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Journal articles on the topic 'Focal Plane Array (FPA)'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 January 2023

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1

Sperline, R. P., A. K. Knight, C. A. Gresham, D. W. Koppenaal, G. M. Hieftje, and M. B. Denton. "Read-Noise Characterization of Focal Plane Array Detectors via Mean-Variance Analysis." Applied Spectroscopy 59, no. 11 (2005): 1315–23. http://dx.doi.org/10.1366/000370205774783250.

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Mean-variance analysis is described as a method for characterization of the read-noise and gain of focal plane array (FPA) detectors, including charge-coupled devices (CCDs), charge-injection devices (CIDs), and complementary metal-oxide-semiconductor (CMOS) multiplexers (infrared arrays). Practical FPA detector characterization is outlined. The nondestructive readout capability available in some CIDs and FPA devices is discussed as a means for signal-to-noise ratio improvement. Derivations of the equations are fully presented to unify understanding of this method by the spectroscopic communit

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2

Alfonso, Jeison Marín, Leonardo Betancur Agudelo, and Henry Arguello Fuentes. "Further compression of focal plane array in compressive spectral imaging architectures." Revista Tecnura 21, no. 52 (2017): 45. http://dx.doi.org/10.14483/udistrital.jour.tecnura.2017.2.a03.

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Contexto: Las imágenes híper-espectrales 3D de alta resolución pueden ser capturadas en una imagen 2D mediante técnicas basadas en “sensado compresivo” (compressive sensing, en inglés). Entre estas técnicas, hay una denominada Compressive Spectral Imaging (CSI), de la cual se han propuesto diversas arquitecturas en los últimos ocho años. Una cámara óptica especialmente diseñada captura la información espacio-espectral de la escena e imprime proyecciones en un plano focal 2D (Focal Plane Array, FPA). Estas muestras se pueden transmitir o almacenar; luego la imagen original puede ser reconstruid

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3

GOLDBERG, ARNOLD. "IMAGING PERFORMANCE OF ADVANCED QWIP FOCAL PLANE ARRAYS." International Journal of High Speed Electronics and Systems 12, no. 03 (2002): 659–90. http://dx.doi.org/10.1142/s0129156402001666.

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Since the first demonstration of the quantum well infrared photodetector (QWIP) in the 1980s, there has been much progress in the application of QWIPs to the production infrared (IR) imaging systems. At this time, focal plane arrays (FPAs) made from QWIPs are readily available for insertion in IR cameras with formats as large as 640 × 480 pixels. Several organizations now have commercially available IR camera systems using QWIPs. In spite of the low single-pixel quantum efficiency relative to MCT, excellent IR imagery has been demonstrated with large format (640 × 480 pixels) single-band and m

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Honda, Reo, Meguya Ryu, Masayuki Moritake, et al. "Infrared Polariscopy Imaging of Linear Polymeric Patterns with a Focal Plane Array." Nanomaterials 9, no. 5 (2019): 732. http://dx.doi.org/10.3390/nano9050732.

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Polariscopy is demonstrated using hyperspectral imaging with a focal plane array (FPA) detector in the infrared (IR) spectral region under illumination by thermal and synchrotron light sources. FPA Fourier-transform IR (FTIR) imaging microspectroscopy is useful for monitoring real time changes at specific absorption bands when combined with a high brightness synchrotron source. In this study, several types of samples with unique structural motifs were selected and used for assessing the capability of polariscopy under this FPA-FTIR imaging technique. It was shown that the time required for pol

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5

Klipstein, P. C., E. Avnon, Y. Benny, et al. "Long Wave Infrared Type II Superlattice Focal Plane Array Detector." Defence Science Journal 67, no. 2 (2017): 135. http://dx.doi.org/10.14429/dsj.67.11182.

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The XBn/XBp family of barrier detectors enables diffusion limited dark currents comparable with HgxCd1-xTe Rule-07 and high quantum efficiencies. SCD’s XBp type II superlattice (T2SL) detector contains InAs/GaSb and InAs/AlSb T2SLs, and was designed for the long wave infrared (LWIR) atmospheric window using k · p based modeling of the energy bands and photo-response. Wafers are grown by molecular beam epitaxy and are fabricated into focal plane array (FPA) detectors using standard FPA processes, including wet and dry etching, indium bump hybridisation, under-fill, and back-side polishing. The

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Lyu, Nanfang, Jian Zuo, Yuanmeng Zhao, and Cunlin Zhang. "Terahertz Synthetic Aperture Imaging with a Light Field Imaging System." Electronics 9, no. 5 (2020): 830. http://dx.doi.org/10.3390/electronics9050830.

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In terahertz imaging systems based on Gaussian beam active illumination and focal plane array detectors, severe image distortion has been observed, which significantly reduces the resolving power of the imaging system. To solve this problem, a novel computational method, Light Field Imaging (LFI), has been introduced for terahertz imaging. A conventional transmission-type terahertz imaging system based on a gas-pumped terahertz source and terahertz Focal Plane Array Detectors (FPA) arrays is established to analyze the problem of image distortion. An experimental virtual camera array terahertz

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Luan, Shenshen, Shuguo Xie, Tianheng Wang, Xuchun Hao, Meiling Yang, and Yuanyuan Li. "A Space-Variant Deblur Method for Focal-Plane Microwave Imaging." Applied Sciences 8, no. 11 (2018): 2166. http://dx.doi.org/10.3390/app8112166.

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In the research of passive millimetre wave (PMMW) imaging, the focal plane array (FPA) can realize fast, wide-range imaging and detection. However, it has suffered from a limited aperture and off-axis aberration. Thus, the result of FPA is usually blurred by space-variant point spread function (SVPSF) and is hard to restore. In this paper, a polar-coordinate point spread function (PCPSF) model is presented to describe the circle symmetric characteristic of space-variant blur, and a log-polar-coordinate transformation (LPCT) method is propagated as the pre-processing step before the Lucy–Richar

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8

Cintron, Michael Santiago, Terri Von Hoven, Krystal Fontenot, Rebecca Hron, and Doug J. Hinchliffe. "Examintaion of Fabric Chemical Treatment Uniformity using a Mid-IR Focal Plane Array Detector." AATCC Journal of Research 6, no. 3 (2019): 1–7. http://dx.doi.org/10.14504/ajr.6.3.1.

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A macro sampling chamber equipped with mid-infrared (IR) focal plane array (FPA) detector was used to examine chemical treatments of cotton fabrics. Conventional IR methods typically examine individual points in a sample, while the FPA detector provides spatially resolved spectra that can corroborate chemical treatment and its distribution on the cotton fabric. Characterizations of three distinct treatments are presented: non-durable treatments of N, N-diethyl-3-methylbenzamide (DEET), an active ingredient in commercially available insect repellents, a phosphazine-based fire retardant, and fab

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9

Kim, Hyeon-June, Eun-Gyu Lee, and Choul-Young Kim. "A High-Multi Target Resolution Focal Plane Array-Based Laser Detection and Ranging Sensor." Sensors 19, no. 5 (2019): 1210. http://dx.doi.org/10.3390/s19051210.

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This paper introduces a digital-assisted multiple echo detection scheme, which utilizes the waste time of the full serial data readout period in a focal plane array (FPA)-based laser detection and ranging (LADAR) receiver. With the support of an external digital signal processor (DSP) and additional analog memory inserted into the receiver, the proposed readout scheme can effectively enhance multi-target resolution (MTR) three times higher than the conventional FPA-based LADAR, while maintaining low power consumption and a small area. A prototype chip was fabricated in a 0.18-μm CMOS process w

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10

Yan, A. Qi, Deng Shan Wu, Hao Wang, et al. "Design of Compact Infrared Zoom Lens System." Advanced Materials Research 571 (September 2012): 324–27. http://dx.doi.org/10.4028/www.scientific.net/amr.571.324.

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Infrared zoom lens system with cooled focal plane array (FPA) detector is widely used in military application. Relevant information about optical design can be got easily, but research on infrared zoom lens system with low cost and high image quality for commercial application is less. This paper design a Compact infrared zoom lens system with only four lenses, using an uncooled focal plane array (FPA) with 384×288 pixels with zoom ratio 3:1. Because of large F number and less lenses, transmission of the whole zoom system is greatly improved. NETD and MRTD of infrared system will be satisfying

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Korolyov S. A., Goryunov A. V., and Parshin V. V. "Array radio imaging based on heterodyne detection with application of the continuous-wave radar technique." Technical Physics Letters 48, no. 1 (2022): 37. http://dx.doi.org/10.21883/tpl.2022.01.52466.18992.

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A new approach to the creation of millimeter-wave radio imaging systems is proposed. This approach is based on the use of an array receiver consisting of a densely packed (pixel size of 4 mm) array of planar mixers located in the focal plane of a quasi-optical objective, with application of the frequency-modulated continuous-wave radar technique. It has been demonstrated that the implementation of the heterodyne type of reception makes it possible to increase the distance range of the array radio imaging system up to ~ 100 m while maintaining the angular resolution at the previous level. Keywo

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GUNAPALA, S. D., and S. V. BANDARA. "GaAs/AlGaAs MULTI-QUANTUM WELL-BASED INFRARED FOCAL PLANE ARRAYS FOR INFRARED IMAGING APPLICATIONS." International Journal of High Speed Electronics and Systems 12, no. 03 (2002): 691–713. http://dx.doi.org/10.1142/s0129156402001678.

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New infrared focal plane arrays (FPAs) with multi-spectral coverage, high sensitivity, and lower manufacturing costs are required for many ground-based and space-based infrared imaging applications, One of the most promising FPA technologies is a GaAs/AlGaAs based Quantum Well Infrared Photodetector (QWIP) FPAs. In this paper we discuss the importance of focal plane array non-uniformity on the performance, demonstrations of varies infrared imaging cameras based on narrow-band QWIP FPAs, demonstration of long-wavelength/very long-wavelength dual-band QWIP imaging camera, demonstration of the fi

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13

Korolyov, Sergey, Aleksandr Goryunov, Ivan Illarionov, Vladimir Parshin, and Petr Zemlyanukha. "Millimeter-Wave Imaging System Based on Direct-Conversion Focal-Plane Array Receiver." Sensors 22, no. 19 (2022): 7132. http://dx.doi.org/10.3390/s22197132.

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A new approach to millimeter-wave imaging was suggested and experimentally studied. This approach can be considered as the evolution of the well-established focal-plane array (FPA) millimeter-wave imaging. The significant difference is the use of a direct-conversion array receiver, instead of the direct-detection array receiver, along with the frequency-modulated continuous-wave (FMCW) radar technique. The sensitivity of the direct-conversion receiver is several orders higher than the sensitivity of the direct-detection one, which allows us to increase the maximum imaging range by more than on

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Wu, Zimu, and Xia Wang. "DMD Mask Construction to Suppress Blocky Structural Artifacts for Medium Wave Infrared Focal Plane Array-Based Compressive Imaging." Sensors 20, no. 3 (2020): 900. http://dx.doi.org/10.3390/s20030900.

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With medium wave infrared (MWIR) focal plane array-based (FPA) compressive imaging (CI), high-resolution images can be obtained with a low-resolution MWIR sensor. However, restricted by the size of digital micro-mirror devices (DMD), aperture interference is inevitable. According to the system model of FPA CI, aperture interference aggravates the blocky structural artifacts (BSA) in the reconstructed images, which reduces the image quality. In this paper, we propose a novel DMD mask design strategy, which can effectively suppress BSA and maximize the reconstruction efficiency. Compared with ra

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15

Cintron, Michael Santiago, Terri Von Hoven, Doug J. Hinchliffe, and Rebecca Hron. "Examination of Cotton Maturity and Maturity Distribution Using an Infrared Focal Plane Array Imaging System." AATCC Journal of Research 8, no. 1 (2021): 14–24. http://dx.doi.org/10.14504/ajr.8.1.3.

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Cotton maturity describes the thickness of the cotton secondary cell wall. There is a need for developing non-destructive methods for measuring maturity that also examine distribution. The current study seeks to expand reported infrared (IR)-based maturity determinations using an IR imaging system with a focal-plane array (FPA) detector. Adapted equations were used to examine the maturity of cotton standards and of a larger set of upland cotton varieties (30 total). Maturity values obtained with a Cottonscope and from IR determinations showed strong linearity, R2 = 0.95, while contour plots pr

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16

Treado, Patrick J., Ira W. Levin, and E. Neil Lewis. "Indium Antimonide (InSb) Focal Plane Array (FPA) Detection for Near-Infrared Imaging Microscopy." Applied Spectroscopy 48, no. 5 (1994): 607–15. http://dx.doi.org/10.1366/0003702944924899.

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Near-infrared spectroscopy is a sensitive, noninvasive method for chemical analyses, and its integration with imaging technologies represents a potent tool for the study of a wide range of materials. In this communication the use of an indium antimonide (InSb) multichannel imaging detector for near-infrared absorption spectroscopic microscopy is described. In particular, a 128 × 128 pixel InSb staring array camera has been combined with a refractive optical microscope and an acousto-optic tunable filter (AOTF) to display chemically discriminative, spatially resolved, vibrational spectroscopic

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Boltar, Konstantin, Igor Burlakov, Natalya Iakovleva, et al. "SWIR Photosensory." ADVANCES IN APPLIED PHYSICS 9, no. 6 (2021): 479–98. http://dx.doi.org/10.51368/2307-4469-2021-9-6-479-498.

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In this paper, we report on the design, the fabrication, and performance of SWIR photomodules using sensitive two-dimensional arrays based on InGaAs-heterostructures. The de- sign of suggested InGaAs-heterostructure includes InAlAs wideband barrier layer and high sensitive absorber InGaAs layer which are increasing the uniformity and operability of focal plane array (FPA), so the number of defect elements are less than 0.5 %. The possibilities of spectral range expanding into short-wavelength to 0.5 μm and into long-wavelength to 2.2 μm regions have been considered. The operation princip

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Xu, Bin, Yong Gang Yuan, Ding Ma, Neng Bin Cai, and Xiang Yang Li. "Readout Integrated Circuits with Pixel-Level ADC for Ultraviolet FPA Applications." Applied Mechanics and Materials 229-231 (November 2012): 1499–502. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.1499.

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An array of 128×128 digital pixel sensors (DPS) that performs both in pixel light current integration and analog-to-digital conversion is presented. The pixel fabricated on a DP4M CMOS process provides a digital output of ultraviolet light intensity via an integrated multiple-channel bit-serial (MCBS) ADC. Due to low light current (~pA) of ultraviolet focal-plane-array, the architecture of capacitive trans-impedance amplifier (CTIA) is used. The proposed readout integrated circuits have a 12-bit resolution, 70dB dynamic range and 99% of linearity.

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Dos Santos, Augusto Cezar Gomes, Gustavo Soares Vieira, and Ruy Morgado De Castro. "Non-uniformity correction in a Long Wave Infrared Focal Plane Array as a calibration temperature function." Journal of Integrated Circuits and Systems 14, no. 3 (2019): 1–6. http://dx.doi.org/10.29292/jics.v14i3.64.

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Despite of the manufactory process, all detector or pixel in a Focal Plane Array (FPA) has a different responsivity and offset when evaluated. These variations result in a specific kind of noise, called Fixed Pattern Noise (FPN) or spatial noise. During the image processing, those pixels who has a large deviation in responsivity or in their noise are considered bad pixels, and have their influence removed during the exhibition of a scene. Knowing the answer of all those pixels are the first test procedure in an FPA characterization. However, during the Non-uniformity correction and bad pixel r

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Stuchinsky, Victor, and Alekcey Vishnyakov. "Fine structure of spatial diode photoresponse profiles measured while scanning a narrow strip-shaped illumination spot with FPA diode." Applied Physics, no. 3 (July 28, 2021): 47–53. http://dx.doi.org/10.51368/1996-0948-2021-3-47-53.

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The three-dimensional Monte Carlo simulation of charge-carrier diffusion in a mercury-cadmium-tellurium based focal plane array (FPA) was used to calculate the spatial diode photoresponse profiles measured while scanning a narrow strip-shaped illumination spot with a selected FPA diode in the limit of largest and lowest diode photocurrents. The simulation was performed for a standard 2D n-on-p FPA with square photodiodes. Fine features in measured spot-scan profiles due to the presence of FPA structure were identified, and the de-pendence of these features on the boundary conditions for diffus

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Van Den Broek, W. H. A. M., D. Wienke, W. J. Melssen, et al. "Application of a Spectroscopic Infrared Focal Plane Array Sensor for On-Line Identification of Plastic Waste." Applied Spectroscopy 51, no. 6 (1997): 856–65. http://dx.doi.org/10.1366/0003702971941142.

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A spectroscopic near-infrared imaging system, using a focal plane array (FPA) detector, is presented for remote and on-line measurements on a macroscopic scale. On-line spectroscopic imaging requires high-speed sensors and short image processing steps. Therefore, the use of a focal plane array detector in combination with fast chemometric software is investigated. As these new spectroscopic imaging systems generate so much data, multivariate statistical techniques are needed to extract the important information from the multidimensional spectroscopic images. These techniques include principal

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Gou, Jun, Jun Wang, Xing Zheng, Deen Gu, He Yu, and Yadong Jiang. "Detection of terahertz radiation from 2.52 THz CO2 laser using a 320 × 240 vanadium oxide microbolometer focal plane array." RSC Advances 5, no. 102 (2015): 84252–56. http://dx.doi.org/10.1039/c5ra15049c.

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Crocombe, R. A., N. Wright, D. L. Drapcho, W. J. McCarthy, P. Bhandare, and E. J. Jiang. "FT-IR Spectroscopic Imaging in the Infrared “Fingerprint”Region Using an Mct Array Detector." Microscopy and Microanalysis 3, S2 (1997): 863–64. http://dx.doi.org/10.1017/s143192760001120x.

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A new infrared spectroscopic imaging technique has been described, combining step-scan Fourier transform (FT) Michelson interferometry with indium antimonide (InSb) focal-plane array (FPA) image detection [1-3], for use in the range 3950-1975 cm−1. The coupling of such detector to an interferometer provides an optimized method for infrared spectroscopic imaging by simultaneously realizing both a multiplex and multichannel advantage. Specifically, the multiple detector elements enable spectra at all pixels to be collected simultaneously, while the interferometer allows all the spectral frequenc

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Ting, David Z., Sir B. Rafol, Arezou Khoshakhlagh, et al. "InAs/InAsSb Type-II Strained-Layer Superlattice Infrared Photodetectors." Micromachines 11, no. 11 (2020): 958. http://dx.doi.org/10.3390/mi11110958.

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The InAs/InAsSb (Gallium-free) type-II strained-layer superlattice (T2SLS) has emerged in the last decade as a viable infrared detector material with a continuously adjustable band gap capable of accommodating detector cutoff wavelengths ranging from 4 to 15 µm and beyond. When coupled with the unipolar barrier infrared detector architecture, the InAs/InAsSb T2SLS mid-wavelength infrared (MWIR) focal plane array (FPA) has demonstrated a significantly higher operating temperature than InSb FPA, a major incumbent technology. In this brief review paper, we describe the emergence of the InAs/InAsS

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KIRKWOOD, JONAH, ANDREW GHETLER, JACQUELINE SEDMAN, et al. "Differentiation of Group I and Group II Strains of Clostridium botulinum by Focal Plane Array Fourier Transform Infrared Spectroscopy." Journal of Food Protection 69, no. 10 (2006): 2377–83. http://dx.doi.org/10.4315/0362-028x-69.10.2377.

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A method was developed for whole-organism fingerprinting of Clostridium botulinum isolates by focal plane array Fourier transform infrared (FPA-FTIR) spectroscopy. A database of 150,000 infrared spectra of 44 strains of C. botulinum was acquired using a FPA-FTIR imaging spectrometer equipped with a 16 × 16 array detector to evaluate the ability of FTIR spectroscopy to differentiate the 44 strains. The database contained strains from C. botulinum groups I and II producing botulinum neurotoxin of serotypes A, B, E, and F. All strains were grown on each of three agar media (brain heart infusion,

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Kolomiets, O., U. Hoffmann, P. Geladi, and H. W. Siesler. "Quantitative Determination of Pharmaceutical Drug Formulations by Near-Infrared Spectroscopic Imaging." Applied Spectroscopy 62, no. 11 (2008): 1200–1208. http://dx.doi.org/10.1366/000370208786401590.

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Over the last decade Fourier transform infrared (FT-IR) and near-infrared (NIR) spectroscopic imaging with focal plane array (FPA) detectors have proved powerful techniques for the rapid visualization of samples by a combination of spectroscopic and spatial information. Using these methods, selected sample areas can be analyzed with reference to the identification and localization of chemical species by FT-IR spectroscopy in the transmission or attenuated total reflection (ATR) mode and by NIR spectroscopy in diffuse reflection with a lateral resolution in the micrometer range. The present com

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Primpke, S., C. Lorenz, R. Rascher-Friesenhausen, and G. Gerdts. "An automated approach for microplastics analysis using focal plane array (FPA) FTIR microscopy and image analysis." Analytical Methods 9, no. 9 (2017): 1499–511. http://dx.doi.org/10.1039/c6ay02476a.

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We present an automated approach to reduce the time demand currently needed for data analyses. We have developed a novel analysis pipeline, followed by image analysis with Python and Simple ITK image processing modules.

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Huffman, Scott W., Rohit Bhargava, and Ira W. Levin. "Generalized Implementation of Rapid-Scan Fourier Transform Infrared Spectroscopic Imaging." Applied Spectroscopy 56, no. 8 (2002): 965–69. http://dx.doi.org/10.1366/000370202760249684.

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We describe a novel, generalized data acquisition sequence to allow rapid-scan Fourier transform infrared (FT-IR) spectroscopic imaging using focal plane array (FPA) detectors. This technique derives its applicability from the reproducible performance of modern FT-IR instrumentation and the availability of FPAs with simultaneous, full array acquisition, or snapshot electronics. Instead of sampling the entire interferogram in one mirror sweep over a predetermined retardation, as in traditional continuous-scanning techniques, the modulated light from the interferometer is recorded over several m

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Zhong, Li, Xiaoyan Li, Min Zhu, Zhuoyue Hu, and Fansheng Chen. "Improved Intra-Pixel Sensitivity Characterization Based on Diffusion and Coupling Model for Infrared Focal Plane Array Photodetector." Sensors 21, no. 24 (2021): 8195. http://dx.doi.org/10.3390/s21248195.

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The high-precision characterization of the intra-pixel sensitivity (IPS) for infrared focal plane array (FPA) photodetector is of great significance to high-precision photometry and astrometry in astronomy, as well as target tracking in under-sampled remote sensing images. The discrete sub-pixel response (DSPR) model and fill factor model have been used for IPS characterization in some studies. However, these models are incomplete and lack the description of physical process of charge diffusion and capacitance coupling, leading to the inaccuracy of IPS characterization. In this paper, we propo

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Yang, Clayton S. C., Feng Jin, Sudhir Trivedi, Uwe Hommerich, and Alan C. Samuels. "Comparative Long-Wave Infrared Laser-Induced Breakdown Spectroscopy Employing 1-D and 2-D Focal Plane Array Detectors." Sensors 23, no. 3 (2023): 1366. http://dx.doi.org/10.3390/s23031366.

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Long-wave infrared (LWIR) emissions of laser-induced plasma on solid potassium chloride and acetaminophen tablet surfaces were studied using both a one-dimensional (1-D) linear array detection system and, for the first time, a two-dimensional (2-D) focal plane array (FPA) detection system. Both atomic and molecular infrared emitters in the vicinity of the plasma were identified by analyzing the detected spectral signatures in the infrared region. Time- and space-resolved long-wave infrared emissions were also studied to assess the temporal and spatial behaviors of atomic and molecular emitters

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Diaz, Nelson Eduardo, Hoover Fabian Rueda Chacon, and Henry Arguello Fuentes. "High-dynamic range compressive spectral imaging by grayscale coded aperture adaptive filtering." Ingeniería e Investigación 35, no. 3 (2015): 53–60. http://dx.doi.org/10.15446/ing.investig.v35n3.49868.

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<p class="p1">The coded aperture snapshot spectral imaging system (CASSI) is an imaging architecture which senses the three dimensional informa-tion of a scene with two dimensional (2D) focal plane array (FPA) coded projection measurements. A reconstruction algorithm takes advantage of the compressive measurements sparsity to recover the underlying 3D data cube. Traditionally, CASSI uses block-un-block coded apertures (BCA) to spatially modulate the light. In CASSI the quality of the reconstructed images depends on the design of these coded apertures and the FPA dynamic range. This work

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Gioacchini, G., O. Carnevali, E. Giorgini, L. Vaccari, V. Bianchi, and A. Borini. "Evaluation of human oocytes ageing by focal plane array (FPA) fourier transform infrared (FT-IR) imaging spectroscopy." Fertility and Sterility 96, no. 3 (2011): S238—S239. http://dx.doi.org/10.1016/j.fertnstert.2011.07.915.

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Zhao, Lei, Zhao Hui Luan, Yan Ling Xiong, and Li Juan He. "Athermalization Design of Wide Field Medium Wave Infrared Optical System." Advanced Materials Research 981 (July 2014): 295–98. http://dx.doi.org/10.4028/www.scientific.net/amr.981.295.

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Based on the principle of passive optical athermalization, a wide field medium wave infrared optical system is designed for working at -40℃-60℃. A 320×240 focal plane array (FPA) detector as image plane is used in the system. The system has a field-of-view of 30°×22.72° and a relative aperture of f/2 at 3-5 µm with 100% cold shield efficiency. The modulation transfer function (MTF) of each field is greater than 0.6 at the Nyquist frequency and the maximum distortion is less than 3% at -40℃-60℃. The system can meet the demand of the excellent image quality. This work is valuable for athermaliza

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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 (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 ca

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Gunaratne, Thushara K., Len Bruton, and Pan Agathoklis. "Broadband Beamforming of Focal Plane Array (FPA) Signals Using Real-Time Spatio-Temporal 3D FIR Frustum Digital Filters." IEEE Transactions on Antennas and Propagation 59, no. 6 (2011): 2029–40. http://dx.doi.org/10.1109/tap.2011.2122221.

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Anand, Vijayakumar, Soon Hock Ng, Tomas Katkus, et al. "Exploiting spatio-spectral aberrations for rapid synchrotron infrared imaging." Journal of Synchrotron Radiation 28, no. 5 (2021): 1616–19. http://dx.doi.org/10.1107/s1600577521007104.

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The Infrared Microspectroscopy Beamline at the Australian Synchrotron is equipped with a Fourier transform infrared (FTIR) spectrometer, which is coupled with an infrared (IR) microscope and a choice of two detectors: a single-point narrow-band mercury cadmium telluride (MCT) detector and a 64 × 64 multi-pixel focal plane array (FPA) imaging detector. A scanning-based point-by-point mapping method is commonly used with a tightly focused synchrotron IR beam at the sample plane, using an MCT detector and a matching 36× IR reflecting objective and condenser (NA = 0.5), which is time consuming. In

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Zhang, Shuo, Yao Hu, and Qun Hao. "Advances of Sensitive Infrared Detectors with HgTe Colloidal Quantum Dots." Coatings 10, no. 8 (2020): 760. http://dx.doi.org/10.3390/coatings10080760.

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The application of infrared detectors based on epitaxially grown semiconductors such as HgCdTe, InSb and InGaAs is limited by their high cost and difficulty in raising operating temperature. The development of infrared detectors depends on cheaper materials with high carrier mobility, tunable spectral response and compatibility with large-scale semiconductor processes. In recent years, the appearance of mercury telluride colloidal quantum dots (HgTe CQDs) provided a new choice for infrared detection and had attracted wide attention due to their excellent optical properties, solubility processa

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Kong, Yan Mei, Rui Wen Liu, Bin Bin Jiao, et al. "Performance-Enhanced Heat Converter Used in FPA Utilizing a SiOx/Al Corrugated Micro-Cantilever Actuator." Key Engineering Materials 645-646 (May 2015): 951–56. http://dx.doi.org/10.4028/www.scientific.net/kem.645-646.951.

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This paper proposes a performance-enhanced SiOx/Al corrugated micro-cantilever structure, which transfers heat to mechanical deformation. Analytical simulations are carried out using the Finite Element Method (FEM), compared to the traditional straight bi-material structure (TSBMS) with same lengthL, the corrugated bi-material structures (CBMS) have higher temperature response sensitivitySTand lower stiffness factor K. Furthermore, two types of cantilever was fabricated, and the test result verifies the change of the stiffness factorK. Finally, the thermal mechanical uncooled infrared focal pl

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Pinilla, Samuel Eduardo, Héctor Miguel Vargas García, and Henry Arguello Fuentes. "Probability of correct reconstruction in compressive spectral imaging." Ingeniería e Investigación 36, no. 2 (2016): 68. http://dx.doi.org/10.15446/ing.investig.v36n2.56426.

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Coded Aperture Snapshot Spectral Imaging (CASSI) systems capture the 3-dimensional (3D) spatio-spectral information of a scene using a set of 2-dimensional (2D) random coded Focal Plane Array (FPA) measurements. A compressed sensing reconstruction algorithm is then used to recover the underlying spatio-spectral 3D data cube. The quality of the reconstructed spectral images depends exclusively on the CASSI sensing matrix, which is determined by the statistical structure of the coded apertures. The Restricted Isometry Property (RIP) of the CASSI sensing matrix is used to determine the probabilit

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Lewis, EN, LH Kidder, and KS Haber. "Industrial Applications of Near-Infrared Chemical Imaging Microscopy." Microscopy and Microanalysis 7, S2 (2001): 162–63. http://dx.doi.org/10.1017/s143192760002688x.

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Single point near-infrared (NIR) spectroscopy is used extensively for characterizing raw materials and finished products in a wide variety of industries: polymers, paper, film, pharmaceuticals, paintings and coatings, food and beverages, agricultural products. As advanced industrial materials become more complex, their functionality is often determined by the spatial distribution of their discrete sample constituents. However, conventional single point NIR spectroscopy cannot adequately probe the interrelationship between the spatial distribution of sample components with the physical properti

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Reulke, R., I. Sebastian, C. Williges, and R. Hohn. "MTF DETERMINATION OF SENTINEL-4 DETECTOR ARRAYS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-1/W1 (May 31, 2017): 559–65. http://dx.doi.org/10.5194/isprs-archives-xlii-1-w1-559-2017.

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The Institute for Optical Sensor Systems was involved in many international space projects in recent years. These include, for example, the fokal plane array (FPA) of the hyperspectral sensors ENMAP or Sentinel-4, but also the FPA for the high resolution FPA for Kompsat-3. An important requirement of the customer is the measurement of the detector MTF for different wavelengths. A measuring station under clean room conditions and evaluation algorithms was developed for these measurements. The measurement setup consist of a collimator with slit target in focus for illumination at infinity, a gim

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Fan, Dejiu, Byungjun Lee, Caleb Coburn, and Stephen R. Forrest. "From 2D to 3D: Strain- and elongation-free topological transformations of optoelectronic circuits." Proceedings of the National Academy of Sciences 116, no. 10 (2019): 3968–73. http://dx.doi.org/10.1073/pnas.1813001116.

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Optoelectronic circuits in 3D shapes with large deformations can offer additional functionalities inaccessible to conventional planar electronics based on 2D geometries constrained by conventional photolithographic patterning processes. A light-sensing focal plane array (FPA) used in imagers is one example of a system that can benefit from fabrication on curved surfaces. By mimicking the hemispherical shape of the retina in the human eye, a hemispherical FPA provides a low-aberration image with a wide field of view. Due to the inherently high value of such applications, intensive efforts have

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Gunaratne, Thushara K., and Len T. Bruton. "Broadband beamforming of dense aperture array (DAA) and focal plane array (FPA) signals using 3D spatio-temporal filters for applications in aperture synthesis radio astronomy." Multidimensional Systems and Signal Processing 22, no. 1-3 (2010): 213–36. http://dx.doi.org/10.1007/s11045-010-0130-3.

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Chan, K. L. A., S. G. Kazarian, A. Mavraki, and D. R. Williams. "Fourier Transform Infrared Imaging of Human Hair with a High Spatial Resolution without the Use of a Synchrotron." Applied Spectroscopy 59, no. 2 (2005): 149–55. http://dx.doi.org/10.1366/0003702053085070.

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The cross-section of a human hair has been imaged for the first time using the micro attenuated total reflection (ATR) Fourier transformed infrared (FT-IR) method in combination with a focal plane array (FPA) detector. A rigorous approach was applied to determine the spatial resolution, namely, measuring the distance over which the band absorbance changes from 95 to 5% of the maximum absorbance when passing through a sharp interface. The measured value for IR transmission was ∼16 μm, while the value obtained using ATR imaging was ∼5 μm. The enhanced spatial resolution achieved by this method a

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STETTNER, ROGER, HOWARD BAILEY, and STEVEN SILVERMAN. "THREE DIMENSIONAL FLASH LADAR FOCAL PLANES AND TIME DEPENDENT IMAGING." International Journal of High Speed Electronics and Systems 18, no. 02 (2008): 401–6. http://dx.doi.org/10.1142/s0129156408005436.

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3-D flash ladar, herein defined as obtaining an entire frame of 3-D ladar data with one laser pulse, is an emerging technology with a number of advantages over conventional point scanner systems. Probably the most obvious advantage is the higher data rates possible and the potential for much higher data rates with increases in the associated 3-D focal planes array (FPA) format. High data rate means that topographical mapping, for example, can be obtained more rapidly decreasing the amount of flight time required. This paper investigates the clear but perhaps not-so-intuitive use of the high da

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Gioacchini, Giorgia, Oliana Carnevali, Elisabetta Giorgini, Lisa Vaccari, Veronica Bianchi, and Andrea Borini. "Focal Plane Array (FPA) Fourier Transform Infrared (FT-IR) Imaging Spectroscopy as a new technique to evaluate of human oocytes quality." Placenta 32 (September 2011): S281. http://dx.doi.org/10.1016/j.placenta.2011.07.027.

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Story, Gloria M., Curtis Marcott, and Rina K. Dukor. "A Method For Analysis Of Clinical Tissue Samples Using Ft-Ir Microspectroscopic Imaging." Microscopy and Microanalysis 5, S2 (1999): 68–69. http://dx.doi.org/10.1017/s1431927600013660.

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During the past decade, Fourier transform infrared (FT-IR) microspectroscopy has been used successfully in many studies to differentiate normal and diseased tissue samples obtained from a variety of organs, including colon, cervix, prostate, and breast. IR images were constructed by collecting spectra point-by-point using a mapping stage on a FT-IR microscope equipped with a single-element detector. Five years ago, in collaboration with NIH scientists Dr. Neil Lewis and Dr. Ira Levin, Procter and Gamble researchers developed a technique for performing vibrational spectroscopic imaging microsco

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Hu, Zhuoyue, Min Zhu, Qiyao Wang, Xiaofeng Su, and Fansheng Chen. "SDGSAT-1 TIS Prelaunch Radiometric Calibration and Performance." Remote Sensing 14, no. 18 (2022): 4543. http://dx.doi.org/10.3390/rs14184543.

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SDGSAT-1 was launched in November 2021, and TIS (Thermal infrared sensor) is a major instrument onboard this satellite. An analysis of the radiometric calibration and noise performance of the TIS has been carried out in the thermal vacuum chamber before launch in order to ensure that it meets the requirements. The prelaunch test results show NEdT (noise equivalent temperature difference) is 0.034 K, 0.047 K and 0.076 K@300 K for the three bands, respectively. The maximum fitting residuals are less than 0.5 K at measured blackbody temperatures. In addition, this paper also discusses the depende

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Hirschmugl, Carol J., and Kathleen M. Gough. "Fourier Transform Infrared Spectrochemical Imaging: Review of Design and Applications with a Focal Plane Array and Multiple Beam Synchrotron Radiation Source." Applied Spectroscopy 66, no. 5 (2012): 475–91. http://dx.doi.org/10.1366/12-06629.

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The beamline design, microscope specifications, and initial results from the new mid-infrared beamline (IRENI) are reviewed. Synchrotron-based spectrochemical imaging, as recently implemented at the Synchrotron Radiation Center in Stoughton, Wisconsin, demonstrates the new capability to achieve diffraction limited chemical imaging across the entire mid-infrared region, simultaneously, with high signal-to-noise ratio. IRENI extracts a large swath of radiation (320 hor. × 25 vert. mrads 2 ) to homogeneously illuminate a commercial infrared (IR) microscope equipped with an IR focal plane array (F

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Marcott, Curtis, and Robert C. Reeder. "Infrared spectroscopic chemical imaging." Proceedings, annual meeting, Electron Microscopy Society of America 54 (August 11, 1996): 260–61. http://dx.doi.org/10.1017/s0424820100163769.

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Infrared (IR) spectroscopy is a powerful, widely used technique for identifying materials or chemical compounds. An IR spectrum often provides a specific fingerprint for a given molecular component or species. IR frequencies, intensities, and line widths are also extremely sensitive to environmental perturbations and changes in molecular structure. Infrared spectroscopic images recorded through a Fourier transform infrared (FT-IR) microscope attachment have traditionally been constructed by translating a mapping stage a single pixel at a time through the sample area of interest; this is a very

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