Author Archives: Moshe Danziger and Roei Yiftah

Optical Measurement of Narrow Holes

Optical Measurement of Narrow Holes

Measuring deep, narrow holes with a ratio of 1:5 (diameter: height) has always been a difficult and largely unsolved problem. It gets worse when we consider that not only the bottom surface needs to be scanned, but also the side walls which are characterized with steep angles that sometimes exceed 75°. This often causes multiple reflections from the side walls, which ruin the signal.

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