Optical Design in Night Vision Imaging

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: closed (10 January 2024) | Viewed by 2239

Special Issue Editors


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Guest Editor
School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Interests: optical design; optical device and material; photoelectronic imaging
School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Interests: optical image processing; computational imaging; artificial intelligence
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Special Issue Information

Dear Colleagues,

Night vision imaging technology plays a crucial role in various modern optics-related applications, such as night surveillance, assisted driving, and underwater detection. To capture high-quality images in low-light-level conditions, the refined optical design of low-illumination imaging is particularly important, including both vacuum device-based imaging (e.g., image intensifier) and solid state device-based imaging (e.g., EMCCD, ICMOS, qCOMS). Optical designs for other types of significant night vision imaging, such as infrared imaging and spectral imaging, are also encouraged. Of course, the design of new optical modules for night vision imaging is also welcome. In addition, optical signal and image processing technologies, which are closely related to night vision imaging, are included in the scope. This Special Issue (SI) is devoted to the above issues, and its relevant topics thus include (but are not limited to):

  • optical design;
  • illumination design;
  • optical path design;
  • imaging system optimization;
  • optical material;
  • optical coating;
  • diffraction grating;
  • freeform optics;
  • night vision image processing and display.

Prof. Dr. Guohua Gu
Dr. Minjie Wan
Guest Editors

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Published Papers (1 paper)

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Research

16 pages, 7880 KiB  
Article
High Light Efficiency Spectral Polarization Imaging Method Based on Mach–Zehnder Structured Liquid Crystal Tunable Filters and Variable Retarders
by Lixin Chen, Shiyuan Zhang, Wenbin Zheng and Lishuang Yao
Photonics 2023, 10(7), 765; https://doi.org/10.3390/photonics10070765 - 3 Jul 2023
Cited by 1 | Viewed by 1721
Abstract
Liquid crystal tunable filters (LCTFs) are extensively used in hyperspectral imaging systems to obtain spectral information of target scenes. However, a typical LCTF can only filter linearly polarized light, greatly reducing the transmittance of the system and limiting its application in spectral and [...] Read more.
Liquid crystal tunable filters (LCTFs) are extensively used in hyperspectral imaging systems to obtain spectral information of target scenes. However, a typical LCTF can only filter linearly polarized light, greatly reducing the transmittance of the system and limiting its application in spectral and polarization imaging. In this paper, a spectropolarimeter using Mach–Zehnder structured LCTFs (MZ-LCTFs) combined with liquid crystal variable retarders (LCVRs) is proposed. The polarized beam splitter (PBS) can make full use of the two polarization components of the incident light to improve the transmittance of the system. Specifically, the results show that the mean pixel intensity (MPI) of spectral images is improved by 93.48% compared to a typical LCTF. Subsequently, the average signal to noise ratio (SNR) of filtered and unfiltered images when simultaneously using polarization S and P channels is increased by 2.59 dB compared to a single channel. In addition, the average Standard Deviations (STDs) of DoLP and DoCP are 0.016 and 0.018, respectively. The proposed method has the potential to be applied to obtain polarization information with high optical efficiency and a full spectrum in a wide band. Full article
(This article belongs to the Special Issue Optical Design in Night Vision Imaging)
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