A target detectability assessment metric for the underwater electro-optic imaging system

As the synthetic aperture has been widely used in remote sensing and imaging system. Various methods have been used to enhance the imgaing speed of the system. Optical method has been proved to have the high imaging speed in processing microwave signals. The received signal can be modulated in optical carrier by the electro-optic amplitude modulation. The optical signal is processed by relevant optical instruments. The article compares the new electro-optic imaging system with the original system. The principle of the new system has been proved to be similar with the original system. The structure of the new system has been verified to have the possibility to realize real-time imaging. The key point of the new system has been analysed and the main challenge in the new system has been checked in the article.

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Development and characterization of LiNbO 3 electro-optic phase modulator at 220 GHz for millimeter-wave imaging system

10.1117/12.898305 ◽

2011 ◽

Cited By ~ 1

Author(s):

Julien Macario ◽

Christopher A. Schuetz ◽

Peng Yao ◽

Shouyuan Shi ◽

Dennis W. Prather

Keyword(s):

Millimeter Wave ◽

Imaging System ◽

Phase Modulator ◽

Millimeter Wave Imaging ◽

Electro Optic ◽

Wave Imaging

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Real-time THz imaging system based on electro-optic crystals

10.1117/12.328750 ◽

1998 ◽

Cited By ~ 1

Author(s):

Z. G. Lu ◽

Xi-Cheng Zhang

Keyword(s):

Real Time ◽

Imaging System ◽

Thz Imaging ◽

Electro Optic

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Fibers-based temporal super-resolved imaging

Scientific Reports ◽

10.1038/s41598-020-74879-z ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Sagie Asraf ◽

Moti Fridman ◽

Zeev Zalevsky

Keyword(s):

Optical Fibers ◽

Imaging System ◽

Imaging Systems ◽

Temporal Domain ◽

Electro Optic ◽

Resolution Improvement ◽

A New Technique ◽

Resolving System ◽

Optical Realization ◽

Low Rate

Abstract In this paper we present a new technique for a fiber-based temporal super resolving system allowing to improve the resolution of a temporal imaging system. The proposed super resolving concept is based upon translating the field of view multiplexing method that is used to increase resolution in spatial imaging systems from the spatial domain to the temporal domain. In this paper, an optical realization of our proposed system is presented, using optical fibers and electro-optic modulators. In addition, we show how one can apply this method using low-rate electronics for the required modulation. We also show simulation results that demonstrate the high resolution accepted in our method compares to the basic temporal imaging system. Experimental results which demonstrate resolution improvement by a factor of 1.5 based on the proposed method are presented together with an additional experiment that shows the ability to generate the desired modulation with low rate electronics.

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Electro-optic surface field imaging system

10.1109/ppc.1989.767502 ◽

2005 ◽

Cited By ~ 1

Author(s):

L.E. Kingsley ◽

W.R. Donaldson

Keyword(s):

Imaging System ◽

Surface Field ◽

Electro Optic ◽

Field Imaging

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Active Modulating the Intensity of Bifocal Metalens with Electrically Tunable Barium Titanate (BTO) Nanofins

Nanomaterials ◽

10.3390/nano11082023 ◽

2021 ◽

Vol 11 (8) ◽

pp. 2023

Author(s):

Shuai Qin ◽

Hui Huang ◽

Kaiqian Jie ◽

Sirui Zeng ◽

Li Chen ◽

...

Keyword(s):

Barium Titanate ◽

Phase Change Materials ◽

Imaging System ◽

Berry Phase ◽

Focal Point ◽

Incident Light ◽

Imaging Systems ◽

Focal Points ◽

Electro Optic ◽

Electrically Modulated

The multifocal metalens with an adjustable intensity has great potential in many applications such as the multi-imaging system, but it is less studied. In this paper, by combining the electro-optic material barium titanate (BTO) with the Pancharatnam-Berry phase, an electrically modulated bifocal metalens in a visible light band is innovatively proposed. Due to the electro-optic effect, we can control the refractive index of the BTO nanofins to vary between 2.4 and 3.07 by applying different voltages (0–60 V). Thus, the method of modulating the intensity ratio of the two focal points is applying an electric field. It is different from using phase change materials or changing the ellipticity of incident light, the strategies proposed in previous studies. Moreover, when the applied voltage is 0 V or 60 V, the bifocal metalens becomes a single focal metalens with different focal lengths, and the full width at half maximum of each focal point is close to the diffraction limit. It has great potential in applications of optical storage, communication and imaging systems.

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