Conoscopic holography inspection

The Conoscan non-contact inspection probe uses patented `conoscopic holography’ to create precise 3D digital images of virtually any surface – for example, awkward shapes, angles, materials or sizes – at very high speeds, and at stand-off distances once thought unfeasible.

Conoscopic holography is the optical interference effect produced by doubly refracting crystals illuminated with convergent polarised light rays. Applications are wide ranging and include measuring the thickness of high density PCBs, radius and steep angle measurements of moulded plastics products and dimensions and radii of any precision machined parts.

Further details from Spectrum Metrology.