Results 21 to 30 of about 655,744 (304)

Study on Optical Properties of Micro-Modulator Through $Z$-Scanning Method

IEEE Photonics Journal, 2016
Stokes polarimeters and scanning slit optical beam profilers are used to measure the polarization properties and optical spot intensities of a laser beam, which go through the micromodulator by the $Z$-scanning method. The polarization properties of a $
X. B. Jiao, S. Xue, Y. F. Shen, M. Y. Chen, Z. W. Liu   +4 more
doaj   +1 more source

Broadband High Optical Transparent Intelligent Metasurface for Adaptive Electromagnetic Wave Manipulation

Research
Intelligent metasurfaces have garnered widespread attention owing to their properties of sensing electromagnetic (EM) environments and multifunctional adaptive EM wave manipulation.
Chao Xia, Zhengang Lu, Yilei Zhang, Jiubin Tan   +3 more
doaj   +1 more source

The ROTSE-III Robotic Telescope System [PDF]

, 2002
The observation of a prompt optical flash from GRB990123 convincingly demonstrated the value of autonomous robotic telescope systems. Pursuing a program of rapid follow-up observations of gamma-ray bursts, the Robotic Optical Transient Search Experiment (
Beatty J., C. W. Akerlof, D. A. Smith, D. E. Casperson, E. S. Rykoff, H. W. Epps, J. A. Schier, J. A. Wren, Jeas W. C., K. E. McGowan, M. A. Phillips, M. C. B. Ashley, P. R. Wozniak, R. L. Kehoe, S. L. Marshall, Sampson R., Sampson R., T. A. McKay, W. T. Vestrand, Wynne C. G.   +19 more
core   +4 more sources

Optimized Fresnel lens design for enhanced Passive infrared sensors in advanced security monitoring systems

Results in Optics
Passive Infrared (PIR) motion sensors are integral to modern residential and commercial security systems, valued for their reliability, cost-effectiveness, and ability to detect motion through infrared radiation.
Vo Quang Sang, Pham Van Quan, Bui Dinh Bao   +2 more
doaj   +1 more source

Polarization Controllable Device for Simultaneous Generation of Surface Plasmon Polariton Bessel-Like Beams and Bottle Beams

Nanomaterials, 2018
Realizing multiple beam shaping functionalities in a single plasmonic device is crucial for photonic integration. Both plasmonic Bessel-like beams and bottle beams have potential applications in nanophotonics, particularly in plasmonic based circuits ...
Peizhen Qiu, Taiguo Lv, Yupei Zhang, Binbin Yu, Jiqing Lian, Ming Jing, Dawei Zhang   +6 more
doaj   +1 more source

The Physical Model in Action: Quality Control for X-Shooter

, 2010
The data reduction pipeline for the VLT 2nd generation instrument X-Shooter uses a physical model to determine the optical distortion and derive the wavelength calibration.
Bristow, Paul, Kerber, Florian, Modigliani, Andrea, Moehler, Sabine, Vernet, Joel   +4 more
core   +1 more source

Convergent Annular Thermoelectric Generator with Fish-Fin-like Heat Exchange

Energies
To address the critical challenge of low thermoelectric conversion efficiency in high-temperature, highly turbulent waste heat recovery, a novel fish-fin convergent annular thermoelectric generator (FF-CATEG) device is proposed.
Ning Wang, Zirui Zhang, Jiahao Li, Jianxiang Cheng, Hongzhi Jia, Bo Dai, Dawei Zhang   +6 more
doaj   +1 more source

Dual-Focuses Metalens for Copolarized and Cross-Polarized Transmission Waves

Advances in Condensed Matter Physics, 2018
Metasurfaces can reshape the wavefront in the desired manner by manipulating the phase profile and amplitude of the incident wave. In this paper, we demonstrate an ultrathin terahertz metalens based on our designed resonator structure, where the ...
Ru Ji, Kejian Chen, Yujie Ni, Yanan Hua, Kaiwen Long, Songlin Zhuang   +5 more
doaj   +1 more source

Optofluidic Tunable Linear Narrow-Band Filter Based on Bragg Nanocavity

IEEE Photonics Journal, 2017
A compact, tunable linear optofluidic Bragg filter is simulated, designed, fabricated, and characterized. The device consists of a nanocavity sandwiched by two symmetrical film stacks made of high- and low-refractive-index dielectric materials.
Chaolong Fang, Bo Dai, Qiao Xu, Qi Wang, Dawei Zhang   +4 more
doaj   +1 more source

Optical distance measuring instrument [PDF]

, 1986
An optical instrument, such as a stability monitor or a target range finder, uses an unstabilized laser to project a composite optical signal of coherent light having two naturally occurring longitudinal mode components. A beamsplitter divides the signal
Abshire, J. B.
core   +1 more source