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Lighting Techniques

 

Backlight1

Back lighting generates instant contrast as it creates dark silhouettes against a bright background. The most common uses are detecting the presence/absence of holes, part placement/orientation and for the precision measurement of objects.

Backlight2

Have a look at our nimbus backlight

Nimbus Back Light

Direct Bright Field 1

This is the most commonly used lighting technique. It is directional in its nature, normally from a single point source, and it is a good choice for generating contrast and enhancing topographic detail.

Direct Bright Field 2

Diffuse Dome 1

Diffuse dome lights are very effective at lighting curved, specular surfaces. To be effective, diffuse lights, particularly dome varieties, require close proximity to the sample.

Diffuse Dome 2

Doal 1

With a DOAL, light rays reflect off the beam splitter directly on to the object at nearly 90°. With this approach, specular surfaces perpendicular to the camera appear bright, while surfaces at an angle to the camera appear dark.

Doal 2

Dark Field 1

This type of lighting is characterised by low angle of light incidence and typically requires close proximity. Only small amounts of light are reflected back to the camera from edges satisfying the “angle of reflection equals the angle of incidence” equation.

Dark Field 2