Journal articles: 'Infrared imaging. Imaging systems'

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Karim, Mohammad A. "Guest Editorial: Infrared Imaging Systems." Optical Engineering 30, no. 11 (1991): 1647. http://dx.doi.org/10.1117/12.55988.

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Shymanska, Alla V. "Spatial Resolution of Infrared Imaging Systems." International Journal of Applied Physics and Mathematics 6, no. 4 (2016): 207–17. http://dx.doi.org/10.17706/ijapm.2016.6.4.207-217.

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Zhao, Xinyu, Shuqing He, and Mei Chee Tan. "Advancements in infrared imaging platforms: complementary imaging systems and contrast agents." Journal of Materials Chemistry B 5, no. 23 (2017): 4266–75. http://dx.doi.org/10.1039/c7tb00123a.

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Recent advancements in the design of complementary infrared (IR) fluorescence imaging systems and IR-emitting contrast agents are highlighted. The ability to maximize the full performance of any IR imaging platform relies on the thorough understanding of the requirements of the imaging system and physical characteristics of the complementary contrast agents.

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Shankar, Mohan, Rebecca Willett, Nikos Pitsianis, Timothy Schulz, Robert Gibbons, Robert Te Kolste, James Carriere, Caihua Chen, Dennis Prather, and David Brady. "Thin infrared imaging systems through multichannel sampling." Applied Optics 47, no. 10 (January 8, 2008): B1. http://dx.doi.org/10.1364/ao.47.0000b1.

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Wall, B. G., J. L. Koenig, R. Bhargava, and C. M. Snively. "FTIR Imaging of Multiphase Polymer Systems." Microscopy and Microanalysis 5, S2 (August 1999): 992–93. http://dx.doi.org/10.1017/s1431927600018286.

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Fourier Transform Infrared (FTIR) Microspectroscopy is a powerful method to examine and characterize domains down to areas of 10х10 μm2. Spatial concentration maps of chemical species were obtained using apertures to sequentially examine areas on a grid and obtain a map by plotting average spectral absorbance data obtained from each of the areas. New Focal Plane Array (FPA) detectors, composed of a large number (in our case, 64х64) of small detectors arranged in a grid pattern, allow simultaneous collection of infrared radiation at many points from a large spatial region (500х500 μm2 in our case). This allows for a rapid acquisition of chemically specific images from a given area and the examination of several real-time processes. This technique has found a wide variety of applications in multi-phase polymers including polymer laminates, phase separated polymer composites, semi-crystalline polymers and blends, and solvent diffusion into polymers have been the main areas of interest in non-biological IR studies using FPA detection. We present some of the recent work in our group on various multi-phase polymer systems using FPA based infrared spectroscopy.

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TENNANT, W. E. "LIMITS OF INFRARED IMAGING." International Journal of High Speed Electronics and Systems 20, no. 03 (September 2011): 529–39. http://dx.doi.org/10.1142/s0129156411006829.

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The background photon shot noise, induced by the signal itself and all other in-band surroundings, provides the fundamental infrared imaging sensitivity limit (background limited performance or BLIP). Optical diffraction constrains resolution angle to values greater than the ratio of the detection wavelength to the optics diameter. Imaging technology tries to attain BLIP at spatial frequencies approaching the diffraction limit while minimizing system size, weight, power, and life-cycle cost. To minimize costs, detector array technology must raise the detector operating temperature while keeping dark currents and other noise mechanisms below background shot noise. This requires reducing material and process defects. Recently HgCdTe has seen the MWIR-LWIR device dark currents to be limited only by fundamental mechanisms over a wide range of temperatures and wavelengths. Novel materials systems (e.g. Type-II superlattices) in theory have even lower fundamental limits than HgCdTe , but as yet lag in demonstrated performance. At least for now HgCdTe provides a convenient well-characterized benchmark and gives insight into further improvement possibilities Infrared imaging technology must also exploit advanced processing and packaging techniques to reduce detector pitch to a few wavelengths of detected light. Mid- and long-wave infrared imaging arrays with ~15μm detector dimensions are now approaching this goal.

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Yang, Shuowen, Xiang Yan, Hanlin Qin, Qingjie Zeng, Yi Liang, Henry Arguello, and Xin Yuan. "Mid-Infrared Compressive Hyperspectral Imaging." Remote Sensing 13, no. 4 (February 17, 2021): 741. http://dx.doi.org/10.3390/rs13040741.

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Hyperspectral imaging (HSI) has been widely investigated within the context of computational imaging due to the high dimensional challenges for direct imaging. However, existing computational HSI approaches are mostly designed for the visible to near-infrared waveband, whereas less attention has been paid to the mid-infrared spectral range. In this paper, we report a novel mid-infrared compressive HSI system to extend the application domain of mid-infrared digital micromirror device (MIR-DMD). In our system, a modified MIR-DMD is combined with an off-the-shelf infrared spectroradiometer to capture the spatial modulated and compressed measurements at different spectral channels. Following this, a dual-stage image reconstruction method is developed to recover infrared hyperspectral images from these measurements. In addition, a measurement without any coding is used as the side information to aid the reconstruction to enhance the reconstruction quality of the infrared hyperspectral images. A proof-of-concept setup is built to capture the mid-infrared hyperspectral data of 64 pixels × 48 pixels × 100 spectral channels ranging from 3 to 5 μm, with the acquisition time within one minute. To the best of our knowledge, this is the first mid-infrared compressive hyperspectral imaging approach that could offer a less expensive alternative to conventional mid-infrared hyperspectral imaging systems.

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Lettington, A. H., and Q. H. Hong. "An objective MRTD for discrete infrared imaging systems." Measurement Science and Technology 4, no. 10 (October 1, 1993): 1106–10. http://dx.doi.org/10.1088/0957-0233/4/10/013.

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Jayawardhana, Ray, R. Scott Fisher, Charles M. Telesco, Robert K. Piña, David Barrado y. Navascués, Lee W. Hartmann, and Giovanni G. Fazio. "Mid-Infrared Imaging of Candidate Vega-like Systems." Astronomical Journal 122, no. 4 (October 2001): 2047–54. http://dx.doi.org/10.1086/322092.

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Koenig, Jack L., and John P. Bobiak. "Raman and Infrared Imaging of Dynamic Polymer Systems." Macromolecular Materials and Engineering 292, no. 7 (July 12, 2007): 801–16. http://dx.doi.org/10.1002/mame.200700018.

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Colarusso, Pina, Linda H. Kidder, Ira W. Levin, James C. Fraser, John F. Arens, and E. Neil Lewis. "Infrared Spectroscopic Imaging: From Planetary to Cellular Systems." Applied Spectroscopy 52, no. 3 (March 1998): 106A—120A. http://dx.doi.org/10.1366/0003702981943545.

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Tian, Qijie, Songtao Chang, Fengyun He, Zhou Li, and Yanfeng Qiao. "Spherical warm shield design for infrared imaging systems." Infrared Physics & Technology 85 (September 2017): 66–73. http://dx.doi.org/10.1016/j.infrared.2017.05.013.

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Sweetser, Kevin. "Infrared imaging with ferroelectrics." Integrated Ferroelectrics 17, no. 1-4 (September 1997): 349–58. http://dx.doi.org/10.1080/10584589708013009.

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Zhang, Bozhi, Meijing Gao, Paul L. Rosin, Xianfang Sun, Qiuyue Chang, Qichong Yan, and Yucheng Shang. "Research on Performance Evaluation and Optimization Theory for Thermal Microscope Imaging Systems." Applied Sciences 11, no. 13 (June 25, 2021): 5897. http://dx.doi.org/10.3390/app11135897.

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Infrared imaging theory is an important theoretical basis for the design of infrared imaging systems, but there is no research on infrared imaging theory for designing thermal microscope imaging systems. Therefore, we studied the performance evaluation and optimization theory of thermal microscope imaging systems. In this paper, we analyzed the difference in spectral radiant flux between thermal microscope imaging and telephoto thermal imaging. The expression of signal-to-noise ratio of the output image of the thermal microscope imaging systems was derived, based on the analysis of the characteristics of thermal microscope imaging. We studied the performance evaluation model of thermal microscope imaging systems based on the minimum resolvable temperature difference and the minimum detectable temperature difference. Simulation and analysis of different detectors (ideal photon detector and ideal thermal detector) were also carried out. Finally, based on the conclusion of theoretical research, we carried out a system design and image acquisition experiment. The results show that the theoretical study of thermal microscope imaging systems in this paper can provide reference for the performance evaluation and optimization of thermal microscope imaging systems.

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Remky, A., E. Beausencourt, M. E. Hartnett, C. L. Trempe, O. Arend, and A. E. Elsner. "Infrared imaging of cystoid macular edema." Graefe's Archive for Clinical and Experimental Ophthalmology 237, no. 11 (October 12, 1999): 897–901. http://dx.doi.org/10.1007/s004170050383.

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MUKAI, Kiyofumi, Byron J. PETERSON, Shwetang N. PANDYA, Ryuichi SANO, and Muneji ITOMI. "Improvement of Infrared Imaging Video Bolometer Systems in LHD." Plasma and Fusion Research 9 (2014): 3402037. http://dx.doi.org/10.1585/pfr.9.3402037.

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Chang Song-Tao, Sun Zhi-Yuan, Zhang Yao-Yu, and Zhu Wei. "Internal stray radiation measurement for cooled infrared imaging systems." Acta Physica Sinica 64, no. 5 (2015): 050702. http://dx.doi.org/10.7498/aps.64.050702.

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Keshavarzi, Sassan, Armon Bolour, Karen Mendez, Behzad Behrouzi, Aimen S. Kasasbeh, and Michael L. Levy. "Thermal Properties of Contemporary Bipolar Systems Using Infrared Imaging." World Neurosurgery 83, no. 3 (March 2015): 376–81. http://dx.doi.org/10.1016/j.wneu.2014.10.007.

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Merryman, S. A., and R. M. Nelms. "Diagnostic technique for power systems utilizing infrared thermal imaging." IEEE Transactions on Industrial Electronics 42, no. 6 (1995): 615–28. http://dx.doi.org/10.1109/41.475502.

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Geißler, K., G. Chauvin, and M. F. Sterzik. "Mid-infrared imaging of brown dwarfs in binary systems." Astronomy & Astrophysics 480, no. 1 (January 9, 2008): 193–98. http://dx.doi.org/10.1051/0004-6361:20078229.

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Falahkheirkhah, Kianoush, Kevin Yeh, Shachi Mittal, Luke Pfister, and Rohit Bhargava. "Deep learning-based protocols to enhance infrared imaging systems." Chemometrics and Intelligent Laboratory Systems 217 (October 2021): 104390. http://dx.doi.org/10.1016/j.chemolab.2021.104390.

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Phal, Yamuna, Kevin Yeh, and Rohit Bhargava. "Design Considerations for Discrete Frequency Infrared Microscopy Systems." Applied Spectroscopy 75, no. 9 (April 20, 2021): 1067–92. http://dx.doi.org/10.1177/00037028211013372.

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Discrete frequency infrared chemical imaging is transforming the practice of microspectroscopy by enabling a diversity of instrumentation and new measurement capabilities. While a variety of hardware implementations have been realized, design considerations that are unique to infrared (IR) microscopes have not yet been compiled in literature. Here, we describe the evolution of IR microscopes, provide rationales for design choices, and catalog some major considerations for each of the optical components in an imaging system. We analyze design choices that use these components to optimize performance, under their particular constraints, while providing illustrative examples. We then summarize a framework to assess the factors that determine an instrument’s performance mathematically. Finally, we provide a validation approach by enumerating performance metrics that can be used to evaluate the capabilities of imaging systems or suitability for specific intended applications. Together, the presented concepts and examples should aid in understanding available instrument configurations, while guiding innovations in design of the next generation of IR chemical imaging spectrometers.

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Freitas, Raul O., Adrian Cernescu, Anders Engdahl, Agnes Paulus, João E. Levandoski, Isak Martinsson, Elke Hebisch, et al. "Nano-Infrared Imaging of Primary Neurons." Cells 10, no. 10 (September 27, 2021): 2559. http://dx.doi.org/10.3390/cells10102559.

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Alzheimer’s disease (AD) accounts for about 70% of neurodegenerative diseases and is a cause of cognitive decline and death for one-third of seniors. AD is currently underdiagnosed, and it cannot be effectively prevented. Aggregation of amyloid-β (Aβ) proteins has been linked to the development of AD, and it has been established that, under pathological conditions, Aβ proteins undergo structural changes to form β-sheet structures that are considered neurotoxic. Numerous intensive in vitro studies have provided detailed information about amyloid polymorphs; however, little is known on how amyloid β-sheet-enriched aggregates can cause neurotoxicity in relevant settings. We used scattering-type scanning near-field optical microscopy (s-SNOM) to study amyloid structures at the nanoscale, in individual neurons. Specifically, we show that in well-validated systems, s-SNOM can detect amyloid β-sheet structures with nanometer spatial resolution in individual neurons. This is a proof-of-concept study to demonstrate that s-SNOM can be used to detect Aβ-sheet structures on cell surfaces at the nanoscale. Furthermore, this study is intended to raise neurobiologists’ awareness of the potential of s-SNOM as a tool for analyzing amyloid β-sheet structures at the nanoscale in neurons without the need for immunolabeling.

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Mickan, S. P., and X. C. Zhang. "T-Ray Sensing and Imaging." International Journal of High Speed Electronics and Systems 13, no. 02 (June 2003): 601–76. http://dx.doi.org/10.1142/s0129156403001843.

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Terahertz (THz) radiation occupies part of the electromagnetic spectrum between the infrared and microwave bands. Until recently, technology at THz frequencies was under-developed compared to the rest of the electromagnetic spectrum, leaving a gap between millimeter waves and the far-infrared (FIR). In the past decade, interest in the THz gap has been increased by the development of ultrafast laser-based T-ray systems and their demonstration of diffraction-limited spatial resolution, picosecond temporal resolution, DC-THz spectral bandwidth and signal-to-noise ratios above 104. This chapter reviews the development, the state of the art and the applications of T-ray spectrometers. Continuous-wave (CW) THz-frequency sources and detectors are briefly introduced in comparison to ultrafast pulsed THz systems. An emphasis is placed on experimental applications of T-rays to sensing and imaging, with a view to the continuing advance of technologies and applications in the THz band.

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Sajedi, Salar, Hamid Sabet, and Hak Soo Choi. "Intraoperative biophotonic imaging systems for image-guided interventions." Nanophotonics 8, no. 1 (December 14, 2018): 99–116. http://dx.doi.org/10.1515/nanoph-2018-0134.

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AbstractBiophotonic imaging has revolutionized the operation room by providing surgeons intraoperative image-guidance to diagnose tumors more efficiently and to resect tumors with real-time image navigation. Among many medical imaging modalities, near-infrared (NIR) light is ideal for image-guided surgery because it penetrates relatively deeply into living tissue, while nuclear imaging provides quantitative and unlimited depth information. It is therefore ideal to develop an integrated imaging system by combining NIR fluorescence and gamma-positron imaging to provide surgeons with highly sensitive and quantitative detection of diseases, such as cancer, in real-time without changing the look of the surgical field. The focus of this review is to provide recent progress in intraoperative biophotonic imaging systems, NIR fluorescence imaging and intraoperative nuclear imaging devices, and their future perspectives for image-guided interventions.

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Zhu Jiacheng, 朱嘉诚, 陆伟奇 Lu Weiqi, 赵知诚 Zhao Zhicheng, 陈新华 Chen Xinhua, and 沈为民 Shen Weimin. "静止轨道中波红外成像光谱仪分光成像系统." Acta Optica Sinica 41, no. 11 (2021): 1122001. http://dx.doi.org/10.3788/aos202141.1122001.

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Carr, Jessica A., Daniel Franke, Justin R. Caram, Collin F. Perkinson, Mari Saif, Vasileios Askoxylakis, Meenal Datta, et al. "Shortwave infrared fluorescence imaging with the clinically approved near-infrared dye indocyanine green." Proceedings of the National Academy of Sciences 115, no. 17 (April 6, 2018): 4465–70. http://dx.doi.org/10.1073/pnas.1718917115.

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Fluorescence imaging is a method of real-time molecular tracking in vivo that has enabled many clinical technologies. Imaging in the shortwave IR (SWIR; 1,000–2,000 nm) promises higher contrast, sensitivity, and penetration depths compared with conventional visible and near-IR (NIR) fluorescence imaging. However, adoption of SWIR imaging in clinical settings has been limited, partially due to the absence of US Food and Drug Administration (FDA)-approved fluorophores with peak emission in the SWIR. Here, we show that commercially available NIR dyes, including the FDA-approved contrast agent indocyanine green (ICG), exhibit optical properties suitable for in vivo SWIR fluorescence imaging. Even though their emission spectra peak in the NIR, these dyes outperform commercial SWIR fluorophores and can be imaged in the SWIR, even beyond 1,500 nm. We show real-time fluorescence imaging using ICG at clinically relevant doses, including intravital microscopy, noninvasive imaging in blood and lymph vessels, and imaging of hepatobiliary clearance, and show increased contrast compared with NIR fluorescence imaging. Furthermore, we show tumor-targeted SWIR imaging with IRDye 800CW-labeled trastuzumab, an NIR dye being tested in multiple clinical trials. Our findings suggest that high-contrast SWIR fluorescence imaging can be implemented alongside existing imaging modalities by switching the detection of conventional NIR fluorescence systems from silicon-based NIR cameras to emerging indium gallium arsenide-based SWIR cameras. Using ICG in particular opens the possibility of translating SWIR fluorescence imaging to human clinical applications. Indeed, our findings suggest that emerging SWIR-fluorescent in vivo contrast agents should be benchmarked against the SWIR emission of ICG in blood.

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Ly, Angelica, Lisa Nivison‐Smith, Nagi Assaad, and Michael Kalloniatis. "Infrared reflectance imaging in age‐related macular degeneration." Ophthalmic and Physiological Optics 36, no. 3 (April 25, 2016): 303–16. http://dx.doi.org/10.1111/opo.12283.

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Polavarapu, Prasad L., Gang-Chi Chen, and Zhengyu Deng. "Polarization-Division Interferometry: Approach for Biomedical Infrared Imaging." Applied Spectroscopy 48, no. 11 (November 1994): 1403–9. http://dx.doi.org/10.1366/0003702944028128.

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Conventional Fourier transform infrared absorption spectroscopy is not suitable for most biological and biomedical studies because of strong infrared absorption by water. For wavelengths where samples absorb more than one unit of absorbance, most measurements with conventional Fourier transform infrared spectroscopy suffer from photometric inaccuracies. However, water is not sensitive to the polarization of the infrared light, but living systems can exhibit differential interaction to the polarized nature of light. In a method where the measured signal directly represents the difference in polarized absorptions, the water component becomes spectrally transparent (although the number of photons reaching the detector is still attenuated by water) and facilitates the measurements appropriate for biological systems. Verification of this principle is reported here for the use of a new midinfrared polarizationdivision interferometer developed in our laboratory. With the amide I vibrational band of a nylonll film which overlaps with the water absorption band at 1647 cm-', the associated dichroism is measured in the presence of varying amounts of interfering water absorption. It is found that dichroism can be measured even in the presence of strong interfering absorption from water. This observation suggests that the present method provides a unique approach, as well as the necessary impetus, for initiating biomedical infrared imaging studies.

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Yamada, Yukio, Hiroaki Suzuki, and Yutaka Yamashita. "Time-Domain Near-Infrared Spectroscopy and Imaging: A Review." Applied Sciences 9, no. 6 (March 17, 2019): 1127. http://dx.doi.org/10.3390/app9061127.

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This article reviews the past and current statuses of time-domain near-infrared spectroscopy (TD-NIRS) and imaging. Although time-domain technology is not yet widely employed due to its drawbacks of being cumbersome, bulky, and very expensive compared to commercial continuous wave (CW) and frequency-domain (FD) fNIRS systems, TD-NIRS has great advantages over CW and FD systems because time-resolved data measured by TD systems contain the richest information about optical properties inside measured objects. This article focuses on reviewing the theoretical background, advanced theories and methods, instruments, and studies on clinical applications for TD-NIRS including some clinical studies which used TD-NIRS systems. Major events in the development of TD-NIRS and imaging are identified and summarized in chronological tables and figures. Finally, prospects for TD-NIRS in the near future are briefly described.

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Rogalski, A., and K. Chrzanowski. "Infrared Devices And Techniques (Revision)." Metrology and Measurement Systems 21, no. 4 (December 1, 2014): 565–618. http://dx.doi.org/10.2478/mms-2014-0057.

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Abstract The main objective of this paper is to produce an applications-oriented review covering infrared techniques and devices. At the beginning infrared systems fundamentals are presented with emphasis on thermal emission, scene radiation and contrast, cooling techniques, and optics. Special attention is focused on night vision and thermal imaging concepts. Next section concentrates shortly on selected infrared systems and is arranged in order to increase complexity; from image intensifier systems, thermal imaging systems, to space-based systems. In this section are also described active and passive smart weapon seekers. Finally, other important infrared techniques and devices are shortly described, among them being: non-contact thermometers, radiometers, LIDAR, and infrared gas sensors.

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Connolly, Christine. "The use of infrared imaging in industry." Assembly Automation 25, no. 3 (September 2005): 191–95. http://dx.doi.org/10.1108/01445150510610908.

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Vortman, J. G., and A. Bar-Lev. "Improved Minimum Resolvable Temperature Difference Model For Infrared Imaging Systems." Optical Engineering 26, no. 6 (June 1, 1987): 266492. http://dx.doi.org/10.1117/12.7974104.

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Branchitta, Francesco. "Dynamic-range compression and contrast enhancement in infrared imaging systems." Optical Engineering 47, no. 7 (July 1, 2008): 076401. http://dx.doi.org/10.1117/1.2956655.

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Krapels, Keith, Ronald G. Driggers, Eddie Jacobs, Stephen Burks, and Susan Young. "Characteristics of infrared imaging systems that benefit from superresolution reconstruction." Applied Optics 46, no. 21 (July 6, 2007): 4594. http://dx.doi.org/10.1364/ao.46.004594.

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Feng, Bin, Zelin Shi, Zheng Chang, Haizheng Liu, and Yaohong Zhao. "110 °C range athermalization of wavefront coding infrared imaging systems." Infrared Physics & Technology 85 (September 2017): 157–62. http://dx.doi.org/10.1016/j.infrared.2017.05.020.

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Zhang, ZhouFeng, YongJun Xie, QinYe Yin, and FuZeng Kang. "Design and testing of infrared diffractive telescope imaging optical systems." Optik 126, no. 24 (December 2015): 5740–43. http://dx.doi.org/10.1016/j.ijleo.2015.09.079.

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Sung, Hsin-Yueh, Sidney S. Yang, and Horng Chang. "Software lens compensation applied to athermalization of infrared imaging systems." Optical Review 16, no. 3 (May 2009): 313–17. http://dx.doi.org/10.1007/s10043-009-0057-9.

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Jung, Doyoung, Suhyeon Park, Changho Lee, and Hyungwoo Kim. "Recent Progress on Near-Infrared Photoacoustic Imaging: Imaging Modality and Organic Semiconducting Agents." Polymers 11, no. 10 (October 16, 2019): 1693. http://dx.doi.org/10.3390/polym11101693.

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Over the past few decades, the photoacoustic (PA) effect has been widely investigated, opening up diverse applications, such as photoacoustic spectroscopy, estimation of chemical energies, or point-of-care detection. Notably, photoacoustic imaging (PAI) has also been developed and has recently received considerable attention in bio-related or clinical imaging fields, as it now facilitates an imaging platform in the near-infrared (NIR) region by taking advantage of the significant advancement of exogenous imaging agents. The NIR PAI platform now paves the way for high-resolution, deep-tissue imaging, which is imperative for contemporary theragnosis, a combination of precise diagnosis and well-timed therapy. This review reports the recent progress on NIR PAI modality, as well as semiconducting contrast agents, and outlines the trend in current NIR imaging and provides further direction for the prospective development of PAI systems.

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Lewis, E. Neil, and Ira W. Levin. "Vibrational Spectroscopic Microscopy: Raman, Near-Infrared and Mid-Infrared Imaging Techniques." Microscopy and Microanalysis 1, no. 1 (February 1995): 35–46. http://dx.doi.org/10.1017/s1431927695110351.

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New instrumental approaches for performing vibrational Raman, near-infrared and mid-infrared spectroscopic imaging microscopy are described. The instruments integrate imaging quality filters such as acousto-optic tunable filters (AOTFs), with visible charge-coupled device (CCD) and infrared focal-plane array detectors. These systems are used in conjunction with infinity-corrected, refractive microscopes for operation in the visible and near-infrared spectral regions and with Cassegrainian reflective optics for operation in the mid-infrared spectral interval. Chemically specific images at moderate spectral resolution (2 nm) and high spatial resolution (1 μm) can be collected rapidly and noninvasively. Image data are presented containing 128 × 128 pixels, although significantly larger format images can be collected in approximately the same time. The instruments can be readily configured for both absorption and reflectance spectroscopies. We present Raman emission images of polystyrene microspheres and a lipid/amino acid mixture and near-infrared images of onion epidermis and a hydrated phospholipid dispersion. Images generated from mid-infrared spectral data are presented for a KBr disk containing nonhomogeneous domains of lipid and for 50-μm slices of monkey cerebellum. These are the first results illustrating the use of infrared focal-plane array detectors as chemically specific spectroscopic imaging devices and demonstrating their application in biomolecular areas. Extensions and future applications of the various vibrational spectroscopic imaging techniques are discussed.

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Li, Ni, and Qing Hua Liu. "Research on Infrared Imaging Modeling and Simulation of Armored Vehicles." Applied Mechanics and Materials 651-653 (September 2014): 2372–76. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.2372.

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Real-time infrared imaging technology with high fidelity is greatly desired in current simulation systems. An integrated infrared imaging simulation system including infrared radiation characteristics whose model was established by modeling different components of an armored vehicle respectively, atmospheric transmission effects and infrared sensor effects that mainly comprises frequency domain effects and spatial effects was established in this paper. The final infrared image can be generated by taking advantage of the simulation system. The simulation carried out in this paper has proved the validity and effectiveness of the established models, which could be of great significance in satisfying the requirements of dynamic infrared image generation in a photoelectric warfare simulation system.

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Lee, Seung Hyun, Yu Hua Quan, Min Sub Kim, Ki Hyeok Kwon, Byeong Hyeon Choi, Hyun Koo Kim, and Beop-Min Kim. "Design and Testing of Augmented Reality-Based Fluorescence Imaging Goggle for Intraoperative Imaging-Guided Surgery." Diagnostics 11, no. 6 (May 21, 2021): 927. http://dx.doi.org/10.3390/diagnostics11060927.

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The different pathways between the position of a near-infrared camera and the user’s eye limit the use of existing near-infrared fluorescence imaging systems for tumor margin assessments. By utilizing an optical system that precisely matches the near-infrared fluorescence image and the optical path of visible light, we developed an augmented reality (AR)-based fluorescence imaging system that provides users with a fluorescence image that matches the real-field, without requiring any additional algorithms. Commercial smart glasses, dichroic beam splitters, mirrors, and custom near-infrared cameras were employed to develop the proposed system, and each mount was designed and utilized. After its performance was assessed in the laboratory, preclinical experiments involving tumor detection and lung lobectomy in mice and rabbits by using indocyanine green (ICG) were conducted. The results showed that the proposed system provided a stable image of fluorescence that matched the actual site. In addition, preclinical experiments confirmed that the proposed system could be used to detect tumors using ICG and evaluate lung lobectomies. The AR-based intraoperative smart goggle system could detect fluorescence images for tumor margin assessments in animal models, without disrupting the surgical workflow in an operating room. Additionally, it was confirmed that, even when the system itself was distorted when worn, the fluorescence image consistently matched the actual site.

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Corsi, Carlo. "Infrared: A Key Technology for Security Systems." Advances in Optical Technologies 2012 (December 4, 2012): 1–15. http://dx.doi.org/10.1155/2012/838752.

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Infrared science and technology has been, since the first applications, mainly dedicated to security and surveillance especially in military field, besides specialized techniques in thermal imaging for medical diagnostic and building structures and recently in energy savings and aerospace context. Till recently the security applications were mainly based on thermal imaging as surveillance and warning military systems. In all these applications the advent of room temperature, more reliable due to the coolers avoidance, low cost, and, overall, completely integrable with Silicon technology FPAs, especially designed and tailored for specific applications, smart sensors, has really been impacted with revolutionary and new ideas and system concepts in all the infrared fields, especially for security applications. Lastly, the advent of reliable Infrared Solid State Laser Sources, operating up to the Long Infrared Wavelength Band and the new emerging techniques in Far Infrared Submillimeter Terahertz Bands, has opened wide and new areas for developing new, advanced security systems. A review of all the items with evidence of the weak and the strong points of each item, especially considering possible future developments, will be reported and discussed.

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Gibin, I. S., V. I. Kozik, and E. S. Nezhevenko. "Generation of Dynamic Scenes for Testing Infrared Imaging Systems in the Far Infrared Range." Optoelectronics, Instrumentation and Data Processing 54, no. 1 (January 2018): 7–12. http://dx.doi.org/10.3103/s8756699018010028.

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Zhao, Huijie, Zefu Xu, Hongzhi Jiang, and Guorui Jia. "SWIR AOTF Imaging Spectrometer Based on Single-pixel Imaging." Sensors 19, no. 2 (January 18, 2019): 390. http://dx.doi.org/10.3390/s19020390.

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An acousto-optic tunable filter (AOTF) is a new type of mono-wavelength generator, and an AOTF imaging spectrometer can obtain spectral images of interest. However, due to the limitation of AOTF aperture and acceptance angle, the light passing through the AOTF imaging spectrometer is weak, especially in the short-wave infrared (SWIR) region. In weak light conditions, the noise of a non-deep cooling mercury cadmium telluride (MCT) detector is high compared to the camera response. Thus, effective spectral images cannot be obtained. In this study, the single-pixel imaging (SPI) technique was applied to the AOTF imaging spectrometer, which can obtain spectral images due to the short-focus lens that collects light into a small area. In our experiment, we proved that the irradiance of a short-focus system is much higher than that of a long-focus system in relation to the AOTF imaging spectrometer. Then, an SPI experimental setup was built to obtain spectral images in which traditional systems cannot obtain. This work provides an efficient way to detect spectral images from 1000 to 2200 nm.

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Zhang, Delong, Chen Li, Chi Zhang, Mikhail N. Slipchenko, Gregory Eakins, and Ji-Xin Cheng. "Depth-resolved mid-infrared photothermal imaging of living cells and organisms with submicrometer spatial resolution." Science Advances 2, no. 9 (September 2016): e1600521. http://dx.doi.org/10.1126/sciadv.1600521.

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Chemical contrast has long been sought for label-free visualization of biomolecules and materials in complex living systems. Although infrared spectroscopic imaging has come a long way in this direction, it is thus far only applicable to dried tissues because of the strong infrared absorption by water. It also suffers from low spatial resolution due to long wavelengths and lacks optical sectioning capabilities. We overcome these limitations through sensing vibrational absorption–induced photothermal effect by a visible laser beam. Our mid-infrared photothermal (MIP) approach reached 10 μM detection sensitivity and submicrometer lateral spatial resolution. This performance has exceeded the diffraction limit of infrared microscopy and allowed label-free three-dimensional chemical imaging of live cells and organisms. Distributions of endogenous lipid and exogenous drug inside single cells were visualized. We further demonstrated in vivo MIP imaging of lipids and proteins inCaenorhabditis elegans. The reported MIP imaging technology promises broad applications from monitoring metabolic activities to high-resolution mapping of drug molecules in living systems, which are beyond the reach of current infrared microscopy.

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Long Wan, 龙弯, 王睿 Wang Rui, and 许中杰 Xu ZhongJie. "Research Status and development of Crosstalk in the Infrared Imaging Systems." Laser & Optoelectronics Progress 52, no. 10 (2015): 100004. http://dx.doi.org/10.3788/lop52.100004.

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Yuzhakova, Anastasia, Liya Zhukova, Natalia Akif’eva, Dmitrii Krasnov, and Alexander Korsakov. "Application of infrared polycrystalline fibers in thermal imaging temperature control systems." Sensors and Actuators A: Physical 314 (October 2020): 112237. http://dx.doi.org/10.1016/j.sna.2020.112237.

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Meza, Pablo, Guillermo Machuca, Sergio Torres, Cesar San Martin, and Esteban Vera. "Simultaneous digital super-resolution and nonuniformity correction for infrared imaging systems." Applied Optics 54, no. 21 (July 17, 2015): 6508. http://dx.doi.org/10.1364/ao.54.006508.

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Feng, Bin, Zelin Shi, Baoshu Xu, Chengshuo Zhang, and Xiaodong Zhang. "ZnSe-material phase mask applied to athermalization of infrared imaging systems." Applied Optics 55, no. 21 (July 18, 2016): 5715. http://dx.doi.org/10.1364/ao.55.005715.

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Journal articles on the topic 'Infrared imaging. Imaging systems'

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