1
Henri Bizot, Gery Charles J Brasselet, Jean Paul Louis, Georges Narcy: Process and apparatus for laser drilling. S N E C M A, Bacon & Thomas, August 26, 1986: US04608480 (64 worldwide citation)

A process and apparatus are disclosed for accurately drilling and calibrating holes via a pulsed laser beam to form a perforated work piece. The sounds emitted by the melting of the work piece due to its contact with the laser beam are sensed, converted into digital form, compared with a reference v ...


2
Henri Bizot, Jean Dautremont, Alain Sylvian: Process and apparatus for the precision measurement of rotor blade-height. Societe Nationale d Etude et de Construction de Moteurs d Aviation S N E C M A, Bacon & Thomas, January 28, 1986: US04566225 (20 worldwide citation)

A process and apparatus are disclosed for the precision measurement of the height of turbine rotor blades which enables the measurement of the height of individual turbine blades by utilizing a stroboscopically controlled laser beam. A grinding wheel is also associated with the apparatus to reduce t ...