What we measure
Novacam low-coherence interferometers provide non-contact 3D metrology and imaging with sub-micron precision.
Types of objects, surfaces and materials
- objects: industrial components and materials, films and coatings, biological tissues
- industrial materials: plastics, polymers, glass, metals, silicone, adhesives, specular or non-specular, reflective, non reflective, turbid, semi-transparent or transparent
- material transparency: For thickness or cross-sectional measurements, the maximum depth of light penetration depends on the material index of refraction. Most materials are somewhat transparent. Thickness of completely non-transparent films can be addressed by combining low-coherence interferometry with LIBS technology.
- sample sizes: objects from several microns wide. No upper limit.
- range of surface shapes: rough, smooth, interiors of bores and small-diameter tubes, exteriors of cylinders, concave or convex spherical shapes, filaments, thin tubing
- static or moving surfaces: rotating or spinning objects, web inspection, in-tray inspection
- material states: solid, liquid
- sample temperature: from cryogenic to very hot
- 3D surface coordinates: resolution XY < 5-75 µm, Z < 0.5 µm
- 3D surface characteristics: including shape, roughness, and volume loss
- material thickness: thickness of single or multilayer films, up to 8 mm deep. This depth can be extended further by attaching optical probe to a mechanical displacement axis.
- long profiles
- index of refraction
- vibration measurements: vibration frequency and intensity, shaft eccentricity
Data for visualisation
- 3D models, surface profiles, depth profiles (A-scans), 2D cross-sections (B- or C-scans), 3D volumetric images
- simultaneous dimensional and surface inspection 3D GDT, roughness, color etc.
- very high scanning speeds, 1-30 kHz and higher, depending on the system model
- can reach in to measure hard to reach surfaces, such as insides of small-diameter tubes and bore holes
- can measure surfaces with high aspect ratio features, such as steps, grooves, channels, holes and steep slopes
- versatile to deploy in-process or off-line with fiber-based probes mounted on online or benchtop fixtures. Small-diameter optical probes operate next to sample surface; optical signals are forwarded to interferometer box via optical fibers. Fibers can be up to 1 km long with no signal deterioration.
- acquires long profiles: no need for time-consuming surface tiling
- can perform in hostile environments: radioactive, cryogenic, very hot, evaporation chambers, etc.
- knows the absolute distance of the sample surface when the instrument is turned on (without counting fringes)
- resistant to air perturbation, lighting and to cutting the beam