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

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34The module includes colorized output in NTSC or PAL, black and white radiometricallycalibrated analog video, and 12 bit digital video output.The ThermaCAMim software is applicable to both cooled and uncooled arrays.The process of the software includes "equalization," a standard method of determiningcorrection coefficients in the computer and downloading coefficients back to the camera,to acquire proper frame data for the process. The software functions include filemanagement, live image display, image capture, histograms, NETD, image pixelstatistics, gain and offset coefficients, calibration curves, image brightness and contrast,colorization, and several other specialized features.Inframetrics developed the imaging test fixture for the Honeywell bipolar array byintegrating the interface board with ThermaCAM Thi electronics. The test fixture allowedpreliminary array and radiometric characterization, while the Rockwell arrays and theassociated imaging board were being developed. Information gained from the array andradiometirc characterization was used to improve the system for the Rockwell array [5].,A new interface board was developed for the microbolometer arrays to compensate forsignal levels and noise characteristics different from that of photon detectors.Figure 3.2 shows the camera test fixture for the Rockwell microbolometer array.It consists of the new interface board and the ThermaCAM TM platform electronics.Figure 3.3 shows the test fixture functional block diagram. The UFPA array is connectedto the interface board with sample and hold, and 16-bit AID converter. The digitizedvideo is sent to the video processor module for signal processing and also to the computerwhere the offset correction coefficient calculation is performed. The coefficients are sentback to the interface board for offset correction through DIA.
Figure 3.3 UFPA camera platform.35
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 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: 33processing module by a scan conve
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 and 56: 43performed at Inframetrics to dete
Page 57 and 58: 45c) Heating of the TEC without hea
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

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

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