Richard Todd Benson

US Patent:

6528318, Mar 4, 2003

Filed:

Mar 6, 2000

Appl. No.:

09/519320

Inventors:

Joseph A. Miragliotta - Ellicott City MD
Richard C. Benson - Highland MD
Robert Osiander - Ellicott City MD

Assignee:

The Johns Hopkins University - Baltimore MD

International Classification:

C09K 1100

US Classification:

436 56, 2524081, 422 55, 422119, 2504581

Abstract:

Sensors and/or taggants feature high optical gain materials which are disposed in a high scattering environment. These materials, when adequately excited, emit intense and spectrally narrow light that is dependent on the chemical environment in which high gain materials are dispersed. When two materials are placed in the same high scattering environment, the spectal emission properties of each emitter will depend on the chemical composition of the surrounding medium. The switching or transferring of energy from one emitter to the other when the chemical environment is changed in a specific manner is enabled and a shift in the spectral emissions can be detected and/or predicted.

US Patent:

20030109049, Jun 12, 2003

Filed:

Nov 25, 2002

Appl. No.:

10/303244

Inventors:

Joseph Miragliotta - Ellicott City MD, US
Richard Benson - Highland MD, US
Robert Osiander - Ellicott City MD, US

International Classification:

G01N021/64

US Classification:

436/056000, 422/082080, 436/172000

Abstract:

Sensors and/or taggants feature high optical gain materials which are disposed in a high scattering environment. These materials, when adequately excited, emit intense and spectrally narrow light that is dependent on the chemical environment in which high gain materials are dispersed. When two materials are placed in the same high scattering environment, the spectal emission properties of each emitter will depend on the chemical composition of the surrounding medium. The switching or transferring of energy from one emitter to the other when the chemical environment is changed in a specific manner is enabled and a shift in the spectral emissions can be detected and/or predicted.

US Patent:

45743665, Mar 4, 1986

Filed:

Feb 7, 1983

Appl. No.:

6/464771

Inventors:

Richard S. Potember - Baltimore MD
Theodore O. Poehler - Baltimore MD
Richard C. Benson - Columbia MD

Assignee:

The Johns Hopkins University - Baltimore MD

International Classification:

G11C 1100

US Classification:

365153

Abstract:

Optical devices using an organic charge transfer salt as the switching and storage media are disclosed. Generally, a light beam of a given intensity directed to a film of certain organic charge transfer salts causes the illuminated area to change from a first to a second state. This electrochemical process is reversible with heat energy transforming the illuminated area back into the first state. The first and second states have identifiably different optical and electrical properties. The organic charge transfer salt is used to fabricate an erasable or permanent optical memory and a threshold on bistable optoelectronic switch.

US Patent:

47317566, Mar 15, 1988

Filed:

Aug 29, 1985

Appl. No.:

6/770443

Inventors:

Richard S. Potember - Baltimore MD
Theodore O. Poehler - Baltimore MD
Richard C. Benson - Columbia MD

Assignee:

The Johns Hopkins University - Baltimore MD

International Classification:

G11C 1100

US Classification:

365153

Abstract:

Optical devices using an organic charge transfer salt as the switching and storage media are disclosed. Generally, a light beam of a given intensity directed to a film of certain organic charge transfer salts causes the illuminated area to change from a first to a second state. This electrochemical process is reversible with heat energy transforming the illuminated area back into the first state. The first and second states have identifiably different optical and electrical properties. The organic charge transfer salt is used to fabricate an erasable or permanent optical memory and a threshold on bistable optoelectronic switch.