Kopin Corporation

Northeastern University

Other

The Foxboro Company

The Microoptical Corporation

Essilor International

Maxam, Inc.

Paul M Zavracky

Brenda D Dingle

Mark B Spitzer

John C Fan

Robert W McClelland

Duy-Phach Vu

Jeffrey Jay Jacobsen

Matthew M Zavracky

Jack P Salerno

Richard H Morrison, Jr

Nicol E McGruer

Noa More Rensing

Lisa P Allen

Jagdish Narayan

Paul Daniel Aquilino

John C C Fan

John R Martin

Barry L Karger

Stephen D Senturia

Everett O Olsen

Ngwe K Cheong

Renaud Moliton

Carmine Vittoria

Frantisek Foret

Gordon W Chitty

George G Adams

Yuriy M Dunayevskiy

Steven A Oliver

John G Panagou

Keith Warner

Gregory H Hunter

Kevin J O'Connos

Thomas P Ford

Qifeng Xue

E Nicol McGruer

Rick H Morrison

Richard H Morrision, Jr

Michael W Batty

An optical system for a head mounted display includes a light pipe having two parallel surfaces along which modes can travel by total internal reflection. An illumination element allows selection of modes so that the desired modes can be transmitted along the light pipe, either axially or by total internal reflection.

Optical system using total internal reflection images

An ophthalmic lens contains inserts () for projecting an image towards the user's eye. The lens is treated by coating the surface order to attenuate light reflected on the treated surface from the inside of the lens. Coating the surface of the lens attenuates the parasitic images formed by rays reflected on the coated surface and projected by the insert.

Ophthalmic lens having a projection insert

A binocular viewing system provides images from electronic display elements to the left and right eyes of a user transmitted via right eye and left eye display assemblies connected by a nose bridging element. The binocular viewing system includes an interpupillary distance adjustment mechanism to accommodate multiple users. Accommodation for vision correction and a focus mechanism may also be provided. Also, the binocular viewing system provides a virtual image at a distance less than infinity, in an arrangement that also accommodates a range of interpupillary distances. In other aspects, the binocular viewing system incorporates face curvature to more comfortably fit a user's head, and places the electronic display elements close to the user's eye, either in the line of sight, or within the nose bridging element.

Binocular viewing system

Apparatus and methods for protecting devices such as micro-switches ( ) and micro-relays from adverse effects of electrostatic discharge (ESD). A protection device is provided that includes a two terminal switch ( ) that can be actuated by an ESD event to protect an EDS-sensitive micro-switch or micro-relay from potential malfunction and/or damage. The two terminal switch is configured to close in less time than the micro-switch or micro-relay it is protecting, thereby disipating the energy associated with the ESD event without causing damage to the micro-relays which are provided with increased immunity to the adverse effects of ESD events. The micro-switch includes respective drain/gate terminal pairs at respective ends of the device. The micro-relay includes at least two drain terminals ( ) and a gate terminal ( ) at respective ends of the device. The micro-switch and micro-relay are configured to be less sensitive to ESD events by using the gate terminal ( ) at one end of the device to latch that end of the device down, thereby increasing the gate or drain voltage required to generate a threshold electric field to pull the other end of the device down.

Electrostatic discharge protection for eletrostatically actuated microrelays

A micro-electromechanical optical switch assembly is provided for an optical network. The switch assembly includes arrays of input and output optical fibers and optical components for selecting light paths that connect any selected pair of input and output fibers. The optical components include optical switching elements, such as torsionally supported micromechanical mirrors that are electrostatically actuated to rotate to direct the light beam along the desired light path. The mirrors are bulk micromachined into a semiconductor wafer, preserving their optical qualities, and formed into a chip mated to a cover. The package incorporates alignment elements to ensure correct position and orientation of the optical components in the package.

Micro-electromechanical optical switch assembly for optical data networks

A multi-layered structure is fabricated in which a microprocessor is configured in different layers and interconnected vertically through insulating layers which separate each circuit layer of the structure. Each circuit layer can be fabricated in a separate wafer or thin film material and then transferred onto the layered structure and interconnected.

Three dimensional processor using transferred thin film circuits

The present invention relates to methods of fabricating pixel electrodes ( ) for active matrix displays including the formation of arrays of transistor circuits in thin film silicon ( ) on an insulating substrate and transfer of this active matrix circuit onto an optically transmissive substrate ( ). An array of color filter elements can be formed prior to transfer of the active matrix circuit that are aligned between a light source for the display and the array of pixel electrodes to provide a color display.

Methods of fabricating active matrix pixel electrodes

A torsional micro-mechanical mirror system includes a mirror assembly rotatably supported by a torsional mirror support assembly for rotational movement over and within a cavity in a base. The cavity is sized sufficiently to allow unimpeded rotation of the mirror assembly. The mirror assembly includes a support structure for supporting a reflective layer. The support structure is coplanar with and formed from the same wafer as the base. The torsional mirror support assembly includes at least one torsion spring formed of an electroplated metal. An actuator assembly is operative to apply a driving force to torsionally drive the torsional mirror support assembly, whereby torsional motion of the torsional mirror support assembly causes rotational motion of the mirror assembly. In another embodiment, a magnetic actuator assembly is provided to drive the mirror assembly. Other actuator assemblies are operative to push on the mirror assembly or provide electrodes spaced across the gap between the mirror assembly and the base. A process for fabricating the torsional micro-mirror is provided. The torsional micro-mirror is useful in various applications such as in biaxial scanner or video display systems.

Magnetically actuated torsional micro-mechanical mirror system

A display panel is formed using essentially single crystal thin-film material that is transferred to substrates for display fabrication. The transfer includes the step of transferring the semiconductor regions onto a stretchable substrate. The resulting circuit panel can be incorporated into a display panel with a light emitting or liquid crystal material to provide the desired display.

Method of transferring semiconductors

The present invention relates to microfabricated spectrometers including methods of making and using same. Microspectrometers can be formed in a single chip in which detectors and light sources can be monolithically integrated. The microspectrometer can be integrated into a sensor system to measure the optical and physical properties of solids and fluids.

Light modulating device

Method of fabrication of a torsional micro-mechanical mirror system

A display panel is formed using a single crystal thin-film transistors that are transferred to substrates for display fabrication. Pixel arrays form light valves or switches that can be fabricated with control electronics in the thin-film material prior to transfer. The resulting circuit panel is then incorporated into a projection display system with a light emitting or liquid crystal material to provide the desired light valve.

Single crystal silicon arrayed devices with optical shield between transistor and substrate

A method of creating plastically deformed devices which have a three dimensional aspect. Micromechanical structures are created from a material which is plastically deformable and then a section of the structure is bent to an out-of-plane position and can be maintained there without being supported by other mechanical devices such as latches or hinges. The bending of the structures may be done mechanically, by electrostatic forces or by magnetic forces. The bending can also be done in a batch mode where a plurality of devices are bent at the same time as part of the same process. Fuses can be utilized to allow only a predetermined number of devices to be bent in batch mode. The fuses are later blown, thereby providing a plurality of devices which are relatively parallel to the substrate as well as a plurality of devices which are generally out-of-plane with respect to the substrate.

Method of forming plastically deformable microstructures

Flow, tactile and orientation sensors using deformable microelectrical mechanical sensors

Growing community of inventors

Norwood, MA, United States of America

Paul M Zavracky