Measuring and testing – Vibration – By mechanical waves
Patent
1982-03-31
1984-08-21
Goldberg, Gerald
Measuring and testing
Vibration
By mechanical waves
73633, 73642, G01N 2900
Patent
active
044662866
ABSTRACT:
A scanner for periodically scanning an object to be examined with a beam of ultrasonic radiation. A transducer mounted within a housing emits a beam of ultrasonic radiation. The beam is guided and deflected respectively to a continuously rotating scanning reflector which is disposed opposite a stationary object reflector, from which the beam is directed to the object. The beam propagation path further includes a first focussing member adapted to focus the beam to a focal point within the housing, and a second focussing member adapted to focus the beam to a focal point within the object. In a preferred embodiment the first focussing member can be selectively adjusted. Thereby the focal area of the beam in the object can be conveniently shifted.
REFERENCES:
patent: 3245251 (1966-04-01), von Ardenne
patent: 3529465 (1970-09-01), Kleesattel et al.
patent: 4185501 (1980-01-01), Proudian et al.
patent: 4194510 (1980-03-01), Proudian
Berbee Hubertus J.
Thijssen Johannes M.
Voute Hendrik J.
Chapman, Jr. John E.
Goldberg Gerald
Marn Louis E.
N.V. Optische Industrie "De Oude Delft"
Olstein Elliot M.
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