Advantages of Novacam’s fiber-based LCI technology

Unique design

Novacam metrology systems offer many advantages to our clients thanks to a unique combination of:

  • Low-coherence interferometry (LCI) technology
  • Modular, fiber-based design, meaning that the optical probe that scans the measured part is connected to the signal-processing detector (low-coherence interferometer) with an optical fiber that can be hundreds of meters long without signal degradation.
  • A selection of non-contact optical probes to satisfy most metrology applications – standard, small-diameter (down to 0.5 mm diameter), long (as long as 2 m has been built), rotational, or galvo (raster) scanning probes

Advantages

Advantages of Novacam 3D metrology systems include:

  • Sub-micron measurement precision 
  • Very high scanning speeds–2,100 to 100,000 Hz (i.e., 3D-point measurements per second), depending on the interferometer model
  • Ability – with the same system – to measure 
    • 3D geometry (3D GD&T parameters),
    • thickness,
    • roughness, and/or
    • defects
  • Ability to measure hard to reach surfaces, such as the insides of small-diameter tubes and bore holes, with small-diameter probes that can reach inside such spaces
  • Ability to perform in hostile environments: can measure in radioactive, cryogenic, or very hot environments, vacuum or evaporation chambers, through glass or sapphire windows, standoff distance of up to 1 m, measurements in water
  • Versatility for deployment right in process.  The fiber-based modular design of the system brings many advantages: while the fiber-based probes (mounted on either online or bench-top fixtures) operate next to the measured surface, their optical fiber connection to the system interferometer can be hundreds of meters long with no signal deterioration.  A standoff distance (from probe tip to sample surface) of up to 1 m is also possible.
  • Support for automation. Novacam probes and scanners are easily deployable on robot arms, as well as any application-specific benchtop or inline motion mechanism
  • Ability to measure surfaces with high-aspect-ratio features, such as steps, grooves, channels, holes and steep slopes.  Thanks to collinear scanning, no triangulation angle is necessary.
  • Ability to acquire long profiles. The probes acquire 3D data one point at a time, at high scanning speeds (see above). As such, they can continuously measure material on production line webs. Typically, there is no need for time-consuming surface tiling.
  • Knowledge of the absolute distance of the sample surface when the instrument is turned on (without counting fringes)
  • Resistance to air perturbation, lighting and to cutting the beam
  • Ability to multiplex several probes/scanners to the same interferometer, enabling the scanning of a variety of parts with various types of probes with the purchase of only one interferometer.  This capability provides additional return on investment (ROI) for many of our clients.

Related links

 Contact us or request free sample analysis to see if low-coherence interferometers are suitable for your application