Stevens Institute of Technology

Rainer Martini

Igor S Alexandrov

Vikki Hazelwood

Patrick E White

Megan Calderia

Katherine Freed

Christopher Search

Christopher Sorrentino

Rachel Ostroff

Esther Eubanks

John Robert Emmet Toland

John J Keating, Iii

A microfabricated optical gyroscope that utilizes a linear array of micron scale optical ring resonators closely spaced to allow evanescent coupling of electromagnetic fields in adjacent resonators. Within each resonator, the optical Sagnac effect produces a phase difference between clockwise and counterclockwise propagating light that is proportional to the inertial rotation rate perpendicular to the plane of the resonator. The disclosure enhances the overall sensitivity to rotations by varying the strengths of the evanescent coupling between resonators and/or the circumferences of the resonators. The size and coupling strengths control the optical interference between resonators. By using periodically alternating coupling strengths and/or linearly chirped resonator circumferences, the gyroscope transmission has extremely narrow transmission resonances with slopes, corresponding to the responsivity to inertial rotations, that are large enough to yield shot noise limited sensitivities sufficient for inertial navigation in a device size less the 1 mmin size.

Optical gyroscope

A three dimensional imaging system is disclosed which includes a three dimensional display (), three-dimensional calibration equipment (), and one or more two-dimensional () or three dimensional () image scanners. The three-dimensional display () uses optical pulses (-) and a non linear optical mixer () to display a three-dimensional image (). The three-dimensional image () is generated in voxels of the display volume () as the optical mixer () sweeps the display volume (). The three-dimensional calibration equipment () uses a hologram projected proximal to a desired object () to calibrate optical imaging devices (-) and to simplify the combination of the images from one or more optical imaging devices (-) into three-dimensional information. The three-dimensional image scanner () employs optical pulses () and a non-linear optical mixer () to acquire three-dimensional images of a desired object (). The three-dimensional image scanner () captures both the shape and color of a desired object ().

Three-dimensional imaging system using optical pulses, non-linear optical mixers and holographic calibration

An apparatus for detecting images in a first selected bandwidth includes a probe light source to generate a probe beam in a second selected bandwidth, an optical path including input imaging optics to capture an image in the first selected bandwidth and form an image beam and a beam combiner to optically combine the probe beam with the image beam to form a combined beam, and an optical readout quantum well device in the optical path of the combined beam, which simultaneously passes in an optical readout beam an intensity level of at least one wavelength within the probe beam in the second selected bandwidth in proportion to an intensity level of at least one wavelength within the image beam in the first selected bandwidth; and a detector sensitive to light in the second selected bandwidth and not sensitive to light in the first selected bandwidth.

Infrared wavelength imaging applications based on quantum well devices

In a method of electrical impedance tomography (EIT), a mediating fluid provides electrical contact between the electrodes of an EIT device and the skin of a body part to be examined. The height of the fluid is raised or lowered between impedance measurements, enabling tomographic images of the tissue under examination to be resolved mathematically for subsequent viewing. Tomographic planes are isolated by calculating differences between Cartesian models generated from impedance values measured at the plane of interest and at an adjacent plane.

Three-dimensional impedance imaging device

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Hoboken, NJ, United States of America

Rainer Martini