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公开(公告)号：WO2023278652A1
公开(公告)日：2023-01-05
申请号：PCT/US2022/035646
申请日：2022-06-30
Applicant: AUTOMATION, INC. DBA RADAR , MUELLER, Joe , BLAIR, Adam , GOOS, Jeff
Inventor： MUELLER, Joe , BLAIR, Adam , GOOS, Jeff
Abstract: A radio-frequency identification (RFID) tag reader interrogates a passive RFID tag by transmitting a signal to the tag, then detecting a much weaker reply at the same carrier frequency from the tag. Unfortunately, self-interference caused by signal leakage within the reader or crosstalk among the reader's antenna elements can make the reply more difficult to detect and limit the range at which the reader can sense tags. A self-interference cancellation circuit in the reader reduces or suppresses the effects of signal leakage and crosstalk, enabling detection of weaker tag replies. The self-interference cancellation circuit can calibrate itself before each transmission to ensure good performance. This improves the reader's sensitivity, increases the reader' s range, reduces the reader's power consumption, and/or reduces the minimum required dynamic range of the analog- to-digital converters (ADCs) that digitize the received tag replies.
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公开(公告)号：WO2022040092A2
公开(公告)日：2022-02-24
申请号：PCT/US2021/046148
申请日：2021-08-16
Applicant: INDIGO TECHNOLOGIES, INC. , WAHAB, Adam , PURCHASE, Scott, T. , MADDEN, Peter , KRISTOFEK, Grant, W.
Inventor： WAHAB, Adam , PURCHASE, Scott, T. , MADDEN, Peter , KRISTOFEK, Grant, W.
Abstract: A stator assembly typically includes at least one stator core assembly that generates a magnetic field to rotate a rotor. The stator core assembly includes a core and a coil wrapped around the core to receive a current thus generating the magnetic field. To improve the performance and manufacturability of the stator assembly, a stator core assembly may include an insulator, disposed between the coil and the core, formed as a single flat sheet. A flat manufacturing process allows greater control of the insulator geometry, a broader range of materials to form the insulator, and patterning of structural features into the insulator to improve assembly and performance. The coil of the stator core assembly may also be electrically coupled to a bus bar using a fastener process and/or a crimping process that consumes less energy and occurs at lower temperatures than conventional soldering or welding processes.
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公开(公告)号：WO2022011359A1
公开(公告)日：2022-01-13
申请号：PCT/US2021/047647
申请日：2021-08-26
Applicant: E-VISION SMART OPTICS, INC. , VAN HEUGTEN, Anthony
Inventor： VAN HEUGTEN, Anthony
Abstract: An electro-active lens with stacked, rotated cylindrical electro-active lens elements can provide cylinder power along more axes than there are cylindrical electro-active lens elements. For instance, six stacked cylindrical electro-active lens elements, each aligned with a different lens meridian, can produce cylinder power along fifteen unique meridians when actuated up to three at a time. If these fifteen meridians are spaced at 12° increments, then the lens stack can provide cylinder power that is aligned well to correct astigmatism along any axis. Each cylindrical electro-active lens element in the stack can include a liquid crystal layer that is actuated by linear electrodes that are parallel to each other and orthogonal to both the cylindrical electro-active lens element's cylinder axis and optical axis. The electro-active lens can also include a spherical lens element that provides spherical power in addition to any net spherical power produced by the stacked cylindrical electro-active lens elements.
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公开(公告)号：WO2021086489A2
公开(公告)日：2021-05-06
申请号：PCT/US2020/048749
申请日：2020-08-31
Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY , CHOU, Jeffrey , BRAMHAVAR, Suraj, Deepak , ROBERTS, Christopher , ROESER, Christopher, A.D. , GHOSH, Siddhartha
Inventor： CHOU, Jeffrey , BRAMHAVAR, Suraj, Deepak , ROBERTS, Christopher , ROESER, Christopher, A.D. , GHOSH, Siddhartha
IPC: G06N10/00 , B82Y10/00 , G02F3/00 , G06N7/00 , H03B19/14 , H03B2200/0074 , H03B2200/008 , H03B5/1215
Abstract: Networks of superharmonic injection-locked (SHTL) electronic oscillators can be used to emulate Ising machines for solving difficult computational problems. The oscillators can be simulated or implemented in hardware (e.g., with LC oscillators) and are coupled to each other with links whose connection strengths are weighted according to the problem being solved. The oscillators' phases may be measured with respect to reference signal(s) from one or more reference oscillators, each of which emits a reference signal but does not receive input from any other oscillator. Sparsely connected networks of SHIL oscillators and reference oscillators can be used as Viterbi decoders that do not suffer from the information bottleneck between logic computational blocks and memory in digital computing systems. Sparsely connected networks of SHIL oscillators and reference oscillators can also be programmed to act as Boolean logic gates that operate in both forward and backward directions, enabling multipliers that can factor numbers.
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公开(公告)号：WO2021025759A1
公开(公告)日：2021-02-11
申请号：PCT/US2020/036557
申请日：2020-06-08
Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY , HU, Juejun , GU, Tian , SHALAGINOV, Mikhail
Inventor： HU, Juejun , GU, Tian , SHALAGINOV, Mikhail
Abstract: Wide-angle optical functionality is beneficial for imaging and image projection devices. Conventionally, wide-angle operation is attained by a complicated assembly of optical elements. Recent advances have led to meta-surface lenses or meta-lenses, which are ultra-thin planar lenses with nanoantennas that control the phase, amplitude, and/or polarization of light. Here, we present a meta-lens capable of diffraction-limited focusing and imaging over an unprecedented >170° angular field of view (FOV). The lens is integrated on a one-piece flat substrate and includes an aperture on one side and a single meta-surface on the other side. The meta-surface corrects third- order Seidel aberrations, including coma, astigmatism, and field curvature. The meta-lens has a planar focal plane, which enables considerably simplified system architectures for imaging and projection. The meta-lens design is generic and can be readily adapted to different meta-atom geometries and wavelength ranges to meet diverse application demands.
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Patent Agency Ranking
公开(公告)号：WO2020176556A1
公开(公告)日：2020-09-03
申请号：PCT/US2020/019783
申请日：2020-02-26
Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY , SCHULTZ, Kenneth
Inventor： SCHULTZ, Kenneth
Abstract: Amplitude-modulated (AM) signals spanning a spatial wide area can be efficiently detected using a slowly scanning optical system. The system decouples the AM carrier from the AM signal bandwidth (or carrier uncertainty), enabling Nyquist sampling of only the information-bearing AM signal (or the known frequency bandwidth). The system includes a staring sensor with N pixels ( e.g ., N > 10 6 ) that searches for a sinusoidal frequency of unknown phase and frequency, perhaps constrained to a particular band by a priori information about the signal. Counters in the sensor pixels mix the detected signals with local oscillators to down-convert the signal of interest, e.g ., to a baseband frequency. The counters store the down-converted signal for read out at a rate lower than the Nyquist rate of AM signal. The counts can be shifted among pixels synchronously with the optical line-of-sight for scanning operation.
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公开(公告)号：WO2020167370A1
公开(公告)日：2020-08-20
申请号：PCT/US2019/065689
申请日：2019-12-11
Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY , KITA, Derek , RIOS OCAMPO, Carlos, Andres , HU, Juejun
Inventor： KITA, Derek , RIOS OCAMPO, Carlos, Andres , HU, Juejun
Abstract: We disclose an on-chip photonic spectroscopy system capable of dramatically improving the signal -to-noise ratio (SNR), dynamic range, and reconstruction quality of Fourier transform spectrometers. Secondly, we disclose a system of components that makes up a complete on-chip RF spectrum analyzer with low-cost and high-performance.
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8.发明申请
公开(公告)号：WO2020102204A1
公开(公告)日：2020-05-22
申请号：PCT/US2019/060935
申请日：2019-11-12
Inventor： HAMERLY, Ryan , ENGLUND, Dirk Robert
Abstract: Deep learning performance is limited by computing power, which is in turn limited by energy consumption. Optics can make neural networks faster and more efficient, but current schemes suffer from limited connectivity and the large footprint of low-loss nanophotonic devices. Our optical neural network architecture addresses these problems using homodyne detection and optical data fan-out. It is scalable to large networks without sacrificing speed or consuming too much energy. It can perform inference and training and work with both fully connected and convolutional neural-network layers. In our architecture, each neural network layer operates on inputs and weights encoded onto optical pulse amplitudes. A homodyne detector computes the vector product of the inputs and weights. The nonlinear activation function is performed electronically on the output of this linear homodyne detection step. Optical modulators combine the outputs from the nonlinear activation function and encode them onto optical pulses input into the next layer.
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公开(公告)号：WO2020076741A1
公开(公告)日：2020-04-16
申请号：PCT/US2019/055083
申请日：2019-10-08
Applicant: E-VISION SMART OPTICS, INC. , VAN HEUGTEN, Anthony , TRAJKOVSKA-BROACH, Anita , MILTON, Harry
Inventor： VAN HEUGTEN, Anthony , TRAJKOVSKA-BROACH, Anita , MILTON, Harry
IPC: G02B26/02
Abstract: Bright ambient light can wash out a virtual image in a conventional augmented reality device. Fortunately, this problem can be prevented with a variable electro-active beam splitter whose reflect/transmit ratio can be varied or switched on and off rapidly at a duty cycle based on the ambient level. As the ambient light gets brighter, the beam splitter's transmit/reflect ratio can be shifted so that the beam splitter reflects more light from the display and transmits less ambient light to the user's eye. The beam splitter can also be switched between a highly reflective state and a highly transmissive state at a duty cycle selected so that the eye spends more time integrating reflected display light than integrating transmitted ambient light. The splitting ratio and/or duty cycle can be adjusted as the ambient light level changes to provide the optimum experience for the user.
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公开(公告)号：WO2020027868A3
公开(公告)日：2020-02-06
申请号：PCT/US2019/016752
申请日：2019-02-06
Inventor： ENGLUND, Dirk, Robert
Abstract: Most artificial neural networks are implemented electronically using graphical processing units to compute products of input signals and predetermined weights. The number of weights scales as the square of the number of neurons in the neural network, causing the power and bandwidth associated with retrieving and distributing the weights in an electronic architecture to scale poorly. Switching from an electronic architecture to an optical architecture for storing and distributing weights alleviates the communications bottleneck and reduces the power per transaction for much better scaling. The weights can be distributed at terabits per second at a power cost of picojoules per bit (versus gigabits per second and femtojoules per bit for electronic architectures). The bandwidth and power advantages are even better when distributing the same weights to many optical neural networks running simultaneously.
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