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1. 发明授权

US08287128B2 Laser projection source with polarization diversity element for speckle reduction 有权
标题翻译：具有极化分集元件的激光投射源，用于散斑减光
公开(公告)号：US08287128B2
公开(公告)日：2012-10-16
申请号：US12573563
申请日：2009-10-05
申请人： Alban N. Lescure , Markus Duelli , Mark O. Freeman , Witold R. Teller
发明人： Alban N. Lescure , Markus Duelli , Mark O. Freeman , Witold R. Teller
IPC分类号： G03B21/14
CPC分类号： G02B27/48 , G02B27/1033 , G02B27/108 , G03B21/2073 , G03B21/208
摘要： An imaging system (200), such as a scanned laser projection system, includes one or more laser sources (201) configured to produce one or more light beams (204), and a light modulator (203) configured to produce images (206) from the light beams (204). A polarization diversity element (221), which can be manufactured from a birefringent material or from a polymerized liquid crystal layer, is disposed within the imaging system (200). The polarization diversity element (221) is configured to alter the polarization of an incident beam to create a transmitted beam comprising diverse polarization patterns, thereby reducing speckle in projected images.
摘要翻译：诸如扫描激光投影系统的成像系统（200）包括被配置为产生一个或多个光束（204）的一个或多个激光源（201）和被配置为产生图像（206）的光调制器（203）从光束（204）。可以在成像系统（200）内设置可由双折射材料或聚合液晶层制造的偏振分集元件（221）。偏振分集元件（221）被配置为改变入射光束的偏振，以产生包括各种偏振图案的透射光束，从而减少投影图像中的斑点。

2. 发明申请

US20100265467A1 Laser Projection Source with Polarization Diversity Element for Speckle Reduction 有权
标题翻译：激光投影源与偏振分集元素减少斑点
公开(公告)号：US20100265467A1
公开(公告)日：2010-10-21
申请号：US12573563
申请日：2009-10-05
申请人： Alban N. Lescure , Markus Duelli , Mark O. Freeman , Witold R. Teller
发明人： Alban N. Lescure , Markus Duelli , Mark O. Freeman , Witold R. Teller
IPC分类号： G03B21/14 , G02B5/30 , B05D3/14 , B05D3/06
CPC分类号： G02B27/48 , G02B27/1033 , G02B27/108 , G03B21/2073 , G03B21/208
摘要： An imaging system (200), such as a scanned laser projection system, includes one or more laser sources (201) configured to produce one or more light beams (204), and a light modulator (203) configured to produce images (206) from the light beams (204). A polarization diversity element (221), which can be manufactured from a birefringent material or from a polymerized liquid crystal layer, is disposed within the imaging system (200). The polarization diversity element (221) is configured to alter the polarization of an incident beam to create a transmitted beam comprising diverse polarization patterns, thereby reducing speckle in projected images.
摘要翻译：诸如扫描激光投影系统的成像系统（200）包括被配置为产生一个或多个光束（204）的一个或多个激光源（201）和被配置为产生图像（206）的光调制器（203）从光束（204）。可以在成像系统（200）内设置可由双折射材料或聚合液晶层制造的偏振分集元件（221）。偏振分集元件（221）被配置为改变入射光束的偏振，以产生包括各种偏振图案的透射光束，从而减少投影图像中的斑点。

3. 发明申请

US20100097534A1 Projection System Using High-Frequency Drive Modulation to Reduce Perceived Speckle 有权
标题翻译：使用高频驱动调制的投影系统来减少感觉到的斑点
公开(公告)号：US20100097534A1
公开(公告)日：2010-04-22
申请号：US12255639
申请日：2008-10-21
申请人： Witold R. Teller , Alban N. Lescure , Mark O. Freeman
发明人： Witold R. Teller , Alban N. Lescure , Mark O. Freeman
IPC分类号： H04N5/74
CPC分类号： H04N9/3129
摘要： An image producing system (1400) delivers images (1414) having reduced speckle by employing one or more drive circuits (1404, 1405, 1406) that deliver both a direct current drive signal (205) and an alternating current drive signal (405) to one or more lasers (1401, 1402, 1403). Specifically, an alternating current drive circuit (403) is used in conjunction with a direct current drive circuit (203) to modulate a drive signal. The modulation can be at a frequency of between 400 MHz and 600 MHz. When lasers, such as the red laser (1401) or the blue laser (1403) of a multi-laser system are modulated in such a fashion, their emitted spectral widths (407) greatly expand, thereby reducing speckle in projected images (1414).
摘要翻译：图像产生系统（1400）通过采用一个或多个传送直流驱动信号（205）和交流驱动信号（405）的驱动电路（1404,1405,1406）来传送具有减少的斑点的图像（1414），一个或多个激光器（1401,1402,1403）。具体地，交流驱动电路（403）与直流驱动电路（203）结合使用以调制驱动信号。调制可以在400MHz和600MHz之间的频率上。当以这种方式调制激光器（例如多激光系统的红色激光器（1401）或蓝色激光器（1403））时，其发射的光谱宽度（407）大大地扩大，从而减少投影图像中的斑点（1414）。

4. 发明授权

US07972008B2 Projection system using high-frequency drive modulation to reduce perceived speckle 有权
标题翻译：投影系统采用高频驱动调制来减少感觉到的斑点
公开(公告)号：US07972008B2
公开(公告)日：2011-07-05
申请号：US12255639
申请日：2008-10-21
申请人： Witold R Teller , Alban N Lescure , Mark O. Freeman
发明人： Witold R Teller , Alban N Lescure , Mark O. Freeman
IPC分类号： H04N5/74
CPC分类号： H04N9/3129
摘要： An image producing system (1400) delivers images (1414) having reduced speckle by employing one or more drive circuits (1404, 1405, 1406) that deliver both a direct current drive signal (205) and an alternating current drive signal (405) to one or more lasers (1401, 1402, 1403). Specifically, an alternating current drive circuit (403) is used in conjunction with a direct current drive circuit (203) to modulate a drive signal. The modulation can be at a frequency of between 400 MHz and 600 MHz. When lasers, such as the red laser (1401) or the blue laser (1403) of a multi-laser system are modulated in such a fashion, their emitted spectral widths (407) greatly expand, thereby reducing speckle in projected images (1414).
摘要翻译：图像产生系统（1400）通过采用一个或多个传送直流驱动信号（205）和交流驱动信号（405）的驱动电路（1404,1405,1406）来传送具有减少的斑点的图像（1414），一个或多个激光器（1401,1402,1403）。具体地，交流驱动电路（403）与直流驱动电路（203）结合使用以调制驱动信号。调制可以在400MHz和600MHz之间的频率上。当以这种方式调制激光器（例如多激光系统的红色激光器（1401）或蓝色激光器（1403））时，其发射的光谱宽度（407）大大地扩大，从而减少投影图像中的斑点（1414）。

5. 发明申请

US20120013855A1 Laser Scanning Imaging System with Reduced Speckle 有权
标题翻译：具有减少斑点的激光扫描成像系统
公开(公告)号：US20120013855A1
公开(公告)日：2012-01-19
申请号：US12835028
申请日：2010-07-13
申请人： Alban N. Lescure , Markus Duelli , Mark O. Freeman
发明人： Alban N. Lescure , Markus Duelli , Mark O. Freeman
IPC分类号： G02B27/48 , G02B26/10 , G03B21/28
CPC分类号： G02B27/48 , G02B26/101 , G03B21/2033 , H04N9/3129 , H04N9/3167
摘要： An imaging system (200) is configured to reduce perceived speckle (106) in images (201) by introducing angular diversity into consecutively projected images. The imaging system (200) includes one or more laser sources (203) that are configured to produce one or more light beams (215). A light modulator (204) scans these light beams (215) to produce images. A light translation element (206) introduces the angular diversity by physically altering a light reception location (208) on the light modulator (204) between refresh sweeps. To preserve image stability, image data (220) in a memory (218) can be correspondingly shifted.
摘要翻译：成像系统（200）被配置为通过将角度分集引入连续投影的图像来减少图像（201）中的感知散斑（106）。成像系统（200）包括被配置为产生一个或多个光束（215）的一个或多个激光源（203）。光调制器（204）扫描这些光束（215）以产生图像。光转换元件（206）通过在刷新扫描之间物理地改变光调制器（204）上的光接收位置（208）来引入角度分集。为了保持图像稳定性，存储器（218）中的图像数据（220）可以相应地移位。

6. 发明授权

US08567957B2 Active polarization switch for speckle reduction in laser projection sources 有权
标题翻译：激光投影光源减少斑点的主动偏振开关
公开(公告)号：US08567957B2
公开(公告)日：2013-10-29
申请号：US13179828
申请日：2011-07-11
申请人： Markus Duelli , Mark O. Freeman , Christian Dean DeJong , Alban N. Lescure
发明人： Markus Duelli , Mark O. Freeman , Christian Dean DeJong , Alban N. Lescure
IPC分类号： G03B21/14 , G02F1/1335 , H04N3/02
CPC分类号： G02B27/286 , G02B27/48 , G03B21/2033 , G03B21/208 , H04N9/3129 , H04N9/3167
摘要： A laser-based imaging system (200) is configured to reduce perceived speckle in images (201). The imaging system (200) includes one or more laser sources (207), a light modulator (204) configured to produce the images (201) with light (205) from the laser sources (207), and one or more active polarization switches (206) disposed in an optical path of the imaging system (200). The active polarization switch (206) is configured to alternate a polarization orientation of the light in synchrony with an image refresh cycle of the system. The active polarization switch can be clocked in accordance with a clocking angle to optimize speckle reduction. Additionally, one or more light preconditioners (991,992) may be used to help optimize speckle reduction.
摘要翻译：基于激光的成像系统（200）被配置为减少图像中感知到的斑点（201）。成像系统（200）包括一个或多个激光源（207），配置成用来自激光源（207）的光（205）产生图像（201）的光调制器（204）和一个或多个有源极化开关（206）设置在成像系统（200）的光路中。主动偏振开关（206）被配置为与系统的图像刷新周期同步地交替光的偏振取向。主动偏振开关可以按照时钟角计时，以优化散斑减少。另外，一个或多个光预处理器（991,992）可用于帮助优化散斑减少。

7. 发明授权

US08152307B2 Diffractive optical element having periodically repeating phase mask and system for reducing perceived speckle 有权
$Diffractive optical element having periodically repeating phase mask and system for reducing perceived speckle$
标题翻译：具有周期性重复相位掩模的衍射光学元件和用于减少感觉到的斑点的系统
公开(公告)号：US08152307B2
公开(公告)日：2012-04-10
申请号：US12643914
申请日：2009-12-21
申请人： Markus Duelli , Alban N. Lescure , Mark O. Freeman , Christian Dean DeJong , Joshua M. Hudman
发明人： Markus Duelli , Alban N. Lescure , Mark O. Freeman , Christian Dean DeJong , Joshua M. Hudman
IPC分类号： G03B21/14 , G03H1/12 , H01S5/00 , H01S3/08 , H01S3/13
CPC分类号： G02B27/48 , G03B21/14 , G03B21/2053
摘要： A optical apparatus (201) for use in an laser imaging system (200) is provided. The optical apparatus (201) includes one or more optical elements (215) that are configured to create an intermediate image plane (217) in the laser imaging system (200). A diffractive optical element (216) is then disposed at the intermediate image plane (217) to reduce speckle. The diffractive optical element (216) includes a periodically repeating phase mask (218) that can be configured in accordance with steps, vortex functions, Hermite-Gaussian functions, and so forth. Smooth grey-level phase transitional surface (337) can be placed between elements (333,334) to improve brightness and image quality. The periodically repeating phase mask (218) makes manufacture simple by reducing alignment sensitivity, and can be used to make applicable safety standards easier to meet as well.
摘要翻译：提供一种用于激光成像系统（200）的光学装置（201）。光学装置（201）包括被配置为在激光成像系统（200）中产生中间像平面（217）的一个或多个光学元件（215）。然后将衍射光学元件（216）设置在中间像平面（217）处以减少斑点。衍射光学元件（216）包括可根据步骤配置的周期性重复相位掩模（218），涡旋函数，Hermite-高斯函数等。可以将平滑的灰度级相位过渡表面（337）放置在元件（333,334）之间，以提高亮度和图像质量。周期性重复相位掩模（218）通过降低对准灵敏度使制造变得简单，并且可以用于使适用的安全标准更容易满足。

8. 发明授权

US08395714B2 Scanned projection system using polymerized liquid crystal layer for speckle reduction 有权
标题翻译：扫描投影系统使用聚合液晶层进行散斑减光
公开(公告)号：US08395714B2
公开(公告)日：2013-03-12
申请号：US12554095
申请日：2009-09-04
申请人： Alban N. Lescure , Markus Duelli , Mark O. Freeman
发明人： Alban N. Lescure , Markus Duelli , Mark O. Freeman
IPC分类号： G02F1/1335 , G02F1/1333 , G02F1/13
CPC分类号： H04N9/3129 , G02B5/3083 , G02B27/48 , G02F1/1334 , G02F2001/291 , G03B21/2033 , G03B33/06
摘要： An imaging system (200), such as a scanned laser projection system, includes one or more laser sources (201) configured to produce one or more light beams (204), and a light modulator (203) configured to produce images (206) from the light beams (204). Optional optical alignment devices (220) can be used to orient the light beams (204) into a combined light beam (205). A beam separator (221), which can be any of a birefringent wedge, compensated birefringent wedge, or a polymerized liquid crystal layer, is disposed between at least one of the laser sources (201) and the light modulator (203). The beam separator (221) is configured to receive light from the laser sources (201) and deliver two angularly separated and orthogonally polarized light beams (223) to the light modulator (203) so as to reduce speckle appearing when the images (206) are displayed on a display surface (207).
摘要翻译：诸如扫描激光投影系统的成像系统（200）包括被配置为产生一个或多个光束（204）的一个或多个激光源（201）和被配置为产生图像（206）的光调制器（203）从光束（204）。可选的光学对准装置（220）可用于将光束（204）定向成组合的光束（205）。可以在至少一个激光源（201）和光调制器（203）之间设置可以是双折射楔形物，补偿双折射楔形物或聚合液晶层中的任何一种的分束器（221）。光束分离器（221）被配置为从激光源（201）接收光，并将两个角度分离和正交偏振光束（223）传递到光调制器（203），以便减少当图像（206）被显示在显示表面（207）上。

9. 发明申请

US20130016321A1 Active Polarization Switch for Speckle Reduction in Laser Projection Sources 有权
标题翻译：激光投影源减少斑点的有源极化开关
公开(公告)号：US20130016321A1
公开(公告)日：2013-01-17
申请号：US13179828
申请日：2011-07-11
申请人： Markus Duelli , Mark O. Freeman , Christian Dean DeJong , Alban N. Lescure
发明人： Markus Duelli , Mark O. Freeman , Christian Dean DeJong , Alban N. Lescure
IPC分类号： G02B27/48 , G02F1/01 , G02B26/10 , G03B21/14
CPC分类号： G02B27/286 , G02B27/48 , G03B21/2033 , G03B21/208 , H04N9/3129 , H04N9/3167
摘要： A laser-based imaging system (200) is configured to reduce perceived speckle in images (201). The imaging system (200) includes one or more laser sources (207), a light modulator (204) configured to produce the images (201) with light (205) from the laser sources (207), and one or more active polarization switches (206) disposed in an optical path of the imaging system (200). The active polarization switch (206) is configured to alternate a polarization orientation of the light in synchrony with an image refresh cycle of the system. The active polarization switch can be clocked in accordance with a clocking angle to optimize speckle reduction. Additionally, one or more light preconditioners (991,992) may be used to help optimize speckle reduction.
摘要翻译：基于激光的成像系统（200）被配置为减少图像中感知到的斑点（201）。成像系统（200）包括一个或多个激光源（207），配置成用来自激光源（207）的光（205）产生图像（201）的光调制器（204）和一个或多个有源极化开关（206）设置在成像系统（200）的光路中。主动偏振开关（206）被配置为与系统的图像刷新周期同步地交替光的偏振取向。主动偏振开关可以按照时钟角计时，以优化散斑减少。另外，一个或多个光预处理器（991,992）可用于帮助优化散斑减少。

10. 发明申请

US20110149251A1 Diffractive Optical Element Having Periodically Repeating Phase Mask and System for Reducing Perceived Speckle 有权
$Diffractive Optical Element Having Periodically Repeating Phase Mask and System for Reducing Perceived Speckle$
标题翻译：具有周期性重复相位掩模和减少感知斑点的系统的衍射光学元件
公开(公告)号：US20110149251A1
公开(公告)日：2011-06-23
申请号：US12643914
申请日：2009-12-21
申请人： Markus Duelli , Alban N. Lescure , Mark O. Freeman , Christian Dean DeJong , Joshua M. Hudman
发明人： Markus Duelli , Alban N. Lescure , Mark O. Freeman , Christian Dean DeJong , Joshua M. Hudman
IPC分类号： G03B21/14 , G02B27/48
CPC分类号： G02B27/48 , G03B21/14 , G03B21/2053
摘要： A optical apparatus (201) for use in an laser imaging system (200) is provided. The optical apparatus (201) includes one or more optical elements (215) that are configured to create an intermediate image plane (217) in the laser imaging system (200). A diffractive optical element (216) is then disposed at the intermediate image plane (217) to reduce speckle. The diffractive optical element (216) includes a periodically repeating phase mask (218) that can be configured in accordance with steps, vortex functions, Hermite-Gaussian functions, and so forth. Smooth grey-level phase transitional surface (337) can be placed between elements (333,334) to improve brightness and image quality. The periodically repeating phase mask (218) makes manufacture simple by reducing alignment sensitivity, and can be used to make applicable safety standards easier to meet as well.
摘要翻译：提供一种用于激光成像系统（200）的光学装置（201）。光学装置（201）包括被配置为在激光成像系统（200）中产生中间像平面（217）的一个或多个光学元件（215）。然后将衍射光学元件（216）设置在中间像平面（217）处以减少斑点。衍射光学元件（216）包括可根据步骤配置的周期性重复相位掩模（218），涡旋函数，Hermite-高斯函数等。可以将平滑的灰度级相位过渡表面（337）放置在元件（333,334）之间，以提高亮度和图像质量。周期性重复相位掩模（218）通过降低对准灵敏度使制造变得简单，并且可以用于使适用的安全标准更容易满足。

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