Wednesday, September 18, 2013

Advice for laser triangulation systems

Using a laser line to get height information is now so easy there are smart cameras that can do. (Check out and even the Cognex DS1000 to see for yourself.) Yes despite the advances, 3D still has some challenges.

Chief among these is calibration. If you’re doing 3D you probably want height information in inches or millimeters, so how do you convert pixels to real-world units?

There’s some good advice on this in “Calibration of 2D Cameras for 3D Inspection” published in Photonics Tech Briefs, May 1st 2013. And the article also discusses lens issues to be aware of when you’re doing triangulation.

If there’s a 3D project in your future, I encourage you to read and learn.

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