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公开(公告)号：US11137498B2
公开(公告)日：2021-10-05
申请号：US15894744
申请日：2018-02-12
Applicant: Microvision, Inc.
Inventor： Jari Honkanen , P. Selvan Viswanathan , Robert James Jackson
Abstract: A scanning rangefinding system includes a MEMS device with a scanning mirror that sweeps a beam in two dimensions. Actuating circuits receive angular extents and offset information and provide signal stimulus to the MEMS device to control the amount and direction of mirror deflection on two axes. The scan angle and offset information may be modified to create a repeating pattern of different fields of view.
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公开(公告)号：US20200026065A1
公开(公告)日：2020-01-23
申请号：US16042898
申请日：2018-07-23
Applicant: Microvision, Inc.
Inventor： P. Selvan Viswanathan , Matthieu Saracco , Roger F. Johnson , Ian Blanch
Abstract: An angular velocity correcting optical device receives a sinusoidally swept input light beam and outputs a non-sinusoidally swept output beam. The output beam may have a constant angular velocity. The output beam may have a constant pitch on a target surface for a constant periodicity pulsed light beam. Optical surfaces may be freeform surfaces specified by polynomials.
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公开(公告)号：US10474248B2
公开(公告)日：2019-11-12
申请号：US15894708
申请日：2018-02-12
Applicant: Microvision, Inc.
Inventor： P. Selvan Viswanathan , Jari Honkanen
Abstract: A scanned beam 3D sensing system includes smart infrared pulsing to detect objects in a field of view. Infrared laser light pulses are emitted at a first density in a field of view and reflections are detected. Times of flight of the infrared laser light pulses are measured to determine if an object is in the field of view. The density of the infrared pulses may be increased based on various factors. The higher density infrared pulses may be scanned in a region of interest that is a subset of the field of view. Power consumption is reduced by reducing the density of laser pulses when possible.
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公开(公告)号：US20190250721A1
公开(公告)日：2019-08-15
申请号：US15894708
申请日：2018-02-12
Applicant: Microvision, Inc.
Inventor： P. Selvan Viswanathan , Jari Honkanen
Abstract: A scanned beam 3D sensing system includes smart infrared pulsing to detect objects in a field of view. Infrared laser light pulses are emitted at a first density in a field of view and reflections are detected. Times of flight of the infrared laser light pulses are measured to determine if an object is in the field of view. The density of the infrared pulses may be increased based on various factors. The higher density infrared pulses may be scanned in a region of interest that is a subset of the field of view. Power consumption is reduced by reducing the density of laser pulses when possible.
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公开(公告)号：US10061441B2
公开(公告)日：2018-08-28
申请号：US15390927
申请日：2016-12-27
Applicant: Microvision, Inc.
Inventor： Jonathan A. Morarity , Patrick J. McVittie , P. Selvan Viswanathan , Ru Chen , Justin R. Zilke
CPC classification number: G06F3/0421 , G01S17/88 , G06F3/017 , G06F3/0416 , G06F3/0418 , G06F3/0423 , G06F3/0426 , G06F2203/04101 , G06F2203/04108
Abstract: A projection system emits light pulses in a field of view and measures properties of reflections. Properties may include time of flight and return amplitude. Foreground objects and background surfaces are distinguished, distances between foreground objects and background surfaces are determined based on reflections that are occluded by the foreground objects and other properties of the projection system.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20180176551A1
公开(公告)日：2018-06-21
申请号：US15386576
申请日：2016-12-21
Applicant: Microvision, Inc.
Inventor： P. Selvan Viswanathan , Jari Honkanen , Douglas R. Wade , Bin Xue
CPC classification number: H04N13/388 , G01B11/25 , H04N9/3161 , H04N13/128 , H04N13/324
Abstract: Devices and methods are described herein for providing foveated image projection. In general, at least one source of laser light is used to generate a laser beam, and scanning mirror(s) that reflect the laser beam into a pattern of scan lines. The source of light is controlled to selectively generate projected image pixels during a first portion of the pattern of scan lines, and to selectively generate depth mapping pulses during a second portion of the pattern of scan lines. The projected image pixels generate a projected image, while the depth mapping pulses are reflected from the surface, received, and used to generate a 3-dimensional point clouds that describe the measured surface depth at each point. Thus, during each scan of the pattern both a projected image and a surface depth map can be generated, with the surface depth map used to modify some portion of the projected pixels.
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公开(公告)号：US09921056B2
公开(公告)日：2018-03-20
申请号：US15661270
申请日：2017-07-27
Applicant: Microvision, Inc.
Inventor： Jari Honkanen , P. Selvan Viswanathan
CPC classification number: G01B11/2518 , G01S7/4817 , G01S7/4863 , G01S17/08 , G01S17/89
Abstract: Devices and methods are described that provide for scanning surfaces and generating 3-dimensional point clouds that describe the depth of the measured surface at each point. In general, the devices and methods utilize scanning mirror(s) that reflect a laser beam into a pattern of scan lines. When the raster pattern of scan lines is directed at a surface, reflections of the laser beam from the surface are received and used to the generate 3-dimensional point clouds that describe the measured surface depth at each point. The motion of the scanning mirror(s) can be dynamically adjusted to modify the characteristics of the resulting 3-dimensional point cloud of the surface. For example, the adjustment of the scanning mirror motion can modify the resolution or data density of the resulting 3-dimensional point cloud that describes the measured depths of the surface.
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公开(公告)号：US20170068393A1
公开(公告)日：2017-03-09
申请号：US14845963
申请日：2015-09-04
Applicant: Microvision, Inc.
Inventor： P. Selvan Viswanathan , Jari Honkanen , Bharath Rajagopalan , Alexander Tokman
CPC classification number: G01S7/4865 , G01S17/10 , G01S17/89 , G06F3/037 , G06F3/0416 , G06F3/0423 , G06F2203/04101 , H04N9/3129 , H04N9/3161 , H04N9/3164 , H04N9/3194
Abstract: A scanning display system includes hybrid data acquisition. Data can be acquired in a time-of-flight mode, or in a non-time-of-flight mode. Infrared light pulses may be used in both modes. The infrared light pulses may have different characteristics. Time-of-flight data acquisition and non-time-of-flight data acquisition may be used sequentially or simultaneously.
Abstract translation: 扫描显示系统包括混合数据采集。 可以在飞行时间模式或非飞行时间模式下获取数据。 红外光脉冲可用于两种模式。 红外光脉冲可能具有不同的特性。 可以顺序或同时使用飞行时间数据采集和非飞行时间数据采集。
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公开(公告)号：US20150237316A1
公开(公告)日：2015-08-20
申请号：US14183039
申请日：2014-02-18
Applicant: Microvision, Inc.
Inventor： P. Selvan Viswanathan , Markus Duelli
CPC classification number: H04N9/3182 , G02B26/101 , G02B26/105 , H04N9/3135
Abstract: A scanning projector includes a brightness compensation component. The brightness compensation component modifies pixel brightness as a function of instantaneous scan phase of a sinusoidally scanning mirror. The brightness compensation component uses different brightness compensation functions based on whether the instantaneous scan phase is above or below a threshold. The threshold may correspond to a knee of a maximum laser power limit curve.
Abstract translation: 扫描投影仪包括亮度补偿分量。 亮度补偿分量将像素亮度修正为正弦扫描镜的瞬时扫描相位的函数。 亮度补偿组件根据瞬时扫描相位是否高于或低于阈值，使用不同的亮度补偿功能。 阈值可以对应于最大激光功率限制曲线的膝盖。
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公开(公告)号：US11579427B2
公开(公告)日：2023-02-14
申请号：US16160167
申请日：2018-10-15
Applicant: Microvision, Inc.
Inventor： Matthieu Saracco , Alga Lloyd Nothern, III , P. Selvan Viswanathan , James P. McGuire
Abstract: A non-imaging concentrator is employed in an upside down configuration in which light enters a smaller aperture and exits a larger aperture. The input angle of light rays may be as large as 180 degrees, while the maximum exit angle is limited to the acceptance angle of the non-imaging concentrator. A dichroic filter placed at the larger aperture has a maximum angle of incidence equal to the acceptance angle of the non-imaging concentrator.
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