control Reconfiguration for Space Launch Vehicle With Thrust Loss Fault
IEEE Access, 2019 The thrust loss fault of the space launch vehicle is quite different from that of ordinary actuator efficiency loss. Focusing on the attitude tracking control problem of the launch vehicle with thrust loss fault, the special impacts of that fault on the ...
Yaokun Zhang +4 more
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Multispectral panoramic mosaicing [PDF]
Pattern Recognition Letters, 2005 Image mosaicing overcomes the limitations of a camera's limited field of view by aligning and pasting suitably transformed frames in a sequence of overlapping images. This paper deals with multispectral mosaicing for enhancement of spectral information-information from the thermal infra-red (IR, hereafter) band and visible band images is directly fused
Udhav Bhosle +2 more
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Adaptive Polynomial Guidance With Impact Angle Constraint Under Varying Velocity
IEEE Access, 2019 Considering the velocity of the missile cannot remain constant in most applications due to the effect of aerodynamic drag and thrust, a feasible adaptive impact angle control guidance law under varying velocity is proposed.
Zhongtao Cheng +3 more
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Nonlinear Deblurring for Low-Light Saturated Image
Sensors, 2023 Single image deblurring has achieved significant progress for natural daytime images. Saturation is a common phenomenon in blurry images, due to the low light conditions and long exposure times.
Shuning Cao +4 more
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