H - Electricity – 05 – G
Patent
H - Electricity
05
G
358/11.05
H05G 1/46 (2006.01) G01T 1/164 (2006.01)
Patent
CA 1081869
ABSTRACT: An automatic control system for a scintilla- tion camera which is integrated in tile image pick-up device, with photomultipliers of the camera, notably one used for gammagraphy. A configuration of radio- active sources cooperates with the said photomul- tipliers in order to form interaction regions which are "seen" by the said photomultipliers at a given angle and in a number which is dependent of the po- sition of the photomultipliers relative to the sour- ces. The circuits cooperating with the said system are analog or digital circuits. Control is dependent on the one hand of the signal which is obtained by comparing a reference signal and a signal which is supplied by each photomultiplier in a ratio which is determined by the number of regions "seen" by the photomultiplier, and on the other hand of the num- ber of regions which contributes to the formation of the reference signal.
263400
Jatteau Michel
Pauvert Joseph
Fetherstonhaugh & Co.
N.v. Philips Gloeilampenfabrieken
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