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Nano Series GigE Vision Camera
Additional Reference Information
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Light Sources
Keep these guidelines in mind when selecting and setting up light source:
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LED light sources are relatively inexpensive, provide a uniform field, and longer life span
compared to other light sources. However, they also require a camera with excellent sensitivity.
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Halogen light sources generally provide very little blue relative to infrared light (IR).
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Fiber-optic light distribution systems generally transmit very little blue relative to IR.
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Some light sources age such that over their life span they produce less light. This aging may
not be uniform—a light source may produce progressively less light in some areas of the
spectrum but not others.
IR Cut-off Filters
Genie Nano cameras are responsive to near infrared (IR) wavelengths. To prevent infrared from
distorting the color balance of visible light acquisitions, use a “hot mirror” or IR cut-off filter that
transmits visible wavelengths but does not transmit near infrared wavelengths and above.
All models of Genie Nano color cameras have a spectral response that extends into near IR
wavelengths (as defined for each sensor model in the sensor specification descriptions). Images
captured will have washed out color if the sensor response is not limited to the visible light band.
The following graphics shows the transmission response of typical filters designed for CMOS sensor
cameras. When selecting an IR cut-off filter, choose a near infrared blocking specification of
~650nm. Filters that block at 700nm or longer wavelengths, designed for CCD cameras, are not
recommended for Genie Nano color cameras.