标签: cracorrection

CRAcorrectionOmniVisionCRACorrectionMatchingSensorstoLensesforBetterImagingSystemsJune2009SecurityB:HighlyConfidential1AgendaWhatisCRA?HowCRAaffectslightcollectionefficiencyofthesensorHowtomakeyourselectionSummarySecurityB:HighlyConfidential2WhatisCRA?CRAisanacronymforChiefRayAngleTheangleoftheincidentrayspassingthroughthecenterofthelensapertureMeasuredattheimagesensorCenterofthesensorCRA=0°CRAtypicallyincreasesforpixelsfurthestawayfromthecenterofthesensorChiefRay1LensApertureImageSensorChiefRay2CRA1OpticalaxisHalfFieldofViewCRA2SecurityB:HighlyConfidential3LightcollectionefficiencyreductionOn-AxisPixelCRA=0°Off-AxisPixelCRA=25°CommonCMOSpixelsbehavel……