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Technologies of high-performance thermography systems

机译:高性能热成像系统技术

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Abstract: A family of 2 dimensional detection modules based on 256 by 256 and 486 by 640 platinum silicide (PtSi) focal planes, or 128 by 128 and 256 by 256 mercury cadmium telluride (MCT) focal planes for applications in either the 3 - 5 micrometer (MWIR) or 8 - 10 micrometer (LWIR) range was recently developed by AIM. A wide variety of applications is covered by the specific features unique for these two material systems. The PtSi units provide state of the art correctability with long term stable gain and offset coefficients. The MCT units provide extremely fast frame rates like 400 Hz with snapshot integration times as short as 250 microseconds and with a thermal resolution NETD less than 20 mK for e.g. the 128 by 128 LWIR module. The unique design idea general for all of these modules is the exclusively digital interface, using 14 bit analog to digital conversion to provide state of the art correctability, access to highly dynamic scenes without any loss of information and simplified exchangeability of the units. Device specific features like bias voltages etc. are identified during the final test and stored in a memory on the driving electronics. This concept allows an easy exchange of IDCAs of the same type without any need for tuning or e.g. the possibility to upgrade a PtSi based unit to an MCT module by just loading the suitable software. Miniaturized digital signal processor (DSP) based image correction units were developed for testing and operating the units with output data rates of up to 16 Mpixels/s. These boards provide the ability for freely programmable realtime functions like two point correction and various data manipulations in thermography applications. !8
机译:摘要:基于256 x 256和486 x 640的硅化铂(PtSi)焦平面,或128 x 128和256 x 256碲化汞镉(MCT)焦平面的二维检测模块系列,适用于3-5应用微米(MWIR)或8-10微米(LWIR)范围是AIM最近开发的。这两种材料系统独有的特定功能涵盖了广泛的应用。 PtSi单元具有长期稳定的增益和失调系数,可提供最新的可校正性。 MCT单元可提供极高的帧频(例如400 Hz),快照集成时间短至250微秒,并且热分辨率NETD例如小于20 mK。 128 x 128 LWIR模块。所有这些模块的独特设计思路是专有的数字接口,使用14位模数转换以提供最新的可校正性,访问高度动态的场景而不会丢失任何信息,并且简化了单元的可交换性。器件的特定功能(例如偏置电压等)在最终测试期间会被识别,并存储在驱动电子设备的存储器中。该概念允许容易地交换相同类型的IDCA,而无需进行任何调整或调整。只需加载合适的软件,即可将基于PtSi的单元升级为MCT模块。开发了基于微型数字信号处理器(DSP)的图像校正单元,用于以高达16 Mpixels / s的输出数据速率测试和操作这些单元。这些板卡提供了可自由编程的实时功能的能力,例如热成像应用中的两点校正和各种数据处理。 !8

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