US3575629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple condensing lens array for concentrating energy on a plurality of electron beam sources of a photocathode
Assignee: Westinghouse Electric Corp
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Filing: 1968-12-18
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Granted: 1971-04-20
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Expires: 1988-12-18
Abstract
Abstract The invention is an array of condensing lense for use in image tube pattern fabricating applications to provide selective and intensive illuminations of individual electron emitting sources of a multiple electron beam photocathode source.
Inventors
- 👤 Terence W O'keeffe
- 👤 Charles H Church
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:47
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
97 words
In an apparatus for generating a plurality of substantially identical electron beams comprising, a multiple electron beam photocathode source, said photocathode source comprising a plurality of substantially identical, individual electron emitting sources, a soUrce of radiation energy for exciting said electron emitting sources, and a condensing lens array disposed between said radiation source, and said multiple electron beam photocathode, said condensing lens array including a plurality of individual lenses, each of said lenses being operatively associated with one of said electron emitting sources to effectively concentrate energy from said radiation source onto the respective electron emitting sources.
Claim 2
Dependent Claim
97 words
In an apparatus for generating a plurality of substantially identical electron beams comprising, a multiple electron beam photocathode source, said photocathode source comprising a plurality of substantially identical, individual electron emitting sources, a soUrce of radiation energy for exciting said electron emitting sources, and a condensing lens array disposed between said radiation source, and said multiple electron beam photocathode, said condensing lens array including a plurality of individual lenses, each of said lenses being operatively associated with one of said electron emitting sources to effectively concentrate energy from said radiation source onto the respective electron emitting sources.
Claim 3
Dependent Claim
21 words
A device as claimed in claim 1, wherein said multiple element lens array is comprised of a plurality of zone plates.
Claim 4
Dependent Claim
16 words
A device as claimed in claim 2, wherein said zone plates are half wave zone plates.
Claim 5
Independent Claim
126 words
A system for exposing high resolution patterns on an electron sensitive anode comprising: a multiple electron beam photocathode source, said photocathode source comprising a plurality of substantially identical electron emitting sources, a radiation source for illuminating said photocathode, said photocathode illumination producing electron emission from said electron emitting sources, electron beam control means for directing said electron beams to said anode for exposing a plurality of substantially identical patterns thereon, and a condensing lens array disposed between said radiation source and said multiple electron beam photocathode, said condensing lens array including a plurality of individual lenses, each of said lenses operatively associated with one of said electron emitting sources to effectively concentrate illumination from said radiation source onto the respective electron emitting sources of said photocathode.
Claim 6
Independent Claim
126 words
A system for exposing high resolution patterns on an electron sensitive anode comprising: a multiple electron beam photocathode source, said photocathode source comprising a plurality of substantially identical electron emitting sources, a radiation source for illuminating said photocathode, said photocathode illumination producing electron emission from said electron emitting sources, electron beam control means for directing said electron beams to said anode for exposing a plurality of substantially identical patterns thereon, and a condensing lens array disposed between said radiation source and said multiple electron beam photocathode, said condensing lens array including a plurality of individual lenses, each of said lenses operatively associated with one of said electron emitting sources to effectively concentrate illumination from said radiation source onto the respective electron emitting sources of said photocathode.
Claim 7
Dependent Claim
20 words
A system as claimed in claim 4, wherein said multiple lens array is comprised of a plurality of zone plates.
Claim 8
Dependent Claim
16 words
A system as claimed in claim 5, wherein said zone plates are half wave zone plates.
Claim 9
Dependent Claim
26 words
In an apparatus as claimed in claim 1 wherein each of said individual electron emitting sources is comprised of an array of discrete electron emitting sources.
Claim 10
Dependent Claim
31 words
In an apparatus as claimed in claim 1 wherein each of said individual electron emitting sources is comprised of a circuit pattern in the form of a single electron emitting source.
References Cited (Backward Citations)
US3236707A
Cited
US3405614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |