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Vision Sensor SBSI/SBSC-EN, 8062650 - 1607b - 13/09/2016
Vision Sensor Manual
6.4 The most important types of illumination are: Bright field,
Dark field and Diffuse illumination.
6.4.1 Bright field illumination
Bright field internal / Bright field external
Fig. 322: Bright field illumination
With bright field lighting, the lighting, sensor and object are arranged so that the object’s surface reflects
the light directly into the sensor. The smooth surface of the object appears as a bright area and each
indentation, bump or defect, such as e.g. scratches, are a dark edge.
Attention: With bright field lighting, the angle of alignment between the lighting, object and sensor and the
object’s surface is critical as direct reflection by the object’s surface only works when the angle and
surface characteristics (shiny, mat, oily ….) are constant!
With Bright field / With Dark field
Fig. 323: Example Bright field illumination
By the direct reflection of the highly reflective (shiny) metal part, even before a white background, this is
possible to be distinguished and recognized with Bright field illumination! With Dark field illumination it´s
not possible to distinguish between shiny metal part and white background!
Summary of Contents for SBSC-EN
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