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Lighting

Lighting is one of the most critical elements in a vision system and is in fact key to achieve stable and repeatable results. Incorrect illumination may result in extensive and time consuming image processing or, in the worst case, in crucial information loss.

Opto Engineering® lighting solutions, from standard to custom products, are the result of our optical knowledge and are designed with our guiding principle in mind: “simple works better”.

We design and manufacture both lighting and optics. Many of our lighting solutions are conceived to perfectly match our lenses or even to be directly integrated into our optical systems: this approach allows to make the most out of lighting products and greatly simplifies vision system integration, since our products are truly optimized both optically and mechanically.

Opto Engineering® machine vision lighting products include both LED illuminators and pattern projectors, designed to meet the needs of the most demanding industrial environments. Our innovative products enable reliable inspections in many applications thanks to their flexibility, robustness and ease of use.

  1. LED Illuminators selection chart
  2. LED line lights selection chart
  3. 3D Optics AOI application notes
Read more...
LED Illuminators Advanced lighting solutions.
Advanced lighting solutions
LED Pattern projectors

Advanced structured lighting.

LED patterns projectors
Custom lights Design and build a custom light specifically tailored for your application
Design and build a custom light specifically tailored for your application

Basics

Illumination is one of the most critical components of a machine vision system. The selection of the appropriate lighting component for a specific application is very important to ensure that a machine vision system performs its tasks consistently and reliably.

The main reason is that improper illumination results in loss of information which, in most cases, cannot be recovered via software. This is why the selection of quality lighting components is of primary importance: there is no software algorithm capable of revealing features that are not correctly illuminated.

To make the most appropriate choice, one must consider many different parameters, including:

  1. Lighting geometry
  2. Light source type
  3. Wavelength
  4. Surface property of the material to be inspected or measured (e.g. color, reflectivity)
  5. Item shape
  6. Item speed (inline or offline application)
  7. Mechanical constraints
  8. Environment considerations
  9. Cost

Since many parameters must be considered, the choice can be difficult and sometimes the wisest advice is to perform feasibility studies with different light types to reveal the features of interest. On the other hand, there are a number of simple rules and good practices that can help select the proper lights and improve the image quality.

For every application, the main objectives are the following:

  • Maximizing the contrast of the features that must be inspected or measured
  • Minimizing the contrast of the features of no interest
  • Getting rid of unwanted variations caused by:
    • Ambient light
    • Differences between items that are non-relevant to the inspection task
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