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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.

The systems has been used on usually tribological and corrosion samples, such as wear loss measurements, assessment of corrosion features and damage at impact sites, but also for additive manufactured structures and microfluid moulds dimensions and uniformity, and bio-fouled surfaces.

Projects involving the Alicona include:

Papers produced include:

Objective magnification 2.5× 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) ³¾³¾Â² 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 ³¾³¾Â² 10000 10000 10000 10000 3965 990
Optional ³¾³¾Â² 40000 40000 40000 24780 3965 990
Min. measurable roughness (Ra) µ³¾ 7 1.2 0.3 0.15 0.06 0.03
Min. measurable roughness (Sa) µ³¾ 3.5 0.6 0.15 0.075 0.03 0.015
Min. measurable radius µ³¾ 20 10 5 3 2 1

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

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