Back to results
US 2003/0222579 A1Published application
Photocathode
AssigneeBurle Technologies, Inc.
InventorsYoussef M. Habib, John G. Bryan, Charles W. Stoll, John W. Steinbeck
Life of this patent
Estimating the term…
Abstract
An electron-emitting photocathode includes a base and a large number of projecting elements such as microscopic wires projecting from a surface of the base. The photocathode has high quantum efficiency, and hence can be used as the emitting element in a sensitive phototube.
Claims26
A photocathode comprising:
- (a) a base having horizontal directions;
- (b) a set of elements projecting from the base in a vertical direction transverse to said horizontal directions, said elements being adapted to emit electrons upon absorption of light by said elements.
A phototube comprising:
- (b) an anode structure;
- (a) a photocathode for receiving light, said photocathode having a base and a plurality of elements that project from a surface of said base toward said anode structure, said photocathode being capable of emitting electrons upon receipt of said light;
- (c) an enclosure maintaining said photocathode and said anode in a vacuum.
A method of making a photocathode comprising:
- (a) providing a template having a plurality of pores, each of said pores having an open end;
- (b) depositing material in said pores to form elements;
- (c) providing a base for electrically connecting said elements;
- and
- (d) removing at least a portion of said template to expose the elements.
2 more elements
Dependencies are inferred from the claim text.