Figure 16.
Parameters of an Imaging System
2
1
3
1. Horizontal Imaging Width
2. Working Distance
3. Horizontal Field of View
For example, if the working distance of the imaging setup is 100 mm, and the focal length of
the lens is 8 mm, then the field of view in the horizontal direction of an ISC-1780 is
���
ℎ���������
=
0.0048 �� × 640 × 100��
8 ��
= 38.4 ��
The field of view in the vertical direction is
���
ℎ���������
=
0.0048 �� × 480 × 100��
8 ��
= 28.8 ��
Based on the results of these two equations, you can adjust the various parameters until you
achieve the right combination of components that match your inspection needs. This might
include increasing the working distance, choosing a lens with a shorter focal length, or
changing to a higher resolution camera.
Related Information
Gain
Gain is a multiplier applied to the analog signal prior to digitization. Increasing the gain
increases the amplitude of the signal. Gain allows you to trade off between making smaller
signals more visible at the cost of increased noise and no longer being able to differentiate
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ISC-178x User Manual
Summary of Contents for ISC-1783
Page 1: ...ISC 1783...
