Patent US4523320A successfully refreshed from Google Patents.
US4523320A
Expired / Lapsed
US
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Uniform-field electrode
Assignee: Northrop Grumman Corp
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Filing: 1983-01-14
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Granted: 1985-06-11
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Expires: 2003-01-14
Abstract
Abstract A pair of electrodes for producing a very uniform electric field within a predetermined region. The electrodes have a special theoretically-derived shape which inherently terminates the electrodes just outside the predetermined region, thereby overcoming any need to empirically truncate the design to achieve compactness and low inductance. In contrast to conventional truncated designs, the performance of electrodes shaped according to the present invention is analytically predictable, thereby minimizing the need for time-consuming experimentation.
Inventors
- 👤 Eddy A. Stappaerts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:57
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/038; H01S3/0385
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
Apparatus for producing a uniform electric field, the apparatus being defined relative to a 3-dimensional Cartesian coordinate system having X, Y and Z principal axes, comprising: two elongated electrodes disposed on opposite sides of the X-Z plane; and means for applying a voltage between the two electrodes; each electrode having a surface facing the other electrode which is symmetrical about the Y-Z plane, which has its longitudinal dimension parallel to the Z-axis, and which has a transverse cross-section whose contour satisfies the following equation: dy/dx=-E.sub.x /E.sub.y wherein E x and E y are the following fuctions of x and y: ##EQU2## and wherein E o is a scale factor having any desired value either greater than or less than zero and a and b are parameters whose values are uniquely determined as follows by a parameter p having a value greater than 0.18 and less than or equal to one: ##EQU3##
Claim 2
Dependent Claim
151 words
Apparatus for producing a uniform electric field, the apparatus being defined relative to a 3-dimensional Cartesian coordinate system having X, Y and Z principal axes, comprising: two elongated electrodes disposed on opposite sides of the X-Z plane; and means for applying a voltage between the two electrodes; each electrode having a surface facing the other electrode which is symmetrical about the Y-Z plane, which has its longitudinal dimension parallel to the Z-axis, and which has a transverse cross-section whose contour satisfies the following equation: dy/dx=-E.sub.x /E.sub.y wherein E x and E y are the following fuctions of x and y: ##EQU2## and wherein E o is a scale factor having any desired value either greater than or less than zero and a and b are parameters whose values are uniquely determined as follows by a parameter p having a value greater than 0.18 and less than or equal to one: ##EQU3##
Claim 3
Dependent Claim
167 words
A laser excited by an electric field between two electrodes, the laser being defined relative to a 3-dimensional Cartesian coordinate system having x, y and z principal axes, comprising: an elongated laser gain medium having a longitudinal axis coincident with the z-axis; two elongated electrodes disposed on opposite sides of the X-Z plane; and means for applying a voltage between the two electrodes; each electrode having a surface facing the other electrode which is symmetrical about the Y-Z plane, which has its longitudinal dimension parallel to the Z-axis, and which has a transverse cross-section whose contour satisfies the following equation: dy/dx=-E.sub.x /E.sub.y wherein E x and E y are the following fuctions of x and y: ##EQU4## and wherein E o is a scale factor having any desired value either greater than or less than zero and a and b are parameters whose values are uniquely determined as follows by a parameter p having a value greater than 0.18 and less than or equal to one: ##EQU5##
Claim 4
Dependent Claim
167 words
A laser excited by an electric field between two electrodes, the laser being defined relative to a 3-dimensional Cartesian coordinate system having x, y and z principal axes, comprising: an elongated laser gain medium having a longitudinal axis coincident with the z-axis; two elongated electrodes disposed on opposite sides of the X-Z plane; and means for applying a voltage between the two electrodes; each electrode having a surface facing the other electrode which is symmetrical about the Y-Z plane, which has its longitudinal dimension parallel to the Z-axis, and which has a transverse cross-section whose contour satisfies the following equation: dy/dx=-E.sub.x /E.sub.y wherein E x and E y are the following fuctions of x and y: ##EQU4## and wherein E o is a scale factor having any desired value either greater than or less than zero and a and b are parameters whose values are uniquely determined as follows by a parameter p having a value greater than 0.18 and less than or equal to one: ##EQU5##
References Cited (Backward Citations)
US4210877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |