Analysis of 320X240 uncooled microbolometer focal plane array ...

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Left: Vertical scale is 200mv/block for the upper curve, 2v/block for the lower curve,and 10s/block time scale.Right: Vertical scale is 100mv/block for the upper curve, 2v/block for the lower curve,and 50s/block time scale.44
45c) Heating of the TEC without heat sink.Left: Vertical scale is 200mv/block for the upper curve, 2v/block for the lower curve,and 10s/block time scale.Right: Vertical scale is 200mv/block for the upper curve, 1v/block for the lower curve,and 100s/block time scale.Figure 4.7 Step response of the TEC pump due to heating and cooling, wherethe vertical scale represents the output of the diodes and the horizontal scalerepresents time.As seen on the 100s/block time scale curve, the absence of the heat sink resulted intemperature increase inside the UFPA packaging (diode voltage drops) due to heat buildup inside the packaging. In 4.7 b), the presence of the heat sink stabilized thetemperature. In Figure 4.7 c), the effect of heating can be observed.As observed from the step response curves, the TEC pump has a time constant ofabout 20 seconds. An equivalent electrical circuit model was derived from the curves(Figure 4.8). The model is in the simplest form, and there are other more complexmodels. As shown in Figure 4.9, the model has a time constant of 20 seconds. The value
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Copyright Warning & RestrictionsThe
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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 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
Page 51 and 52: Unlike the photon sensors, the micr
Page 53 and 54: 414.2 The Controller DesignThe cont
Page 55: 43performed at Inframetrics to dete
Page 59 and 60: 47[(RiR2C1)s + — (R1 + R2) 4.1( )
Page 61 and 62: 49The third amplifier stage has the
Page 63 and 64: t 1
Page 65 and 66: 53c) T showing the response time of
Page 67: REFERENCES1. R. A. Wood, "Uncooled
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Analysis of 320X240 uncooled microbolometer focal plane array ...

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