Nadir and omnidirectional limb imaging spectrometer based on acousto-optic tunable filter

Wang, Xiaoheng; Zhong, Xing; Zhu, Rong; Gao, Fang

doi:10.1016/j.optcom.2018.12.037

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…The imaging spectrometer of traditional atmospheric detection usually uses a prism or grating to split the beam, and can only explore the atmosphere through singlemode single detection. Using the electronic filter developed based on the crystal acoustooptic effect, a novel panoramic imaging spectrometer [176] for atmospheric detection was designed. It can detect the hyperspectral atmospheric data of 10 • nadir FoV, 360 • limb FoV, and 0∼100km limb height.…”

Section: G Panoramic Annular Lensmentioning

confidence: 99%

Review on Panoramic Imaging and Its Applications in Scene Understanding

Gao¹,

Yang²,

Sheng³

et al. 2022

Preprint

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With the rapid development of high-speed communication and artificial intelligence technologies, human perception of real-world scenes is no longer limited to the use of small Field of View (FoV) and low-dimensional scene detection devices. Panoramic imaging emerges as the next generation of innovative intelligent instruments for environmental perception and measurement. However, while satisfying the need for large-FoV photographic imaging, panoramic imaging instruments are expected to have high resolution, no blind area, miniaturization, and multi-dimensional intelligent perception, and can be combined with artificial intelligence methods towards the next generation of intelligent instruments, enabling deeper understanding and more holistic perception of 360 • real-world surrounding environments. Fortunately, recent advances in freeform surfaces, thinplate optics, and metasurfaces provide innovative approaches to address human perception of the environment, offering promising ideas beyond conventional optical imaging. In this review, we begin with introducing the basic principles of panoramic imaging systems, and then describe the architectures, features, and functions of various panoramic imaging systems. Afterwards, we discuss in detail the broad application prospects and great design potential of freeform surfaces, thin-plate optics, and metasurfaces in panoramic imaging. We then provide a detailed analysis on how these techniques can help enhance the performance of panoramic imaging systems. We further offer a detailed analysis of applications of panoramic imaging in scene understanding for autonomous driving and robotics, spanning panoramic semantic image segmentation, panoramic depth estimation, panoramic visual localization, and so on. Finally, we cast a perspective on future potential and research directions for panoramic imaging instruments.

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Section: G Panoramic Annular Lensmentioning

confidence: 99%

Review on Panoramic Imaging and Its Applications in Scene Understanding

Gao¹,

Yang²,

Sheng³

et al. 2022

Preprint

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“…Power splitters [5][6][7][8] are also part of many optical devices, such as wavelength multiplexers [9][10][11][12], optical switches [13][14][15][16], etc. They are widely used in the fields of optical fiber communication [17][18][19][20][21], optical image processing [22][23][24] and optical storage [25,26]. The diffraction order of the beam splitter is related to the incident wavelength and the period of the grating.…”

Section: Introductionmentioning

confidence: 99%

Four equal-intensity laser output and physical analysis generated by reflective grating with a silver plate

Gao¹,

Wang²

2019

Laser Phys.

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In this paper, four equal-intensity laser output is described by reflective grating under normal incidence. When the duty cycle is 0.32 and the period is 3465 nm, the grating structure is analyzed by a rigorous coupled-wave method, where a good four-output beam-splitter effect can be obtained. Each reflective efficiency of the four orders is more than 20% for metasurface structure with a silver plate. The optimized results show that the grating has good performance and good application value in the field of multi-channel laser devices. In addition, the coupling mechanism of four-output reflective gratings can be well explained by the study of overlapping integral and field distribution.

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