Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1993-04-26
1995-08-22
Rosenberger, Richard A.
Optics: measuring and testing
By polarized light examination
With light attenuation
G01B 1124
Patent
active
054445361
ABSTRACT:
The curvature profile of edges, such as trailing edges of propulsion plant blades or vanes is measured by a device that uses a laser beam for illuminating the curvature profile. The laser beam is generated by a laser that causes its beam to pass through a radiation intensity matrix arranged between the laser and the curvature profile. The radiation intensity matrix has locally different intensity values for varying the laser beam intensity over the cross-section of the laser beam. Sensors are so arranged that they sense the reflection values of the laser beam along the curvature profile of the profile edge. The outputs of the sensors are operatively connected to a central processing unit for ascertaining the curvature profile on the basis of the sensed reflection values. Thus, even sharp edges, such as knife edges, cutting tool edges, or propulsion plant blade edges can be checked for their current quality.
REFERENCES:
patent: 4657394 (1987-04-01), Halioua
patent: 4709156 (1987-11-01), Murphy et al.
patent: 5003187 (1991-03-01), Zummbrunn et al.
patent: 5067817 (1991-11-01), Glenn
Mangold Edmund
Satzger Wilhelm
Fasse W. F.
Fasse W. G.
Hantis K. P.
MTU Motoren - und Turbinen-Union Muenchen GmbH
Rosenberger Richard A.
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