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公开(公告)号：US20090090866A1
公开(公告)日：2009-04-09
申请号：US11668846
申请日：2007-01-30
申请人： Xu ZHANG , Joe WANG , Zhong-Wei CHEN
发明人： Xu ZHANG , Joe WANG , Zhong-Wei CHEN
CPC分类号： H01J37/244 , H01J37/28 , H01J2237/2443 , H01J2237/24435 , H01J2237/2445 , H01J2237/24465
摘要： A charged particle detector consists of four independent light guide modules assembled together to form a segmented on-axis annular detector, with a center opening for allowing the primary charged particle beam to pass through. One side of the assembly facing the specimen is coated with or bonded to scintillator material as the charged particle detection surface. Each light guide module is coupled to a photomultiplier tube to allow light signals transmitted through each light guide module to be amplified and processed separately. A charged particle detector is made from a single block of light guide material processed to have a cone shaped circular cutout from one face, terminating on the opposite face to an opening to allow the primary charged particle beam to pass through. The opposite face is coated with or bonded to scintillator material as the charged particle detection surface. The outer region of the light guide block is shaped into four separate light guide output channels and each light guide output channel is coupled to a photomultiplier tube to allow light signal output from each channel to be amplified and processed separately.
摘要翻译： 带电粒子检测器由四个独立的光导模块组成，组合在一起以形成分段的轴上环形探测器，其中心开口允许初级带电粒子束通过。 面向样品的组件的一侧作为带电粒子检测表面涂覆或结合到闪烁体材料。 每个光导模块耦合到光电倍增管，以允许通过每个光导模块传输的光信号被单独放大和处理。 带电粒子检测器由一块光导材料制成，被处理成具有从一个面的锥形圆形切口，终止在与开口相对的面上以允许初级带电粒子束通过。 相反的面被涂覆或与闪烁体材料结合，作为带电粒子检测表面。 导光块的外部区域被成形为四个分开的光导输出通道，并且每个光导输出通道耦合到光电倍增管，以允许来自每个通道的光信号输出被单独放大和处理。
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公开(公告)号：US12019188B2
公开(公告)日：2024-06-25
申请号：US16806150
申请日：2020-03-02
申请人： Microvision, Inc.
IPC分类号： G01S7/484 , G01S7/481 , G01S17/931
CPC分类号： G01S7/484 , G01S7/4817 , G01S17/931
摘要： An eye-safe light detection and ranging system includes a virtual protective housing. A short range pulse is emitted at every measurement point in a field of view before conditionally emitting a long range pulse. Short range pulses result in accessible emissions that are eye-safe at short distances and long range pulses result in accessible emissions that are eye-safe at longer distances.
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公开(公告)号：US20240118393A1
公开(公告)日：2024-04-11
申请号：US18045652
申请日：2022-10-11
申请人： Microvision, Inc.
发明人： Barton Plimmer , Jonathan Cross , Warren Scott
IPC分类号： G01S7/484 , G01S7/481 , G01S7/4865 , G01S17/894
CPC分类号： G01S7/484 , G01S7/4814 , G01S7/4817 , G01S7/4865 , G01S17/894
摘要： The embodiments described herein provide systems and methods that can improve performance in scanning laser devices. Specifically, the systems and methods emit emission control pulse sets that are used to detect when objects (e.g., persons) are within a relatively close safety range. Then, higher energy long-range pulse sets are conditionally emitted only when objects were not detected within the safety range with the emission control pulse sets. These emission control pulse sets are emitted variable timing and/or variable energy that is determined at least in part on whether previous emission control pulse sets detected an object with the safety range. The use of emission control pulse sets with variable timing and/or variable energy can provide for improved reliability of object detection in a safety range, while still meeting the energy limits needed for eye safety.
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公开(公告)号：US11892569B2
公开(公告)日：2024-02-06
申请号：US16815331
申请日：2020-03-11
申请人： Microvision, Inc.
发明人： Hanno Holzhüter
IPC分类号： G01S7/4865 , G01S17/931 , G01S17/10
CPC分类号： G01S7/4866 , G01S17/10 , G01S17/931
摘要： A method for optical distance measurement is suggested which comprises executing at least one time-of-flight measurement, wherein a time-of-flight measurement comprises transmitting at least one measuring pulse by means of a transmission unit, reflecting at least one transmitted measuring pulse and receiving at least one reflected measuring pulse by means of a reception unit. The method further comprises generating a backscatter curve based on the time-of-flight measurement and evaluating the backscatter curve for object recognition.
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公开(公告)号：US11796649B2
公开(公告)日：2023-10-24
申请号：US17081223
申请日：2020-10-27
申请人： Microvision, Inc.
IPC分类号： G01S7/4865 , G01S17/931 , G01S17/10
CPC分类号： G01S7/4865 , G01S17/10 , G01S17/931
摘要： What is proposed is a method for optically measuring distances, in the case of which a first plurality of measuring pulses is emitted during a first measuring interval by means of a transmitting element of a transmitting unit at first emitting times, and wherein a second plurality of measuring pulses is emitted during a second measuring interval by means of the transmitting element of the transmitting unit at second emitting times. The method comprises the reception of reflected measuring pulses by means of a receiving element of a receiving unit assigned to the transmitting element at receiving times. The method further comprises the determining of a first amount of times-of-flight for each received measuring pulse, wherein the first amount of times-of-flight is determined by using the first emitting times.
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公开(公告)号：US11644550B2
公开(公告)日：2023-05-09
申请号：US16744430
申请日：2020-01-16
发明人： Wolfgang Birnbacher
IPC分类号： G01S7/4865 , G01S7/4861 , G01S17/08
CPC分类号： G01S7/4865 , G01S7/4861 , G01S17/08 , G01S7/4866
摘要： A method for optical distance measurement is suggested, wherein a first distribution of times-of-flight of light of detected photons of transmitted measurement pulses is determined, which is stored in a first memory area of a memory unit. The first distribution of times-of-flight of light is assigned to time intervals of a first plurality of time intervals and frequency portions of the first distribution above a predetermined cut-off frequency are reduced or suppressed by means of a low pass filter in a reduction step, so that a second distribution of times-of-flight of light is generated. The second distribution is assigned to time intervals of a second plurality of time intervals and the blocking frequency of the low pass filter is selected to be smaller than or equal to half of the reciprocal value of a smallest interval width of the second plurality of time intervals.
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公开(公告)号：US20220244358A1
公开(公告)日：2022-08-04
申请号：US17165017
申请日：2021-02-02
申请人： Microvision, Inc.
摘要： The embodiments described herein provide systems and methods that can facilitate increased detector sensitivity and reliability in a scanning laser device. Specifically, the systems and methods utilize detectors with multiple sensors that are configured to receive reflections of laser light pulses from objects within a scan field. These multiple sensors are configured to receive these reflections through the same optical assembly used to scan the laser light pulses out to the scan field. Furthermore, the multiple sensors are configured to at least partially cancel the effects of back reflections from within the optical assembly itself. The cancellation of the effects of back reflections from within the optical assembly can improve the sensitivity of the detector, particularly for the detection of low energy reflections of laser pulses from within the scan field.
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公开(公告)号：US20210270938A1
公开(公告)日：2021-09-02
申请号：US16806150
申请日：2020-03-02
申请人： Microvision, Inc.
IPC分类号： G01S7/484 , G01S7/481 , G01S17/931
摘要： An eye-safe light detection and ranging system includes a virtual protective housing. A short range pulse is emitted at every measurement point in a field of view before conditionally emitting a long range pulse. Short range pulses result in accessible emissions that are eye-safe at short distances and long range pulses result in accessible emissions that are eye-safe at longer distances.
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公开(公告)号：US20210088778A1
公开(公告)日：2021-03-25
申请号：US16579223
申请日：2019-09-23
申请人： Microvision, Inc.
摘要： A scanning laser projection system includes a virtual protective housing circuit to automatically reduce power levels of visible laser light pulses when necessary to render the laser projection system eye-safe. IR laser light pulses are scanned out in front of visible laser light pulses in a field of view, and emitted power of visible laser light pulses is modulated based on attributes of reflections of the IR laser light pulses.
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公开(公告)号：US20210033845A1
公开(公告)日：2021-02-04
申请号：US16525496
申请日：2019-07-29
申请人： Microvision, Inc.
发明人： Ellis Matthew
摘要： A light detection and ranging system includes synchronously scanning transmit and receive mirrors that scan a pulsed fanned laser beam in two dimensions. Imaging optics image a receive aperture onto an arrayed receiver that includes a plurality of light sensitive devices. Scanning mirror assemblies include stationary permanent magnets and MEMS devices with attached mirrors and conductive coils.
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