John Lewis

John Lewis is market development manager of Cognex Corp. (Natick, MA). For more information, call (508) 650-3000 or visit www.cognex.com.

ARTICLES

Use Optical Filtering to Improve Machine Vision Repeatability

Optical filters have been used to help solve difficult machine vision challenges
By Jason Dougherty and John Lewis
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Although optical filters are often viewed as an afterthought in machine vision applications, their ability to optimize lighting and the entire vision system makes them so valuable that they should be considered from the initial planning stages of most applications.


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Measurement

How to Choose the Right Lighting for Machine Vision Applications

“The most sophisticated automated inspection system in the world cannot work without the proper lighting.”
By John Lewis
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Machine vision systems create images by analyzing the reflected light from an object, not by analyzing the object itself.


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Vision & Sensors - Best Practices

Using Optics to Optimize Your Machine Vision Application

Explaining the fundamentals of using optics to optimize a machine vision application.
By John Lewis
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The lens is responsible for creating sufficient image quality to enable the vision system to extract the desired information about the object from the image.


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Choosing the Appropriate Sensor Technology

By John Lewis and Greg Wiese
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Photoelectric sensors, vision sensors and vision systems: how to determine which is the most effective solution.
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 In honor of World Quality Month, we spoke to James Rooney, ASQ Past Chairman of the Board of Directors 2013, for his take on quality around the world.
For more information, read the ASQ Speaking of Quality column.
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2014 August

Check out the August 2014 edition of Quality Magazine for features!

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