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公开(公告)号：US12292570B2
公开(公告)日：2025-05-06
申请号：US17774556
申请日：2020-09-21
Inventor： Brandon Hellman , Yuzuru Takashima
Abstract: A mobile augmented reality near to eye display having one of a single chip programmed, configured, or adapted to permit user selective field of view and a variable resolution image projection, or a single image guide adapted to multiplexed full color image transfer to achieve full color, 90 degrees FOV, and retinal image resolution.
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公开(公告)号：US20240369825A1
公开(公告)日：2024-11-07
申请号：US18686653
申请日：2022-08-25
Inventor： Yuzuru Takashima
Abstract: An optical system for modulating a light beam emitted by a laser light source. The system includes a phase light modulation device positioned to receive the laser light beam, a 4f relay optics positioned to receive light emitted from the phase light modulation device, and having a tilt mirror positioned in the light path, the tilt mirror having a center hole that permits light to pass therethrough and relay to a focusing lens, whereby a modulated and linearly polarized beam is transmitted; a quarter wave plate having a polarized beam splitter positioned to receive the modulated and linearly polarized beam; and a digital micromirror device that includes an array of micromirrors and that modulates amplitude of light in a pixelated manner by redirecting light into two directions, on- and off-directions, by electrically controlling the tilt angle of each micromirror.
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公开(公告)号：US11917123B2
公开(公告)日：2024-02-27
申请号：US17433058
申请日：2020-02-21
Inventor： Brandon Hellman , Yuzuru Takashima
IPC: G03B21/00 , H04N13/365 , H04N13/337 , H04N13/363
CPC classification number: H04N13/365 , H04N13/337 , H04N13/363
Abstract: A light projection system for projecting full-resolution, high quality images into different directions. The system includes a light source configured to provide a homogenous output beam of light and an illumination shaping optic elements configured with at least one of a predetermined cone angle, numerical aperture, and F-number. The system also includes a spatially-dependent, angular light modulator (ALM) with a plurality of pixels, each having an ON state, an OFF state, one input pupil, and N diffraction order pupils. The ALM is positioned such that the output beam is incident on the plurality of pixels. The at least one of the predetermined cone angle, numerical aperture, and F-number of the illumination shaping optic elements prevents contaminating light from entering an incorrect pupil. The system additionally includes a processor coupled to the ALM to provide discrete diffraction-based beam steering, whereby the ALM will project into one diffraction order at one time.
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公开(公告)号：US20220276484A1
公开(公告)日：2022-09-01
申请号：US17633767
申请日：2020-08-10
Inventor： Yuzuru Takashima , Brandon Hellman
Abstract: A design and implementation of a new optical architecture: space, time, and angular division multiplexed image transfer by Digital Micromirror Device. The method, like various multiplexing methods employed in communication engineering, enables image transfer via an angular band-limited data channel such as an optical image guide by dynamically redistributing a signal into multiple domains such as space, time, angle, wavelength, and polarization.
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公开(公告)号：US20220269086A1
公开(公告)日：2022-08-25
申请号：US17631713
申请日：2020-07-31
Inventor： Brandon Hellman , Yuzuru Takashima
Abstract: A light projection system includes an angle-dependent pattern projection device projecting light of multiple patterns into corresponding multiple directions, and a waveguide comprising an input and an output, configured to accept the light from the angle-dependent pattern projection device and emit the light through the output, whereby the light from each of the multiple patterns takes a unique path through the waveguide. The waveguide is built into a headset display device, and the output of the waveguide couples light emitted through the output to an eye.
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Patent Agency Ranking
公开(公告)号：US20250130417A1
公开(公告)日：2025-04-24
申请号：US18686560
申请日：2022-08-24
Inventor： Yuzuru Takashima
Abstract: An optical architecture for enhancing phase modulation depth for a phase light modulator includes a laser light source, a 4f, 1:1 relay where a tilted mirror with a center hole is placed at the backfocal point of the first lens. A vertically polarized (VP) and collimated light is deflected by a polarized beam splitter (PBS), followed by passing through a Quarter Wave Plate (QWP) that converts linear polarization (LP) to right circular polarization (RCP). Upon interaction of the RCP light with PLM, spatial phase is modulated by 2kd(i,j). PLM reflects and modulates phase of light while changing the handness of polarization from RHP to left hand circular polarization (LCP). The 2nd interaction with QWP changes polarization of light from LCP to horizontally polarized (HP) light. The mirror M1 is placed at a half of the Talbot distance from the PLM as described later. The reflected light by M1 is a HP light, therefore it goes through the PBS and is converted to RCP by the 3rd interaction with QWP. Finally the light is modulated by the PLM with the same phase modulation profile and reflected to the direction along the incident laser beam via QWP and PBS. After the laser beam is doubly modulated, the laser beam diffracted towards direction defined by the CGH pattern displayed on PLM. The diffracted beam is reflected by the mirror placed in the 4f 1:1 collimating optics followed by a collimating optics for beam steering.
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公开(公告)号：US11503255B2
公开(公告)日：2022-11-15
申请号：US16955285
申请日：2018-12-21
Inventor： Yuzuru Takashima , Brandon Hellman
Abstract: A light projection system, including a light source to provide an output beam of light, an angular light modulator (ALM) comprising a plurality of pixels, each pixel having an ON state and an OFF state, the ALM positioned to receive output beam on the plurality of pixels, and a processor coupled to the ALM. The processor is programmed to control a first set of the pixels to transition between the OFF state and the ON state while the beam is incident on the pixels. An amount of light is selectively directed in a direction by the first set. The processor is also programmed to control a second set of the plurality of pixels to remain in the OFF state while the beam is incident on the plurality of pixels. As a result, the ALM operates as a spatial light modulator and an angular light modulator of the beam of light.
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公开(公告)号：US20220350153A1
公开(公告)日：2022-11-03
申请号：US17760599
申请日：2020-09-14
Inventor： Yuzuru Takashima
Abstract: A gaze tracking platform for human-machine interface device, such as a wearable Augmented Reality Near-to-Eye Display. The gaze tracking method, digital illumination assisted analog feedback tracking employs neither auxiliary camera nor digital image processing of human eye image that confronts challenges in gaze tracking speed, power, cost and space. Instead, an analog-digital hybrid method to track the gaze inspired by the groove tracking method that is widely adopted for optical data storage systems. In the method, a digital micromirror device generates angular modulated and infrared illuminating beam. The cornea reflects the infrared light and a segmented photodiode detects the reflection while providing a feedback servo signal to the digital micromirror device controller. The feedback signal is integrated over a time provides the variation gaze. Moreover, infrared and angularly modulated illumination is time-multiplexed with information displayed in visible wavelength. In this manner, single display device is dual used for information display and gaze tracking that benefits especially augmented reality devices in terms of achieving small device form factor.
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公开(公告)号：US20210144347A1
公开(公告)日：2021-05-13
申请号：US16604804
申请日：2018-04-13
Inventor： Yuzuru Takashima , Brandon Hellman , Braden Smith
Abstract: A light projection system including a light source, a light controller optically and/or electrically coupled to the light source to generate a plurality of spatially-separated and independently-modulatable beams of light, and an angular light modulator (ALM) positioned to receive the beams of light and selectively direct the light from each beam into one of a plurality of directions. The light source can include a laser diode array. The light controller can be a spatial light modulator or a processor programmed to control an output of each of the lasers of the laser diode array. The angular light modulator may be a digital micromirror device (DMD). The ALM may be configured to project the images into corresponding diffraction orders of the ALM or the ALM may be configured to continuously scan the images.
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公开(公告)号：US20200379250A1
公开(公告)日：2020-12-03
申请号：US16604763
申请日：2018-04-13
Inventor： Yuzuru Takashima , Braden Smith , Brandon Hellman
Abstract: A beam steering apparatus including a first actuatable micromirror array (AMA) having a pitch, p, adapted to impart a modulation to a wavefront incident on the first AMA by a transition between a first state and a second state, wherein the first AMA has a transition time (T) between the first state and the second state, and at least one light source adapted to provide the incident wavefront having a duration, t, to the first AMA, where t≤T. The AMA may be a MEMS device such as a digital micromirror array. The beam steering apparatus may constitute a portion of LIDAR system.
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