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 ...

A state-of-the-art experiment at the US Department of Energy’s (DoE) Fermi National Accelerator Laboratory is one step closer to collecting experimental data. Fermilab has announced that it has ...

Ten years ago, astronomers made an epic discovery with the Laser Interferometer Gravitational-Wave Observatory. Cosmology hasn’t been the same since, and it might not stay that way much longer. Out ...

Make an inexpensive laser interferometer. An optical interferometer splits a beam of light into two beams that travel at right angles, then recombines them. The resulting interference pattern reveals ...

Interferometry is a technique that combines light waves to produce interference patterns, which can be analyzed to measure distances, shapes, and surface features with extreme precision. 1 Thanks to ...

Ten years ago, astronomers made an epic discovery with the Laser Interferometer Gravitational-Wave Observatory. Cosmology hasn’t been the same since, and it might not stay that way much longer. By ...

Exail, the France-headquartered photonics company, says it has won a contract with the French Space Agency (CNES) to develop and deliver an “ultra-stable” laser system for the planned Laser ...

White light interferometry (WLI) is a contact-free optical method for measuring surface height. It uses the phase difference between the light reflected off a reference mirror and the target sample to ...