Patent US3835246A successfully refreshed from Google Patents.
US3835246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television display system for electromagnetic beam apparatus
Assignee: Siemens AG
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Filing: 1973-01-18
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Granted: 1974-09-10
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Expires: 1993-01-18
Abstract
Abstract An electromagnetic particle beam device, such as an electron microscope, includes a fluorescent screen mounted in the focal plane of the beam for providing a direct image a television camera arranged behind a window in the flourescent screen separately picks up and enlarges the part of the image which falls in the area of the window to permit simultaneous viewing of an overall picture and an electronically enlarged section of the picture.
Inventors
- 👤 K Muller
- 👤 D Willasch
- 👤 G Dollmeier
- 👤 V Rindfleisch
- 👤 M Rauch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:34
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/22; H01J37/224
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
153 words
In apparatus of the type having a vacuum chamber and means for generating a beam of electromagnetic particles, for directing the beam at a specimen in the chamber, and for projecting the beam from the specimen, an improved image display system comprising: a first screen located within the chamber in the path of the projected beam, the screen including material responsive to the beam particles for producing an optical image of the specimen, the material being distributed throughout the area of the screen except for a window section which passes a portion of the projected beam through the screen; a television camera positioned behind the screen in the path of the passed portion of the projected beam for picking up the portion of the projected image that falls within the area of the window; and a television monitor connected to the television camera for displaying the image portion picked up by the camera.
Claim 2
Dependent Claim
153 words
In apparatus of the type having a vacuum chamber and means for generating a beam of electromagnetic particles, for directing the beam at a specimen in the chamber, and for projecting the beam from the specimen, an improved image display system comprising: a first screen located within the chamber in the path of the projected beam, the screen including material responsive to the beam particles for producing an optical image of the specimen, the material being distributed throughout the area of the screen except for a window section which passes a portion of the projected beam through the screen; a television camera positioned behind the screen in the path of the passed portion of the projected beam for picking up the portion of the projected image that falls within the area of the window; and a television monitor connected to the television camera for displaying the image portion picked up by the camera.
Claim 3
Dependent Claim
90 words
The apparatus of claim 1 further comprising: a first window located in one wall of the vacuum chamber to permit direct viewing of the first screen and a second window located in a wall of the vacuum chamber within the field of view through the first window, the television monitor being positioned outside the chamber with its viewing screen adjacent to the second window to permit simultaneous viewing of the overall picture on the first screen and the portion of the picture delineated by the window on the television monitor.
Claim 4
Dependent Claim
44 words
The apparatus of claim 1 wherein the first television camera includes an entrance aperture having a layer of material responsive to the beam particles for producing an optical image of the portion of the projected image that falls within the area of the window.
Claim 5
Dependent Claim
72 words
The apparatus of claim 3 wherein the area of the entrance aperture of the first television camera is larger than the area of the layer of material responsive to the beam particles for producing an optical image, and the display system further comprises a mirror positioned to reflect the oveRall image produced on the first screen toward the area of the entrance area that is not covered by the layer of material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |