公开(公告)号：WO2004027691A1

公开(公告)日：2004-04-01

申请号：PCT/US2003/027771

申请日：2003-09-02

Applicant: MICROSCAN SYSTEMS INCORPORATED

Inventor： KOLSTAD, Jesse, J.

IPC: G06K7/10

CPC classification number: G06K7/10851

Abstract: The disclosure describes an apparatus and method for automatic gain control during scanning. The apparatus comprises an optical detector to receive an optical signal reflected from a symbol positioned within a scan window by an optical beam scanned from a leading edge of the scan window to a trailing edge of the scan window; and a processor coupled to the optical detector to adjust the gain of the optical detector during the beam scan. The process comprises receiving an optical signal using an optical detector, wherein the optical signal comprises optical energy reflected from a symbol positioned in a scan window as an optical beam scans from a leading edge of the scan window to a trailing edge of the scan window, and adjusting the gain of the optical detector during receipt of the optical signal. A calibration process is disclosed comprising calibrating the optical detector to obtain a plurality of gain corrections, each gain correction corresponding to a different position between a leading edge and a trailing edge of a scan window, and storing the plurality of gain correction.

Abstract translation: 本公开描述了一种用于扫描期间自动增益控制的装置和方法。 该装置包括光学检测器，用于通过从扫描窗口的前沿扫描到扫描窗口的后沿的光束来接收从位于扫描窗口内的符号反射的光信号; 以及耦合到光学检测器的处理器，以在光束扫描期间调节光学检测器的增益。 该过程包括使用光学检测器接收光学信号，其中当光束从扫描窗口的前沿扫描到扫描窗口的后沿时，光信号包括从位于扫描窗口中的符号反射的光能， 以及在光信号的接收期间调节光检测器的增益。 公开了一种校准过程，包括校准光学检测器以获得多个增益校正，每个增益校正对应于扫描窗口的前沿和后沿之间的不同位置，并存储多个增益校正。

公开(公告)号：WO2005106768A2

公开(公告)日：2005-11-10

申请号：PCT/US2005/011226

申请日：2005-04-04

Applicant: MICROSCAN SYSTEMS INCORPORATED ,  KOLSTAD, Jesse, J. ,  DAVIS, Bryan, L.

Inventor： KOLSTAD, Jesse, J. ,  DAVIS, Bryan, L.

IPC: G06K7/10

CPC classification number: G06K7/10851

Abstract: According to embodiments of the present invention, a barcode scanner platform is provided in which the gain of an analog signal representative of a barcode is controlled using a control loop. In embodiments, an MTF detector generates a value (e.g., DC) representative of a low frequency portion (wide or out of optical focus elements) of the analog signal and a second value (e.g., DC) representative of a high frequency portion (narrow elements or in optical focus elements) of the analog signal. The processor uses the first and the second values and a reference amplitude to determine a gain IE signal. The processor provides the gain signal to an AGC circuit that provides a linear response to the gain signal using matched JFETs. A noise filter can be enabled or disabled based on the first value, the second value, and/or the barcode scanner platform read rate.

Abstract translation: 根据本发明的实施例，提供了一种条形码扫描器平台，其中使用控制回路来控制代表条形码的模拟信号的增益。 在实施例中，MTF检测器生成表示模拟信号的低频部分（宽或者光学元件的宽度）的值（例如，DC）和表示高频部分（窄的部分）的第二值（例如，DC） 元件或光学聚焦元件）。 处理器使用第一和第二值以及参考幅度来确定增益IE信号。 处理器向AGC电路提供增益信号，该AGC电路使用匹配的JFET向增益信号提供线性响应。 可以基于第一值，第二值和/或条形码扫描器平台读取速率来启用或禁用噪声滤波器。

公开(公告)号：EP1741046A2

公开(公告)日：2007-01-10

申请号：EP05731262.1

申请日：2005-04-04

Applicant: MICROSCAN SYSTEMS INCORPORATED

Inventor： KOLSTAD, Jesse, J. ,  DAVIS, Bryan, L.

IPC: G06K7/10

CPC classification number: G06K7/10851

Abstract: According to embodiments of the present invention, a barcode scanner platform is provided in which the gain of an analog signal representative of a barcode is controlled using a control loop. In embodiments, an MTF detector generates a value (e.g., DC) representative of a low frequency portion (wide or out of optical focus elements) of the analog signal and a second value (e.g., DC) representative of a high frequency portion (narrow elements or in optical focus elements) of the analog signal. The processor uses the first and the second values and a reference amplitude to determine a gain IE signal. The processor provides the gain signal to an AGC circuit that provides a linear response to the gain signal using matched JFETs. A noise filter can be enabled or disabled based on the first value, the second value, and/or the barcode scanner platform read rate.

公开(公告)号：EP1540571B1

公开(公告)日：2010-07-14

申请号：EP03797882.2

申请日：2003-09-02

Applicant: MICROSCAN SYSTEMS INCORPORATED

Inventor： KOLSTAD, Jesse, J.

IPC: G06K7/10

CPC classification number: G06K7/10851

公开(公告)号：EP1741046B1

公开(公告)日：2015-05-20

申请号：EP05731262.1

申请日：2005-04-04

Applicant: MICROSCAN SYSTEMS INCORPORATED

Inventor： KOLSTAD, Jesse, J. ,  DAVIS, Bryan, L.

IPC: G06K7/10

CPC classification number: G06K7/10851

公开(公告)号：EP1540571A1

公开(公告)日：2005-06-15

申请号：EP03797882.2

申请日：2003-09-02

Applicant: MICROSCAN SYSTEMS INCORPORATED

Inventor： KOLSTAD, Jesse, J.

IPC: G06K7/10

CPC classification number: G06K7/10851

Abstract: The disclosure describes an apparatus and method for automatic gain control during scanning. The apparatus comprises an optical detector to receive an optical signal reflected from a symbol positioned within a scan window by an optical beam scanned from a leading edge of the scan window to a trailing edge of the scan window; and a processor coupled to the optical detector to adjust the gain of the optical detector during the beam scan. The process comprises receiving an optical signal using an optical detector, wherein the optical signal comprises optical energy reflected from a symbol positioned in a scan window as an optical beam scans from a leading edge of the scan window to a trailing edge of the scan window, and adjusting the gain of the optical detector during receipt of the optical signal. A calibration process is disclosed comprising calibrating the optical detector to obtain a plurality of gain corrections, each gain correction corresponding to a different position between a leading edge and a trailing edge of a scan window, and storing the plurality of gain correction.