Additive Manufactured Parts

Precision Metrology of Additive Manufactured Parts

Additive manufacturing (AM) is a relatively new and growing technique which is complimentary to more conventional, subtractive methods like machining. The major advantage of AM is that it allows the manufacturing of complex geometries and the creation of internal features that cannot be easily produced using subtractive methods. One major disadvantage of AM, however, is the reduced control of surface quality and dimensional tolerances.

Currently, there is a growing need for characterizing surface topography and texture for the wide range of surfaces that AM can produce. As the industry and technology advances, manufacturers require precise measurement of surface shape, texture, and geometrical features on a wide variety of surfaces, materials, and part geometries.

3D Surface Measurement of Additive Manufactured Part

Precise surface topography measurement for AM produced surfaces and parts can be a challenging task for many optical metrology techniques. Based on innovative coherence scanning interferometry (CSI), ZYGO’s 3D Optical Profilers can precisely and quickly measure surface features with high slopes or low reflectance (based on patented MoreData™ technology), making them invaluable tools for process development and quality control of AM parts.

In summary, ZYGO CSI technology enables significant advantages for surface metrology of AM parts:

  • Non-contact, 3D areal technique • High data density and high speed (seconds per measurement)
  • Sub-nanometer height precision at all magnifications
  • High dynamic range (HDR) and low signal to noise (SNR)
  • Data capture on high slopes, rough/low-reflectivity surfaces
  • Variable measurement area (low to high magnification) • Enhanced surface topography visualization, real color imaging

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