Progress toward an uncooled IR imager with 5-mK NETD

Amantea, R.; Goodman, L.A.; Pantuso, Francis P.; Sauer, Donald J.; Varghese, Matthew; Villani, Thomas S.; White, L. K.

doi:10.1117/12.328065

Cited by 36 publications

(19 citation statements)

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“…Increased g th in short L Cth region makes large NETD TM . The lower NETD TF of the proposed design is due to its increased absorber area [6]. The simulation results indicate that the proposed structure has improved noise characteristics.…”

Section: Experiments and Resultsmentioning

confidence: 70%

“…Our approach for TM-noise reduction is to increase both k which is proportional to 1/L 3 and A by halving the leg length (L) in the given pixel area. Although the sensitivity [temperature coefficient of capacitance (TCC)] of the device is decreased since Δz/ΔT d is proportional to L 2 [6], the overall TM-noise can be reduced. The top view of a conventional cantilever-type IR detector is shown in Fig.1(a) [2].…”

Section: Experiments and Resultsmentioning

confidence: 99%

“…O WING TO THEIR high-sensitivity and low-noise characteristics [1]- [5], microcantilever-type infrared (IR) detectors are known to have potentially superior performance than conventional thermal IR sensors [6], [7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Cantilever-Type Uncooled Infrared Detector With High Fill-Factor and Low-Noise Characteristic

Kim¹,

Kwon²,

Hwang³

et al. 2009

IEEE Electron Device Lett.

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A capacitive microcantilever-type infrared (IR) detector having a unique structure that has high immunity to thermomechanical noise (TM-noise) is proposed. The device has a capacitive readout scheme and is compared with a conventional design using the same readout method by finite element model simulation. The total cantilever length was halved, compared with the conventional device structure, in order to increase the device's spring constant, and the IR absorber area was consequently increased as the portion of the leg in the given pixel area is decreased. Large spring constant and increased absorber area are the main causes of the TM-noise reduction. The feasibility of the device was shown by fabrication, and measured parameters demonstrated the structure's superiority. It was shown that the proposed structure potentially has low TM-noise and an overall noise-equivalent temperature difference (NETD) value that is lower than that of the conventional designed device. The NETD of the proposed device was found to be 5.7 mK.Index Terms-Fill factor, microcantilever-type infrared (IR) detector, noise-equivalent temperature difference (NETD), thermomechanical noise (TM-noise).

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Section: Experiments and Resultsmentioning

confidence: 70%

Section: Experiments and Resultsmentioning

confidence: 99%

See 1 more Smart Citation

A Cantilever-Type Uncooled Infrared Detector With High Fill-Factor and Low-Noise Characteristic

Kim¹,

Kwon²,

Hwang³

et al. 2009

IEEE Electron Device Lett.

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“…And along with the scientific and technological progress, the MEMS based Focal Plane Array (FPA) infrared imaging system is drawing increasing attention, which is uncooled, cheap and more reliable than traditional systems [1][2] . According to its readout methods, there are basically two kinds of FPA infrared imaging system: electrical readout system and optical readout system.…”

Section: Introductionmentioning

confidence: 99%

Study of real-time image denoising and hole-filling for micro-cantilever IR FPA imaging system

et al. 2014

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This paper proposes and experimentally demonstrates a new denoising and hole-filling algorithm through discrete points removal and bilinear interpolation based on the bi-material cantilever FPA infrared imaging system. In practice, because of the limitation of FPA manufacturing process and optical readout system, the quality of obtained images is always not satisfying. A lot of noise and holes appear in the images, which restrict the application of the infrared imaging system. After analyzing the causes of noise and holes, an algorithm is presented to improve the quality of infrared images. Firstly, the statistic characteristics such as probability histograms of images with noise are analyzed in great detail. Then, IR images are denoised by the method of discrete points removal. Second, the holes are filled by bilinear interpolation. In this step, the reference points are found through partial derivative method instead of using the edge points of the holes simply. It can detect the real points effectively and enable the holes much closer to the true values. Finally, the algorithm is applied to different infrared images successfully. Experimental results show that the IR images can be denoised effectively and the SNRs are improved substantially. Meanwhile, the filling ratios of target holes reach as high as 95% and the visual quality is achieved well. It proves that the algorithm has the advantages of high speed, great precision and easy implement. It is a highly efficient real-time image processing algorithm for bi-material micro-cantilever FPA infrared imaging system.

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“…Micro-cantileverbased IRFPA is one of the most promising IR sensing methods which have the potential to overcome the limitations of the present un-cooled sensor technology and achieve superior performance. It is very suitable for commercial applications as well as military applications [1][2][3][4][5][6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Design of readout circuit for microcantilever-based ripple uncooled infrared focal plane arrays

Cao

Chen

et al. 2009

SPIE Proceedings

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A readout integrated circuit (ROIC) for uncooled microcantilever infrared focal plane arrays (IRFPAs) based on capacitive readout is proposed. The ROIC is optimized according to noise modeling and analysis to reduce noise. An experimental chip of 16×16 FPAs readout circuit has been designed and fabricated using 0.35um CMOS technology. The measurement results showed that the power dissipation is 16.5mW from a 5V supply voltage at 50Hz frame rate, the linearity is 99.2% at the typical mode; the uniformity is larger than 97% and the equivalent noise charge (ENC) is below 150e. It is believed that the ROIC has a great potential in the applications of large-scale micro-cantilever-based uncooled IRFPAs.

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Progress toward an uncooled IR imager with 5-mK NETD

Cited by 36 publications

References 0 publications

A Cantilever-Type Uncooled Infrared Detector With High Fill-Factor and Low-Noise Characteristic

A Cantilever-Type Uncooled Infrared Detector With High Fill-Factor and Low-Noise Characteristic

Study of real-time image denoising and hole-filling for micro-cantilever IR FPA imaging system

Design of readout circuit for microcantilever-based ripple uncooled infrared focal plane arrays

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