US3576583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct record image discharge tube
Assignee: Panasonic Holdings Corp
•
Filing: 1967-10-24
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Granted: 1971-04-27
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Expires: 1987-10-24
Abstract
Abstract A device for directly recording an optical image on a recording medium, first by converting the optical image to an electron beam image, then directly recording the electron beam image on a recording medium sensitive to electron beams.
Inventors
- 👤 Yoshihiro Uno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:19
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/02; H01J31/06; H01J31/065
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
183 words
A direct record image discharge tube comprising an evacuated envelope having a faceplate formed at one end thereof, a photoelectric element positioned within said envelope close to the faceplate thereof, a lens system for permitting an image of external objects to be projected upon said photoelectric element, an electron beam pervious window positioned at the end of the envelope opposite to said faceplate, said electron beam pervious window comprising an electron beam pervious film which seals the envelope in a gastight manner and a support member having a plurality of fine apertures formed over its entire surface thereof, said electron beam pervious film being mounted on the vacuum side of said support member, a recording medium placed outside of said evacuated tube in opposed relationship to said electron beam pervious window, means positioned within said envelope for accelerating electrons released from said photoelectric element towards the electron beam pervious window so as to penetrate therethrough and means positioned outside of said envelope and extending around the recording medium for focusing said electrons so as to form an electron image on said recording medium.
Claim 2
Dependent Claim
183 words
A direct record image discharge tube comprising an evacuated envelope having a faceplate formed at one end thereof, a photoelectric element positioned within said envelope close to the faceplate thereof, a lens system for permitting an image of external objects to be projected upon said photoelectric element, an electron beam pervious window positioned at the end of the envelope opposite to said faceplate, said electron beam pervious window comprising an electron beam pervious film which seals the envelope in a gastight manner and a support member having a plurality of fine apertures formed over its entire surface thereof, said electron beam pervious film being mounted on the vacuum side of said support member, a recording medium placed outside of said evacuated tube in opposed relationship to said electron beam pervious window, means positioned within said envelope for accelerating electrons released from said photoelectric element towards the electron beam pervious window so as to penetrate therethrough and means positioned outside of said envelope and extending around the recording medium for focusing said electrons so as to form an electron image on said recording medium.
Claim 3
Dependent Claim
21 words
A direct record image discharge tube as claimed in claim 1, wherein said electron accelerating means comprises a resistive helical electrode.
Claim 4
Dependent Claim
20 words
A direct record image discharge tube as claimed in claim 1, wherein said electron accelerating means comprises a divided-type electrode.
Claim 5
Dependent Claim
20 words
A direct record image discharge tube as claimed in claim 1, wherein said electron focusing means comprises a field coil.
Claim 6
Dependent Claim
20 words
A direct record image discharge tube as claimed in claim 1, wherein said electron focusing means comprises a field magnet.
Claim 7
Dependent Claim
32 words
A direct record image discharge tube as claimed in claim 1 further comprising a penetration-type secondary electron emitting element positioned within said envelope between said photoelectric element and electron beam pervious window.
Claim 8
Dependent Claim
31 words
A direct record image discharge tube as claimed in claim 6, wherein said penetration-type secondary electron emitting element comprises an aluminum film, an aluminum oxide film and porous potassium chloride layer.
Claim 9
Dependent Claim
19 words
A direct record image discharge tube as claimed in claim 1 further comprising means to cool said photoelectric element.
Claim 10
Dependent Claim
35 words
A direct record image discharge tube as claimed in claim 8, wherein said cooling means comprises a heat conductive support which supports said photoelectric element and a container for coolant such as a liquid nitrogen.
Claim 11
Dependent Claim
20 words
A direct record image discharge tube as claimed in claim 1, wherein said electron pervious film is composed of aluminum.
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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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |