California Institute of Technology

Qualcomm Incorporated

Qualcomm Mems Technologies, Inc.

The General Hospital Corporation

Xiquan Cui

Changhuei Yang

Xin Heng

Axel Scherer

Russell Wayne Gruhlke

Demetri Psaltis

Guillermo J Tearney

Evgeni Petrovich Gousev

Guoan Zheng

Lap Man Lee

Paul Eric Jacobs

Scott E Fraser

Hae-Jong Seo

John Michael Wyrwas

Jacek Maitan

Chung-Po Huang

Qiang Zhang

Muhammed I Sezan

This disclosure provides systems, methods and apparatus for touch and gesture recognition, using a field sequential color display. The display includes a processor, a lighting system, and an arrangement for spatial light modulation that includes an array of light modulators. Each light modulator is switchable between an open position that permits transmittance of light from the lighting system through a respective aperture and a shut position that blocks light transmission through the respective aperture. The processor switches the light modulators in accordance with a first modulation scheme to render an image and in accordance with a second modulation scheme to selectively pass object illuminating light through at least one of the respective apertures. A light sensor receives light resulting from interaction of the object illuminating with an object and outputs a signal to the processor. The processor recognizes, from the output of the light sensor, a characteristic of the object.

Integration of a light collection light-guide with a field sequential color display

Methods, systems, computer-readable media, and apparatuses for determining a location fix for optically-based active stylus input recognition technology are presented. The method includes, from an active light source capable of being handled by a user, emitting an electromagnetic wave signal in an initial direction toward a planar layer. The method also includes directing the electromagnetic wave signal in one or more lateral directions different from the initial direction, toward a plurality of detectors positioned at peripheral locations relative to the planar layer. The method further includes receiving the directed electromagnetic wave signal at the plurality of detectors. The method additionally includes, based on the directed electromagnetic wave signal received at the plurality of detectors, estimating a position of the user-controlled light source.

System and method for optically-based active stylus input recognition

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for sensing touch and/or gestures in the near-field area overlying a light-guiding layer within a device or other optical sensing system. In one aspect, modulated infrared light is emitted into the overlying area, and the light reflected by objects within the overlying area is redirected through the light-guiding layer to infrared sensors. In one aspect, a masking structure can be located between the light-guiding layer and the infrared sensors. In some aspects, probability mapping or backtracing can be used to estimate the locations of objects within the overlying area.

Near-field optical sensing system

A microscopy method and configuration provides the ability to achieve wide field view and high resolution simultaneously. A beam array generator generates an M&#xd7;N light beam array that illuminates a sample and an M&#xd7;N sensor array. The sensor array obtains a whole microscopy image of the sample based on the light beam array. Each light beam of the array corresponds to one unique pixel sensor in the sensor array. A scanning of all light beams of the light beam array covers a whole area of the sample.

Scanning illumination microscope

This disclosure relates to a channel waveguide, at least a portion of which is disposed within a viewing area of an interactive display, proximate to and substantially parallel to a user interface surface of the interactive display. A source of a first electromagnetic or acoustic signal is input to the channel waveguide. At least one detector is configured to receive, from the channel waveguide, a second signal corresponding to the first signal and to output a third signal indicative of a position of an object proximate to the channel waveguide.

Channel waveguide system for sensing touch and/or gesture

A surface wave assisted system having an aperture layer with a surface and an aperture, and a plurality of grooves around the aperture. The plurality of grooves is configured to generate an optical transfer function at the aperture by inducing a surface wave for interfering with transmission of light of a range of spatial frequency.

Surface wave assisted structures and systems

A method for noninvasive analysis of a retina includes exposing the retina to one or more first sets of at least three illumination light signals. The at least three illumination light signals each have a different wavelength. The method also includes optically collecting a reflected light signal for each of the at least three illumination light signals of the one or more first sets. Each of the reflected light signals is a portion of the respective illumination light signal reflected by the retina. The method further includes detecting the reflected light signals of the one or more first sets as a function of intensity. The method still further includes determining a first opsin density using the detected intensity of each of the reflected light signals of the one or more first sets.

Systems and methods for noninvasive analysis of retinal health and function

Embodiments of the present invention relate to a method for computing depth sectioning of an object using a quantitative differential interference contrast device having a wavefront sensor with one or more structured apertures, a light detector and a transparent layer between the structured apertures and the light detector. The method comprises receiving light, by the light detector, through the one or more structured apertures. The method also measures the amplitude of an image wavefront, and measures the phase gradient in two orthogonal directions of the image wavefront based on the light. The method can then reconstruct the image wavefront using the amplitude and phase gradient. The method can then propagate the reconstructed wavefront to a first plane intersecting an object at a first depth. In one embodiment, the method propagates the reconstructed wavefront to additional planes and generates a three-dimensional image based on the propagated wavefronts.

Quantitative differential interference contrast (DIC) devices for computed depth sectioning

Embodiments of the present invention relate to a wavefront sensor comprising a film and a photodetector. The film has one or more structured two dimensional apertures configured to convert a phase gradient of a wavefront into a measurable form. The photodetector is configured to receive the wavefront through the one or more 2D apertures and measure the phase gradient of the wavefront.

Wavefront imaging devices comprising a film with one or more structured two dimensional apertures and their applications in microscopy and photography

Embodiments of the present invention relate to a wavefront imaging sensor (WIS) comprising an aperture layer having an aperture, a light detector having a surface and a transparent layer between the aperture layer and the light detector. The light detector can receive a light projection at the surface from light passing through the aperture. The light detector can also separately measure amplitude and phase information of a wavefront at the aperture based on the received light projection. The transparent layer has a thickness designed to locate the surface of the light detector approximately at a self-focusing plane in a high Fresnel number regime to narrow the light projection.

Wavefront imaging sensor

A differential interference contrast (DIC) determination device and method utilizes an illumination source, a layer having a pair of two apertures that receive illumination from the illumination source, and a photodetector to receive Young's interference from the illumination passing through the pair of two apertures. In addition, a surface wave assisted optofluidic microscope and method utilize an illumination source, a fluid channel having a layer with at least one aperture as a surface, and a photodetector that receives a signal based on the illumination passing through the aperture. The layer is corrugated (e.g., via fabrication) and parameters of the corrugation optimize the signal received on the photodetector.

On-chip phase microscope/beam profiler based on differential interference contrast and/or surface plasmon assisted interference

Embodiments of the present invention relate to techniques for improving optofluidic microscope (OFM) devices. One technique that may be used employs surface tension at a hydrophobic surface to passively pump the fluid sample through the fluid channel. Another technique uses electrodes to adjust the position of objects in the fluid channel. Another technique computationally adjusts the focal plane of an image wavefront measured using differential interference contrast (DIC) based on Young's interference by back propagating the image wavefront from the detection focal plane to a different focal plane. These techniques can be employed separately or in combination to improve the capabilities of OFM devices.

Focal plane adjustment by back propagation in optofluidic microscope devices

Embodiments of the present invention relate to techniques for improving optofluidic microscope (OFM) devices. One technique which may be used eliminates the aperture layer covering the light detector layer. Other techniques retain the aperture layer, reversing the relative position of the light source and light detector such that light passes through the aperture layer before passing through the fluid channel to the light detector. Another technique adds an optical tweezer for controlling the movement of objects moving through the fluid channel. Another technique adds an optical fiber bundle to relay light from light transmissive regions to a remote light detector. Another technique adds two electrodes at ends of the fluid channel to generate an electrical field capable of moving objects through the fluid channel while suppressing rotation. These techniques can be employed separately or in combination to improve the capabilities of OFM devices.

Optofluidic microscope device with photosensor array

Embodiments of the present invention relate to a surface wave enabled darkfield aperture structure comprising an aperture layer, a aperture in the aperture layer and a plurality of grooves around the aperture. The aperture layer has a first and second surface. The plurality of grooves is in the first surface. A surface wave propagates along at least the first surface. The plurality of grooves is configured to generate a darkfield at the aperture by modifying the surface wave to cancel out direct transmission of a uniform incident light field received by the aperture.

Surface wave enabled darkfield aperture

A wavefront microscope or camera utilizes a wavefront sensor to measure the local intensity and phase gradient of the wavefront and output image maps based on the intensity and phase gradient. A wavefront sensor provides a metal film having patterned structured two dimensional (2D) apertures that convert a phase gradient of a wavefront into a measurable form onto a photodetector array. A computer is used to analyze the data by separating signals projected and recorded on the array from the different apertures, predict a center of each projection, and sum signals for each projection to display the intensity while determining a center position change/offset from the predicted center to display the phase gradient of the wavefront.

Growing community of inventors

Pasadena, CA, United States of America

Xiquan Cui