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US4100445A
Expired / Lapsed
US
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Image output screen comprising juxtaposed doped alkali-halide crystalline rods
Assignee: Varian Medical Systems Inc
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Filing: 1976-03-15
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Granted: 1978-07-11
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Expires: 1996-03-15
Abstract
Abstract An image intensifier tube having an output imaging screen comprising a scintillator layer of juxtaposed crystalline rods made of doped alkali-halide material, such as cesium iodide doped with sodium or thallium, for example.
Inventors
- 👤 Joseph R. Suffredini
- 👤 Robert A. Hagar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:11
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/61; C09K11/615; C09K11/616; C09K11/62; C09K11/626; C09K11/628; G; G21; G21K; G21K4/00; H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J2231/00; H01J2231/50; H01J2231/50057; H01J2231/50063
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
112 words
An image intensifier tube comprising: an envelope having spaced input and output faceplates; an input screen means disposed within the envelope and adjacent the input faceplate for receiving an incident radiational image and emitting an equivalent electron image; and an output imaging screen means aligned with said input screen means and disposed adjacent the output faceplate for receiving the electron image and producing a corresponding visible light image, the imaging screen means including a layer of juxtaposed crystalline rods disposed axially with respect to the output faceplate in tightly packed side-by-side relationship to a packing density greater than seventy percent of the theoretical maximum value, said crystalline rods being doped alkali-halide material.
Claim 2
Dependent Claim
112 words
An image intensifier tube comprising: an envelope having spaced input and output faceplates; an input screen means disposed within the envelope and adjacent the input faceplate for receiving an incident radiational image and emitting an equivalent electron image; and an output imaging screen means aligned with said input screen means and disposed adjacent the output faceplate for receiving the electron image and producing a corresponding visible light image, the imaging screen means including a layer of juxtaposed crystalline rods disposed axially with respect to the output faceplate in tightly packed side-by-side relationship to a packing density greater than seventy percent of the theoretical maximum value, said crystalline rods being doped alkali-halide material.
Claim 3
Dependent Claim
37 words
An image intensifier tube as set forth in claim 1 wherein the surface of the output faceplate adjacent the imaging screen means is a light diffusive surface and the layer of juxtaposed crystalline rods is supported thereon.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |