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31. 发明授权

US06948659B2 Hand-supportable planar laser illumination and imaging (PLIIM) device 失效
标题翻译：手持平面激光照明和成像（PLIIM）设备
公开(公告)号：US06948659B2
公开(公告)日：2005-09-27
申请号：US10105031
申请日：2002-03-22
申请人： Constantine J. Tsikos , C. Harry Knowles , Michael D. Schnee , Timothy A. Good
发明人： Constantine J. Tsikos , C. Harry Knowles , Michael D. Schnee , Timothy A. Good
IPC分类号： G02B6/42 , G02B27/48 , G06C11/08 , G06F17/00 , G06K7/10 , G06K7/14 , G06K9/22 , G07B15/06 , H01S3/00 , H01S3/08 , H01S5/00 , H01S5/022 , H01S5/40
CPC分类号： G06K7/10 , G02B19/0014 , G02B19/0052 , G02B19/0085 , G02B19/009 , G02B19/0095 , G02B26/10 , G02B27/095 , G02B27/48 , G06K7/10594 , G06K7/10732 , G06K7/146 , G06K9/26 , G06K9/325 , H01S5/005 , H01S5/02248 , H01S5/4025
摘要： A hand-supportable linear-type planar laser illumination and imaging (PLIIM) based device comprising a linear image formation and detection (IFD) module having a linear array of image detection elements and also image formation optics having a field of view (FOV) focusing a linear image of an object onto the linear array of image detection elements. A pair of planar laser illumination arrays (PLIAs) is arranged on opposite sides of the linear image formation and detection module, and produces a plurality of spatially-incoherent planar laser illumination beam (PLIB) components that are optically combined with respect to other PLIB components so as to produce a composite planar laser illumination beam (PLIB) that is arranged in a coplanar relationship with at least a portion of the FOV. Each PLIA includes a plurality of planar laser illumination modules (PLIMs). Each PLIM includes a laser diode and beam focusing and diverging optics for producing one spatially-incoherent PLIB component. The composite PLIB produces a number of substantially different individual speckle noise patterns at the linear array of image detection elements during the photo-integration time period thereof. The speckle noise power observed at the linear array of image detection elements is reduced through temporal averaging of the individual speckle noise patterns during the photo-integration time period. By virtue of the present invention, it is now possible to use visible laser diodes (VLDs) to produce speckle-reduced images of objects suitable for OCR processing, while enjoying improved working distances offered by planar laser illumination techniques.
摘要翻译：一种手持式线性平面激光照明和成像（PLIIM）设备，包括具有图像检测元件线性阵列的线性图像形成和检测（IFD）模块，以及具有视场聚焦（FOV）聚焦的图像形成光学器件物体的线性图像到图像检测元件的线性阵列上。一对平面激光照明阵列（PLIA）布置在线性图像形成和检测模块的相对侧上，并且产生多个相对于其它PLIB组件光学组合的空间非相干平面激光照明光束（PLIB）部件以便产生与FOV的至少一部分以共面关系布置的复合平面激光照明光束（PLIB）。每个PLIA包括多个平面激光照明模块（PLIM）。每个PLIM包括激光二极管和用于产生一个空间非相干PLIB组件的光束聚焦和发散光学器件。复合PLIB在其光积分时间段期间在图像检测元件的线性阵列处产生许多基本上不同的单个斑点噪声图案。在光积分时间段期间，通过对各个散斑噪声模式的时间平均，减少了在图像检测元件的线性阵列处观察到的斑点噪声功率。凭借本发明，现在可以使用可见激光二极管（VLD）来产生适于OCR处理的物体的散斑图像，同时享受由平面激光照射技术提供的改进的工作距离。

32. 发明授权

US06959869B2 Automatic vehicle identification (AVI) system employing planar laser illumination and imaging (PLIIM) based subsystems 失效
标题翻译：采用平面激光照明和成像（PLIIM）的子系统的自动车辆识别（AVI）系统
公开(公告)号：US06959869B2
公开(公告)日：2005-11-01
申请号：US10161091
申请日：2002-05-31
申请人： Constantine J. Tsikos , C. Harry Knowles , Xiaoxun Zhu , Michael D. Schnee
发明人： Constantine J. Tsikos , C. Harry Knowles , Xiaoxun Zhu , Michael D. Schnee
IPC分类号： G02B6/42 , G06C11/08 , G06F17/00 , G06K7/10 , G06K7/14 , G06K9/22 , G07B15/06 , H01S3/00 , H01S3/08 , H01S5/00 , H01S5/022 , H01S5/40
CPC分类号： G06K9/26 , G02B27/48 , G06K7/10594 , G06K9/325 , G07B15/06 , H01S5/005 , H01S5/02248 , H01S5/4025
摘要： An automatic vehicle identification (AVI) system for installation along a roadway, comprising one or more a planar laser illumination and imaging (PLIIM) based linear imaging subsystems mounted above the roadway in a spaced apart manner. The PLIIM based subsystems are arranged for capturing digital linear images of both the front and rear license plates mounted on each moving vehicle travelling under the PLIIM based linear imaging subsystem, and generating digital image data representative of each captured digital linear image. An image processing subsystem is provided for receiving and processing the digital image data generated by the PLIIM-based imaging systems, so as to automatically read the alphanumeric strings on the front and/or rear license plates of each the vehicle. These recognized strings are then compared against vehicle registration information stored in a database in order to identify each vehicle travelling under along the roadway. By virtual of the present invention, it is now possible to capture and buffer high-resolution linear images of the license plates on moving vehicles using planar laser illumination beams and coplanar fields of view, so that these linear images can be sequentially assembled to construct 2-D images for OCR processing so that such vehicles can be automatically identified, while avoiding the need for large and expensive high-intensity lighting equipment required by conventional digital cameras employing 2-D electronic image detectors.
摘要翻译：一种用于沿道路安装的自动车辆识别（AVI）系统，包括以间隔开的方式安装在道路上方的一个或多个基于平面激光照明和成像（PLIIM）的线性成像子系统。基于PLIIM的子系统被布置用于捕获安装在基于PLIIM的线性成像子系统下的每个移动车辆上的前后车牌的数字线性图像，以及生成表示每个捕获的数字线性图像的数字图像数据。提供图像处理子系统，用于接收和处理由基于PLIIM的成像系统产生的数字图像数据，以便自动读取每个车辆的前部和/或后部车牌上的字母数字串。然后将这些识别的字符串与存储在数据库中的车辆登记信息进行比较，以便识别沿着道路行进的每辆车辆。通过本发明，现在可以使用平面激光照明光束和共面视场来捕获并缓冲移动车辆上的车牌的高分辨率线性图像，使得这些线性图像可以被顺序组装以构成2 -D图像，以便能够自动识别这种车辆，同时避免需要使用2-D电子图像检测器的常规数字照相机所需的大型和昂贵的高强度照明设备。

33. 发明授权

US07143943B2 Method of producing digital images of objects using planar laser illumination beams and electronic image detection arrays 失效
标题翻译：使用平面激光照明光束和电子图像检测阵列产生物体的数字图像的方法
公开(公告)号：US07143943B2
公开(公告)日：2006-12-05
申请号：US10639362
申请日：2003-08-12
申请人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Allan Wirth , Andrew Jankevics , Carl Harry Knowles
发明人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Allan Wirth , Andrew Jankevics , Carl Harry Knowles
IPC分类号： G06K7/10
CPC分类号： B82Y15/00 , G02B26/10 , G02B27/48 , G06K7/10722 , G06K7/10732 , G06K7/10811 , H01S5/02248 , H01S5/4025
摘要： Methods of and systems for illuminating objects using planar laser illumination beams (PLIBs) having substantially-planar spatial distribution characteristics that extend throughout the field of view (FOV) of image formation and detection modules employed in such systems. Each PLIB is produced from a planar laser illumination beam array (PLIA) comprising a plurality of planar laser illumination modules (PLIMs). Each PLIM comprises a visible laser diode (VLD), a focusing lens, and a cylindrical optical element arranged with each PLIM, which is adjustable relative to other PLIMs so as to permit precise positioning of each PLIM relative to the optical axis of the imaging optics of the image formation and detection module. The individual PLIB components produced from each PLIM are optically combined to produce a composite substantially planar laser illumination beam having substantially uniform power density characteristics over the entire spatial extend thereof and thus the working range of the system.
摘要翻译：使用平面激光照明光束（PLIB）照明物体的方法和系统，该平面激光照明光束（PLIB）具有延伸到在这种系统中使用的图像形成和检测模块的视场（FOV）中的基本上平面的空间分布特性。每个PLIB由包括多个平面激光照明模块（PLIM）的平面激光照射束阵列（PLIA）产生。每个PLIM包括可见激光二极管（VLD），聚焦透镜和布置有每个PLIM的圆柱形光学元件，每个PLIM可相对于其它PLIM调节，以便允许每个PLIM相对于成像光学器件的光轴精确定位的图像形成和检测模块。从每个PLIM产生的各个PLIB组件被光学组合以产生在其整个空间延伸上具有基本均匀的功率密度特性的复合的基本上平面的激光照明光束，并因此产生系统的工作范围。

34. 发明授权

US07131586B2 Method of and apparatus for reducing speckle-pattern noise in a planar laser illumination and imaging (PLIIM) based system 失效
标题翻译：用于减少基于平面激光照明和成像（PLIIM）的系统中散斑模式噪声的方法和装置
公开(公告)号：US07131586B2
公开(公告)日：2006-11-07
申请号：US10730481
申请日：2003-12-08
申请人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Allan Wirth , Andrew Jankevics , Carl Harry Knowles
发明人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Allan Wirth , Andrew Jankevics , Carl Harry Knowles
IPC分类号： G06K7/14
CPC分类号： B82Y15/00 , G02B26/10 , G02B27/48 , G06K7/10722 , G06K7/10732 , G06K7/10811 , H01S5/02248 , H01S5/4025
摘要： Methods of and systems for illuminating objects using planar laser illumination beams having substantially-planar spatial distribution characteristics that extend through the field of view (FOV) of image formation and detection modules employed in such systems. Each planar laser illumination beam is produced from a planar laser illumination beam array (PLIA) comprising an plurality of planar laser illumination modules (PLIMs). Each PLIM comprises a visible laser diode (VLD, a focusing lens, and a cylindrical optical element arranged therewith. The individual planar laser illumination beam components produced from each PLIM are optically combined to produce a composite substantially planar laser illumination beam having substantially uniform power density characteristics over the entire spatial extend thereof and thus the working range of the system. Preferably, each planar laser illumination beam component is focused so that the minimum beam width thereof occurs at a point or plane which is the farthest or maximum object distance at which the system is designed to acquire images, thereby compensating for decreases in the power density of the incident planar laser illumination beam due to the fact that the width of the planar laser illumination beam increases in length for increasing object distances away from the imaging optics. By virtue of the present invention, it is now possible to use both VLDs and high-speed CCD-type image detectors in conveyor, hand-held and hold-under type scanning applications alike, enjoying the advantages and benefits that each such technology has to offer, while avoiding the shortcomings and drawbacks hitherto associated therewith.
摘要翻译：使用具有基本上平面的空间分布特性的平面激光照明光束照射物体的方法和系统，其延伸通过图像形成的视野（FOV）和在这种系统中使用的检测模块。每个平面激光照明光束由包括多个平面激光照射模块（PLIM）的平面激光照射束阵列（PLIA）产生。每个PLIM包括可见激光二极管（VLD，聚焦透镜和与其配置的圆柱形光学元件），由每个PLIM产生的各个平面激光照明光束分量被光学组合以产生具有基本上均匀功率密度的复合基本上平面的激光照明光束优选地，每个平面激光照射光束分量被聚焦，使得其最小光束宽度发生在最远或最大物体距离的点或平面处，在该点或平面处，系统被设计为获取图像，从而补偿入射的平面激光照明光束的功率密度的降低，这是由于平面激光照射光束的宽度在长度上增加以增加远离成像光学元件的物体距离的本发明，现在可以使用两种VLD和高在传送带，手持式和保持型扫描应用中，速度CCD型图像检测器同样享有每种这样的技术所提供的优点和好处，同时避免迄今为止的缺点和缺点。

35. 发明授权

US06830189B2 METHOD OF AND SYSTEM FOR PRODUCING DIGITAL IMAGES OF OBJECTS WITH SUBTANTIALLY REDUCED SPECKLE-NOISE PATTERNS BY ILLUMINATING SAID OBJECTS WITH SPATIALLY AND/OR TEMPORALLY COHERENT-REDUCED PLANAR LASER ILLUMINATION 失效
公开(公告)号：US06830189B2
公开(公告)日：2004-12-14
申请号：US09883130
申请日：2001-06-15
申请人： Constantine J. Tsikos , Allan Wirth , Andrew Jankevics , Steve Y. Kim , Timothy Good , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Xiaoxun Zhu , Michael D. Schnee , Carl Harry Knowles
发明人： Constantine J. Tsikos , Allan Wirth , Andrew Jankevics , Steve Y. Kim , Timothy Good , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Xiaoxun Zhu , Michael D. Schnee , Carl Harry Knowles
IPC分类号： G06K710
CPC分类号： B82Y15/00 , G02B26/106 , G02B27/48 , G06K7/10 , G06K7/10564 , G06K7/10584 , G06K7/10594 , G06K7/10603 , G06K7/10663 , G06K7/10673 , G06K7/10693 , G06K7/10702 , G06K7/10722 , G06K7/10732 , 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 , G07G1/0054 , H01L21/28575 , H01L29/452 , H01S5/02248
摘要： Methods of and systems for illuminating objects using planar laser illumination beams having substantially-planar spatial distribution characteristics that extend through the field of view (FOV) of image formation and detection modules employed in such systems. Each planar laser illumination beam is produced from a planar laser illumination beam array (PLIA) comprising an plurality of planar laser illumination modules (PLIMs). Each PLIM comprises a visible laser diode (VLD, a focusing lens, and a cylindrical optical element arranged therewith. The individual planar laser illumination beam components produced from each PLIM are optically combined to produce a composite substantially planar laser illumination beam having substantially uniform power density characteristics over the entire spatial extend thereof and thus the working range of the system. Preferably, each planar laser illumination beam component is focused so that the minimum beam width thereof occurs at a point or plane which is the farthest or maximum object distance at which the system is designed to acquire images, thereby compensating for decreases in the power density of the incident planar laser illumination beam due to the fact that the width of the planar laser illumination beam increases in length for increasing object distances away from the imaging optics. Advanced high-resolution wavefront control methods and devices are disclosed for use with the PLIIM-based systems in order to reduce the power of speckle-noise patterns observed at the image detections thereof. By virtue of the present invention, it is now possible to use both VLDs and high-speed CCD-type image detectors in conveyor, hand-held and hold-under type imaging applications alike, enjoying the advantages and benefits that each such technology has to offer, while avoiding the shortcomings and drawbacks hitherto associated therewith.

36. 发明授权

US07644866B2 Hand-supportable code symbol reader employing coplanar laser illumination and linear imaging 失效
标题翻译：手持式代码符号读取器采用共面激光照明和线性成像
公开(公告)号：US07644866B2
公开(公告)日：2010-01-12
申请号：US11974179
申请日：2007-10-11
申请人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Carl Harry Knowles
发明人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Carl Harry Knowles
IPC分类号： G06K7/10
CPC分类号： B82Y15/00 , G02B26/10 , G02B26/105 , G02B27/48 , G06K7/10554 , G06K7/10574 , G06K7/10633 , G06K7/10683 , G06K7/10722 , G06K7/10732 , G06K7/10811 , G06K7/10861 , H01S5/02248
摘要： A hand-supportable planar laser illumination and imaging (PLIIM) based code symbol reader includes: a hand-supportable housing having a light transmission aperture; a linear image formation and detection module having a linear image detection array; and a planar laser illumination beam (PLIB) producing device having at least one visible laser diode (VLD) for producing a planar laser illumination beam (PLIB). The code symbol reader further includes an image grabber for grabbing digital linear images formed and detected by the image formation and detection module, an image data buffer for buffering the digital linear images grabbed by the image grabber and constructing a two-dimensional digital image from a series of buffered linear digital images, and an image processing computer for processing the two-dimensional digital image so as to read code symbols graphically represented in the two-dimensional digital image.
摘要翻译：基于手持式平面激光照明和成像（PLIIM）的代码符号读取器包括：具有光传输孔径的手持式外壳; 具有线性图像检测阵列的线性图像形成和检测模块; 以及具有用于产生平面激光照明光束（PLIB）的至少一个可见激光二极管（VLD）的平面激光照明光束（PLIB）产生装置。代码符号读取器还包括用于抓取由图像形成和检测模块形成和检测的数字线性图像的图像获取器，用于缓冲由图像获取器抓取的数字线性图像并构建二维数字图像的图像数据缓冲器，一系列缓冲线性数字图像，以及用于处理二维数字图像以便读取在二维数字图像中图形表示的代码符号的图像处理计算机。

37. 发明授权

US07621455B2 Hand-supportable code symbol reader employing coplanar laser illumination and linear imaging 失效
标题翻译：手持式代码符号读取器采用共面激光照明和线性成像
公开(公告)号：US07621455B2
公开(公告)日：2009-11-24
申请号：US11974183
申请日：2007-10-11
申请人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Carl Harry Knowles
发明人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Carl Harry Knowles
IPC分类号： G06K7/10
CPC分类号： B82Y15/00 , G02B26/10 , G02B26/105 , G02B27/48 , G06K7/10554 , G06K7/10574 , G06K7/10633 , G06K7/10683 , G06K7/10722 , G06K7/10732 , G06K7/10811 , G06K7/10861 , H01S5/02248
摘要： A hand-supportable coplanar laser illumination and imaging (PLIIM) based code symbol reader includes: a hand-supportable housing having light transmission aperture; a linear image formation and detection module having a linear image detection array; and a planar laser illumination beam (PLIB) producing a coplanar laser illumination and imaging based device having at least one visible laser diode (VLD) for producing a planar light illumination beam (PLIB). The code symbol reader further includes an image grabber for grabbing digital linear images formed and detected by the image formation and detection module, an image data buffer for buffering the digital linear images grabbed by the image grabber, and an image processing computer for processing the buffered digital linear images so as to read code symbols graphically represented in the digital linear images. During object illumination and imaging operations, a controller automatically controls the linear image formation and detection module, the PLIB producing device, the image frame grabber, and the image data buffer.
摘要翻译：基于手持式共面激光照明和成像（PLIIM）的代码符号读取器包括：具有光传输孔径的手持式外壳; 具有线性图像检测阵列的线性图像形成和检测模块; 以及产生具有用于产生平面光照射束（PLIB）的至少一个可见激光二极管（VLD））的共面激光照明和基于成像的装置的平面激光照明光束（PLIB）。代码符号读取器还包括用于抓取由图像形成和检测模块形成和检测的数字线性图像的图像获取器，用于缓冲由图像获取器抓取的数字线性图像的图像数据缓冲器，以及用于处理缓冲的图像处理计算机数字线性图像，以便读取在数字线性图像中图形表示的代码符号。在物体照明和成像操作期间，控制器自动控制线性图像形成和检测模块，PLIB产生装置，图像帧抓取器和图像数据缓冲器。

38. 发明申请

US20080116279A1 Hand-supportable code symbol reader employing coplanar laser illumination and linear imaging 失效
标题翻译：手持式代码符号读取器采用共面激光照明和线性成像
公开(公告)号：US20080116279A1
公开(公告)日：2008-05-22
申请号：US11974179
申请日：2007-10-11
申请人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Carl Harry Knowles
发明人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Carl Harry Knowles
IPC分类号： G06K7/10
CPC分类号： B82Y15/00 , G02B26/10 , G02B26/105 , G02B27/48 , G06K7/10554 , G06K7/10574 , G06K7/10633 , G06K7/10683 , G06K7/10722 , G06K7/10732 , G06K7/10811 , G06K7/10861 , H01S5/02248
摘要： A hand-supportable planar laser illumination and imaging (PLIIM) based code symbol reader includES: a hand-supportable housing having light transmission aperture; a linear image formation and detection module having a linear image detection array; and a planar laser illumination beam (PLIB) producing device having at least one visible laser diode (VLD) for producing a planar light illumination beam (PLIB). The code symbol reader further includes image grabber for grabbing digital linear images formed and detected by the image formation and detection module, an image data buffer for buffering the digital linear images grabbed by the image grabber and constructing a two-dimensional image from a series of buffered linear digital images, and an image processing computer for processing the buffered two-dimensional digital image so as to read code symbols graphically represented in the two-dimensional digital linear image. During object illumination and imaging operations, a controller automatically controls the linear image formation and detection module, the PLIB producing device, the image frame grabber, and the image data buffer.
摘要翻译：基于手持式平面激光照明和成像（PLIIM）的代码符号读取器包括：具有光传输孔径的手持式外壳; 具有线性图像检测阵列的线性图像形成和检测模块; 以及具有用于产生平面光照射光束（PLIB）的至少一个可见激光二极管（VLD）的平面激光照明光束（PLIB）产生装置。代码符号读取器还包括用于抓取由图像形成和检测模块形成和检测的数字线性图像的图像获取器，用于缓冲由图像获取器抓取的数字线性图像并从一系列图像构建二维图像的图像数据缓冲器缓冲线性数字图像，以及用于处理缓冲的二维数字图像以便读取在二维数字线性图像中图形表示的代码符号的图像处理计算机。在物体照明和成像操作期间，控制器自动控制线性图像形成和检测模块，PLIB产生装置，图像帧抓取器和图像数据缓冲器。

39. 发明授权

US06764008B2 Planar laser illumination and imaging (PLIIM) system employing an area-type image detection array 失效
标题翻译：采用区域型图像检测阵列的平面激光照明和成像（PLIIM）系统
公开(公告)号：US06764008B2
公开(公告)日：2004-07-20
申请号：US10067509
申请日：2002-02-05
申请人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Carl Harry Knowles
发明人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Carl Harry Knowles
IPC分类号： G06K710
CPC分类号： B82Y15/00 , G02B26/10 , G02B26/105 , G02B27/48 , G06K7/10554 , G06K7/10574 , G06K7/10633 , G06K7/10683 , G06K7/10722 , G06K7/10732 , G06K7/10811 , G06K7/10861 , H01S5/02248
摘要： In a planar light illumination and imaging (PLIIM) system, a planar light illumination module (PLIM) of compact construction produces a planar laser illumination beam (PLIB) which emanates substantially within a single plane along the direction of beam propagation towards an object to be optically illuminated and imaged. The PLIM comprises a module housing which has an axial extent, first and second end portions, a central bore formed along the axial extent, and a recess integrally formed in the second end portion. A visible laser diode (VLD) is mounted along the bore at the first end portion of the module housing, for producing a laser beam generally along the axial extent. A focusing lens is mounted along the bore between the first and second end portions, for focusing the laser beam to a predetermined focal point. A laser beam expansion element is mounted within the recess at the second end portion of the module housing, and expanding the laser beam along a predetermined direction and producing a substantially planar laser illumination beam from the beam expansion component.
摘要翻译：在平面光照和成像（PLIIM）系统中，紧凑结构的平面光照模块（PLIM）产生平面激光照明光束（PLIB），该平面激光照明光束（PLIB）沿着波束传播方向基本上在单个平面内发射，光学照明并成像。 PLIM包括：模块壳体，其具有轴向范围，第一和第二端部，沿着轴向延伸形成的中心孔，以及在第二端部中一体形成的凹部。可见激光二极管（VLD）沿着孔在模块壳体的第一端部安装，用于通常沿着轴向范围产生激光束。沿着孔在第一和第二端部之间安装聚焦透镜，用于将激光束聚焦到预定的焦点。激光束膨胀元件安装在模块壳体的第二端部处的凹部内，并且沿着预定方向使激光束膨胀，并且产生来自光束膨胀部件的基本上平面的激光照明光束。

40. 发明授权

US06742707B1 METHOD OF SPECKLE-NOISE PATTERN REDUCTION AND APPARATUS THEREFOR BASED ON REDUCING THE SPATIAL-COHERENCE OF THE PLANAR LASER ILLUMINATION BEAM BEFORE THE BEAM ILLUMINATES THE TARGET OBJECT BY APPLYING SPATIAL PHASE SHIFTING TECHNIQUES DURING THE TRANSMISSION OF THE PLIB THERETOWARDS 失效
公开(公告)号：US06742707B1
公开(公告)日：2004-06-01
申请号：US09781665
申请日：2001-02-12
申请人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Allan Wirth , Andrew Jankevics , Carl Harry Knowles
发明人： Constantine J. Tsikos , Michael D. Schnee , Xiaoxun Zhu , Thomas Amundsen , Charles A. Naylor , Russell Joseph Dobbs , Allan Wirth , Andrew Jankevics , Carl Harry Knowles
IPC分类号： G06K710
CPC分类号： B82Y15/00 , G02B26/10 , G02B27/48 , G06K7/10722 , G06K7/10732 , G06K7/10811 , H01S5/02248 , H01S5/4025
摘要： A planar laser illumination and imaging (PLIIM) based camera system capable of producing digital images with reduced levels of speckle-pattern noise. The PLIIM based camera system comprises a planar laser illumination array (PLIA) including a plurality of laser diodes for producing and projecting a planar laser illumination beam (PLIB) through a light transmission aperture, so as to illuminate an object as it is moving past said PLIIM based camera system. An image formation and detection (IFD) module is provided having a image detection array and imaging forming optics for providing said image detection array with a field of view (FOV). The PLIB and FOV are arranged in a coplanar relationship along the working range of the PLIIM based camera system so that the PLIB illuminates primarily within the FOV of the IFD module. A speckle-pattern noise reduction subsystem is integrated with the PLIA, for reducing the spatial-coherence of said planar laser illumination beam (PLIB) before the PLIB illuminates a target object. The speckle-pattern noise reduction subsystem carries out a spatial phase shifting technique during the transmission of the PLIB towards the target, so that the object is illuminated with a spatially coherent-reduced planar laser illumination beam (PLIB) and numerous substantially different time-varying speckle-noise patterns are produced at the image detection array over the photo-integration time period thereof. The numerous substantially different time-varying speckle-noise patterns are detected at the image detection array over the photo-integration time period, and the detected speckle-noise patterns are temporally averaged at said image detection array during the photo-integration time period thereof. As a result of such temporal averaging, the power of observable speckle-noise patterns is reduced at the image detection array. By virtue of the present invention, it is now possible to enjoy the benefits of laser-based illumination during high-speed imaging operations, without the adverse effects of speckle-pattern noise.

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