iTIRM: A nondestructive measuring technique to monitor surface quality during grinding and polishing

A new measurement method, called iTIRM, is presented. It is capable of measuring the surface quality, roughness and subsurface damage, of optical surfaces in a nondestructive way. Measurements have been carried out and are presented, showing the capability of iTIRM to quantify the quality of optical surfaces and to localize surface defects. The...

Spatial prediction of the variability of Early Pleistocene subsurface sediments in the Netherlands - Part 1: Heavy minerals

We investigated the spatial variability of the heavy-mineral composition in the Early Pleistocene fluviatile Kedichem Formation in the Netherlands in order to meet the demand for more information about subsurface sediment composition. We first determined the spatial extension and thickness of the sediment body, then used Fuzzy clustering...

Spatial prediction of the variability of Early Pleistocene subsurface sediments in the Netherlands - Part 2: Geochemistry

We started a geochemical mapping campaign in the Early Pleistocene fluviatile Kedichem Formation in the Netherlands in order to meet the demand for more information about subsurface sediment compositions. Geochemical data were collected during a sampling campaign, and about 600 samples from the Kedichem Formation were analyzed. By linking the...

Subsurface damage measurements as a tool for process monitoring

A new method is presented that is capable of measuring the surface quality, including subsurface damage, of optical surfaces. This method, called iTIRM, can easily be automated and used for process control and as an investigation tool for optical fabrication processes.