Phase-Shifting Interferometry (PSI) techniques have become fundamental in optical metrology for accurately measuring surface topographies and reconstructing three‐dimensional profiles. By generating ...

Dynamic interferometry allows precise optical measurements to be made on the factory floor. Steve Martinek explains the principle and technology behind the technique. The high-precision interferometry ...

Common to optical metrology in many modern systems, the Fizeau design uses a fixed, on-axis coherent point source to illuminate the interferometric cavity. For the most part, it works very well. While ...