CMOS ACTIVE PIXEL SENSOR TECHNOLOGY - AN …

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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 ( x-rays) ER FOSSUMPhotobitTECHNOLOGYSources of PhotonsTECHNOLOGYSources of PhotonsThi Three main sources SolarIncandescent lamp Incandescent lamp Fluorescent lamp Typically characterized by color temperature Typically characterized by color temperature Temperature of blackbody with roughly same color distribution Higher temp means more blue, less red -> looks white ER FOSSUMPhotobitTECHNOLOGYSPECTRAL (nm)NIRUV ER FOSSUMPhotobit

Photobit TECHNOLOGY Ph tPhotons • A photon is a “f( f )“bullet” of light (quantum view of light waves) • Energy is related to wavelength: E = hc/λ

  Active, Sensor, Pixel, Photon, Active pixel sensor