Cooled and uncooled infrared detectors for missile seekers

Fraenkel, Rami; Haski, Jacob; Mizrahi, U.; Shkedy, Lior; Shtrichman, I.; Pinsky, Ephi

doi:10.1117/12.2050099

Cited by 4 publications

(4 citation statements)

References 9 publications

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“…The 10µm technology leverages these technology improvements, and as illustrated on Figure 12, the NUC correction remains far from NETD value for operation at 110K and F/4 aperture after multiple ON-OFF (cooling / warming) sequence using reference "factory" NUC tables. InSb -80K after 24h -réf [ 11] . As illustrated on Figure 13, this remarkable result for MCT components is now equivalent or better to the performances achieved with InSb technology operating at 80K [11].…”

Section: 54mentioning

confidence: 99%

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Update on 10μm pixel pitch MCT-based focal plane array with enhanced functionalities

et al. 2015

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Sofradir was first to show a 10µm focal plane array (FPA) in DSS 2012, and announced the DAPHNIS 10µm product family back in 2014. This pixel pitch is key for enabling more compact sensors and increased resolution. SOFRADIR recently achieved outstanding MTF demonstration at this pixel pitch, which clearly demonstrate the benefit to users of adopting 10µm pixel pitch focal plane array based detectors. The last results, and associated gain in detection performance, are discussed in this paper.Concurrently to pitch downsizing, SOFRADIR also works on a global offer using digital interfaces and smart pixel functionalities. This opens the road to enhanced functionalities such as improved image quality, higher frame rate, lower power consumption and optimum operation for wide thermal conditions scenes. This paper also discusses these enhanced features and strategies allowing easier integration of the detector in the system.

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Section: 54mentioning

confidence: 99%

“…InSb -80K after 24h -réf [ 11] . As illustrated on Figure 13, this remarkable result for MCT components is now equivalent or better to the performances achieved with InSb technology operating at 80K [11]. This outstanding performance has been achieved on a full format matrix.…”

Section: 54mentioning

confidence: 99%

Update on 10μm pixel pitch MCT-based focal plane array with enhanced functionalities

et al. 2015

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“…Rapid target detection, real-time tracking, and accurate target measurement have become a major focus in the development of optical systems. 1 Currently, most of the existing automotive systems achieve a 360-deg panorama in the horizontal direction by mechanical rotation of a platform. In order to ensure the desired scan rate, dwell time on each pixel is only tens of microseconds, resulting in reduced signal-to-noise ratio (SNR) which causes delays between detection and target judgment.…”

Section: Introductionmentioning

confidence: 99%

Optical system design of four-channel dual-band infrared panoramic imaging

2019

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In order to reduce the volume of a panoramic optical system, a four-channel infrared dual-band panoramic imager was designed using spatial multicamera image mosaicking. Each optical system of the imaging channel was designed in a double imaging configuration with an F-number of 2, working bands of MWIR 3 to 5 μm and LWIR 8 to 12 μm, and a full field of view (FOV) of 122 deg. By adopting refractive-diffractive hybrid optical elements and introducing aspheric designs, the system was made to achieve temperature compensation from −40°C to 60°C by means of optical passive athermalization. Results indicate that the system attained almost 100% cold stop efficiency. At the Nyquist frequency of 18 lp/mm, the modulation-transfer-function (MTF) of the MWIR system was higher than 0.70 at the edges of the FOV, whereas the MTF of LWIR system was greater than 0.35 for the same condition, both approaching the diffraction limit.

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“…In recent decades, most researchers have studied the uncooled infrared thermal imager [5,6] . Owing to its high performance, contact-free testing, nondestructive examination, wide measurement range, low power consumption, high resolution, quick response, and low-cost [7] , it has been widely used in military [8,9] and civil applications [10] , including electrical engineering [11] , medicine [12,13] , construction [14] , manufacturing [15] , and road traffic flow monitoring [16] . The uncooled infrared thermal imager has progressed to a point where its sensitivity and resolution are sufficient for it to replace the cooled infrared thermal imager in civil applications.…”

Section: Introductionmentioning

confidence: 99%

An empirical method for improving accuracy of human eye temperature measured by uncooled infrared thermal imager

et al. 2018

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In order to reduce the temperature measurement error with the uncooled infrared thermal imager, experiments were conducted to evaluate the effects of environment temperature and measurement distance on the measurement error of human eye temperature. First, the forehead temperature was used as an intermediate variable to obtain the actual temperature of human eyes. Then, the effects of environment temperature and measurement distance on the temperature measurement were separately analyzed. Finally, an empirical model was established to correlate actual eye temperature with the measured temperature, environment temperature, and measurement distance. To verify the formula, three different environment temperatures were tested at different distances. The measurement errors were substantially reduced using the empirical model for temperature correction. The results show that this method can effectively improve the accuracy of temperature measurement using the infrared thermal imager.

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Cooled and uncooled infrared detectors for missile seekers

Cited by 4 publications

References 9 publications

Update on 10μm pixel pitch MCT-based focal plane array with enhanced functionalities

Update on 10μm pixel pitch MCT-based focal plane array with enhanced functionalities

Optical system design of four-channel dual-band infrared panoramic imaging

An empirical method for improving accuracy of human eye temperature measured by uncooled infrared thermal imager

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