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Alicona G4 InfiniteFocus

The Alicona G4 InfiniteFocus is a metrological tool that uses ‘Focus-Variation’ to measures form and roughness of surfaces.

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The Alicona G4 InfiniteFocus is a metrological tool that uses ‘Focus-Variation’ to measures form and roughness of surfaces.  ‘Focus-Variation’ combines the small depth of focus of an optical system with vertical scanning to provide topographical information from the variation of focus.  As well as topographical information, the colour CCDs provide RGB allowing colour imaging that can be merged with the colour-height mapping.

3D optical profilometer
Alicona G4 InfiniteFocus

The Alicona is excellent for rough surfaces and most engineering surfaces, but struggles with highly polished surfaces.  It is good for opaque and translucent materials, but transparent are challenging.

Objective magnification 2.5× 10× 20× 50× 100×
Working distance mm 8.8 23.5 17.5 19 11 4.5
Lateral measurement range (X,Y) mm 5.63 2.82 1.62 0.81 0.32 0.16
(X x Y) mm² 31.7 7.85 2.62 0.66 0.01 0.03
Vertical resolution nm 2300 410 100 50 20 10
Height step accuracy (1 mm) % n.a. 0.05 0.05 0.05 0.05 0.05
Max. measurable area mm² 10000 10000 10000 10000 3965 990
Optional mm² 40000 40000 40000 24780 3965 990
Min. measurable roughness (Ra) µm 7 1.2 0.3 0.15 0.06 0.03
Min. measurable roughness (Sa) µm 3.5 0.6 0.15 0.075 0.03 0.015
Min. measurable radius µm 20 10 5 3 2 1

Below there is a link to the user guide for the Alicona G4 InfiniteFocus

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