4D Technology optical interferometers use proprietary, high speed, high resolution wavefront sensors to measure the shape of optical surfaces with extreme accuracy.
In a standard, phase-shifting interferometer, multiple frames of data are acquired over many milliseconds—enough time for vibration and turbulence to significantly degrade the measurement results. In 4D systems, all phase data is acquired simultaneously, in as little as thirty microseconds. This feature enables 4D interferometers to measure anything characterized by conventional interferometers, but in the noisiest environments, without isolation or air turbulence abatement.
Dynamic interferometry® enables complex tests between multiple unisolated tables, measurements in environmental chambers, and long stand-off distances. Odd shapes, pupil obscurations, poor signal contrast, moving parts, air turbulence and mechanical vibration are no problem. Special wavefront sensors have also been developed for wavelength insensitivity, higher spatial resolution, and applications with tight space restrictions.
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4D's patented wavefront sensors enable vibration
insensitive Dynamic Interferometry. Other patents pending. |
Tel: +1 (520) 294-5600