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![](https://midopt.com/wp-content/uploads/2023/10/gaussian-filter-profile-midopt-machine-vision-3.gif)
The spectral output from a single color LED light source used in any vision application typically follows a normal Gaussian or “bell shape” profile.
For a machine vision Bandpass Filter to be most effective, the position, height and width of the passband should approximate this bell-shaped curve.
![](https://midopt.com/wp-content/uploads/2023/10/MidOpt-Bandpass-Filters-Matching-1.png)
MidOpt® offers the largest selection of Bandpass Filters designed to match the output of every industrial LED light currently available.