Aristide C Dogariu

US Patent:

6525823, Feb 25, 2003

Filed:

Oct 18, 2000

Appl. No.:

09/691300

Inventors:

Aristide Dogariu - Winter Springs FL
Gabriel Popescu - Orlando FL

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G01B 902

US Classification:

356479

Abstract:

An optical system for monitoring a colloidal suspension includes a chamber positioned to receive a sample of the suspension while the suspension is circulating in a mechanical system. An interferometer is positioned to generate interference patterns developed by a combination of a reference radiation signal with a sample radiation signal indicative of a characteristic in the suspension.

US Patent:

6559950, May 6, 2003

Filed:

Oct 18, 2000

Appl. No.:

09/690904

Inventors:

Aristide Dogariu - Winter Springs FL
Gabriel Popescu - Orlando FL

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G01B 902

US Classification:

356479

Abstract:

The specification describes a method for monitoring a characteristic of a mixture of particles suspended in a liquid medium by generating a first interference signal by combining first and second radiation beams after the first beam traverses a reference path and the second beam traverses a path extending into the mixture, allowing the particles in the mixture to partially settle, then generating a second interference signal by the same technique as used for the first. The second interference signal is then compared to the first interference signal to determine a change in, e. g. , the particle density.

US Patent:

6587206, Jul 1, 2003

Filed:

Oct 18, 2000

Appl. No.:

09/690941

Inventors:

Aristide Dogariu - Winter Springs FL
Gabriel Popescu - Orlando FL

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G01B 902

US Classification:

356479

Abstract:

In a method for characterizing particles in a colloidal suspension, during a period in which the particles undergo sedimentation, changes are measured in the intensity among interference patterns generated by combining first and second partially coherent radiation portions. Each radiation portion is generated from the same source. The first portion includes a component transmitted through a fraction of the suspension, and the second portion is transmitted through a reference path.

US Patent:

6590664, Jul 8, 2003

Filed:

Oct 18, 2000

Appl. No.:

09/691299

Inventors:

Aristide Dogariu - Winter Springs FL
Gabriel Popescu - Orlando FL

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G01B 902

US Classification:

356479, 356483

Abstract:

An interferometric system includes first, second and third optical fibers with first and second couplers. The first coupler is configured to receive radiation through the first fiber, provide a first radiation portion through the second fiber and provide a second radiation portion through the third fiber to the second coupler. The system also includes fourth and fifth optical fibers each configured to receive radiation from the second coupler and transmit radiation for receipt by the other.

US Patent:

6738144, May 18, 2004

Filed:

Dec 17, 1999

Appl. No.:

09/465586

Inventors:

Aristide Dogariu - Oviedo FL

Assignee:

University of Central Florida - Orlando FL

International Classification:

G01B 902

US Classification:

356479, 356335, 356497

Abstract:

The disclosure relates to measuring devices that are particularly suited for the purpose of in-situ characterization of particles present in fluid substances or in air using a low-coherence interferometer. Specifically, the characterization includes average size, size distribution, volumetric density, and composition. The low-coherence interferometer utilizes a split band of radiation to illuminate a sample probe and a reference probe then combines the reflected radiation from both probes to determine the photon pathlength distribution of the tested particulate or colloidal containing stream and from this information determine the size characteristics of said stream. The methodology is relevant to possible spatially distributed control of chemical processes such as emulsion polymerization to produce paints, coatings, synthetic rubbers, or crystallization processes in pharmaceuticals, food, and bulk chemicals industries. Another application relates to on-line control of particle size and volumetric density is in combustion for diagnostics. The invention can be used for the characterization of coal particles, dense sprays and solid propellants or any other system, which is too dense for conventional optical measurement techniques.

US Patent:

6807375, Oct 19, 2004

Filed:

Jan 9, 2001

Appl. No.:

09/757158

Inventors:

Aristide Dogariu - Winter Springs FL

Assignee:

University of Central Florida - Orlando FL

International Classification:

H04B 1000

US Classification:

398130, 398118

Abstract:

This disclosure relates to a laser communication system for transmitting intelligence by means of partially coherent optical energy. The system provides improved transmission of intelligence from a transmitter site through non-confined free space and receiving said intelligence at a receiver site remote from and physically separate from said transmitter by non-confined free space. The system has a optical source at the transmitter site for producing a beam of spatially-coherent monochromatic, aperture limited electromagnetic optical energy as well as a modulator for modulating said beam with intelligence-bearing information to develop wavefronts of mutually-aligned orientation which beam is thereafter modified to partial coherence and a receiver site for both detecting said information in said partially coherent beam and deriving said demodulated information. The partially coherent beam has an a of preferably from 0. 05 to 0. 5 whereby improved reception is realized from optical communication over free-space of limited distances.

US Patent:

6958816, Oct 25, 2005

Filed:

Sep 12, 2002

Appl. No.:

10/242221

Inventors:

Aristide Dogariu - Winter Springs FL, US
Gabriel Popescu - Brighton MA, US
Raj Rajagopalan - Gainesville FL, US

Assignee:

Research Foundation of the University of Central Florida - Orlando FL

International Classification:

G01B009/02

US Classification:

356479

Abstract:

Methods and systems for using dynamic light scattering, for investigating local rheological responses of complex fluids over a frequency range larger than that provided by standard instrumentation. A low-coherence radiation source is used with fiber optics to allow measurements of small volume spacing of up to approximately 1/10 of a picoliter. The methods and systems are based on dynamic light scattering, for investigating the local rheological response of a complex fluid over a frequency range larger than that provided by standard mechanical instrumentation. The low-coherence radiation used in a fiber optics configuration allows the measurements to be confined to a small volume around a tenth of a picoliter. The ability of the method to accurately measure both loss and storage moduli has been tested using both simple Newtonian liquids and viscoelastic, complex fluids. Monitoring liquid-gel transitions in polymer solutions has also been demonstrated.

US Patent:

7045169, May 16, 2006

Filed:

Sep 4, 2002

Appl. No.:

10/233578

Inventors:

Gary M. Freeman - Macon GA, US
Richard D. Carter - Macon GA, US
Aristide C. Dogariu - Winter Springs FL, US

Assignee:

J.M. Huber Corporation - Edison NJ

International Classification:

B05D 5/06
D21H 19/36
D21H 19/40
D21H 23/78

US Classification:

427180, 427201, 427445, 162135, 106632

Abstract:

Method of predicting optical properties and physical characteristics of coated paper or other sheet products for the purpose of formulating enhanced coating or sheet forming systems, and in particular to a method, which uses a diffusion approximation model derived from a radiative transfer theory employing various inputs of the properties and/or characteristics to predict coating or sheet system performance.