Cognex MVS-8100C Hardware Manual
23
Installing Light Control
Hardware
This chapter describes how to connect the acuLight and UltraLight light modules to the
MVS-8100C frame grabber.
Dynamic Light Control Overview
The term
light module
refers to any of the following Cognex products: acuLight,
acuLight II, UltraLight, or UltraLight II. A light module provides dynamic
software-controllable illumination to a camera’s field of view. A light module can be
attached around the camera lens or mounted separately.
Cognex frame grabber hardware and Cognex software can be used together to control
Cognex light modules dynamically. This means that power to the LED arrays in the light
module can be adjusted up or down in mode and intensity to obtain the best image to
capture for vision processing. Dynamic control of lighting is especially important in chip
wafer manufacturing, where light shining onto the reflective surface of the wafer can
make images hard to capture.
Figure 10 shows two sets of wafer scribe images, each with and without light module
illumination.
Figure 10. Examples of image improvement with dynamic light control
The light module works with Cognex software to achieve the optimal contrast between
a wafer scribe mark and the background.
Before
After
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