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检索条件"任意字段=Conference on Electro-Optical and Infrared Systems - Technology and Applications XX"

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High-Resolution Uncooled infrared Sensors: Innovations In 3d Mems technology For Military Use 38

High-Resolution Uncooled Infrared Sensors: Innovations In 3d...

引用

38th IEEE International conference on Micro electro Mechanical systems, MEMS 2025

作者： Chung, Han Kwon, Myungho Kang, Sang-Gu i3system Inc. Korea Republic of

ISBN: (纸本)9798331508890

Over the past few decades, uncooled infrared sensors have evolved by detecting changes in electrical properties resulting from temperature variations when absorbing infrared radiation. The integration of 3D MEMS technology has enabled high performance, miniaturization, and low power consumption, facilitating both commercial and military applications. This paper reports on the development of uncooled infrared sensors capable of detecting LWIR wavelengths using microbolometer-type 2D array technology. Initially, 2μm node 3D MEMS technology was applied to implement a 320x240 array with a 50μm pitch. Recently, to meet the military's ongoing demand for higher resolution and the commercial demand for lower prices, 0.18μm 3D MEMS technology has been used to implement a microbolometer array with an 8μm pitch, achieving a resolution greater than 1280x1024. The advancements in these technologies have significantly improved format, optical performance, environmental durability, and reliability. However, challenges such as increased production costs due to reduced pixel pitch, degradation in environmental resistance and reliability, and optical limitations must still be addressed in the development of uncooled infrared sensors. © 2025 IEEE.

关键词： infrared detectors

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High-Resolution Uncooled infrared Sensors: Innovations In 3d Mems technology For Military Use

High-Resolution Uncooled Infrared Sensors: Innovations In 3d...

引用

IEEE International conference on Micro electro Mechanical systems

作者： Han Chung Myungho Kwon Sang-Gu Kang i3system Inc. Rep. of Korea

ISBN: (数字)9798331508890

ISBN: (纸本)9798331508906

关键词： Micromechanical devices Temperature sensors Resistance Technological innovation Three-dimensional displays Temperature infrared sensors Reliability optical sensors Sensor arrays

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electro-optical and infrared systems: technology and applications xx

Electro-Optical and Infrared Systems: Technology and Applica...

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electro-optical and infrared systems: technology and applications xx 2023

ISBN: (纸本)9781510667037

The proceedings contain 30 papers. The topics discussed include: design of an imaging system for turbulence mitigation using phase diversity;the practicalities of a spatial coherence filter in free-space LIDAR environments;development of a long wave infrared photonic doppler velocimeter;design of a single optical bench for complete performance characterization of night vision device;simulation of a tomographic single-pixel imager using rosette scanning;thermal imagers with boost: range prediction with the Johnson criteria;impact of motion blur on recognition rates of CNN-based TOD classifier models;error analysis of a multi-sensor maritime targeting system;and data gathering trials for the development of military imaging systems.

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Modular turn-key system for testing the spectral response of detectors and cameras in the VIS/NIR and MID/FAR IR 20

Modular turn-key system for testing the spectral response of...

引用

conference on electro-optical and infrared systems - technology and applications xx

作者： Cabib, Dario Elkabets, Moshe CI Syst Israel Ltd Ramat Gavriel Ind Pk IL-2310101 Migdal Haemeq Israel

ISBN: (数字)9781510667044

ISBN: (纸本)9781510667037

CI has developed a modular optical system, which provides the sensor stimulus to obtain the required quantitative spectral response of single detectors, detector array engines and camera systems with small to large aperture optics. The system includes interchangeable sources, Circular Variable Filter scanning monochromator (CVF) and collimating and focusing optics to project monochromatic radiation (in focused or collimated configuration, according to need) towards the sensor. When spatial patterns are also used on the focal plane, the Unit Under Test (UUT) is fully characterized in both spectral and spatial domains.

关键词： Spectral response Cameras Imaging systems Mirrors optical filters Detector arrays Collimators infrared radiation Spatial resolution

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High-performance silicon-based nano-thermoelectric bolometers for uncooled infrared sensing 20

High-performance silicon-based nano-thermoelectric bolometer...

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conference on electro-optical and infrared systems - technology and applications xx

作者： Varpula, Aapo Murros, Anton Sovanto, Kuura Rantala, Arto Martins, David Gomes Tappura, Kirsi Tiira, Jonna Prunnila, Mika VTT Tech Res Ctr Finland Ltd Tietotie 3 FI-02150 Espoo Finland

ISBN: (数字)9781510667044

ISBN: (纸本)9781510667037

infrared (IR) sensors and photodetector arrays are employed in various imaging applications (such as night vision), remote temperature measurement, and chemical analysis. These applications are in space and environmental sensing, transport, health and medicine, safety, security, defense, industry, agriculture, etc. optical chemical analysis employs IR absorption spectroscopy which enables the identification and quantification of gases, liquids, and materials based on their unique absorption spectra which are feature-rich in the IR region. State-of-the-art (SoA) quantum photodetectors utilize either photoconductivity or the photovoltaic effect. Commercial quantum photodetectors are widely available in the spectral range from UV to short-wave infrared (SWIR), but in mid-wave IR (MWIR) and long-wave IR (LWIR), they require exotic materials and cooling to maintain high sensitivity. Thermal detectors (bolometers) are a competing technology that can reach high sensitivities in IR without the need for cooling and can be manufactured using widely available semiconductor technologies. SoA bolometers include resistive bolometers, diode- or transistor-based bolometers, and thermoelectric bolometers. By utilizing nanomaterials and integrated design, we have minimized the thermal mass and demonstrated fast and sensitive nano-thermoelectric IR bolometers with high thermoelectric efficiency. We review the application and development of the silicon-based nano-thermoelectric infrared bolometers: modelling, design, fabrication, and electro-optical characteristics. The enabling materials, silicon nanomembranes, are also discussed, and the first devices used to test the potential of these nanomembranes, the electro-thermal devices, are reviewed and new experimental results are presented.

关键词： infrared detector nano-thermoelectrics mid-wavelength infrared long-wavelength infrared thermoelectric bolometer nanomembrane silicon

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Uncooled Thermal MWIR Imagers for High-Temperature Imaging applications 20

Uncooled Thermal MWIR Imagers for High-Temperature Imaging A...

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conference on electro-optical and infrared systems - technology and applications xx

作者： Michel, M. Blaeser, S. Litke, A. Zakizade, E. Weyers, S. Weiler, D. Fraunhofer IMS D-47057 Duisburg Germany

ISBN: (数字)9781510667044

ISBN: (纸本)9781510667037

Microbolometers are well-established sensing elements for uncooled thermal imaging applications. Benefits in both costs and power consumption allow microbolometers to be a competitive alternative as compared to cooled infrared detectors in most common infrared imaging scenarios. Until now, microbolometers are designed and optimized for the long wavelength infrared (LWIR) regime ranging from 8 mu m to 14 mu m. However, the mid wavelength infrared (MWIR) regime ranging from 3 mu m to 5 mu m is also of great interest for a wide range of applications that can benefit from the advantages of a technological concept relying on microbolometers. For this reason, Fraunhofer IMS developed an uncooled thermal imager based on microbolometers targeting the wavelength spectrum of the MWIR for high temperature imaging applications. A novel imager technology based on Fraunhofer IMS's microbolometer process for lateral leg bolometers providing QVGA resolution (320 x 240) in case of a pixel pitch of 17 mu m but transferred to the MWIR regime will be presented here. In order to increase the sensitivity in the MWIR, the transmission characteristics of the vacuum package have been adopted to meet the requirements of this wavelength region. The resulting spectral sensitivity of our MWIR imagers was verified by means of an electro-optical test setup making use of a high temperature black body radiator. In addition, the actual design of the microbolometer membrane has been optimized to reduce the overall thermal capacitance, resulting in thermal time constants up to 30 % lower than those of our standard LWIR imager.

关键词： high-temperature imaging uncooled thermal imaging microbolometer LWIR MWIR spectral sensitivity thermal time constant

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Improved MCT eSWIR modules for various demands of imaging applications 20

Improved MCT eSWIR modules for various demands of imaging ap...

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conference on electro-optical and infrared systems - technology and applications xx

作者： Wiegleb, R. Breiter, R. Lutz, H. Sieck, A. AIM Infrarot Module GmbH Theresienstr 2 D-74072 Heilbronn Germany

ISBN: (数字)9781510667044

ISBN: (纸本)9781510667037

The Short Wave infrared (SWIR) market for defense, aerospace and industry applications is rapidly growing. A wide range of applications is available: From night vision to plastic sorting up to hyperspectral imaging. The classical SWIR detectors, which are based on InGaAs technology, have a cut-off wavelength typically around 1.7 mu m. The extended SWIR (eSWIR) technology, with a spectral range up to 2.5 mu m however offers significant advantages over traditional SWIR detectors. These are e.g. full exploitation of the nightglow spectrum, enhanced imaging under low light condition or 'out of band' operation with laser illuminators with a wavelength >2 mu m. In addition, eSWIR technology includes reflective and thermal imaging, which allows detecting thermal target radiation in complete darkness. AIM presents its modules with different array formats and pixel pitches in the eSWIR spectral range from 0.8 mu m up to 2.5 mu m. Additionally we show that the cut-on wavelength can be lowered down to similar to 0.4 mu m to extend the spectrum to the visible range by removing the detector substrate. A low size, weight and power (SWaP) eSWIR 640x512 10 mu m pitch module has been developed and produced by AIM. It is best suited for handheld imaging or hyperspectral imaging applications with e.g. integration in UAVs. Key enabler for low SWaP however is higher operating temperature detector technology. Hence, we present the last improvements on dark current density and electro-optical performance of our eSWIR MCT HOT detector technology.

关键词： MCT extended SWIR eSWIR SWIR hyperspectral imaging SWaP high operating temperature HOT

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Parameterised MRTD 20

Parameterised MRTD

引用

conference on electro-optical and infrared systems - technology and applications xx

作者： Borve, Steinar Norwegian Def Res Estab FFI POB 25 N-2027 Kjeller Norway

ISBN: (数字)9781510667044

ISBN: (纸本)9781510667037

A large number of factors may influence the performance of thermal surveillance systems used in any given scenario. Highly accurate predictions of acquisition range for a sensor therefore requires the access to specialized numerical tools with a large number of input parameters. At the other hand, simple range estimations with acceptable accuracy can be made for situations of ideal conditions by applying the Johnson Criteria. However, such an approach completely ignores the effect of low signal contrast and atmospheric attenuation and would therefore be unsuited for many real-world scenarios. This work proposes an alternative method, of medium accuracy and complexity, for estimating the acquisition range of thermal sensors. It relies on the well-known concept of Minimum Resolvable Temperature Difference (MRTD), and the method represents the MRTD information for a given sensor by a parametric curve. The form of the parametric curve is chosen so that the observation range can be estimated from a simple second-order equation. The new method has several advantages. First, uncertainties in calculated acquisition range can easily be estimated based on input parameter uncertainties. Secondly, linear approximations can be made for classes of scenarios by making specific assumptions about thermal contrast and atmospheric attenuation. Thirdly, the method can form the basis for a more generalised solver that can handle an even wider range of scenarios. In this work, the new method called Parameterised MRTD (PMRTD) is outlined. Linear approximations to the solutions are derived. In addition, the solution for relevant examples are shown and discussed.

关键词： Thermal sensors signature modelling and analysis of IR systems defence and security applications of IR sensor technology

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Adaptive Optimization of infrared Emission from Femtosecond Filaments

Adaptive Optimization of Infrared Emission from Femtosecond ...

引用

conference on electro-optical and infrared systems - technology and applications VIII

作者： Walter, Dominik Buersing, Helge Fraunhofer Inst Optron Syst Technol & Image Explo D-76275 Ettlingen Germany

ISBN: (纸本)9780819488138

We investigated the single shot output characteristics in the infrared region for single filaments in air. The infrared emission could be enhanced up to a few orders of magnitude by use of adaptive optics. Sensor dazzling effects were studied with different optical setups. Furthermore, a large variety of complex single shot emission patterns could be isolated. The detected emission of spiral patterns suggests the possibility of spiral propagation of laser light. To automatically optimize special emission patterns an evolutionary algorithm with noise suppression was designed.

关键词： Femtosecond filament evolutionary algorithm adaptive optics infrared emission sensor dazzling nonlinear optics

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Uncooled irfpa with high-performance and low-thermal time constant

Uncooled irfpa with high-performance and low-thermal time co...

引用

conference on electro-optical and infrared systems

作者： Tissot, JL Vilain, M Crastes, A Tinnes, S Larre, A Legras, O Yon, JJ ULIS F-38113 Veurey Voroize France

ISBN: (纸本)0819455652

Uncooled infrared focal plane arrays are being developed for a wide range of thermal imaging applications. Developments are focused on the improvement of their sensitivity enabling the possibility of reducing the pixel pitch in order to decrease the total system size and weight by using smaller optics. We present the ULIS second generation technology used for producing 320 x 240 / 384 x 288 and 160 x 120 IRFPA with a pixel pitch of 35 mum. This enhanced technology has been developed by CEA / LETI since 2001 and transferred to ULIS in 2003. The device architecture will be described. These device are well adapted to high volume military applications (i.e. thermal weapons sight, enhanced driver vision) or commercial applications (non contact thermometers, thermal imaging cameras...) where system specifications are the result of a trade-off between pixel pitch, performance and system weight and volume. We have developed for these devices low cost packages. lRFPA electro-optical characterization is presented.

关键词： Sensors Readout integrated circuits Manufacturing Amorphous silicon Thermography electro optics infrared imaging infrared radiation Microbolometers Staring arrays

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