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Configuring a 3D Triangulation Vision System

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DAN CALLEN, COHERENT INC.

Machine vision using laser-based, 3D triangulation is a powerful way to acquire rapid, accurate measurements of product shape and dimensions, and it can readily identify dimensionally nonconforming units on high-speed production lines. As a result, this technique is employed in industries as diverse as lumber mills and microelectronics manufacturing. But there are many different ways to implement a laser line projection system. Each has its own characteristics, advantages and disadvantages. Figure 1. A projected laser line appears distorted when viewed from perspectives other than...Read full article

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