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National Instruments Corporation
3-1
NI 17xx Smart Camera User Manual
3
NI Smart Camera Image Sensor
This chapter provides an overview of the NI Smart Camera image sensors,
field of view, spectral response, partial scan mode, binning, gain, and
hardware binarization. NI 1722/1742/1762 Smart Cameras use a VGA
sensor. NI 1744/1764 Smart Cameras use an SXGA sensor. Refer to
Appendix A,
, for information about your smart camera
image sensor.
Field of View
The field of view is the area under inspection that will be imaged by the
NI Smart Camera. It is critical to ensure that the field of view of your
system includes the object you want to inspect.
To calculate the horizontal and vertical field of view (FOV) of your imaging
system, use Equation 3-1 and the specifications for the image sensor of
your smart camera, as listed in Appendix A,
.
(3-1)
where
FOV
is the field of view in either the horizontal or vertical
direction,
Pixel Pitch
measures the distance between the centers of adjacent
pixels in either the horizontal or vertical direction,
Active Pixels
is the number of pixels in either the horizontal or
vertical direction,
Working Distance
is the distance from the front element (external
glass) of the lens to the object under inspection, and
Focal Length
measures how strongly a lens converges (focuses)
or diverges (diffuses) light.
FOV
Pixel Pitch Active Pixels
×
Working Distance
×
Focal Length
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