Request InfoIDEX Health & ScienceThe Melles Griot Optics Group has unveiled additional Fizeau interferometer test optics to complement its line of Absolute Fizeau λ/40 transmission spheres. The Fizeau λ/50 concave and convex reference spheres enable users to record and store reference wavefronts for subtraction from interferometric test data, resulting in improved accuracy of their interferometer systems. 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