Analysis of 320X240 uncooled microbolometer focal plane array ...
Analysis of 320X240 uncooled microbolometer focal plane array ... Analysis of 320X240 uncooled microbolometer focal plane array ...
CHAPTER 1INTRODUCTIONIn recent years, the interest toward uncooled infrared imaging has grown significantly dueto its low cost and its ability to operate without cryogenic cooling devices.Microbolometer is one of the successful method used in uncooled imaging projects.In this thesis, the theory as well as the operation of the microbolometer camerasystem developed by the Uncooled, Low cost, Technology Reinvestment Alliance projectis investigated. The camera system includes focal plane array, processing hardware andsoftware, and each part of the camera is analyzed and described.The research work also involved designing of the thermoelectric cooler controllerwhich regulates the temperature of the microbolomter at a constant temperature. Thetemperature stability is an important factor in the focal plane array performance.This thesis is divided into two parts. The first part describes the theory and theoperation of the microbolometer camera system (chapter two and chapter three). Thesecond part is the design of thermoelectric cooler controller (chapter four). Chapter onedescribes the introduction and background of the microbolometer camera. Chapter twodescribes the theory and operation of the microbolometer focal plane array. Chapterthree discusses about the camera hardware and software. Chapter four describes thecontroller for the thermoelectric cooler and chapter five is the conclusion.1
- Page 1 and 2: Copyright Warning & RestrictionsThe
- Page 3 and 4: ABSTRACTANALYSIS OF 320X240 UNCOOLE
- Page 6 and 7: APPROVAL PAGEANALYSIS OF 320X240 UN
- Page 8 and 9: This thesis is dedicated tomy famil
- Page 10 and 11: TABLE OF CONTENTSChapterPage1 INTRO
- Page 14: 21.1 BackgroundFor the past several
- Page 18 and 19: CHAPETER 2UNCOOLED MICROBOLOMETER F
- Page 20 and 21: 8where the proportionality constant
- Page 22 and 23: 10There are three types of material
- Page 24 and 25: 12dAT d(i2R )C + KAT — dTB AT + P
- Page 26 and 27: 14PBIAS VBIAS 2/RDETFigure 2.3 Micr
- Page 28 and 29: 162.5 3Figure 2.4 UFPA responsivity
- Page 30 and 31: 18Noise equivalent temperature diff
- Page 32 and 33: ) Temperature and background fluctu
- Page 34 and 35: 22conditioning electronics, timing
- Page 36 and 37: 24Figure 2.10 shows a typical therm
- Page 38 and 39: 26vacuum to reduce the heat leakage
- Page 40 and 41: 28Figure 2.14 Simplified fabricatio
- Page 42 and 43: 30control, it is possible for the c
- Page 44 and 45: CHAPTER 3CAMERA HARDWARE3.1 DesignF
- Page 46 and 47: 34The module includes colorized out
- Page 48 and 49: CHAPTER 4THERMOELECTRIC COOLER CONT
- Page 50 and 51: Figure 4.2 A single thermoelectric
- Page 52 and 53: 40case of microbolometer array, it
- Page 54 and 55: 42switching circuit is a MOS step-d
- Page 56 and 57: Left: Vertical scale is 200mv/block
- Page 58 and 59: 46of the resistors and the capacito
- Page 60 and 61: 48The controller configuration was
CHAPTER 1INTRODUCTIONIn recent years, the interest toward <strong>uncooled</strong> infrared imaging has grown significantly dueto its low cost and its ability to operate without cryogenic cooling devices.Microbolometer is one <strong>of</strong> the successful method used in <strong>uncooled</strong> imaging projects.In this thesis, the theory as well as the operation <strong>of</strong> the <strong>microbolometer</strong> camerasystem developed by the Uncooled, Low cost, Technology Reinvestment Alliance projectis investigated. The camera system includes <strong>focal</strong> <strong>plane</strong> <strong>array</strong>, processing hardware ands<strong>of</strong>tware, and each part <strong>of</strong> the camera is analyzed and described.The research work also involved designing <strong>of</strong> the thermoelectric cooler controllerwhich regulates the temperature <strong>of</strong> the microbolomter at a constant temperature. Thetemperature stability is an important factor in the <strong>focal</strong> <strong>plane</strong> <strong>array</strong> performance.This thesis is divided into two parts. The first part describes the theory and theoperation <strong>of</strong> the <strong>microbolometer</strong> camera system (chapter two and chapter three). Thesecond part is the design <strong>of</strong> thermoelectric cooler controller (chapter four). Chapter onedescribes the introduction and background <strong>of</strong> the <strong>microbolometer</strong> camera. Chapter twodescribes the theory and operation <strong>of</strong> the <strong>microbolometer</strong> <strong>focal</strong> <strong>plane</strong> <strong>array</strong>. Chapterthree discusses about the camera hardware and s<strong>of</strong>tware. Chapter four describes thecontroller for the thermoelectric cooler and chapter five is the conclusion.1