In the November 2015 issue of Laser Focus World, several different products, including OptiPro’s UltraSurf non-contact metrology system, are highlighted as interferometric solutions to measuring aspheres. UltraSurf utilizes non-contact point sensors which can include a low-coherence interferometer to measure inside and outside surfaces at the same time, or a white light confocal system to measure individual optical surfaces.
Interferometers: Numerous ways exist to interferometrically measure aspheres
