Abstract: Example embodiments relate to time-division multiple access scanning for crosstalk mitigation in light detection and ranging (lidar) devices. An example embodiment includes a method. The method includes emitting a first group of light signals into a surrounding environment. The first group of light signals corresponds to a first angular resolution. The method also includes detecting, during a first listening window, a first group of reflected light signals. Additionally, the method includes emitting a second group of light signals into the surrounding environment. The second group of light signals corresponds to a second angular resolution with respect to the surrounding environment. The second angular resolution is lower than the first angular resolution. Further, the method includes detecting a second group of reflected light signals from the surrounding environment. In addition, the method includes synthesizing, by a controller of the lidar device, a dataset usable to generate one or more point clouds.

Abstract: An ophthalmic device comprises an ultrasonic transducer, an accommodation actuator, and a controller. When the ophthalmic device is mounted in or on an eye of a user, the ultrasonic transducer is positioned to direct ultrasonic signals towards ciliary processes in the eye and the accommodation actuator is positioned to focus light entering the eye. The controller is coupled to the ultrasonic transducer and the accommodation actuator. The controller includes logic that when executed by the controller causes the ophthalmic device to perform operations including emitting the ultrasonic signals from the ultrasonic transducer towards the ciliary processes, receiving reflected ultrasonic signals from the ciliary processes with the ultrasonic transducer, calculating a time of flight between emitting the ultrasonic signals and receiving the reflected ultrasonic signals, and adjusting an optical power of the accommodation actuator based on the time of flight.

Abstract: Example embodiments relate to mitigating crosstalk from high-intensity returns in a light detection and ranging (lidar) device. An example embodiment includes a lidar device. The lidar device includes an array of channels. Each channel includes a light detector and a corresponding light emitter. The lidar device also includes a controller. The controller is configured to cause one or more of the light emitters to emit light pulses. The controller is also configured to determine, based on a reflection pulse, that a high-reflectivity surface is present in a surrounding environment and a distance between the lidar device and the high-reflectivity surface. Additionally, the controller is configured to determine which of the other light detectors within the array of channels are susceptible to crosstalk from the first channel. Further, the controller is configured to identify one or more detected pulses that represent crosstalk from the first channel.

Abstract: An ophthalmic device comprises an ultrasonic transducer, an accommodation actuator, and a controller. When the ophthalmic device is mounted in or on an eye of a user, the ultrasonic transducer is positioned to direct ultrasonic signals towards ciliary processes in the eye and the accommodation actuator is positioned to focus light entering the eye. The controller is coupled to the ultrasonic transducer and the accommodation actuator. The controller includes logic that when executed by the controller causes the ophthalmic device to perform operations including emitting the ultrasonic signals from the ultrasonic transducer towards the ciliary processes, receiving reflected ultrasonic signals from the ciliary processes with the ultrasonic transducer, calculating a time of flight between emitting the ultrasonic signals and receiving the reflected ultrasonic signals, and adjusting an optical power of the accommodation actuator based on the time of flight.

Abstract: Accommodating ophthalmic devices including an ambient light sensor and an accommodation sensor and related methods of use are described. In an example, the accommodation sensor is configured to measure a biological accommodation signal of an eye on or in which the accommodating ophthalmic device is mounted. In an embodiment, the accommodating ophthalmic device is configured to measure the biological accommodation signals based on ambient light, such as based on an intensity or amount of ambient light, incident on the accommodating ophthalmic device. Such ambient light may be measured with the ambient light sensor.

Abstract: An optical receiver includes a plurality of photodetectors, a shared memory, and a pulse calibration processing unit communicatively coupled to the shared memory. The optical receiver also includes a hardware accelerator module configured to accept input waveforms from the plurality of photodetectors and compare an amplitude of the respective input waveforms with a predetermined threshold. Based on the comparison, the hardware accelerator module could determine subsets of the input waveforms and determine information indicative of characteristic aspects of the subsets of the input waveforms. The optical receiver is additionally operable to store the determined information in the shared memory and trigger an interrupt for the pulse calibration processing unit to initiate a pulse calibration process on the determined information.

Abstract: Computing devices, systems, and methods described in various embodiments herein may relate to a light detection and ranging (lidar) system. An example computing device could include a controller having at least one processor and at least one memory. The at least one processor is configured to execute program instructions stored in the at least one memory so as to carry out operations. The operations include receiving information identifying an environmental condition surrounding a vehicle, the environmental condition being at least one of fog, mist, snow, dust, or rain. The operations also include determining a range of interest within a field of view of the lidar system based on the received information. The operations also include adjusting at least one of: a return light detection time period, sampling rate, or filtering threshold, for at least a portion of the field of view based on the determined range of interest.

Abstract: A light detection and ranging (lidar) device may be coupled to a vehicle and configured to scan a surrounding environment to determine ranges to one or more objects in the surrounding environment of the vehicle. The lidar device may generate data that can be used to form a range image, which includes or is based on range data determined for the one or more objects. The lidar device may also generate data that can be used to form a corresponding background image, which includes background light intensity data that the lidar device measures during the scan. The background image or background image data may be used to add range data to the range image, correct range data in the range image, and/or evaluate the quality of the range data in the range image. In this way, the background image or background image data can be used to generate an enhanced range image that includes range data that is more comprehensive and/or more reliable than the range data included in the original range image.

Abstract: Ophthalmic systems and methods of changing an optical power of an ophthalmic system are described. In an example, the ophthalmic system includes an accommodating intraocular device shaped to be implantable in an eye and an extraocular device separate from the accommodating intraocular device shaped to be removably mountable to a portion of the eye outside a bulb of the eye, such as an underlid portion of the eye. In an example, the method includes wirelessly transmitting power from a power source of an extraocular device removably mounted outside a bulb of an eye to an accommodating intraocular device implanted in the eye.

Abstract: An ophthalmic device includes an accommodating optic having adjustable optical power, an optical tap positioned within a vision of an eye when the ophthalmic device is mounted in or on the eye, an image sensor positioned outside of a foveal vision of the eye when the ophthalmic device is mounted in or on the eye, and a controller coupled to the accommodating optic and the image sensor. The optical tap redirects a portion of the vision light that passes through the accommodating optic as tapped light. The image sensor is aligned to receive the tapped light from the optical tap and adapted to generate image data indicative of a focus of the vision light in response to the tapped light. The controller is adapted to generate an accommodation control signal that manipulates the adjustable optical power of the accommodating optic based upon the image data.

Abstract: Accommodating ophthalmic devices including an ambient light sensor and an accommodation sensor and related methods of use are described. In an example, the accommodation sensor is configured to measure a biological accommodation signal of an eye on or in which the accommodating ophthalmic device is mounted. In an embodiment, the accommodating ophthalmic device is configured to measure the biological accommodation signals based on ambient light, such as based on an intensity or amount of ambient light, incident on the accommodating ophthalmic device. Such ambient light may be measured with the ambient light sensor.

Abstract: Ophthalmic systems and methods of changing an optical power of an ophthalmic system are described. In an example, the ophthalmic system includes an accommodating intraocular device shaped to be implantable in an eye and an extraocular device separate from the accommodating intraocular device shaped to be removably mountable to a portion of the eye outside a bulb of the eye, such as an underlid portion of the eye. In an example, the method includes wirelessly transmitting power from a power source of an extraocular device removably mounted outside a bulb of an eye to an accommodating intraocular device implanted in the eye.

Abstract: An ophthalmic device includes an accommodating optic having adjustable optical power, an optical tap positioned within a vision of an eye when the ophthalmic device is mounted in or on the eye, an image sensor positioned outside of a foveal vision of the eye when the ophthalmic device is mounted in or on the eye, and a controller coupled to the accommodating optic and the image sensor. The optical tap redirects a portion of the vision light that passes through the accommodating optic as tapped light. The image sensor is aligned to receive the tapped light from the optical tap and adapted to generate image data indicative of a focus of the vision light in response to the tapped light. The controller is adapted to generate an accommodation control signal that manipulates the adjustable optical power of the accommodating optic based upon the image data.

Abstract: An ophthalmic device comprises an ultrasonic transducer, an accommodation actuator, and a controller. When the ophthalmic device is mounted in or on an eye of a user, the ultrasonic transducer is positioned to direct ultrasonic signals towards ciliary processes in the eye and the accommodation actuator is positioned to focus light entering the eye. The controller is coupled to the ultrasonic transducer and the accommodation actuator. The controller includes logic that when executed by the controller causes the ophthalmic device to perform operations including emitting the ultrasonic signals from the ultrasonic transducer towards the ciliary processes, receiving reflected ultrasonic signals from the ciliary processes with the ultrasonic transducer, calculating a time of flight between emitting the ultrasonic signals and receiving the reflected ultrasonic signals, and adjusting an optical power of the accommodation actuator based on the time of flight.

Abstract: A fire suppressing gas generator includes a cylindrical housing comprising an array of discharge ports distributed generally uniformly therearound; a cylindrical filter disposed within the housing and spaced from the interior wall of the housing; a plurality of azide-based propellant grains inside the cylindrical filter; and at least one ignition device associated with the propellant grains. The propellant grains when ignited by the ignition device generate a fire suppressing gas which passes through the filter and out of the discharge ports of the cylindrical housing for delivery into a space.

Abstract: A fire suppressing gas generator includes a cylindrical housing comprising an array of discharge ports distributed generally uniformly therearound; a cylindrical filter disposed within the housing and spaced from the interior wall of the housing; a plurality of azide-based propellant grains inside the cylindrical filter; and at least one ignition device associated with the propellant grains. The propellant grains when ignited by the ignition device generate a fire suppressing gas which passes through the filter and out of the discharge ports of the cylindrical housing for delivery into a space.

Abstract: An inflator (40) includes structure defining a fluid storage chamber (50) and an exit passage (94). A fluid (52) stored in the chamber (50), when heated beyond a predetermined temperature, undergoes one of combustion, thermal decomposition, or a change of state to result in inflation fluid. An ignitor (82), when actuated, heats the fluid (52) beyond the predetermined temperature and produces an ignitor jet (210) of combustion products directed in a first direction into the chamber (50). An ignitor jet deflector (200) deflects the ignitor jet (210) in a second direction transverse to the first direction.

Abstract: An inflator (10) includes a container (12) having a fluid storage chamber (70) and an exit passage (64). A fluid (80) is stored in the chamber (70). The fluid (80), when heated beyond a predetermined temperature, undergoes one of combustion, thermal decomposition, or a change of state to result in inflation fluid. An igniter (82) of the inflator (10), when actuated, heats the fluid (80) beyond the predetermined temperature. The inflator (10) also includes structure (110) that is located within the chamber (70) for limiting the flow of the fluid through the exit passage (64) of the container (12) prior to being heated beyond the predetermined temperature.