公开(公告)号：US20070295921A1

公开(公告)日：2007-12-27

申请号：US11810054

申请日：2007-06-04

Applicant: Frank Check

Inventor： Frank Check

IPC: G01J1/32

CPC classification number: G01J1/32 ,  G02B26/106 ,  H01S5/0612 ,  H01S5/0687

Abstract: The improved diffractive-based laser scanning system of the present invention monitors portions of the laser light beams generated by a laser light source (e.g., VLD) employed therein to generate a mode switching signal indicative of a shift in the characteristic wavelength of the laser light beams emitted from the laser light source. In response thereto, a temperature controller selectively heats (or cool) the laser light source to minimize and avoid such wavelength changes, thereby mitigating any potential problems caused by such wavelength changes (for example, unwanted beam distortion and signal processing errors as described above). Preferably, mode switching (e.g., change in characteristic wavelength of light emitted from the laser light source) is detected by monitoring a zeroth diffractive order beam produced by a diffractive element of the system. Moreover, temperature control of the laser light source is preferably accomplished using active heating elements (e.g., a heating resistor) and passive cooling elements (e.g., a heat sink) in thermal contact with the laser light source. In addition, temperature control of the laser light source is preferably accomplished over a heating range (between a minimum heat and maximum heat applied to the laser light source), whereby temperature within this range is approximated by a look-up table. Such a scheme may be implemented by an inexpensive microcontroller, which eliminates the costs for directly measuring the temperature of the laser light source thereby contributing further to a simple and cost-effective design.

Abstract translation: 本发明的改进的基于衍射的激光扫描系统监测由其中使用的激光源（例如，VLD）产生的激光束的部分，以产生表示激光的特征波长偏移的模式切换信号 从激光光源射出的光束。 响应于此，温度控制器选择性地加热（或冷却）激光光源以最小化并避免这种波长变化，从而减轻由这种波长变化（例如，如上所述的不期望的波束失真和信号处理错误）引起的任何潜在问题， 。 优选地，通过监视由系统的衍射元件产生的零级衍射光束来检测模式切换（例如，从激光光源发射的光的特征波长的变化）。 此外，激光光源的温度控制优选使用与激光光源热接触的主动加热元件（例如，加热电阻器）和被动冷却元件（例如，散热器）来实现。 此外，激光光源的温度控制优选在加热范围（施加到激光光源的最小热和最大热之间）之间实现，由此在该范围内的温度由查找表近似。 这种方案可以由廉价的微控制器实现，其消除了直接测量激光光源的温度的成本，从而进一步促成简单和成本有效的设计。

公开(公告)号：US07227115B2

公开(公告)日：2007-06-05

申请号：US10730874

申请日：2003-12-09

Applicant: Frank Check

Inventor： Frank Check

IPC: G01J1/32

CPC classification number: G01J1/32 ,  G02B26/106 ,  H01S5/0612 ,  H01S5/0687

Abstract: A diffractive-based laser scanning system of the present invention monitors portions of the laser light beams generated by a laser light source (e.g., VLD) employed therein to generate a mode switching signal indicative of a shift in the characteristic wavelength of the laser light beams emitted from the laser light source. In response thereto, a temperature controller selectively heats (or cool) the laser light source to minimize and avoid such wavelength changes, thereby mitigating any potential problems caused by such wavelength changes. Preferably, mode switching (e.g., change in characteristic wavelength of light emitted from the laser light source) is detected by monitoring a zeroth diffractive order beam produced by a diffractive element of the system. Moreover, temperature control of the laser light source is preferably accomplished using active heating elements (e.g., a heating resistor) and passive cooling elements (e.g., a heat sink) in thermal contact with the laser light source.

Abstract translation: 本发明的基于衍射的激光扫描系统监视由其中使用的激光源（例如，VLD）产生的激光束的部分，以产生表示激光束的特征波长偏移的模式切换信号 从激光光源发出。 响应于此，温度控制器选择性地加热（或冷却）激光光源以最小化并避免这种波长变化，从而减轻由这种波长变化引起的任何潜在问题。 优选地，通过监视由系统的衍射元件产生的零级衍射光束来检测模式切换（例如，从激光光源发射的光的特征波长的变化）。 此外，激光光源的温度控制优选使用与激光光源热接触的主动加热元件（例如，加热电阻器）和被动冷却元件（例如，散热器）来实现。

公开(公告)号：US07207492B2

公开(公告)日：2007-04-24

申请号：US10435606

申请日：2003-05-09

Applicant: Mark Lucera ,  Frank Check ,  C. Harry Knowles ,  Xiaoxun Zhu ,  LeRoy Dickson

Inventor： Mark Lucera ,  Frank Check ,  C. Harry Knowles ,  Xiaoxun Zhu ,  LeRoy Dickson

IPC: G06K7/10

CPC classification number: 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 ,  G07F11/002 ,  G07G1/0054

Abstract: The effects of paper/substrate noise are significantly reduced in multi-focal zone laser scanning systems by processing analog scan data signals with a scan data signal processor having a plurality of pass-band filters and amplifiers that are automatically selected for passing only the spectral components of an analog scan data signal produced when a bar code symbol is scanned at a particular focal zone in the laser scanning system. Two or more different pass-band filter structures can be provided for use in the scan data signal processor, wherein each pass-band filter structure is tuned to the spectral band associated with a particular focal zone in the laser scanning system. When a bar code symbol is scanned by a laser beam focused within the first focal zone or scanning range of the system, the pass-band filter structure associated with this focal zone or scanning range is automatically switched into operation. Only spectral components associated with the produced analog scan data signal and noise existing over this pass-band are allowed within the analog signal processor. By virtue of the present invention, first and second derivative signals can be generated and processed to produce a corresponding digital scan data signal for use in subsequent digitizing and decoe processing operations, without compromising system performance due to the destructive effects of thermal and substrate noise outside the spectral pass-band of interest for the bar code symbol being scanned.

Abstract translation: 通过用具有多个通带滤波器和放大器的扫描数据信号处理器处理模拟扫描数据信号，在多焦点区域激光扫描系统中，纸/衬底噪声的影响显着降低，这些扫描数据信号处理器被自动选择以仅通过光谱分量 当在激光扫描系统中的特定焦点区域扫描条形码符号时产生的模拟扫描数据信号。 可以提供两个或更多个不同的通带滤波器结构用于扫描数据信号处理器，其中每个通带滤波器结构被调谐到与激光扫描系统中的特定焦点区域相关联的光谱带。 当通过聚焦在系统的第一焦点区域或扫描范围内的激光束扫描条形码符号时，与该焦点区域或扫描范围相关联的通带滤波器结构被自动切换到操作中。 在模拟信号处理器内只允许与产生的模拟扫描数据信号相关联的频谱分量和存在于该通带上的噪声。 凭借本发明，可以产生和处理第一和第二导数信号以产生相应的数字扫描数据信号，以用于随后的数字化和解码处理操作，而不会由于外部的热和衬底噪声的破坏性影响而不损害系统性能 正在扫描的条形码符号感兴趣的光谱通带。

公开(公告)号：US06499661B1

公开(公告)日：2002-12-31

申请号：US09499529

申请日：2000-02-10

Applicant: Mark Lucera ,  Frank Check ,  C. Harry Knowles ,  Xiaoxun Zhu ,  LeRoy Dickson

Inventor： Mark Lucera ,  Frank Check ,  C. Harry Knowles ,  Xiaoxun Zhu ,  LeRoy Dickson

IPC: G06K710

CPC classification number: 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 ,  G07F11/002 ,  G07G1/0054

Abstract: The effects of paper/substrate noise are significantly reduced in multi-focal zone laser scanning systems by processing analog scan data signals with a scan data signal processor having a plurality of pass-band filters and amplifiers that are automatically selected for passing only the spectral components of an analog scan data signal produced when a bar code symbol is scanned at a particular focal zone in the laser scanning system. Two or more different pass-band filter structures can be provided for use in the scan data signal processor, wherein each pass-band filter structure is tuned to the spectral band associated with a particular focal zone in the laser scanning system. When a bar code symbol is scanned by a laser beam focused within the first focal zone or scanning range of the system, the pass-band filter structure associated with this focal zone or scanning range is automatically switched into operation. Only spectral components associated with the produced analog scan data signal and noise existing over this pass-band are allowed within the analog signal processor. By virtue of the present invention, first and second derivative signals can be generated and processed to produce a corresponding digital scan data signal for use in subsequent digitizing and decode processing operations, without compromising system performance due to the destructive effects of thermal and substrate noise outside the spectral pass-band of interest for the bar code symbol being scanned.

Abstract translation: 通过用具有多个通带滤波器和放大器的扫描数据信号处理器处理模拟扫描数据信号，在多焦点区域激光扫描系统中，纸/衬底噪声的影响显着降低，这些扫描数据信号处理器被自动选择以仅通过光谱分量 当在激光扫描系统中的特定焦点区域扫描条形码符号时产生的模拟扫描数据信号。 可以提供两个或更多个不同的通带滤波器结构用于扫描数据信号处理器，其中每个通带滤波器结构被调谐到与激光扫描系统中的特定焦点区域相关联的光谱带。 当通过聚焦在系统的第一焦点区域或扫描范围内的激光束扫描条形码符号时，与该焦点区域或扫描范围相关联的通带滤波器结构被自动切换到操作中。 在模拟信号处理器内只允许与产生的模拟扫描数据信号相关联的频谱分量和存在于该通带上的噪声。 凭借本发明，可以生成和处理第一和第二导数信号以产生相应的数字扫描数据信号，以用于随后的数字化和解码处理操作，而不会由于外部的热和衬底噪声的破坏性影响而不影响系统性能 正在扫描的条形码符号感兴趣的光谱通带。

公开(公告)号：US07534994B2

公开(公告)日：2009-05-19

申请号：US11810054

申请日：2007-06-04

Applicant: Frank Check

Inventor： Frank Check

IPC: H01J7/24

CPC classification number: G01J1/32 ,  G02B26/106 ,  H01S5/0612 ,  H01S5/0687

Abstract: A diffractive-based laser scanning system that monitors portions of the laser light beams generated by a laser light source (e.g., VLD) employed therein to generate a mode switching signal indicative of a shift in the characteristic wavelength of the laser light beams emitted from the laser light source. In response thereto, a temperature controller selectively heats or cools the laser light source to minimize and avoid such wavelength changes. Mode switching is detected by monitoring a zeroth diffractive order beam produced by a diffractive element of the system. Temperature control of the laser light source is accomplished using active heating elements and passive cooling elements in thermal contact with the laser light source. In addition, temperature control of the laser light source is preferably accomplished over a heating range, whereby temperature within this range is approximated by a look-up table.

Abstract translation: 基于衍射的激光扫描系统，其监测由其中使用的激光源（例如，VLD）产生的激光束的部分，以产生模式切换信号，该模式切换信号指示从所述激光光源发出的激光束的特征波长的偏移 激光光源。 响应于此，温度控制器选择性地加热或冷却激光光源以最小化并避免这种波长变化。 通过监测由系统的衍射元件产生的零级衍射光束来检测模式切换。 使用与激光光源热接触的主动加热元件和被动冷却元件来实现激光光源的温度控制。 此外，激光光源的温度控制优选在加热范围内实现，由此在该范围内的温度由查找表近似。

公开(公告)号：US20070001013A1

公开(公告)日：2007-01-04

申请号：US11443552

申请日：2006-05-30

Applicant: Frank Check ,  LeRoy Dickson ,  John Groot ,  Timothy Good

Inventor： Frank Check ,  LeRoy Dickson ,  John Groot ,  Timothy Good

IPC: G06K7/10

CPC classification number: 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

Abstract: A bioptical holographic laser scanning system employing a plurality of laser scanning stations about a holographic scanning disc having scanning facets with high and low elevation angle characteristics, as well as positive, negative and zero skew angle characteristics which strategically cooperate with groups of beam folding mirrors having optimized surface geometry characteristics. The system has an ultra-compact construction, ideally suited for space-constrained retail scanning environments, and generate a 3-D omnidirectional laser scanning pattern between the bottom and side scanning windows during system operation. The laser scanning pattern of the present invention comprises a complex of pairs of quasi-orthogonal laser scanning planes, which include a plurality of substantially-vertical laser scanning planes for reading bar code symbols having bar code elements (i.e. ladder-type bar code symbols) that are oriented substantially horizontal with respect to the bottom scanning window, and a plurality of substantially-horizontal laser scanning planes for reading bar code symbols having bar code elements (i.e. picket-fence type bar code symbols) that are oriented substantially vertical with respect to the bottom scanning window.

Abstract translation: 一种生物光学全息激光扫描系统，其采用围绕具有高和低仰角特征的扫描面的全息扫描盘的多个激光扫描站，以及正，负和零偏斜角特性，其与具有 优化的表面几何特征。 该系统具有超紧凑的结构，非常适合空间受限的零售扫描环境，并在系统操作期间在底部和侧面扫描窗口之间生成3-D全向激光扫描图案。 本发明的激光扫描图案包括准正交激光扫描平面对的复合体，其包括用于读取具有条形码元素的条形码符号的多个基本上垂直的激光扫描平面（即梯形条形码符号） 相对于底部扫描窗口取向为大致水平的多个基本上水平的激光扫描平面，用于读取具有相对于...的条形码元素（即，栅栏栅栏型条形码符号）的条形码符号 底部扫描窗口。

公开(公告)号：US06616040B1

公开(公告)日：2003-09-09

申请号：US09500871

申请日：2000-02-09

Applicant: Mark G. Lucera ,  Frank Check ,  C. Harry Knowles ,  Xiaoxun Zhu

Inventor： Mark G. Lucera ,  Frank Check ,  C. Harry Knowles ,  Xiaoxun Zhu

IPC: G06K710

CPC classification number: 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 ,  G07F11/002 ,  G07G1/0054 ,  H01M2/0222 ,  H01M2/0272 ,  H01M2/0275 ,  H01M4/06 ,  H01M4/42

Abstract: An analog scan data signal processor is disclosed, in which a time-domain non-linear substrate noise filter is provided before a first derivative signal generation stage so as to produce, as output, a substantially fixed zero-reference signal level whenever a signal level indicative of a bar code substrate is detected, and the signal level analog scan data signal, whenever a signal level indicative of a bar code element is detected. By virtue of the present invention, it is now possible to reduce the level of substrate noise signals within input analog scan data signals, prior to deriving first derivative signals for subsequent signal processing. Consequently, the accuracy of binary signal level detection within such analog scan data signal processors can be significantly improved, thereby improving the performance of bar code symbol reading systems within which such analog scan data signal processors are employed.

Abstract translation: 公开了一种模拟扫描数据信号处理器，其中在一阶导数信号产生级之前提供时域非线性衬底噪声滤波器，以便每当信号电平产生基本上固定的零参考信号电平时，作为输出 每当检测到指示条形码元素的信号电平时，检测到指示条形码基板的信号电平模拟扫描数据信号。 凭借本发明，在导出用于后续信号处理的一阶导数信号之前，现在可以降低输入模拟扫描数据信号内的衬底噪声信号的电平。 因此，可以显着地提高这种模拟扫描数据信号处理器内的二进制信号电平检测的精度，从而提高使用这种模拟扫描数据信号处理器的条形码符号读取系统的性能。

公开(公告)号：US06581835B1

公开(公告)日：2003-06-24

申请号：US09500874

申请日：2000-02-09

Applicant: Mark Lucera ,  Frank Check ,  C. Harry Knowles ,  Xiaoxun Zhu ,  LeRoy Dickson

Inventor： Mark Lucera ,  Frank Check ,  C. Harry Knowles ,  Xiaoxun Zhu ,  LeRoy Dickson

IPC: G06K710

CPC classification number: 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 ,  G07F11/002 ,  G07G1/0054

Abstract: A multi-focal zone laser scanning system for scanning bar code symbols having a minimum bar element width (MBW). The multi-focal zone laser scanning system comprises a laser beam producing device for producing a laser beam, and a laser beam scanning mechanism for scanning the laser beam so as to generate a laser scanning pattern having a plurality of different focal zones. In the system, the scanned laser beam has a minimum beam dimension (MBD) with each focal zone, and the ratio of the minimum beam dimension (MDB) within each focal zone to the minimum bar element width (MBW) of a scanned bar code symbol therewithin (i.e. MDB/MBW) is greater than or equal to 2.0. Consequently, less modulation of the laser scanning beam is required during scanning operations, and therefore, bar code symbols having narrower minimum bar element widths can be resolved.

Abstract translation: 一种用于扫描具有最小条形元素宽度（MBW）的条形码符号的多焦点区域激光扫描系统。 多焦点激光扫描系统包括用于产生激光束的激光束产生装置和用于扫描激光束以产生具有多个不同聚焦区域的激光扫描图案的激光束扫描机构。 在系统中，扫描的激光束具有每个焦点区域的最小光束尺寸（MBD），以及每个焦点区域内的最小光束尺寸（MDB）与扫描条形码的最小条形元素宽度（MBW）的比率 其中的符号（即MDB / MBW）大于或等于2.0。 因此，在扫描操作期间需要较少的激光扫描光束的调制，因此可以解决具有较窄的最小条形元件宽度的条形码符号。

公开(公告)号：US06494377B1

公开(公告)日：2002-12-17

申请号：US09500870

申请日：2000-02-09

Applicant: Mark Lucera ,  Frank Check ,  C. Harry Knowles ,  Xiaoxun Zhu

Inventor： Mark Lucera ,  Frank Check ,  C. Harry Knowles ,  Xiaoxun Zhu

IPC: G06K710

CPC classification number: G06K7/10871 ,  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 ,  G06K2207/1013 ,  G07G1/0054

Abstract: The effects of paper/substrate noise are significantly reduced in multi-focal zone laser scanning systems by processing analog scan data signals with a scan data signal processor having a plurality of pass-band filters and amplifiers that are automatically selected for passing only the spectral components of an analog scan data signal produced when a bar code symbol is scanned at a particular focal zone in the laser scanning system. Two or more different pass-band filter structures can be provided for use in the scan data signal processor, wherein each pass-band filter structure is tuned to the spectral band associated with a particular focal zone in the laser scanning system. When a bar code symbol is scanned by a laser beam focused within the first focal zone or scanning range of the system, the pass-band filter structure associated with this focal zone or scanning range is automatically switched into operation using control signals derived by computing the beam spot speed of the laser beam at each moment of operation. Only spectral components associated with the produced analog scan data signal and noise existing over this pass-band are allowed within the analog signal processor. By virtue of the present invention, first and second derivative signals can be generated and processed to produce a corresponding digital scan data signal for use in subsequent digitizing and decode processing operations, without compromising system performance due to the destructive effects of thermal and substrate noise outside the spectral pass-band of interest for the bar code symbol being scanned.

Abstract translation: 通过用具有多个通带滤波器和放大器的扫描数据信号处理器处理模拟扫描数据信号，在多焦点区域激光扫描系统中，纸/衬底噪声的影响显着降低，这些扫描数据信号处理器被自动选择以仅通过光谱分量 当在激光扫描系统中的特定焦点区域扫描条形码符号时产生的模拟扫描数据信号。 可以提供两个或更多个不同的通带滤波器结构用于扫描数据信号处理器，其中每个通带滤波器结构被调谐到与激光扫描系统中的特定焦点区域相关联的光谱带。 当通过聚焦在系统的第一焦点区域或扫描范围内的激光束扫描条形码符号时，与该聚焦区域或扫描范围相关联的通带滤波器结构自动切换到使用通过计算 在每个操作时刻的激光束的光点速度。 在模拟信号处理器内只允许与产生的模拟扫描数据信号相关联的频谱分量和存在于该通带上的噪声。 凭借本发明，可以生成和处理第一和第二导数信号以产生相应的数字扫描数据信号，以用于随后的数字化和解码处理操作，而不会由于外部的热和衬底噪声的破坏性影响而不影响系统性能 正在扫描的条形码符号感兴趣的光谱通带。

公开(公告)号：US07407103B2

公开(公告)日：2008-08-05

申请号：US11443552

申请日：2006-05-30

Applicant: Frank Check ,  LeRoy Dickson ,  John Groot ,  Timothy Good

Inventor： Frank Check ,  LeRoy Dickson ,  John Groot ,  Timothy Good

IPC: G06K7/10

CPC classification number: 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

Abstract: A bioptical holographic laser scanning system employing a plurality of laser scanning stations about a holographic scanning disc having scanning facets with high and low elevation angle characteristics, as well as positive, negative and zero skew angle characteristics which strategically cooperate with groups of beam folding mirrors having optimized surface geometry characteristics. The system has an ultra-compact construction, ideally suited for space-constrained retail scanning environments, and generate a 3-D omnidirectional laser scanning pattern between the bottom and side scanning windows during system operation. The laser scanning pattern of the present invention comprises a complex of pairs of quasi-orthogonal laser scanning planes, which include a plurality of substantially-vertical laser scanning planes for reading bar code symbols having bar code elements (i.e. ladder-type bar code symbols) that are oriented substantially horizontal with respect to the bottom scanning window, and a plurality of substantially-horizontal laser scanning planes for reading bar code symbols having bar code elements (i.e. picket-fence type bar code symbols) that are oriented substantially vertical with respect to the bottom scanning window.

Abstract translation: 一种生物光学全息激光扫描系统，其采用围绕具有高和低仰角特征的扫描面的全息扫描盘的多个激光扫描站，以及正，负和零偏斜角特性，其与具有 优化的表面几何特征。 该系统具有超紧凑的结构，非常适合空间受限的零售扫描环境，并在系统操作期间在底部和侧面扫描窗口之间生成3-D全向激光扫描图案。 本发明的激光扫描图案包括准正交激光扫描平面对的复合体，其包括用于读取具有条形码元素的条形码符号的多个基本上垂直的激光扫描平面（即梯形条形码符号） 相对于底部扫描窗口取向为大致水平的多个基本上水平的激光扫描平面，用于读取具有相对于...的条形码元素（即，栅栏栅栏型条形码符号）的条形码符号 底部扫描窗口。