Research Triangle Institute

Halliburton Energy Services, Inc.

Michael Lamvik

James Lynn Davis

Vijay Gupta

Samuel Jason Lewis

Anthony M Badalamenti

Andrew Dummer

Vikram Rao

Paul G Hoertz

David F Myers

Lawrence R Roberts

Karmann Cressman Mills

Michele Ostraat

Gary P Funkhouser

Gary Elder McGuire

David Dausch

Howard Jerome Walls

Sonia Grego

Lynn Margaret Soby

Kristin Hedgepath Gilchrist

Kimberly A Guzan

James F Bittle

Laura Haines

John S Lewis, Iii

Brent Thomas Ward

Andrew K Dummer

A lighting device () includes a housing (), a light converter (), one or more light sources (), and one or more optical waveguides (). The housing includes a light exit () for outputting a combination of primary light () and secondary light (). The light source emits a primary light beam of a primary wavelength. The optical waveguide includes an input end () optically coupled to the light source, and an output end () facing a housing interior () and positioned at an angle to an axial direction through the housing interior. The optical waveguide directs the primary light beam from the light source, through the housing interior and toward a luminescent material of the light converter. The luminescent material emits secondary light of one or more wavelengths different from the primary wavelength in response to excitation by the primary light beam. The light source may be mounted outside the housing interior so as not to obstruct light propagation.

Lighting devices utilizing optical waveguides and remote light converters, and related methods

Sealant compositions comprising: a wellbore treatment fluid; a set modifier; and, a polymeric component that inhibits release of the set modifier; wherein exposure to ionizing radiation causes degradation of the polymeric component resulting in release of the set modifier and an increase in the mechanical strength of the sealant composition.

Radiation-induced triggering for set-on-command sealant compositions

A fiber-based reflective lighting device and a housed lighting device. The fiber-based reflective lighting device which includes a source configured to generate a primary light, and a substrate having a nanocomposite mat of reflective fibers having a diameter less than 1,000 nm which diffusively reflects light upon illumination with at least the primary light. The nanocomposite mat includes a reflectance-enhancing coating conformally disposed around an outer surface of the fibers, having a refractive index different from the reflective fibers, and which increases a reflectance of the substrate in the visible spectrum. The lighting device includes a light exit configured to emanate the reflected light. The housed lighting device includes a housing, a source configured to generate primary light and direct the primary light into the housing, the reflective nanocomposite mat of reflective fibers, and a light exit in the housing configured to emanate the reflected light from the housing.

Reflective nanofiber lighting devices

A fiber-based reflective lighting device and a lighting device. The fiber-based reflective lighting device includes a source configured to generate a primary light, a mat of reflective fibers which diffusely reflects light upon illumination with at least the primary light, and a light exit configured to emanate the reflected light. The lighting device includes a housing, a source configured to generate primary light and direct the primary light into the housing, a reflective mat of fibers disposed inside the housing at a position to reflect the primary light, and a light exit in the housing configured to emanate the reflected light from the housing.

A stimulated lighting device for stimulatable light emission including a luminescent sheet including light stimulatable particles which emit secondary light upon receiving primary light. The lighting device includes a source configured to generate and direct the primary light obliquely onto the luminescent sheet, at least one reflector configured to reflect at least a part of the primary light and a part of the secondary light onto the luminescent sheet and configured to reflect at least a part of scattered primary light and a part of the secondary light from the luminescent sheet toward the light exit, and a light exit configured to emanate light as a combination of the primary light and the secondary light.

Stimulated lighting devices

The present invention relates to an optical scanning apparatus and an optical scanning system The optical system includes an optical engine connected to an optical scanning probe The optical scanning probe images a sample at different lateral positions of the sample The optical scanning probe includes a housing having a longitudinal axis extending in a direction towards a sample to be scanned, a first base having a first moveable mirror supported thereon by a first cantilever connecting the first moveable mirror to the first base, a second base having a second moveable mirror supported thereon by a second cantilever connecting the second moveable mirror to the second base, and a support attaching the first and second bases so that the first moveable mirror and the second moveable mirror are disposed along the longitudinal axis apart from each other.

Cantilever-based MEMS optical scanning apparatus, system and method

The present invention includes methods and compositions relating to the setting of fluids or slurries in a wellbore. In one embodiment, a method of isolating a portion a wellbore includes preparing a sealant composition having a fluid component, a polymeric additive constituent, and a set modifier component. The sealant composition is placed into a wellbore and subjected to ionizing radiation. The ionizing radiation can cause bonding between polymeric additive constituents and create a polymer matrix within the sealant composition that increases the mechanical strength of the sealant composition. The ionizing radiation also alters the set modifier component, triggering the thickening of the sealant composition.

Radiation-induced thickening and radiation-induced triggering for set-on-command sealant compositions and methods of use

The present invention relates to methods useful for isolating a portion of a wellbore. In one embodiment, a method includes preparing a sealant composition containing a set modifier component. The sealant composition is placed into the wellbore and is subjected to ionizing radiation that alters the set modifier component, triggering the thickening of the sealant composition.

Radiation-induced triggering for set-on-command sealant compositions and methods of use

This invention provides a continuous display with non-uniform pixel density, forming a foveated display. A single, continuous display has a higher pixel density at the center of the display than at the periphery of the display. Where two continuous displays are used in accordance with the present invention, the central forward gaze of the viewer's image will be displayed in high resolution while the leftmost portion of the left eye display will be in low resolution and the rightmost portion of the right eye display will be in low resolution. The pixel resolution of the visual display may correspond to the visual acuity of the human eye. A foveated image display system using a continuous display with non-uniform pixel density increases the field of view while reducing the image bandwidth. A foveated image display system may be hardware-based by employing anamorphic lenses or sensors rather than relying upon image interpolation to modify the resolution of the resultant image data communicated to the continuous display with non-uniform pixel density.

Growing community of inventors

Durham, NC, United States of America

Michael Lamvik