What Is MTF Testing And Why It’s Important

Modulation Transfer Function (MTF) has been closely associated with the increase of quality in conjunction with resolution. Metrology scientists look towards MTF as a mode of characterization for optical...

Modulation Transfer Function (MTF) has been closely associated with the increase of quality in conjunction with resolution. Metrology scientists look towards MTF as a mode of characterization for optical systems. MTF Testing is incredibly important to ensure the performance of all optical systems.

What is MTF Testing?

The testing of MTF is crucial to the integrity of images. Contact lenses, video systems, photographic optics and photolithographic optics are some examples that depend on MTF testing to ensure the quality of an image. Since MTF can be quantitatively measured, testing the quality of an image is much easier and can be simplified into a series of processes.

Why do images need to be tested?

The structure of an image can be classified as a function with MTF. The spatial frequencies are simplified through spread function which helps in various tasks. Most of the time, an imaging system will be used to represent an object through the use of detailed symbols and components. Technology that depends on the integrity of an image will work better if the resolution is higher.

A higher resolution, however, does not always mean that the quality of an image is better. MTF testing is done to ensure the integrity of an image even if it is rescaled. A good example would be a hand magnifier that rescales an image size to the naked eye without modifying the structural integrity of what is being looked at.

What are other uses of MTF testing?

With the use of a video imaging system, each frame of an image that’s coming or going through the lens will be interpreted in a different manner. Through a series of processes, the width and height of the pixels will have to be calculated in order to ensure that the imagery that the lens captures is corrected for the scale and quality when viewed on another interface.

Since MTF testing is used by many engineers that work in different fields, it’s agreed upon that it’s a highly reliable manner of ensuring that the integrity and quality of an image are kept. There will be little to no expectation of manual human modifications done on an image unless it’s necessary to correct the contrast or resolution of an image after a test.

Is MTF the standard way of testing?

Thanks to the acceptance of MTF testing as a good measurement of image quality and integrity, it’s been standardized by many engineers to ensure that the interpretation of an image that’s coming from a source, even if a device is not expected to be backward compatible, can be trusted. MTF makes system testing incredibly similar to an actual applied environmental testing.

The integrated polychromatic performance of many different optical systems can be approached directly through the use of MTF. A wide spectrum of tests can be tuned in congruence to other spectrums such as infrared bandpass filters, photopic filters, and color filters. There will be no need for replacements or substitutions unless there is a specific use for the system. Do you need MTF Testing equipment? Image Science can help design and build it for you. Contact us and let’s discuss what you need.

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