Measuring and testing – Vibration – Sensing apparatus
Patent
1977-01-21
1978-11-14
Gill, James J.
Measuring and testing
Vibration
Sensing apparatus
356374, G01H 900
Patent
active
041250257
ABSTRACT:
An instrument for measuring the amplitude of vibration of a vibrating object consists of a first optical system for periodically projecting the image of a grating onto the vibrating object and second optical system having an optical axis intersecting that of the first optical system in the vicinity of the object, for sharing the image projected on and reflected from the object and recording the shared image on a photographic film. The measurement of the amplitude is obtained in the form of a moire pattern.
REFERENCES:
patent: 3245307 (1966-04-01), Lang
Suzuki Kiyoshi
Suzuki Masane
Yasuda Kenji
Fuji Photo Optical Co., Ltd.
Gill James J.
Razzano Pasquale A.
Stults Harold L.
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