National Instruments NI Vision NI 17xx 用户手册

© National Instruments Corporation

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.

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.

×

×

-----------------------------------------------------------------------------------------------------------------

=