公开(公告)号：US06840449B2

公开(公告)日：2005-01-11

申请号：US10299726

申请日：2002-11-20

Applicant: Frank Check ,  LeRoy Dickson ,  John Groot ,  C. Harry Knowles

Inventor： Frank Check ,  LeRoy Dickson ,  John Groot ,  C. Harry Knowles

IPC: G02B26/10 ,  G06K7/10 ,  G06K7/14 ,  G06K17/00 ,  G06Q10/08 ,  G07G1/00

CPC classification number: G06K7/10871 ,  G02B5/32 ,  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 ,  G06K2207/1016 ,  G06K2207/1017 ,  G06K2207/1018 ,  G06Q10/087 ,  G07F11/002 ,  G07G1/0045 ,  G07G1/0054

Abstract: A holographic laser scanner of ultra-compact design capable of reading bar and other types of graphical indicia within a large scanning volume using holographic optical elements and visable laser diodes. The holographic optical elements are arranged on the scanning disc in such a manner so that none of the laser scanning planes generated within the 3-D scanning volume of the system are spatially and temporally coincident with any other laser scanning plane within the 3-D scanning volume. This novel feature of the present invention ensures that there is substantially zero cross-talk at the plurality of photodetectors provided within the system, significantly improving the performance of the system.

Abstract translation: 一种超紧凑设计的全息激光扫描仪，能够使用全息光学元件和可见激光二极管在大扫描体积内读取条和其他类型的图形标记。 全息光学元件以这样的方式布置在扫描盘上，使得在系统的3-D扫描体积内产生的激光扫描平面在3D扫描内的空间和时间上与任何其它激光扫描平面不一致 卷。 本发明的这个新颖特征确保了在系统内提供的多个光电探测器上基本上没有串扰，从而显着提高了系统的性能。

公开(公告)号：US06572018B1

公开(公告)日：2003-06-03

申请号：US09500875

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: 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: A scan data signal processor is disclosed for use with a laser scanning system having a plurality of different focal zones within which a laser scanning beam is scanned across one or more bar code symbols and an analog scan data signal is automatically produced. The scan data signal processor comprises a first and second derivative signal generation stages, a second-derivative zero-crossing detector, a real-time bar code element detector, and a control logic circuitry. The first derivative signal generation stage derives a first derivative signal from the analog scan data signal. The second derivative signal generation stage derives a second derivative signal from the first derivative signal. The second-derivative zero-crossing detector detects zero crossings in said second derivative signal. The real-time bar code element detector automatically detects the presence and absence of bar code element data encoded within said analog scan data signal. The control logic circuitry automatically activates the second-derivative zero-crossing detector in response to the detection of the presence of bar code element data encoded within said analog scan data signal, and automatically deactivates the second-derivative zero-crossing detector, in response to the detection of the absence of bar code element data encoded within the analog scan data signal. By virtue of the present invention, it is now possible to enable the detection of zero-crossings occurring in the second derivative of the analog scan data signals only when bar code element data has been detected, indicative that a bar code symbol has been scanned. This results in more accurate generation of digital output signals from the scan data signal processor.

公开(公告)号：US06540139B1

公开(公告)日：2003-04-01

申请号：US09499530

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: A scan data signal processor is disclosed for use with a laser scanning system having a plurality of different focal zones within which a laser scanning beam is scanned across one or more bar code symbols and an analog scan data signal is automatically produced. The scan data signal processor comprises a first and second derivative signal generation stages, a second-derivative zero-crossing detector, a real-time bar code element detector, and a control logic circuitry. The first derivative signal generation stage derives a first derivative signal from the analog scan data signal. The second derivative signal generation stage derives a second derivative signal from the first derivative signal. The second-derivative zero-crossing detector detects zero crossings in said second derivative signal. The real-time bar code element detector automatically detects the presence and absence of bar code element data encoded within said analog scan data signal. The control logic circuitry automatically activates the second-derivative zero-crossing detector in response to the detection of the presence of bar code element data encoded within said analog scan data signal, and automatically deactivates the second-derivative zero-crossing detector, in response to the detection of the absence of bar code element data encoded within the analog scan data signal. By virtue of the present invention, it is now possible to enable the detection of zero-crossings occurring in the second derivative of the analog scan data signals only when bar code element data has been detected, indicative that a bar code symbol has been scanned. This results in more accurate generation of digital output signals from the scan data signal processor.

公开(公告)号：US06527186B1

公开(公告)日：2003-03-04

申请号：US09442566

申请日：1999-11-18

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

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

IPC: G06K0710

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: 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：US07395968B2

公开(公告)日：2008-07-08

申请号：US11640538

申请日：2006-12-15

Applicant: LeRoy Dickson ,  Frank Check ,  John Groot ,  C. Harry Knowles

Inventor： LeRoy Dickson ,  Frank Check ,  John Groot ,  C. Harry Knowles

IPC: G06K7/10

CPC classification number: G06K7/10871 ,  G02B5/32 ,  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 ,  G06K2207/1016 ,  G06K2207/1017 ,  G06K2207/1018 ,  G06Q10/087 ,  G07F11/002 ,  G07G1/0045 ,  G07G1/0054

Abstract: A holographic laser scanner of ultra-compact design capable of reading bar and other types of graphical indicia within a large scanning volume using holographic optical elements and visible laser diodes. The holographic optical elements are arranged on the scanning disc in such a manner so that none of the laser scanning planes generated within the 3-D scanning volume of the system are spatially and temporally coincident with any other laser scanning plane within the 3-D scanning volume. This novel feature of the present invention ensures that there is substantially zero cross-talk at the plurality of photodetectors provided within the system, significantly improving the performance of the system.

Abstract translation: 一种超紧凑设计的全息激光扫描仪，能够使用全息光学元件和可见激光二极管在大扫描体积内读取条和其他类型的图形标记。 全息光学元件以这样的方式布置在扫描盘上，使得在系统的3-D扫描体积内产生的激光扫描平面在3D扫描内的空间和时间上与任何其它激光扫描平面不一致 卷。 本发明的这个新颖特征确保了在系统内提供的多个光电探测器上基本上没有串扰，从而显着提高了系统的性能。

公开(公告)号：US07051922B2

公开(公告)日：2006-05-30

申请号：US09837535

申请日：2001-04-18

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.

公开(公告)号：US06991167B2

公开(公告)日：2006-01-31

申请号：US10436893

申请日：2003-05-13

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

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

IPC: G06K7/10

CPC classification number: 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

Abstract: Disclosed is a bioptical laser scanning system that provides 360° of omnidirectional bar code symbol scanning coverage at a point of sale (POS) station. The system generates a 3-D omnidirectional laser scanning pattern between the horizontal and vertical scanning windows during system operation. The laser scanning pattern of the present invention comprises a complex of pairs of quasi-orthogonal laser scanning planes, each composed by 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 horizontal 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 horizontal scanning window.

Abstract translation: 公开了一种生物激光扫描系统，其在销售点（POS）站处提供360°的全方位条形码符号扫描覆盖。 系统运行期间，系统在水平和垂直扫描窗口之间生成三维全向激光扫描图案。 本发明的激光扫描图案包括准正交激光扫描平面对，它们由多个基本垂直的激光扫描平面组成，用于读取具有条形码元素的条形码符号（即梯形条形码符号 ），以及多个基本上水平的激光扫描平面，用于读取条形码符号，该条形码符号具有相对于基本垂直方向取向的条形码元素（即，栅栏栅栏型条形码符号） 到水平扫描窗口。

公开(公告)号：US20050189417A1

公开(公告)日：2005-09-01

申请号：US11032700

申请日：2005-01-10

Applicant: LeRoy Dickson ,  Frank Check ,  John Groot ,  C. Knowles

Inventor： LeRoy Dickson ,  Frank Check ,  John Groot ,  C. Knowles

IPC: G02B26/10 ,  G06K7/10 ,  G06K7/14 ,  G06K17/00 ,  G06Q10/08 ,  G07G1/00

CPC classification number: G06K7/10871 ,  G02B5/32 ,  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 ,  G06K2207/1016 ,  G06K2207/1017 ,  G06K2207/1018 ,  G06Q10/087 ,  G07F11/002 ,  G07G1/0045 ,  G07G1/0054

Abstract: A holographic laser scanner of ultra-compact design capable of reading bar and other types of graphical indicia within a large scanning volume using holographic optical elements and visible laser diodes. The holographic optical elements are arranged on the scanning disc in such a manner so that none of the laser scanning planes generated within the 3-D scanning volume of the system are spatially and temporally coincident with any other laser scanning plane within the 3-D scanning volume. This novel feature of the present invention ensures that there is substantially zero cross-talk at the plurality of photodetectors provided within the system, significantly improving the performance of the system.

Abstract translation: 一种超紧凑设计的全息激光扫描仪，能够使用全息光学元件和可见激光二极管在大扫描体积内读取条和其他类型的图形标记。 全息光学元件以这样的方式布置在扫描盘上，使得在系统的3-D扫描体积内产生的激光扫描平面在3D扫描内的空间和时间上与任何其它激光扫描平面不一致 卷。 本发明的这个新颖特征确保了在系统内提供的多个光电探测器上基本上没有串扰，从而显着提高了系统的性能。

公开(公告)号：US06588663B1

公开(公告)日：2003-07-08

申请号：US09501903

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 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 a control signal produced by determining the spot speed of the laser scanning beam producing the analog scan data signal being processed. 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: 区域激光扫描系统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来处理模拟扫描数据信号，该多个通带滤波器和放大器被自动选择，以便仅当通过条形码符号为...时产生的模拟扫描数据信号的频谱分量 在激光扫描系统的特定焦点区域扫描。 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聚焦区域相关联的光谱带。 当条形码，符号被聚焦在系统的第一焦点区域或扫描范围内的激光束扫描时，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由 确定激光扫描光束的光点速度，产生正在处理的模拟扫描数据信号。 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：US06481625B2

公开(公告)日：2002-11-19

申请号：US09442718

申请日：1999-11-18

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。