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Lighting Education

Importance of Thermal Management in Machine Vision

When selecting individual components for or investing in turn-key machine vision systems, acceptable performance, system longevity, and cost are always high priorities. Other factors you should consider in the earliest stages of designing a machine vision system: thermal management and heat dissipation.

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Photometric Stereo Technique

For many surfaces, simple defects such as scratches and dents are easily identifiable with a machine vision camera and a traditional lighting solution. However, some objects have 3D aspects that make accurately identifying surface defects more difficult. To achieve feature-appropriate surface contrast to gather a 3D perspective, Photometric Stereo may be applied.

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When Adequate Lighting Isn’t “Good Enough”

Today there is a wide variety of lighting sources, types, geometries, and wavelengths available for vision engineers to apply, often with more than one type or geometry functioning adequately.  But with the many overlapping choices, how do we determine whether a lighting solution is, or is not, truly “good enough”?

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Cylindrical Surface Inspection

Not all surfaces respond similarly to standard direct illumination techniques. Surface color, texture, shape, and composition can all influence where and how much of the incident light is reflected into a vision camera, greatly affecting the inspection results. Read on for our example of inspecting a cylindrical surface.

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Bright Field vs. Dark Field Lighting Techniques

Determining whether to apply lights in a bright field versus dark field geometry is one of the more difficult decisions facing Machine Vision engineers. Both techniques have advantages and disadvantages: in this blog, we will concentrate on a comparison between the two using common vision applications.

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