Title:
【発明の名称】スリットラジオグラフィ装置
Document Type and Number:
Japanese Patent JPH04507362
Kind Code:
A
Abstract:
A slit radiography apparatus is provided with an absorption device (8) which operates in conjunction with a slit diaphragm (2). The absorption device comprises electrically controllable piezo-electric tongues (11, 46). A control device (10, 30) provides electrical control signals for the tongues. A damping device is present for each tongue to receive the respective control signals for the tongues. It comprises for each tongue an EMF measuring circuit (34) and provides during operation, an output signal which represents the counter-EMF generated by the relative tongues. The relative output signals are combined with the control signals for the tongue concerned and act to counteract any uncontrolled vibrations of the tongues.
Inventors:
Gerk, Ronald Yang
Application Number:
JP51173190A
Publication Date:
December 24, 1992
Filing Date:
August 10, 1990
Export Citation:
Assignee:
Be Fau Optiche Industry De Oude Delft
International Classes:
G21K1/04; H05G1/26; A61B6/06; (IPC1-7): A61B6/06; G21K1/04
Attorney, Agent or Firm:
Nishikyo Keiichiro (1 outside)