Johns Hopkins University

Providence Health & Services - Oregon

Providence Health System

Donald D Duncan

Jerry A Krill

Joseph Cipriano

David W Blodgett

Raymond M Sova

Joe Frank

Sean J Kirkpatrick

Craig R Moore

Kevin C Baldwin

Philip J McNally

Joseph Frank

Charles H Lange

A communications system for wireless transceiving of information, comprising at least one multiple optical beam scanning array transceiver located in a satellite for wirelessly transceiving the information; and at least two terminals at diverse locations capable of wirelessly transceiving the information between the terminals and the satellite, and an apparatus for determining atmospheric conditions for use in adjusting the multiple beam scanning array transceiver parameters.

Mobile communications via an optical signal during adverse atmospheric conditions

A communications system for wireless transceiving of information, comprising an optical array subsystem for transceiving optical signals and a millimeter wave subsystem for transceiving millimeter wave signals, and a beam steering controller for controlling the direction of the optical and millimeter wave signals. The communication system may be on a flying platform, such as a satellite and may communicate with multiple remote terminals.

Mobile communications system

A system and method for providing real-time imaging for use in wide area space based surveillance utilizing an Optical Tera-bps Satellite (OPTSAT) network, including a plurality of OPTSATs, wherein an object is imaged with at least one surveillance aperture operatively linked to at least one of the plurality of OPTSATs is disclosed herein. The optical image data obtained the at least one surveillance aperture is processed in a one image processor, and displayed in a terminal capable of wirelessly transceiving information with the plurality of OPTSATs.

System and method for real-time image control and processing for use in wide area space based surveillance

A means of assessing the internal structure of teeth based upon use of high frequency, highly localized ultrasound (acoustic waves) generated by a short laser pulse is presented. In contrast to traditional contact transducer methods, laser-generated ultrasound is non-contact and non-destructive in nature and requires no special tooth surface preparation. Optical interferometric detection of ultrasound provides a complementary non-destructive, non-contact means for obtaining data with a very small detection footprint. The combination of laser-generated ultrasound and optical interferometric detection allows for in-vivo diagnostics of tooth health that is sensitive to the enamel/dentin, dentin/pulp, and dentin/cementum interfaces as well as a region of dead tracts in the dentin within a tooth.

Assessment of tooth structure using laser based ultrasonics

Disclosed is a system for distributing information and photonic energy into at least one room of a building, comprising a lighting generator for generating visible light energy, an infrared (IR) heat generator for generating IR heat energy, and an optical fiber subsystem for transceiving at least one of the visible light energy and the IR heat energy into the at least one room, wherein the optical fiber subsystem can carry optical information signals throughout the optical fiber subsystem and radiate the optical information signals as optical wireless signals into the at least one room and receive optical wireless signals from the at least one room.

System for distributing information and energy using fiber optic and optical wireless networks

Methods for measuring strains in biological and other samples include illuminating a specimen with substantially collimated laser flux. An electro-acoustic transducer is activated to generate acoustic waves in the specimen, including a surface wave component such as a Rayleigh wave. A series of laser speckle patterns produced by a laser flux scattered or reflected by the specimen is recorded and speckle pattern shifts are calculated based on the recorded speckle patterns. Phase shifts produced by acoustic wave propagation in the specimen are used to identify specimen regions associated with irregularities such as inclusions, cracks, or tissue abnormalities. In some examples, specimens are stretched or otherwise stressed by one or more light fluxes, and specimen elongation is estimated based on a series of associated speckle patterns.

Methods and apparatus for material evaluation using laser speckle

Methods for measuring strains in circuit substrates such as circuit boards and semiconductor wafers include illuminating a specimen with a substantially collimated laser flux. A temperature change is produced in the specimen and a series of laser speckle patterns produced by a laser flux scattered or reflected by the specimen is recorded. Localized strains are detected based on speckle pattern shifts that are calculated using the recorded speckle patterns. Stains can be recorded as a function of temperature or rate of change of temperature, and strains at one or more circuit substrate locations can be detected.

Methods and apparatus for evaluating mechanical and thermal strains in electronic materials, semiconductor materials, and other structures

Vanadium dioxide (VO.sub.2) based infrared spatial light modulators (SLM) in four embodiments are disclosed:

Growing community of inventors

Silver Spring, MD, United States of America

Donald D Duncan