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1. 发明授权

US06705526B1 AUTOMATED METHOD OF AND SYSTEM FOR DIMENSIONING OBJECTS TRANSPORTED THROUGH A WORK ENVIRONMENT USING CONTOUR TRACING, VERTICE DETECTION, CORNER POINT DETECTION, AND CORNER POINT REDUCTION METHODS ON TWO-DIMENSIONAL RANGE DATA MAPS CAPTURED BY AN AMPLITUDE MODULATED LASER SCANNING BEAM 失效
标题翻译：用于通过使用轮廓跟踪，检验，角点检测和角点减少方法的尺寸对象的自动化方法和系统通过激光调制激光束捕获的二维范围数据的方法
公开(公告)号：US06705526B1
公开(公告)日：2004-03-16
申请号：US09667190
申请日：2000-09-21
申请人： Xiaoxun Zhu , Ka Man Au , Gennady Germaine , Timothy A. Good , Michael Schnee , Ian Scott , John Groot , David M. Wilz, Sr. , George B. Rockstein , Robert E. Blake , LeRoy Dickson , Carl Harry Knowles
发明人： Xiaoxun Zhu , Ka Man Au , Gennady Germaine , Timothy A. Good , Michael Schnee , Ian Scott , John Groot , David M. Wilz, Sr. , George B. Rockstein , Robert E. Blake , LeRoy Dickson , Carl Harry Knowles
IPC分类号： G06K710
CPC分类号： B82Y15/00 , G02B26/106 , G06K7/10 , G06K7/10564 , G06K7/10584 , G06K7/10594 , G06K7/10603 , G06K7/10663 , G06K7/10673 , G06K7/10693 , G06K7/10702 , G06K7/10792 , G06K7/10801 , G06K7/10811 , G06K7/10851 , G06K7/10861 , G06K7/10871 , G06K7/10881 , G06K7/10891 , G06K7/109 , G06K7/14 , G06K17/0022 , G06K2207/1013 , G07G1/0054 , H01L21/28575 , H01L29/452
摘要： A fully automated package identification and measuring system, in which an omni-directional holographic scanning tunnel is used to read bar codes on packages entering the tunnel, while a package dimensioning subsystem is used to capture information about the package prior to entry into the tunnel. Mathematical models are created on a real-time basis for the geometry of the package and the position of the laser scanning beam used to read the bar code symbol thereon. The mathematical models are analyzed to determine if collected and queued package identification data is spatially and/or temporally correlated with package measurement data using vector-based ray-tracing methods, homogeneous transformations, and object-oriented decision logic so as to enable simultaneous tracking of multiple packages being transported through the scanning tunnel.
摘要翻译：全自动包装识别和测量系统，其中使用全向全息扫描隧道来读取进入隧道的包装上的条形码，同时使用包装尺寸子系统在进入隧道之前捕获关于包装的信息。数学模型是为了封装的几何形状和用于读取其上的条形码符号的激光扫描光束的位置而实时创建的。对数学模型进行分析，以确定收集的和排队的包裹识别数据是否与包装测量数据在空间和/或时间上相关，使用基于矢量的光线跟踪方法，均匀变换和面向对象的决策逻辑，以便能够同时跟踪多个包裹通过扫描隧道传送。

2. 发明授权

US07344082B2 Automated method of and system for dimensioning objects over a conveyor belt structure by applying contouring tracing, vertice detection, corner point detection, and corner point reduction methods to two-dimensional range data maps of the space above the conveyor belt captured by an amplitude modulated laser scanning beam 失效
标题翻译：通过将调幅跟踪，顶点检测，角点检测和角点降低方法应用于由调幅激光器捕获的输送带上方的空间的二维范围数据图，通过传送带结构对物体进行尺寸化的自动化方法和系统扫描光束
公开(公告)号：US07344082B2
公开(公告)日：2008-03-18
申请号：US11294890
申请日：2005-12-05
申请人： Xiaoxun Zhu , Ka Man Au , Gennady Germaine , Timothy A. Good , Michael Schnee , Ian Scott , John Groot , David M. Wilz, Sr. , George B. Rockstein , Robert E. Blake , LeRoy Dickson , Carl Harry Knowles
发明人： Xiaoxun Zhu , Ka Man Au , Gennady Germaine , Timothy A. Good , Michael Schnee , Ian Scott , John Groot , David M. Wilz, Sr. , George B. Rockstein , Robert E. Blake , LeRoy Dickson , Carl Harry Knowles
IPC分类号： G06K7/10
CPC分类号： G06K7/14
摘要： A fully automated package identification and measuring system, in which an omni-directional holographic scanning tunnel is used to read bar codes on packages entering the tunnel, while a package dimensioning subsystem is used to capture information about the package prior to entry into the tunnel. Mathematical models are created on a real-time basis for the geometry of the package and the position of the laser scanning beam used to read the bar code symbol thereon. The mathematical models are analyzed to determine if collected and queued package identification data is spatially and/or temporally correlated with package measurement data using vector-based ray-tracing methods, homogeneous transformations, and object-oriented decision logic so as to enable simultaneous tracking of multiple packages being transported through the scanning tunnel.
摘要翻译：全自动包装识别和测量系统，其中使用全向全息扫描隧道来读取进入隧道的包装上的条形码，同时使用包装尺寸子系统在进入隧道之前捕获关于包装的信息。数学模型是为了封装的几何形状和用于读取其上的条形码符号的激光扫描光束的位置而实时创建的。对数学模型进行分析，以确定收集的和排队的包裹识别数据是否与包装测量数据在空间和/或时间上相关，使用基于矢量的光线跟踪方法，均匀变换和面向对象的决策逻辑，以便能够同时跟踪多个包裹通过扫描隧道传送。

3. 发明授权

US06971580B2 AUTOMATED METHOD OF AND SYSTEM FOR DIMENSIONING OBJECTS OVER A CONVEYOR BELT STRUCTURE BY APPLYING CONTOURING TRACING, VERTICE DETECTION, CORNER POINT DETECTION, AND CORNER POINT REDUCTION METHODS TO TWO-DIMENSIONAL RANGE DATA MAPS OF THE SPACE ABOVE THE CONVEYOR BELT CAPTURED BY AN AMPLITUDE MODULATED LASER SCANNING BEAM 失效
标题翻译：用于通过应用轮廓跟踪，输入检测，角点检测以及角点减小方法对输送带结构进行尺寸化的方法和系统的自动化方法和方法用于通过放大器调制激光捕获的输送带上的空间的二维范围数据的方法扫描光束
公开(公告)号：US06971580B2
公开(公告)日：2005-12-06
申请号：US10038727
申请日：2002-01-02
申请人： Xiaoxun Zhu , Ka Man Au , Gennady Germaine , Timothy A. Good , Michael Schnee , Ian Scott , John Groot , David M. Wilz, Sr. , George B. Rockstein , Robert E. Blake , LeRoy Dickson , Carl Harry Knowles
发明人： Xiaoxun Zhu , Ka Man Au , Gennady Germaine , Timothy A. Good , Michael Schnee , Ian Scott , John Groot , David M. Wilz, Sr. , George B. Rockstein , Robert E. Blake , LeRoy Dickson , Carl Harry Knowles
IPC分类号： G02B26/10 , G06K7/10 , G06K7/14 , G06K17/00 , G07G1/00 , H01L21/285 , H01L29/45
CPC分类号： B82Y15/00 , G01S7/4817 , G01S7/4818 , G01S17/58 , G01S17/88 , G01S17/89 , G02B26/106 , G06K7/10 , G06K7/10564 , G06K7/10584 , G06K7/10594 , G06K7/10603 , G06K7/10663 , G06K7/10673 , G06K7/10693 , G06K7/10702 , G06K7/10722 , G06K7/10792 , G06K7/10801 , G06K7/10811 , G06K7/10851 , G06K7/10861 , G06K7/10871 , G06K7/10881 , G06K7/10891 , G06K7/109 , G06K7/14 , G06K17/0022 , G06K2207/1013 , G07F11/002 , G07G1/0054 , H01L21/28575 , H01L29/452
摘要： A fully automated package identification and measuring system, in which an omni-directional holographic scanning tunnel is used to read bar codes on packages entering the tunnel, while a package dimensioning subsystem is used to capture information about the package prior to entry into the tunnel. Mathematical models are created on a real-time basis for the geometry of the package and the position of the laser scanning beam used to read the bar code symbol thereon. The mathematical models are analyzed to determine if collected and queued package identification data is spatially and/or temporally correlated with package measurement data using vector-based ray-tracing methods, homogeneous transformations, and object-oriented decision logic so as to enable simultaneous tracking of multiple packages being transported through the scanning tunnel.
摘要翻译：全自动包装识别和测量系统，其中使用全向全息扫描隧道来读取进入隧道的包装上的条形码，同时使用包装尺寸子系统在进入隧道之前捕获关于包装的信息。数学模型是为了封装的几何形状和用于读取其上的条形码符号的激光扫描光束的位置而实时创建的。对数学模型进行分析，以确定收集的和排队的包裹识别数据是否与包装测量数据在空间和/或时间上相关，使用基于矢量的光线跟踪方法，均匀变换和面向对象的决策逻辑，以便能够同时跟踪多个包裹通过扫描隧道传送。

4. 发明申请

US20060151604A1 Automated method of and system for dimensioning objects over a conveyor belt structure by applying contouring tracing, vertice detection, corner point detection, and corner point reduction methods to two-dimensional range data maps of the space above the conveyor belt captured by an amplitude modulated laser scanning beam 失效
公开(公告)号：US20060151604A1
公开(公告)日：2006-07-13
申请号：US11294890
申请日：2005-12-05
申请人： Xiaoxun Zhu , Ka Au , Gennady Germaine , Timothy Good , Michael Schnee , Ian Scott , John Groot , David Wilz , George Rockstein , Robert Blake , LeRoy Dickson , Carl Knowles
发明人： Xiaoxun Zhu , Ka Au , Gennady Germaine , Timothy Good , Michael Schnee , Ian Scott , John Groot , David Wilz , George Rockstein , Robert Blake , LeRoy Dickson , Carl Knowles
IPC分类号： G06K7/10
CPC分类号： G06K7/14
摘要： A fully automated package identification and measuring system, in which an omni-directional holographic scanning tunnel is used to read bar codes on packages entering the tunnel, while a package dimensioning subsystem is used to capture information about the package prior to entry into the tunnel. Mathematical models are created on a real-time basis for the geometry of the package and the position of the laser scanning beam used to read the bar code symbol thereon. The mathematical models are analyzed to determine if collected and queued package identification data is spatially and/or temporally correlated with package measurement data using vector-based ray-tracing methods, homogeneous transformations, and object-oriented decision logic so as to enable simultaneous tracking of multiple packages being transported through the scanning tunnel.

5. 发明授权

US06561424B1 Method of and system for automatically identifying packages during package transport operations carried out by a human operator walking through the doorway of a storage warehouse 失效
标题翻译：在行人通过仓库的门口执行的包裹运输操作期间自动识别包裹的方法和系统
公开(公告)号：US06561424B1
公开(公告)日：2003-05-13
申请号：US09479780
申请日：2000-01-07
申请人： LeRoy Dickson , John Groot , Carl Harry Knowles , Thomas Amundsen
发明人： LeRoy Dickson , John Groot , Carl Harry Knowles , Thomas Amundsen
IPC分类号： G06K710
CPC分类号： B82Y15/00 , G02B26/10 , G02B26/106 , G06K7/10 , G06K7/10564 , G06K7/10584 , G06K7/10594 , G06K7/10603 , G06K7/10663 , G06K7/10673 , G06K7/10693 , G06K7/10702 , G06K7/10792 , G06K7/10801 , G06K7/10811 , G06K7/10851 , G06K7/10861 , G06K7/10871 , G06K7/10881 , G06K7/10891 , G06K7/109 , G06K7/14 , G06K17/0022 , G06K2207/1012 , G06K2207/1013 , G06K2207/1016 , G06K2207/1017 , G06K2207/1018 , G07F11/002 , G07G1/0045 , G07G1/0054
摘要： A method of and system for automatically identifying packages during package transport operations carried out by a human operator walking through the doorway of a storage warehouse, wherein, a laser scanning system is supported above the doorway defining a passageway of 3-D spatial extent, through which a human operator may walk while manually transporting packages bearing bar code symbols. In the illustrative embodiment, the laser scanning system includes a housing having a light transmission aperture, and a laser scanning pattern generator disposed within the housing. During operation of the system, the laser scanning pattern generator employs a holographic scanning disc to project through the light transmission aperture, an omnidirectional laser scanning pattern which is substantially confined within the spatial extent of a predefined 3-D scanning volume that spatially encompasses a substantial portion of the passageway of 3-D spatial extent. As each package bearing a bar code symbol is transported through the doorway as the human operator walks through the doorway, the package is automatically identified by the laser scanning system supported above the doorway. By virtue of the present invention, a bar coded package can now be automatically identified as a human operator holding the package walks through the doorway of a storage warehouse, thus improving inventory control accuracy and worker productivity.
摘要翻译：一种用于在由仓库运行的人员执行的包裹运输操作期间自动识别包裹的方法和系统，其中，激光扫描系统支撑在门口上方，限定3-D空间范围的通道，通过人工操作者可以在手动运送带有条形码符号的包装的情况下行走。在说明性实施例中，激光扫描系统包括具有光传输孔的壳体和设置在壳体内的激光扫描图案发生器。在该系统的操作期间，激光扫描图案发生器采用全息扫描盘来突出通过光传输孔径，全向激光扫描图案基本上限制在预定义的3-D扫描体积的空间范围内，该空间范围在空间上包含实质的 3-D空间范围的通道部分。当操作人员走过门口时，带有条形码符号的每个包装都通过门口输送，该包装由支撑在门口上方的激光扫描系统自动识别。根据本发明，现在可以自动识别条形码包装，作为保持包装的人员操纵通过仓库的门口，从而提高库存控制精度和工作人员的生产率。

6. 发明授权

US06439462B1 Conveyor-belt mounted bar code symbol reading system employing a steerable bar code symbol scanner to automatically scan bar code symbols detected by a holographic-based bar code position detector 失效
标题翻译：输送带安装的条形码符号读取系统，采用可转向条形码符号扫描器自动扫描由基于全息的条形码位置检测器检测的条形码符号
公开(公告)号：US06439462B1
公开(公告)日：2002-08-27
申请号：US09252255
申请日：1999-02-18
申请人： LeRoy Dickson , John Groot , Carl Harry Knowles , Thomas Amundsen
发明人： LeRoy Dickson , John Groot , Carl Harry Knowles , Thomas Amundsen
IPC分类号： G06K710
CPC分类号： B82Y15/00 , G02B26/10 , G02B26/106 , G06K7/10 , G06K7/10564 , G06K7/10584 , G06K7/10594 , G06K7/10603 , G06K7/10663 , G06K7/10673 , G06K7/10693 , G06K7/10702 , G06K7/10792 , G06K7/10801 , G06K7/10811 , G06K7/10851 , G06K7/10861 , G06K7/10871 , G06K7/10881 , G06K7/10891 , G06K7/109 , G06K7/14 , G06K17/0022 , G06K2207/1012 , G06K2207/1013 , G06K2207/1016 , G06K2207/1017 , G06K2207/1018 , G07F11/002 , G07G1/0045 , G07G1/0054
摘要： An automatic bar code symbol reading system for automatically reading bar code symbols on packages transported along a conveyor belt through a 3-D scanning volume. The system includes a holographic-based bar code symbol detector and a bar code symbol scanner mounted above the conveyor belt. The holographic-based bar code position detector produces a first laser scanning pattern within the 3-D scanning volume, and scans each transported package, detects the position of the bar code symbol therein, and automatically produces bar code position data specifying the position of the detected bar code symbol. In automatic response to the produced bar code position data, the bar code symbol scanner is steered so as to collect light reflected off the detected bar code symbol, and produce scan data indicative of the detected bar code symbol. A scan data processor automatically processes the produced scan data so as to automatically read the detected bar code symbol and produce symbol character data representative thereof. By virtue of the present invention, it is now possible automatically detect the position of high-resolution bar code symbols on packages transported through a large 3-D scanning volume using a holographic-based bar code position detector, and collect high-resolution scan data from the detected bar code symbol using a steerable high-speed bar code symbol scanner, so that such collected scan data can then be subsequently decode processed in a high-speed manner, as required in numerous industrial scanning applications.
摘要翻译：一种自动条形码符号读取系统，用于通过3-D扫描体积自动读取沿传送带传送的包装上的条形码符号。该系统包括基于全息的条形码符号检测器和安装在传送带上方的条形码符号扫描仪。基于全息的条形码位置检测器在3-D扫描体积内产生第一激光扫描图案，并扫描每个传送的包装，检测其中的条形码符号的位置，并且自动产生指定该位置的条形码位置数据检测到条形码符号。在对所产生的条形码位置数据的自动响应中，条形码符号扫描器被转向以收集从检测到的条形码符号反射的光，并产生指示检测到的条形码符号的扫描数据。扫描数据处理器自动处理所产生的扫描数据，以便自动读取检测到的条形码符号并产生代表其的符号字符数据。凭借本发明，现在可以利用基于全息的条形码位置检测器自动检测通过大的3-D扫描体积传送的包裹上的高分辨率条形码符号的位置，并且收集高分辨率扫描数据从检测到的条形码符号使用可操纵的高速条形码符号扫描器，使得随后可以按照许多工业扫描应用中的要求以高速方式对这样收集的扫描数据进行解码处理。

7. 发明授权

US06199759B1 Bar code symbol scanning system having a holographic laser scanning disc utilizing maximum light collection surface area thereof and having scanning facets with optimized light collection efficiency 失效
标题翻译：具有全息激光扫描盘的条形码符号扫描系统，该全息激光扫描盘利用其最大光收集表面积并具有优化的光收集效率的扫描小面
公开(公告)号：US06199759B1
公开(公告)日：2001-03-13
申请号：US08941781
申请日：1997-09-30
申请人： Leroy Dickson , John Groot , Carl Harry Knowles , Thomas Amundsen
发明人： Leroy Dickson , John Groot , Carl Harry Knowles , Thomas Amundsen
IPC分类号： A06N710
CPC分类号： G06K7/10871 , G02B26/10 , G02B26/106 , G06K7/10 , G06K7/10564 , G06K7/10584 , G06K7/10594 , G06K7/10603 , G06K7/10663 , G06K7/10673 , G06K7/10693 , G06K7/10702 , G06K7/10792 , G06K7/10801 , G06K7/10811 , G06K7/10851 , G06K7/10861 , G06K7/10881 , G06K7/10891 , G06K7/109 , G06K7/14 , G06K17/0022 , G06K2207/1012 , G06K2207/1013 , G06K2207/1016 , G06K2207/1017 , G06K2207/1018 , G07F11/002 , G07G1/0045 , G07G1/0054
摘要： A bar code symbol scanning system having a holographic laser scanning disc utilizing maximum light collection surface area thereof and having scanning facets with optimized light collection efficiency. The holographic scanning disc has a plurality of holographic optical elements for scanning a laser beam and producing a laser scanning pattern for scanning code symbols. Each holographic optical element being supported on a support disc between the inner and outer perimeters thereof, and each has a surface area for carrying out light collecting operations and at least a portion of the surface area is disposed adjacent the outer perimeter of the support disc for carrying out laser beam scanning operations. The sum of all of the facet surface areas of the plurality of said holographic optical elements is substantially equal to the surface area of the available light collecting region of the support disc.
摘要翻译：一种条形码符号扫描系统，其具有利用其最大光收集表面积并且具有优化的光收集效率的扫描小面的全息激光扫描盘。全息扫描盘具有多个全息光学元件，用于扫描激光束并产生用于扫描代码符号的激光扫描图案。每个全息光学元件被支撑在其内周和外周之间的支撑盘上，并且每个具有用于进行聚光操作的表面区域，并且至少一部分表面区域邻近支撑盘的外周设置，进行激光束扫描操作。多个所述全息光学元件的所有小面表面积的总和基本上等于支撑盘的可用光收集区域的表面积。

8. 发明授权

US6073846A Holographic laser scanning system and process and apparatus and method 失效
标题翻译：全息激光扫描系统及其设备及方法
公开(公告)号：US6073846A
公开(公告)日：2000-06-13
申请号：US726522
申请日：1996-10-07
申请人： LeRoy Dickson , John Groot , Carl Harry Knowles , Thomas Amundsen
发明人： LeRoy Dickson , John Groot , Carl Harry Knowles , Thomas Amundsen
IPC分类号： G02B26/10 , G06K7/10 , G06K7/14 , G06K17/00 , G07G1/00
CPC分类号： B82Y15/00 , G02B26/10 , G02B26/106 , G06K17/0022 , G06K7/10 , G06K7/10564 , G06K7/10584 , G06K7/10594 , G06K7/10603 , G06K7/10663 , G06K7/10673 , G06K7/10693 , G06K7/10702 , G06K7/10792 , G06K7/10801 , G06K7/10811 , G06K7/10851 , G06K7/10861 , G06K7/10871 , G06K7/10881 , G06K7/10891 , G06K7/109 , G06K7/14 , G07F11/002 , G07G1/0045 , G07G1/0054 , G06K2207/1012 , G06K2207/1013 , G06K2207/1016 , G06K2207/1017 , G06K2207/1018
摘要： A holographic laser scanning system employing laser beam production module with optical components geometrically constrained so as to be capable of producing a laser scanning beam having a controlled beam aspect-ratio substantially reduced astigmatism and minimal dispersion during laser beam scanning operations.
摘要翻译：一种全息激光扫描系统，其采用具有几何约束的光学部件的激光束产生模块，以便能够产生具有受激光束纵横比的基本上减小的散光和激光束扫描操作期间最小色散的激光扫描光束。

9. 发明授权

US06523750B1 Laser scanning system employing light collection surfaces having optical axes disposed off the bragg angle of the holographic optical elements of the holographic scanning disc thereof 失效
标题翻译：激光扫描系统采用具有放置在其全息扫描盘的全息光学元件的布拉格角的光轴的光收集表面
公开(公告)号：US06523750B1
公开(公告)日：2003-02-25
申请号：US09440560
申请日：1999-11-15
申请人： LeRoy Dickson , John Groot , Carl Harry Knowles , Thomas Amundsen
发明人： LeRoy Dickson , John Groot , Carl Harry Knowles , Thomas Amundsen
IPC分类号： G06K0710
CPC分类号： B82Y15/00 , G02B26/10 , G02B26/106 , G06K7/10 , G06K7/10564 , G06K7/10584 , G06K7/10594 , G06K7/10603 , G06K7/10663 , G06K7/10673 , G06K7/10693 , G06K7/10702 , G06K7/10792 , G06K7/10801 , G06K7/10811 , G06K7/10851 , G06K7/10861 , G06K7/10871 , G06K7/10881 , G06K7/10891 , G06K7/109 , G06K7/14 , G06K17/0022 , G06K2207/1012 , G06K2207/1013 , G06K2207/1016 , G06K2207/1017 , G06K2207/1018 , G07F11/002 , G07G1/0045 , G07G1/0054
摘要： A holographic laser scanning system for scanning bar code symbols. The system comprises a holographic scanning disc having a plurality of holographic optical elements disposed thereon for scanning the plurality of laser beams directed at the same incident angle. Each holographic optical element as substantially the same Bragg angle. The parabolic light reflective surfaces are disposed beneath the holographic scanning discs. Each parabolic light reflective surface has an optical axis disposed off the Bragg angle of the holographic optical elements, for focusing towards a focal point above the holographic scanning disc, the reflected light rays collected by each holographic optical element. A photodetector is disposed at the focal point of the corresponding parabolic light reflective surface above the holographic scanning disc, and is radially aligned with the optical axis of one parabolic light reflective surface. The light diffraction efficiency of each holographic optical element at the angle of incidence of each laser beam during scanning is substantially greater than the light diffraction efficiency of the focused laser light transmitted from each parabolic light reflective surface through the holographic optical elements towards corresponding photodetector during light detection. This enables the collected light rays, focused by the parabolic light reflective surface, to be efficiently transmitted through the holographic optical elements, to the photodetector for detection and generation of a scan data signal for subsequent processing. By virtue of this novel arrangement, the present invention enables the construction of a holographic laser scanner having substantially reduced height characteristics.
摘要翻译：一种用于扫描条形码符号的全息激光扫描系统。该系统包括全息扫描盘，其具有设置在其上的多个全息光学元件，用于扫描以相同入射角度指向的多个激光束。每个全息光学元件作为基本相同的布拉格角。抛物面光反射表面设置在全息扫描盘下方。每个抛物面光反射表面具有离开全息光学元件的布拉格角的光轴，用于聚焦到全息扫描盘上方的焦点，由每个全息光学元件收集的反射光线。光电检测器设置在全息扫描盘上方的相应的抛物线反光表面的焦点处，并且与一个抛物面光反射表面的光轴径向对准。每个全息光学元件在扫描期间每个激光束的入射角的光衍射效率基本上大于从每个抛物面光反射表面通过全息光学元件在光照期间相对于光电检测器传输的聚焦激光的光衍射效率检测。这使得由抛物面光反射表面聚焦的收集的光线能够被有效地透过全息光学元件传输到光电检测器，用于检测和产生用于后续处理的扫描数据信号。凭借这种新颖的布置，本发明能够构建具有基本上降低的高度特性的全息激光扫描仪。

10. 发明授权

US06474556B2 Laser scanning system mounted over a conveyor belt along which packages bearing bar code symbols are transported and scanned 失效
标题翻译：激光扫描系统安装在输送带上，沿着该传送带承载条形码符号的传送和扫描
公开(公告)号：US06474556B2
公开(公告)日：2002-11-05
申请号：US09251674
申请日：1999-02-17
申请人： LeRoy Dickson , John Groot , Carl Harry Knowles , Thomas Amundsen
发明人： LeRoy Dickson , John Groot , Carl Harry Knowles , Thomas Amundsen
IPC分类号： G06K710
CPC分类号： B82Y15/00 , G02B26/10 , G02B26/106 , G06K7/10 , G06K7/10564 , G06K7/10584 , G06K7/10594 , G06K7/10603 , G06K7/10663 , G06K7/10673 , G06K7/10693 , G06K7/10702 , G06K7/10792 , G06K7/10801 , G06K7/10811 , G06K7/10851 , G06K7/10861 , G06K7/10871 , G06K7/10881 , G06K7/10891 , G06K7/109 , G06K7/14 , G06K17/0022 , G06K2207/1012 , G06K2207/1013 , G06K2207/1016 , G06K2207/1017 , G06K2207/1018 , G07F11/002 , G07G1/0045 , G07G1/0054
摘要： An over-the-conveyor bar code symbol reading system for scanning bar coded packages transported through a 3-D scanning volume having a plurality of focal planes. The system comprises a conveyor belt, first and second laser scanning subsystems mounted thereabove, and a scan data processor. The first laser scanning subsystem generates a first laser scanning pattern above the conveyor belt for scanning each bar coded package transported therealong, and produces bar code position data indicative of the position of the bar code symbol on each scanned package. The second laser scanning subsystem generates and scans a second laser beam to produce a second laser scanning pattern within a 3-D scanning volume above the conveyor belt and having a plurality of focal planes. In response to scanning the transported package, the second laser scanning subsystem produces scan data indicative of the scanned bar code symbol thereon. This scan data is processed to detect each scanned bar code symbol and determine within which one of the plurality of focal planes the detected bar code symbol resides on the transported package. During operation of the system, produced bar code position data is used to automatically set the focal length of the first laser beam to spatially coincide with the focal plane within which the detected bar code symbol resides on the transported package. By virtue of the present invention, bar coded packages of varying height can now be read using a system having reduced complexity and greater compactness for mounting above space-restricted conveyor belts.
摘要翻译：一种用于扫描通过具有多个焦平面的3-D扫描体积传送的条形编码包的输送机条形码符号读取系统。该系统包括传送带，安装在其上的第一和第二激光扫描子系统以及扫描数据处理器。第一激光扫描子系统在传送带上方产生第一激光扫描图案，用于扫描沿其传送的每个条形编码包，并产生指示每个扫描包装上的条形码符号的位置的条形码位置数据。第二激光扫描子系统产生并扫描第二激光束以在传送带上方的3-D扫描体积内产生第二激光扫描图案并具有多个焦平面。响应于扫描传送的包装，第二激光扫描子系统产生指示其上扫描的条形码符号的扫描数据。处理该扫描数据以检测每个扫描的条形码符号，并确定检测到的条形码符号驻留在传送的包装上的多个焦平面中的哪一个。在系统操作期间，使用产生的条形码位置数据来自动设置第一激光束的焦距，使空间上与检测到的条形码符号位于传送包装上的焦平面重合。凭借本发明，现在可以使用具有降低的复杂性并且用于安装在空间受限的传送带上方的更紧凑性的系统来读取具有不同高度的条形编码包装。

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