公开(公告)号：WO2022086615A2

公开(公告)日：2022-04-28

申请号：PCT/US2021/043593

申请日：2021-07-29

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY ,  HAMERLY, Ryan ,  ENGLUND, Dirk, Robert

Inventor： HAMERLY, Ryan ,  ENGLUND, Dirk, Robert

IPC: H04B10/80 ,  H04J14/02 ,  G06F1/06

Abstract: NetCast is an optical neural network architecture that circumvents constraints on deep neural network (DNN) inference at the edge. Many DNNs have weight matrices that are too large to run on edge processors, leading to limitations on DNN inference at the edge or bandwidth bottlenecks between the edge and server that hosts the DNN. With NetCast, a weight server stores the DNN weight matrix in local memory, modulates the weights onto different spectral channels of an optical carrier, and distributes the weights to one or more clients via optical links. Each client stores the activations, or layer inputs, for the DNN and computes the matrix-vector product of those activations with the weights from the weight server in the optical domain. This multiplication can be performed coherently by interfering the spectrally multiplexed weights with spectrally multiplexed activations or incoherently by modulating the weight signal from the weight server with the activations.

公开(公告)号：WO2022026053A1

公开(公告)日：2022-02-03

申请号：PCT/US2021/035105

申请日：2021-06-01

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY ,  RAM, Rajeev, J. ,  ATABAKI, Amir, H. ,  PERSITS, Nili ,  KIM, Jaehwan

Inventor： RAM, Rajeev, J. ,  ATABAKI, Amir, H. ,  PERSITS, Nili ,  KIM, Jaehwan

IPC: G01J3/44 ,  G01J3/02 ,  G01J3/06 ,  G01J3/36

Abstract: Swept-source Raman spectroscopy uses a tunable laser and a fixed-wavelength detector instead of a spectrometer or interferometer to perform Raman spectroscopy with the throughput advantage of Fourier transform Raman spectroscopy without bulky optics or moving mirrors. Although the tunable laser can be larger and more costly than a fixed wavelength diode laser used in other Raman systems, it is possible to split and switch the laser light to multiple ports simultaneously and/or sequentially. Each site can be monitored by its own fixed-wavelength detector. This architecture can be scaled by cascading fiber switches and/or couplers between the tunable laser and measurement sites. By multiplexing measurements at different sites, it is possible to monitor many sites at once. Moreover, each site can be meters to kilometers from the tunable laser. This makes it possible to perform swept-source Raman spectroscopy at many points across a continuous flow manufacturing environment with a single laser.

公开(公告)号：WO2021101612A2

公开(公告)日：2021-05-27

申请号：PCT/US2020/048334

申请日：2020-08-28

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY ,  SWEENEY, Robert

Inventor： SWEENEY, Robert

IPC: G06T7/00 ,  G01S17/89

Abstract: Radar, lidar, and other active 3D imaging techniques require large, heavy sensors that consume lots of power. Passive 3D imaging techniques based on feature matching are computationally expensive and limited by the quality of the feature matching. Fortunately, there is a robust, computationally inexpensive way to generate 3D images from full-motion video acquired from a platform that moves relative to the scene. The full-motion video frames are registered to each other and mapped to the scene coordinates using data about the trajectory of the platform with respect to the scene. The time derivative of the registered frames equals the product of the height map of the scene, the projected angular velocity of the platform, and the spatial gradient of the registered frames. This relationship can be solved in (near) real time to produce the height map of the scene from the full-motion video and the trajectory.

公开(公告)号：WO2021076221A1

公开(公告)日：2021-04-22

申请号：PCT/US2020/046729

申请日：2020-08-18

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY ,  CHOI, Hyeongrak ,  ENGLUND, Dirk, Robert

Inventor： CHOI, Hyeongrak ,  ENGLUND, Dirk, Robert

IPC: H04B10/70 ,  H01L29/66 ,  B82Y10/00 ,  G06N10/00 ,  C30B29/04 ,  G02B6/30

Abstract: Quantum information processing involves entangling large numbers of qubits, which can be realized as defect centers in a solid-state host. The qubits can be implemented as individual unit cells, each with its own control electronics, that are arrayed in a cryostat. Free- space control and pump beams address the qubit unit cells through a cryostat window. The qubit unit cells emit light in response to these control and pump beams and microwave pulses applied by the control electronics. The emitted light propagates through free space to a mode mixer, which interferes the optical modes from adjacent qubit unit cells for heralded Bell measurements. The qubit unit cells are small (e.g., 10 pm square), so they can be tiled in arrays of up to millions, addressed by free- space optics with mi cron- scale spot sizes. The processing overhead for this architecture remains relatively constant, even with large numbers of qubits, enabling scalable large-scale quantum information processing.

公开(公告)号：WO2021040878A1

公开(公告)日：2021-03-04

申请号：PCT/US2020/040078

申请日：2020-06-29

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY ,  KANG, Jeon, Woong ,  SO, Peter, T.C.

Inventor： KANG, Jeon, Woong ,  SO, Peter, T.C.

IPC: A61B5/1455

Abstract: Noninvasive glucose monitoring has been a long-standing need in diabetes management. Among many approaches to meeting this need, Raman spectroscopy has attracted attention due to its molecular specificity. Previous Raman-based glucose sensing can predict blood glucose concentration based on a statistical correlation between the reference glucose concentration and unspecified spectral features. However, the lack of glucose Raman peaks and non-prospective prediction have led to questions about the effectiveness of in vivo Raman spectroscopy for transcutaneous glucose sensing. Here, we disclose technology for directly observing distinct glucose Raman spectra from skin. The Raman signal intensities were proportional to the reference glucose concentrations in three live swine glucose clamping experiments. Tracking the spectral intensity based on the linearity enables prospective prediction with high accuracy in within-subject and inter-subject models. Compared to previous statistical approaches, prospective predictions based on a direct glucose signal from the skin offers robust, reliable noninvasive glucose sensing.

公开(公告)号：WO2021003323A1

公开(公告)日：2021-01-07

申请号：PCT/US2020/040584

申请日：2020-07-02

Applicant: PAINTED DOG, INC. ,  BROWARNIK, Jared, Max ,  AIZAWA, Ken

Inventor： BROWARNIK, Jared, Max ,  AIZAWA, Ken

IPC: G06K9/00 ,  G06Q20/12 ,  G06T7/00 ,  H04N21/81

Abstract: Shoppable video enables a viewer to identify and buy items appearing in a video. To retrieve information about the items in a frame of the video, the playback device generates a perceptual hash of that frame and uses that hash to query a first database storing perceptual hashes of different version of the video. The database query returns an identifier for the frame, which is then used to query a second database that store the item information. The results of this query are returned to the playback device, which shows them to the user, enabling the viewer to learn more about and possibly purchase the item. Using queries based on perceptual hashes of different versions of the video increases the likelihood of returning a match, despite formatting differences. And using separate hash and metadata databases makes it possible to update the metadata without changing the hashes.

公开(公告)号：WO2020117245A1

公开(公告)日：2020-06-11

申请号：PCT/US2018/064265

申请日：2018-12-06

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY ,  MILSTEIN, Adam ,  WYNN, Charles ,  RACHLIN, Yaron ,  SULLENBERGER, Ryan ,  KAUSHIK, Sumanth

Inventor： MILSTEIN, Adam ,  WYNN, Charles ,  RACHLIN, Yaron ,  SULLENBERGER, Ryan ,  KAUSHIK, Sumanth

IPC: A61B5/00 ,  G01J3/28 ,  G01N21/25

Abstract: A hyperspectral imaging system comprising: a first dispersive element to disperse an image moving laterally with respect to an optical axis of the hyperspectral imaging system into N spectral components, a coding mask, in optical communication with the first dispersive element, to encode the N spectral components with a predetermined code, a second dispersive element, in optical communication with the coding mask, to recombine the N spectral components into an encoded image, a detector array, in optical communication with the second dispersive element and having M >/= N detector elements, to detect the encoded image, wherein M and N are positive integers and a processor, operably coupled to the detector array, to form a reconstructed version of the image from the encoded image, the processor configured to estimate the motion blur from the reconstructed version of the image based on the predetermined code.

公开(公告)号：WO2020068280A1

公开(公告)日：2020-04-02

申请号：PCT/US2019/045661

申请日：2019-08-08

Applicant: BRIGHTSPEC, INC. ,  NEILL, Justin, L. ,  MUCKLE, Matt ,  REYNOLDS, Roger

Inventor： NEILL, Justin, L. ,  MUCKLE, Matt ,  REYNOLDS, Roger

IPC: A61B5/00 ,  A61B5/055 ,  G01R33/485

Abstract: Molecular rotational resonance (MRR) spectroscopy is a structurally-specific, high-resolution spectroscopy technique that can provide accurate reaction process data with finer time resolution than existing techniques. It is the only analytical technique that can make online chiral composition measurements. This makes it especially useful for online reaction monitoring, which is done today by manually pulling off samples and measuring samples offline and takes 3-4 hours per measurement. Conversely, an MRR spectrometer can resolve isomers in about 10 minutes when fed with a low-volatility sampling interface that connects directly to the reaction line. The sampling interface measures a precise sample of the reaction solution, boils off the solvent to concentrate the analyte, volatilizes the analyte, and injects the volatilized analyte into the MRR spectrometer's measurement chamber for an MRR measurement. The sample concentration and volatilization happen quickly and without any extra sample preparation.

公开(公告)号：WO2020046860A1

公开(公告)日：2020-03-05

申请号：PCT/US2019/048238

申请日：2019-08-27

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY ,  BARRY, John, F. ,  EISENACH, Erik, R. ,  O'KEEFFE, Michael, F. ,  MAJUMDER, Jonah, A. ,  PHAM, Linh, M. ,  CHUANG, Isaac ,  THOMPSON, Erik, M. ,  PANUSKI, Christopher, Louis ,  ZHANG, Xingyu ,  BRAJE, Danielle, A.

Inventor： BARRY, John, F. ,  EISENACH, Erik, R. ,  O'KEEFFE, Michael, F. ,  MAJUMDER, Jonah, A. ,  PHAM, Linh, M. ,  CHUANG, Isaac ,  THOMPSON, Erik, M. ,  PANUSKI, Christopher, Louis ,  ZHANG, Xingyu ,  BRAJE, Danielle, A.

IPC: G01R33/60 ,  G01N24/00 ,  G01N24/08 ,  G01R33/62 ,  G01N24/006 ,  G01N24/10 ,  G01R33/0017 ,  G01R33/032 ,  G01R33/1284 ,  G01R33/26 ,  G01R33/323 ,  G01R33/345

Abstract: Microwave resonator readout of the cavity-spin interaction between a spin defect center ensemble and a microwave resonator yields fidelities that are orders of magnitude higher than is possible with optical readouts. In microwave resonator readout, microwave photons probe a microwave resonator coupled to a spin defect center ensemble subjected to a physical parameter to be measured. The physical parameter shifts the spin defect centers' resonances, which in turn change the dispersion and/or absorption of the microwave resonator. The microwave photons probe these dispersion and/or absorption changes, yielding a measurement with higher visibility, lower shot noise, better sensitivity, and higher signal-to-noise ratio than a comparable fluorescence measurement. In addition, microwave resonator readout enables coherent averaging of spin defect center ensembles and is compatible with spin systems other than nitrogen vacancies in diamond.

公开(公告)号：WO2020036626A2

公开(公告)日：2020-02-20

申请号：PCT/US2019/016751

申请日：2019-02-06

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY ,  ENGLUND, Dirk, Robert ,  PENG, Cheng

Inventor： ENGLUND, Dirk, Robert ,  PENG, Cheng

IPC: G02F1/29

Abstract: Modulating graphene's optical conductivity with an electrolyte nanopatterning technique reduces or eliminates scattering loss caused by rough edges from etching. This technique uses a resist mask patterned with features as small as 30 nm to shield graphene from ions in an electrolyte. It can provide a carrier density variation of about 10 14 cm -2 across a length of just 15 nm. And it can be combined with a technique of growing or transferring graphene on atomically smooth hexagonal boron nitride (hBN) to increase graphene's carrier mobility, e.g., to 10,000 cm 2 /(V.s) or more. The resulting graphene metamaterials can be used to make voltage-tunable electro- optical devices, such as beam-steering devices, electro-optical switch and modulators, and reconfigurable holograms.