CMOS ACTIVE PIXEL SENSOR TECHNOLOGY - AN …
PhotobitTECHNOLOGYTECHNOLOGYCMOS ACTIVE PIXEL SENSOR TECHNOLOGY -AN INTRODUCTION-AN INTRODUCTION Dr. Eric R. Fossum ER FOSSUMPhotobitTECHNOLOGYIiStTECHNOLOGYIm aging SystemsTiming &OpticsTiming &DriverCircuitsDetectorPixelPixelArrayAS PAnalog Signal ProcessorAnalog to Digital ConverterDigital Signal ProcessorADC ER FOSSUMDigital Signal ProcessorDSPPhotobitTECHNOLOGYPh tTECHNOLOGYPhotons f(f) A photon is a bullet of light (quantum view of light waves) Energy is related to wavelength: E = hc/ High energyLow energyUltra-iltInfra-Short wavelengthLong wavelengthvioletredYiiifildkdYour eye is sensitive from violet to dark red450 nm - 700 nmSilicon is sensitive from violet to the near infrared (not thermal)400 nm1050 nm400 nm -1050 nmSilicon is also sensitive to higher photon energies ()
Photobit TECHNOLOGY Pixel SizesPixel Sizes • A pixel is aA pixel is a “picture elementpicture element” • More pixels means more RESOLUTION • More pixels means more DATA (could be a bad thing)
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