NED XCM20125GIG User Manual

Contents

NED XCM20125GIG User Manual Manual pdf 16 page image

NEDXCM20125GIG UME-0041-01162.3 Optical InterfaceThe lens mount depends on the type of camera.The amount and wavelengths of light required to capture useful images dependon the intended use. Factors include the property, speed, the object’s spectralcharacteristics, exposure time, the light source characteristics, the specificationsof the acquisition system and so on.The exposure amount (exposure time x light amount) is the most importantfactor in getting desirable images. Please determine the exposure amount afterstudying what is most important to your system.Keep these guidelines in mind when setting up your light source: LED light sources are relatively inexpensive, provide a uniform field andlonger life span compared to other light sources. However, they alsorequire a camera with excellent sensitivity. Halogen light sources generally provide very little blue relative to infraredlight (IR). Fiber-optic light distribution systems generally transmit very little blue lightrelative to IR. Metal halide light sources are very bright but have a shorter life spancompared to other light sources.Generally speaking, the brighter light sources, shorter life span.CMOS image sensors are sensitive to infrared (IR). We recommend usingdaylight color fluorescent lamps that have low IR emissions. If you use a halogenlight source, to prevent infrared from distorting the images use an IR cutoff filterthat does not transmit IR wavelengths.