Gordon Wetzstein

US Patent:

20140063077, Mar 6, 2014

Filed:

Jan 8, 2013

Appl. No.:

13/736769

Inventors:

Gordon Wetzstein - Cambridge MA, US
Douglas Lanman - Somerville MA, US
Matthew Hirsch - Somerville MA, US
Ramesh Raskar - Cambridge MA, US

Assignee:

MASSACHUSETTS INSTITUTE OF TECHNOLOGY - Cambridge MA

International Classification:

G09G 3/34

US Classification:

345690, 345102

Abstract:

In exemplary implementations of this invention, an automultiscopic display device includes (1) one or more spatially addressable, light attenuating layers, and (2) a controller which is configured to perform calculations to control the device. In these calculations, tensors provide sparse, memory-efficient representations of a light field. The calculations include using weighted nonnegative tensor factorization (NTF) to solve an optimization problem. The NTF calculations can be sufficiently efficient to achieve interactive refresh rates. Either a directional backlight or a uniform backlight may be used. For example, the device may have (1) a high resolution LCD in front, and (2) a low resolution directional backlight. Or, for example, the device may have a uniform backlight and three or more LCD panels. In these examples, all of the LCDs and the directional backlight (if applicable) may be time-multiplexed.

US Patent:

20130176704, Jul 11, 2013

Filed:

Nov 29, 2012

Appl. No.:

13/689631

Inventors:

Douglas Lanman - Somerville MA, US
Gordon Wetzstein - Cambridge MA, US
Matthew Hirsch - Somerville MA, US
Wolfgang Heidrich - Vancouver, CA
Ramesh Raskar - Cambridge MA, US

International Classification:

G02B 27/22
F21V 9/14

US Classification:

362 19

Abstract:

In exemplary implementations of this invention, a flat screen device displays a 3D scene. The 3D display may be viewed by a person who is not wearing any special glasses. The flat screen device displays dynamically changing 3D imagery, with a refresh rate so fast that the device may be used for 3D movies or for interactive, 3D display. The flat screen device comprises a stack of LCD layers with two crossed polarization filters, one filter at each end of the stack. One or more processors control the voltage at each pixel of each LCD layer, in order to control the polarization state rotation induced in light at that pixel. The processor employs an algorithm that models each LCD layer as a spatially-controllable polarization rotator, rather than a conventional spatial light modulator that directly attenuates light. Color display is achieved using field sequential color illumination with monochromatic LCDs.

US Patent:

20220236796, Jul 28, 2022

Filed:

Jan 20, 2022

Appl. No.:

17/580568

Inventors:

- Palo Alto CA, US
Kevin Boyle - San Francisco CA, US
Nitish Padmanaban - Menlo Park CA, US
Gordon Wetzstein - Palo Alto CA, US

International Classification:

G06F 3/01
G02B 27/01
G09G 3/00
G06F 3/16

Abstract:

Embodiments are related to a plurality of gaze sensors embedded into a frame of a headset for detection of a gaze vector of a user wearing the headset and user's control at the headset. The gaze vector for an eye of the user can be within a threshold distance from one of the gaze sensors. By monitoring signals detected by the gaze sensors, it can be determined that the gaze vector is within the threshold distance from the gaze sensor. Based on this determination, at least one action associated with the headset is initiated.

US Patent:

20220238220, Jul 28, 2022

Filed:

Jan 20, 2022

Appl. No.:

17/580566

Inventors:

- Palo Alto CA, US
Kevin Boyle - San Francisco CA, US
Nitish Padmanaban - Menlo Park CA, US
Gordon Wetzstein - Palo Alto CA, US

International Classification:

G16H 40/67
A61B 3/113
G02B 27/00
G02B 27/01

Abstract:

Embodiments are related to a headset integrated into a healthcare platform. The headset comprises one or more sensors embedded into a frame of the headset, a controller coupled to the one or more sensors, and a transceiver coupled to the controller. The one or more sensors capture health information data for a user wearing the headset. The controller pre-processes at least a portion of the captured health information data to generate a pre-processed portion of the health information data. The transceiver communicates the health information data and the pre-processed portion of health information data to an intermediate device communicatively coupled to the headset. The intermediate device processes at least one of the health information data and the pre-processed portion of health information data to generate processed health information data for a health-related diagnostic of the user.

US Patent:

20210132693, May 6, 2021

Filed:

Nov 2, 2020

Appl. No.:

17/087053

Inventors:

- Fremont CA, US
Gordon Wetzstein - Fremont CA, US
Ryan Spicer - Fremont CA, US
Andrew Jones - Fremont CA, US
Tomi Maila - Fremont CA, US
Zisimos Economou - Fremont CA, US

Assignee:

Raxium, Inc. - Fremont CA

International Classification:

G06F 3/01
G02B 30/30
H04N 13/398

Abstract:

A multiview autostereoscopic display includes a display area including an array of angular pixels, an eye tracker, and a processing system. Each angular pixel emits color that varies across a field of view of that angular pixel. The array of angular pixels displays different views in different viewing zones across the field of view of the display. The eye tracker detects the presence of the eyes of at least one viewer within specific viewing zones and produces eye tracking information including locations of the detected eyes within the specific viewing zones. The processing system renders a specific view for each detected eye based upon the location of the detected eye within the viewing zone with detected eyes, and generates control information for the array of angular pixels to cause the specific view for each detected eye to be displayed in the viewing zone in which that eye was detected.

US Patent:

20180113311, Apr 26, 2018

Filed:

Oct 20, 2017

Appl. No.:

15/789895

Inventors:

- Plantation FL, US
Robert Konrad - Palo Alto CA, US
Gordon Wetzstein - Palo Alto CA, US
Brian T. Schowengerdt - Seattle WA, US
Michal Beau Vaughn - Austin TX, US

International Classification:

G02B 27/01
G02B 27/22
H04N 13/04
H04N 13/00

Abstract:

An augmented reality display system is configured to direct a plurality of parallactically-disparate intra-pupil images into a viewer's eye. The parallactically-disparate intra-pupil images provide different parallax views of a virtual object, and impinge on the pupil from different angles. In the aggregate, the wavefronts of light forming the images approximate a continuous divergent wavefront and provide selectable accommodation cues for the user, depending on the amount of parallax disparity between the intra-pupil images. The amount of parallax disparity is selected using a light source that outputs light for different images from different locations, with spatial differences in the locations of the light output providing differences in the paths that the light takes to the eye, which in turn provide different amounts of parallax disparity. Advantageously, the wavefront divergence, and the accommodation cue provided to the eye of the user, may be varied by appropriate selection of parallax disparity, which may be set by selecting the amount of spatial separation between the locations of light output.

US Patent:

20170146806, May 25, 2017

Filed:

Nov 21, 2016

Appl. No.:

15/358114

Inventors:

- Stanford CA, US
Mark L. Brongersma - Redwood City CA, US
Pieter G. Kik - Orlando FL, US
Gordon Wetzstein - Palo Alto CA, US

Assignee:

The Board of Trustees of the Leland Stanford Junior University - Stanford CA

International Classification:

G02B 27/22
H04N 13/02
G02B 5/00
G02B 13/00
G02B 1/00
G02B 3/00

Abstract:

Embodiments of 3D imaging systems that use a multifunctional, nano structured metalens to replace the conventional microlens array in light field imaging are disclosed. The optical focusing properties of the metalenses provided by gradient metasurface optical elements. The gradient metasurfaces allow the properties of the elements of the metalens array to be changed by tuning the gradient metasurfaces.

US Patent:

20160042501, Feb 11, 2016

Filed:

Aug 11, 2015

Appl. No.:

14/823906

Inventors:

- Oakland CA, US
Gordon Wetzstein - Cambridge MA, US
Brian Barsky - Berkeley CA, US
Ramesh Raskar - Cambridge MA, US

International Classification:

G06T 5/00
G02B 27/22

Abstract:

Systems and methods for compensating for at least one optical aberration in a vision system of a viewer viewing a display. Image data for an image to be displayed is received, at least one parameter related to at least one optical aberration in the vision system of a viewer is received and an aberration compensated image to be displayed is computed based on the at least one received parameter related to the vision system of a viewer and on at least one characteristic of the light field element. The aberration compensated image is displayed on the display medium, such that when a viewer whose vision system has the at least one optical aberration views the aberration compensated image displayed on the display medium through a light field element, the aberration compensated image appears to the viewer with the at least one aberration reduced or eliminated.