Matrix-form radiation image converter
An image converter is used to make visible images produced by gamma rays or similar penetrating rays like X-rays, etc., by transforming the distribution of ray density contained in a bundle of rays carrying the image which is to be made visible, by means of a cathode and an anode spaced from the cathode. The space between the electrodes contains a gas and the electrodes are subjected to a voltage which produces electrical discharges during ray penetration at corresponding locations depending upon the rays. The cathode as well as the anode consists of a plurality of parts having large surfaces which extend at least approximately perpendicularly to the ray incoming surface of the converter, so that the electric field extends parallel to this surface. The invention is particularly characterized in that the gas is under pressure in the range of 10 at., that the applied voltage makes certain the operation in the proportional range and that parts of the anode and of the cathode are combined in rows. Rows of the cathode elements and those of the anode extend at an angle to each other, the rows being connected electrically with a device for forming an electronic intensity center which produces representable local signals for orientation of the discharge bundle striking the anode. (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-33-029205
- Assignee:
- to Siemens Aktiengesellschaft
- Patent Number(s):
- US 3930162
- OSTI ID:
- 4045917
- Resource Relation:
- Patent File Date: 1972 Jun 21; Other Information: G01t1/18. Orig. Receipt Date: 30-JUN-76
- Country of Publication:
- United States
- Language:
- English
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