Key Components of MTF Testing

How can you pick the right MTF company like image-science.com? Before you start your search it helps to know some of the main components of Modulation Transfer Function (MTF) testing. Here are some of them

  1. Contrast

It’s a good idea to normalize the bar target’s intensity by giving it a maximum value to the white bars as well as a zero value to the black bars. When the values are plotted in a square wave the idea of contrast can be seen more easily. When the same idea is applied to imaging samples the intensity pattern before/after the imaging I visible. Contrast/modulation then can be dined by how closely the minimum/maximum intensity values are moved from the object plane to the image plane.

  1. Resolution

This it eh ability of an imaging system to distinguish detail. There are different ways it’s expressed including line-pairs per millimeter or frequency. Inverting the frequency results in the spacing in mm between 2 resolved lines. A good way to test system performance is bar targets that contained a group of white/black bars that are alternating and equally spaced.

In the case of all imaging optics when those patterns are imaged a perfect line edge turns somewhat blurry. High-res images show a big amount of detail that results from little blurring. Meanwhile, images that are low-resolution lack sharp detail.

So the next issue is why MTF is important. In traditional system integration the performance of the system is estimated basically by using the weakest link principle. This proposes that the resolution of the system is only limited by the part with the lowest resolution. The approach is helpful and results in quick calculations it’s not a good option since each component in the system causes error in the image. This results in poorer image quality than just the weakest link.

Each component in a system has a MTF linked to it. As a result, it affects the system’s overall MTF. That includes the camera sensor, imaging lens, video cables, and capture boards. The MTF of a system is the result of the MTF curves of all of the components. For example, the testing of MTF curves of some lenses is very basic in order to determine which combo would result in the best performance. However, that’s not always the case.

This highlights the need to hire the right company to do MTF testing. It’s a very technical process so you’ll certainly want a company with the right equipment and know-how to do the testing for you. This is why it’s critical to make sure you’ve found the right company to handle your MTF testing for lenses. If that’s the case then you’ll be on the right track to getting the right results.

Make sure you’re dealing with the right company to make sure you’re getting the best results. If you find the right company then it’ definitely worthwhile since you can deal with the same company for all your MTF testing. It can be tough to find multiple companies for different kinds of testing and would require more time and effort on your part.

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