Apparatus for detecting changes in a natural ocean wave pattern
Calibrating a focused beam of energy in a solid freeform...
Device for measuring the contour of a surface
Method and apparatus for detecting a focussing condition of an o
Method for optically measuring a roughness profile of surface
Method of and apparatus for recording surface irregularity of ob
Method of evaluating an optical transmission path
Optical sheet and optimizing method thereof
Procedure and apparatus for determining the geometrical shape of
Scanning differential photoelectric autocollimator
Surface profile measuring device and method