Vision Basics - Camera Calibration and Lighting Infrared Filters CCD cameras usually have a relatively high sensitivity to infrared light. Warm or hot objects emit infrared light (which is invisible to the human eye). If you suspect your camera data may be inaccurate due to infrared emissions, try placing an infrared filter over the lens. Related Topics Adding Vision Devices Calibration Overview ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 314