Photoemissive cathode and method of using comprising either cadmiumtelluride or cesium iodide
US4069438A · kind A · utility
7Cited by
13References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1975 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Sep 18, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0545
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for the electrostatic recording of x-ray images comprises two spaced electrodes with a gas-filled gap therebetween. One of the electrodes comprises a layer of an ultraviolet emitting fluorescent material and a layer of an air-exposable ultraviolet-sensitive photoemitting material. A plastic sheet is adjacent to the other electrode. An electric field is applied across the gap to accelerate photoelectrons emitted by the photoemitting material. The electrostatic image formed on the plastic sheet is developed xerographically after the exposure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.