Fairchild CAM/CMOS-2K.LS user manual Lens Modeling

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4.9 Lens Modeling

Several camera companies have included this and like information in their manuals. For reference material it is very useful.

The focal point is the point at which the image of an infinitely distant object is brought to focus. The effective focal length (f’) is the distance from the second principal point to the second focal point. The back focal length (BFL) is the distance from the image side of the lens surface to the second focal point. The object distance (OD) is the distance from the first principal point to the object.

Figure 4.9.1

Fairchild Imaging • CAM/CMOS-2K.LS Line Scan Camera User’s Manual • Rev C• 31 of 42

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Contents OWL Camera Series CAM/CMOS-2K.LS EMC EMC ConformanceTerminology CAM/CMOS-2K.LS Line Scan Camera Rev B Fairchild Imaging, IncTable of Contents Camera Link Introduction TroubleshootingHandling Instructions Product SupportUsability Camera HighlightsDescription ProgrammabilityFull Spectrum of Applications Camera Specification RDI and Mrdi Performance SpecificationLink Thermal ConsiderationsRDI and Mrdi Responsivity Curve Image Sensor Page Connectors, Pinouts, and Cables Installation OverviewCamera Hardware Interface Camera Pin # Frame Grabber Pin # Channel Link Signal Power SupplyHirose Receptacle LED Indicator Status LampBack View of CAM/CMOS 2K.LS Camera Control CommandsQuick Start with the Camera LinkTM Interface You must cover lens when performing this operation SSM LED Command Definition Summary Camera Command SummaryGSN Four Modes for Synchronizing with the CAM/CMOS 2K.LSSummary of CAM/CMOS-2K.LS Modes Line Start End 1 -- Mode 1 Freerunning 2 -- Mode 2 ExSync Synchronization ExSync Camera Input LineValid Camera Output ElectShutter CAM/CMOS-2K.LS Synchronization Timing ValuesMechanical and Optical Guidance Camera Dimensions and Mounting FacilitiesLens Mount Extender Tube LensingPage Page Light Sources LensesPositioning Accuracy of the Sensor Chip in the Camera IlluminationLens Modeling Preventing ESD Damage Cleaning the Sensor WindowHandling Instructions Electrostatic DischargeOther Areas You Should Check TroubleshootingCheck the Obvious Things Out First Use the Camera Control Interface to Perform ChecksHorizontal Lines or Patterns in Output Data Clocking/Output SignalsNo Output Or Non Specification Output Everything Seems To Be Working, But No ImageProduct Support Camera LinkTM Introduction Channel Link is a Widely-Used Signaling MethodCamera Control Signals Video Data SignalsCommunication Port Assignments PowerFor More Information on CameraLinkTM Figure A.1 Channel Link Operation Camera Link Connections -- the MDR 26-Pin ConnectorPage Page Figure A.4 Camera Link Cable