Analysis of 320X240 uncooled microbolometer focal plane array ...
Analysis of 320X240 uncooled microbolometer focal plane array ... Analysis of 320X240 uncooled microbolometer focal plane array ...
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ABSTRACTANALYSIS OF 320X240 UNCOOLEDMICROBOLOMETER FOCAL PLANE ARRAYAND DESIGN OFTHERMOELECTRIC COOLER CONTROLLERbyTakayoshi FukayaUncooled microbolometer focal plane array is one of the promising method used inuncooled infrared imaging projects. The array's advantages over the conventional cooledimagers are its ability to operate without cryogenic cooler or dewar and its low cost. Forthe past several years, the ULTRA (Uncooled, Low cost, Technology ReinvestmentAlliance) Consortium has been developing uncooled microbolometer imaging system.This thesis investigates the technology behind the ULTRA camera system. Thetheoretical as well as the operation of the uncooled microbolometer focal plane array andthe processing hardware and software is analyzed and explained.Thermoelectric cooler controller for the microbolometer focal plane array isdesigned and described. The thermoelectric cooler, a solid state heat pump, is used tostabilize the temperature inside the microbolometer array packaging at a constanttemperature to obtain higher microbolometer performance. The controller is designedand simulated to stabilize minimum of 20mK change in temperature inside the packaging.
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- Page 8 and 9: This thesis is dedicated tomy famil
- Page 10 and 11: TABLE OF CONTENTSChapterPage1 INTRO
- Page 13 and 14: CHAPTER 1INTRODUCTIONIn recent year
- Page 17 and 18: 5radiation (LWIR) between 811m to 1
- Page 19 and 20: Figure 2.1 Simplified bolometer str
- Page 21 and 22: 9The first function of the right ha
- Page 23 and 24: 11corresponding to T 1 . With radia
- Page 25 and 26: 13then the transient term goes to z
- Page 27 and 28: 15The signal voltage (Eauation 2.26
- Page 29 and 30: 172.2.3 NoiseThe detection capabili
- Page 31 and 32: 19F is the f/# of the optics, VN is
- Page 33 and 34: 21To obtain the temperature fluctua
- Page 35 and 36: 23provide protection against detect
- Page 37 and 38: ZE1 L4t46LII C. 10 aft( IL.The UFPA
- Page 39 and 40: 27reflection (AR) coated Ge window
- Page 41 and 42: 29170 synchronization standard sign
- Page 43 and 44: 31amplified and integrated detector
- Page 45 and 46: 33processing module by a scan conve
- Page 47 and 48: Figure 3.3 UFPA camera platform.35
- Page 49 and 50: 37high mechanical strength as shown
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ABSTRACTANALYSIS OF <strong>320X240</strong> UNCOOLEDMICROBOLOMETER FOCAL PLANE ARRAYAND DESIGN OFTHERMOELECTRIC COOLER CONTROLLERbyTakayoshi FukayaUncooled <strong>microbolometer</strong> <strong>focal</strong> <strong>plane</strong> <strong>array</strong> is one <strong>of</strong> the promising method used in<strong>uncooled</strong> infrared imaging projects. The <strong>array</strong>'s advantages over the conventional cooledimagers are its ability to operate without cryogenic cooler or dewar and its low cost. Forthe past several years, the ULTRA (Uncooled, Low cost, Technology ReinvestmentAlliance) Consortium has been developing <strong>uncooled</strong> <strong>microbolometer</strong> imaging system.This thesis investigates the technology behind the ULTRA camera system. Thetheoretical as well as the operation <strong>of</strong> the <strong>uncooled</strong> <strong>microbolometer</strong> <strong>focal</strong> <strong>plane</strong> <strong>array</strong> andthe processing hardware and s<strong>of</strong>tware is analyzed and explained.Thermoelectric cooler controller for the <strong>microbolometer</strong> <strong>focal</strong> <strong>plane</strong> <strong>array</strong> isdesigned and described. The thermoelectric cooler, a solid state heat pump, is used tostabilize the temperature inside the <strong>microbolometer</strong> <strong>array</strong> packaging at a constanttemperature to obtain higher <strong>microbolometer</strong> performance. The controller is designedand simulated to stabilize minimum <strong>of</strong> 20mK change in temperature inside the packaging.
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