Patent US4739399A successfully refreshed from Google Patents.
US4739399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
TV system for transmission electron microscopes
Assignee: GP ACQUISITION Corp
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Filing: 1987-08-06
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Granted: 1988-04-19
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Expires: 2007-08-06
Abstract
Abstract A device comprising a television camera mounted inside the projection chamber of a transmission electron microscope with the imaging surface perpendicular to the optical axis of the microscope. The electron image is converted to a light image by high efficiency YAG transmission scintillator and transferred by a low loss fiber optic plate to a CCD imaging device. The camera is moved by a pneumatic piston between the operating position where it intercepts the electron beam and a position where the electron beam can pass unobstructed to the main microscope viewing screen.
Inventors
- 👤 Peter R. Swann
- 👤 Bernd Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:00
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/22; H01J37/224
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
A device to detect and display electron images generated by a transmission electron microscope comprising an hermetically sealed television camera with imaging surface intercepting and perpendicular to the optic axis of said transmission electron microscope and a mechanism to move said camera into and away from the optic axis within the vacuum of said electron microscope.
Claim 2
Independent Claim
56 words
A device to detect and display electron images generated by a transmission electron microscope comprising an hermetically sealed television camera with imaging surface intercepting and perpendicular to the optic axis of said transmission electron microscope and a mechanism to move said camera into and away from the optic axis within the vacuum of said electron microscope.
Claim 3
Dependent Claim
41 words
A deivce as claimed in claim 1 where the electron image is converted to a light image by a single crystal yttrium aluminum garnet transmission scintillator and is transferred to the imaging surface of the camera by a fiber optic plate.
Claim 4
Dependent Claim
40 words
A device as claimed in claim 1 where the electron image is converted to a light image by a single crystal yttrium aluminum garnet transmission scintillator and is transferred to the imaging surface of the camera by a lens assembly.
Claim 5
Dependent Claim
19 words
A device as claimed in claim 1 where the television imaging head is a semiconductor charge coupled device array.
Claim 6
Dependent Claim
19 words
A device as claimed in claim 1 where the mechanism moving the television imagng head is a pneumatic piston.
Claim 7
Dependent Claim
39 words
A device as claimed in claim 1 where the mechanism moving the television imaging head is a pneumatic piston which automatically withdraws the television imaging head from the electron beam when power is removed from the TV control circuits.
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) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |