https://go.optimaxsi.com/measurement-mid-spatial-frequency
Measurement of mid-spatial frequency errors on freeform optics using deflectometry
Freeform optics have emerged as a new tool for optical designers and integrators. Manufacturing innovations are gradually increasing availability of precision...
spatial frequencyfreeform opticsmeasurementmid
https://www.virelux.com/home
Virelux Inspection Systems | Deflectometry | Metrology | Differdange
Virelux | Inspection Systems | Deflectometry | Metrology | Differdange
inspection systemsmetrologydifferdange
https://www.vew-gmbh.de/en/optical-metrology/surface-analyzer-deflectometry-system
Surface Analyzer Deflectometry System
surface analyzersystem