X-ray image intensifier tube and method of making same
Abstract
Abstract THE PRESENT INVENTION RELATES IN GENERAL TO METHODS FOR MAKING PICK-UP SCREENS FOR X-RAY IMAGE INTENSIFIER TUBES AND, MORE PARTICULARLY, TO AN IMPROVED METHOD WHEREIN THE X-RAY FLUORESCENT PHOSPHOR SCREEN ELEMENT IS FORMED BY EVAPORATION OF AN ALKALI METAL HALIDE MATERIAL IN VACUUM AND CONDENSING THE EVAPORATED MATERIAL ON AN X-RAY TRANSPARENT PORTION OF THE X-RAY INTENSIFIER TUBE, WHEREBY A CURVED X-RAY IMAGE PICK-UP SCREEN IS FORMED WHICH HAS IMPORVED QUANTUM EFFICIENCY AND RESOLUTION. SUCH IMPROVED X-RAY IMAGE INTENSIFIER TUBES ARE ESPECIALLY USEFUL FOR, BUT NOT LIMITED IN USE TO, X-RAY SYSTEMS AND FOR INTENSIFYING GAMMA RAY IMAGES OBTAINED IN APPLICATIONS OF NUCLEAR MEDICINE.
Inventors
- 👤 W Spicer
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-04 | 1981-10-04 | 1982-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-04 | 1985-10-04 | 1986-04-05 | $7700.00 | Window Closed / Lapsed |