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Researchers Improve ToF Resolution 1000-Fold Using Computational Approach

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CAMBRIDGE, Mass., Dec. 28, 2017 — In a novel approach to time-of-flight (ToF) imaging, researchers correlated the principle of heterodyning to ToF, increasing depth resolution 1000-fold. Higher ToF resolution could enable accurate distance measurements through fog, removing a major obstacle to the development of self-driving cars. At a range of 2 m, existing ToF systems have a depth resolution of about 1 cm. In contrast, a new ToF system developed by a team at MIT has a depth resolution of 3 µm at distances of 2 m. MIT researchers present a new scheme of heterodyne lidar that uses a cascaded stack of...Read full article

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    Dec 2017
    machine vision
    Interpretation of an image of an object or scene through the use of optical noncontact sensing mechanisms for the purpose of obtaining information and/or controlling machines or processes.
    time of flight
    (TOF) The length of time needed for a signal to arrive at and be reflected from the target. The basis of an active autoranging/autofocus system.
    computer graphics
    Computer output in the form of pictorial representation (graphs, charts, drawings, etc.) that is displayed visually.
    An acronym of light detection and ranging, describing systems that use a light beam in place of conventional microwave beams for atmospheric monitoring, tracking and detection functions. Ladar, an acronym of laser detection and ranging, uses laser light for detection of speed, altitude, direction and range; it is often called laser radar.
    In optical communications, the translation of optical signals into radio signals, lowering their frequency in detection from greater than 1014 Hz to less than 1010 Hz, so that further signal processing can be done with conventional circuitry, yielding improved receiver sensitivity and selectivity.
    A sub-field of photonics that pertains to an electronic device that responds to optical power, emits or modifies optical radiation, or utilizes optical radiation for its internal operation. Any device that functions as an electrical-to-optical or optical-to-electrical transducer. Electro-optic often is used erroneously as a synonym.
    Research & TechnologyeducationAmericasimagingmachine visiontime of flightTOFcamerascomputer graphicslidarinterferometersautomotivedefenseheterodyningoptoelectronics

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