This website requires certain cookies to work and uses other cookies to help you have the best experience. By visiting this website, certain cookies have already been set, which you may delete and block. By closing this message or continuing to use our site, you agree to the use of cookies. Visit our updated privacy and cookie policy to learn more.
This Website Uses Cookies
By closing this message or continuing to use our site, you agree to our cookie policy. Learn More
This website requires certain cookies to work and uses other cookies to help you have the best experience. By visiting this website, certain cookies have already been set, which you may delete and block. By closing this message or continuing to use our site, you agree to the use of cookies. Visit our updated privacy and cookie policy to learn more.
Quality Magazine logo
search
cart
facebook twitter linkedin youtube
  • Sign In
  • Create Account
  • Sign Out
  • My Account
Quality Magazine logo
  • Home
  • The Magazine
    • Current Issue
    • Digital Edition
    • Quality in Automation
    • Archives
    • How To Guide
    • Industry News
    • Subscribe
  • Web Exclusives
    • Coronavirus Coverage
    • Blogs
    • NDT Exclusives
    • Quality Exclusives
    • Vision & Sensors
  • New Products
  • Channels
    • Management
    • Measurement
    • NDT
    • Quality 101
    • Software
    • Test & Inspection
    • Vision & Sensors
    • Ask the Expert
  • Markets
    • Aerospace
    • Automotive
    • Electronics
    • Energy
    • Green Manufacturing
    • Medical
    • Plastics
  • More
    • Leadership 100 Survey
    • Plant of the Year
    • Professional of the Year
    • Job Board
    • White Papers
    • Quality Store
    • Software Downloads
    • eCards
    • Product Spotlights
    • Industry Links
    • Sponsor Insights
    • Market Research
  • Multimedia
    • eNewsletter
    • Podcasts
    • Videos
    • Webinars
    • Showcases
    • Image Galleries
    • Interactive Spotlights
  • Events
    • IMTS
    • Event Calendar
    • Quality Show
  • InfoCenters
    • First Article Inspection
    • Manage Quality, Risk & Compliance
    • Modern Quality Control with SPC
    • Process Control in Manufacturing
  • Directories
    • Buyers Guide
    • NDT Sourcebook
    • Vision & Sensors
    • Take a Tour
  • Contact
    • Contact Us
    • Advertise
Home » Authors » John Lewis

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

ARTICLES

machvis_FT

Use Optical Filtering to Improve Machine Vision Repeatability

Optical filters have been used to help solve difficult machine vision challenges
John Lewis Jason Dougherty
January 6, 2014
One Comment

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.


Read More
light bulb direct illumination
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.”
John Lewis
October 3, 2013
3 Comments

Machine vision systems create images by analyzing the reflected light from an object, not by analyzing the object itself.


Read More
Best Practices Edmund Optics
Vision & Sensors - Best Practices

Using Optics to Optimize Your Machine Vision Application

Explaining the fundamentals of using optics to optimize a machine vision application.
John Lewis
December 3, 2012
No Comments

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.


Read More

Choosing the Appropriate Sensor Technology

John Lewis Greg Wiese
April 29, 2008
No Comments
Photoelectric sensors, vision sensors and vision systems: how to determine which is the most effective solution.
Read More
Subscribe For Free!
  • Digital Edition Subscriptions
  • eNewsletters
  • Online Registration
  • Subscription Customer Service
  • Mobile Help

More Videos

Popular Stories

JimGems

Fail Successfully

machine vision

The Hybrid Approach

carbon fiber calipers

Calipers 102: The Basics and Beyond

INFICON engineers

Standardized Leak Testing for Lithium-Ion Battery Cells

VerisurfOpenX

Verisurf Software Partners With OpenX to Close Skills Gap

Events

January 20, 2021

Data Integrity: A Comparison of Point Cloud and Discrete Measurement Data

In this webinar, experts will explore an innovative, high-speed, non-contact technology that enables three-dimensional accuracy across all data points in a digital twin and contrast this technology with traditional measurement methods such as a CMM.

January 27, 2021

Eliminate Paper Processes: New Innovations and Cost Savings for Inspection Workflows

This webinar will explore the costs and inefficiencies around paper processes and introduce Digital Clipboard for automating process workflows and improving productivity, increasing data integrity, accelerating reporting and corrective action, as well improving traceability and training. 

View All Submit An Event

Poll

Topics to Talk About

What topics would you like to see Quality cover more?
View Results Poll Archive

Products

Quality Brain Teasers: Real World Challenges to Build Your Manufacturing Skills (ebook)

Quality Brain Teasers: Real World Challenges to Build Your Manufacturing Skills (ebook)

Assessments and Training in the following areas...

See More Products

SoftwareDownloads

Quality Magazine

Quality January 2021

2021 January

Check out the January 2021 edition of Quality: Analytics and QMS solutions, color management, leak testing for batteries, Quality 2021 Spending Survey, calipers and much more!
View More Create Account
  • Resources
    • Market Research
    • Custom Content & Marketing Services
    • List Rental
    • Partners
    • Manufacturing Group
    • Polls
    • Privacy Policy
    • Survey and Sample
  • Want More
    • Connect
  • Privacy
    • Privacy Policy
    • Do Not Sell My Personal Information
    • Privacy Request
    • Accessibility

Copyright ©2021. All Rights Reserved BNP Media.

Design, CMS, Hosting & Web Development :: ePublishing