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1. 发明授权

US06259556B1 Optical fibre amplifier having a controlled gain 有权
标题翻译：具有受控增益的光纤放大器
公开(公告)号：US06259556B1
公开(公告)日：2001-07-10
申请号：US09282186
申请日：1999-03-31
申请人： Dirk Lutz , Peter Blixt
发明人： Dirk Lutz , Peter Blixt
IPC分类号： H01S300
CPC分类号： H04B10/296 , H01S3/1301 , H04B10/077 , H04B10/07955 , H04J14/0221
摘要： An optical fiber amplifier for WDM-signals comprises an active optical fiber pumped with pumping light from a pump source. In order to give the amplifier a constant gain for the WDM-signals irrespectively of the number of active WDM-signals an additional light source is arranged to inject, when required, extra light into the active optical fiber, at least in a portion thereof, through a power combiner. The injected light has a wavelength different from that of the WDM-channels and preferably longer so that it will not cause an amplifying or pumping effect in the active optical fiber but so that it still can be amplified in the active fiber. The light source is controlled by a signal derived from an output power measurement device so that it will inject extra light when a WDM-channel becomes inactive. The power of the extra light is thus selected to saturate the optical fiber amplifier at a constant gain irrespectively of the number of signal channels, i.e. of the total power of the input light signals. A light filter can be connected to the output end of the active optical fiber to block light having a wavelength corresponding to the wavelength of the light issued from the light source. Controlling the gain by such injection of “extra signal light” is much quicker than controlling the power of the pumping light.
摘要翻译：用于WDM信号的光纤放大器包括用来自泵浦源的泵浦光泵浦的有源光纤。为了给予放大器对于WDM信号的恒定增益，无论有源WDM信号的数量如何，附加光源被设置成当需要时，至少在其一部分中向有源光纤注入额外的光，通过功率组合器。注入的光具有与WDM通道不同的波长，并且优选地更长，使得其不会在有源光纤中引起放大或泵浦效应，而是仍然可以在有源光纤中被放大。光源由来自输出功率测量装置的信号控制，使得当WDM通道变为不活动时，它将注入额外的光。因此，额外的光的功率被选择为以恒定的增益使光纤放大器饱和，而与信号通道的数量，即输入光信号的总功率无关。光滤波器可以连接到有源光纤的输出端，以阻挡具有对应于从光源发出的光的波长的波长的光。通过这种注入“额外的信号光”来控制增益比控制泵浦光的功率要快得多。

2. 发明授权

US06414787B1 Optical fiber amplifier having a gain flattening filter 有权
公开(公告)号：US06414787B1
公开(公告)日：2002-07-02
申请号：US09282185
申请日：1999-03-31
申请人： Dirk Lutz , Peter Blixt
发明人： Dirk Lutz , Peter Blixt
IPC分类号： H01S306
摘要： An optical fiber amplifier of the erbium type is intended to amplify light signals within a wavelength band, e.g. in the range of 1540-1555 mm. The active optical fiber receives light signals to be amplified and pump light of a first pump wavelength from a pump source. A gain flattening filter is connected in the active optical fiber length. A noise filter is also connected in the active optical fiber, not more closer to the output end of the active fiber the gain flattening filter. The noise filter blocks light waves having wavelengths around the ASE gain peak and the gain filter attenuates wavelengths within the useful signal band in order to produce a flat gain curve. The introduction of the noise filter increases the total amplification of the amplifier.

3. 发明申请

US20110279666A1 DETECTION OF GAZE POINT ASSISTED BY OPTICAL REFERENCE SIGNAL 有权
标题翻译：通过光学参考信号检测大角度点
公开(公告)号：US20110279666A1
公开(公告)日：2011-11-17
申请号：US13145636
申请日：2009-01-26
申请人： Johan Strömbom , Simon Gustafsson , Marten Skogo , John Mikael Holtz Elvesjö , Per Nystedt , Peter Blixt
发明人： Johan Strömbom , Simon Gustafsson , Marten Skogo , John Mikael Holtz Elvesjö , Per Nystedt , Peter Blixt
IPC分类号： H04N7/18
CPC分类号： G06K9/00604 , A61B3/113 , G06F19/00 , H04N7/18
摘要： A gaze-point detection system includes at least one infrared (IR) signal source to be placed in a test scene as a reference point, a pair of eye glasses to be worn by a person, and a data processing and storage unit for calculating a gaze point of the person wearing the pair of eye glasses. The pair of eye glasses includes an image sensor, an eye-tracking unit and a camera. The image sensor detects IR signals from the at least one IR signal source and generates an IR signal source tracking signal. The eye-tracking unit determines adapted to determine the gaze direction of the person and generates an eye-tracking signal, and the camera acquires a test scene picture. The data processing and storage unit communicates with the pair of eye glasses and calculates the gaze point relative to the test scene picture.
摘要翻译：注视点检测系统包括要放置在作为参考点的测试场景中的至少一个红外（IR）信号源，要由人佩戴的一副眼镜，以及用于计算一个戴着眼镜的人的目光点。一对眼镜包括图像传感器，眼睛跟踪单元和照相机。图像传感器检测来自至少一个IR信号源的IR信号，并产生IR信号源跟踪信号。眼睛跟踪单元确定适于确定人的凝视方向并产生眼睛跟踪信号，并且相机获取测试场景图像。数据处理和存储单元与一对眼镜通信，并相对于测试场景图像计算凝视点。

4. 发明授权

US08976110B2 Power management in an eye-tracking system 有权
标题翻译：眼睛跟踪系统中的电源管理
公开(公告)号：US08976110B2
公开(公告)日：2015-03-10
申请号：US13283224
申请日：2011-10-27
申请人： Henrik Eskilsson , Mårten Skogö , John Elvesjö , Peter Blixt
发明人： Henrik Eskilsson , Mårten Skogö , John Elvesjö , Peter Blixt
IPC分类号： G09G5/00
CPC分类号： H04N5/23241 , G02B27/0172 , G02B2027/0138 , G06F3/013 , G06K9/00597 , G09G2330/021 , G09G2354/00 , H04N5/23245
摘要： A personal computer system includes a visual display, an imaging device adapted to provide eye-tracking data by imaging the face of a viewer of the visual display, and an input device for accepting eye-tracking control data and other input data. The imaging device is switchable between at least an active mode, a ready mode and an idle mode, and the switching time from the idle mode to the active mode is longer than the switching time from the ready mode to the active mode. The eye-tracking data provided in the ready mode may include eye position but not eye orientation. The system may include a dedicated input device for forcing the imaging device into active mode by directly triggering an interrupt; alternatively, the dedicated input device forces it permanently into idle mode.
摘要翻译：个人计算机系统包括视觉显示器，适于通过对视觉显示器的观看者的脸进行成像来提供眼睛跟踪数据的成像装置，以及用于接受眼睛跟踪控制数据和其他输入数据的输入装置。成像装置可以在至少活动模式，就绪模式和空闲模式之间切换，并且从空闲模式到活动模式的切换时间长于从就绪模式到活动模式的切换时间。在就绪模式中提供的眼睛跟踪数据可以包括眼睛位置，但不包括眼睛定位。该系统可以包括用于通过直接触发中断来迫使成像装置进入活动模式的专用输入装置; 或者，专用输入设备强制其永久地进入空闲模式。

5. 发明申请

US20120327101A1 VISUAL DISPLAY WITH ILLUMINATORS FOR GAZE TRACKING 有权
标题翻译：带有照明灯的视觉显示器
公开(公告)号：US20120327101A1
公开(公告)日：2012-12-27
申请号：US13465245
申请日：2012-05-07
申请人： Peter Blixt , Anders Hoglund , John Elvesjö
发明人： Peter Blixt , Anders Hoglund , John Elvesjö
IPC分类号： G09G5/02 , G09G3/36
CPC分类号： G06F3/013 , A61B3/113 , G01S17/46 , G01S17/66 , G06F3/01 , G06K9/00604
摘要： A visual display characterized by hidden reference illuminators is adapted to emit invisible light for generating corneo-scleral reflections on an eye watching a screen surface of the display. The tracking of such reflections and the pupil center provides input for gaze tracking. A method for equipping and an LCD with a reference illuminator are also provided. A system and method for determining a gaze point of an eye watching a visual display comprising reference illuminators are further provided. The determination of the gaze point may be based on an ellipsoidal cornea model.
摘要翻译：特征在于隐藏参考照明器的视觉显示器适于发射不可见的光，以在观看显示器的屏幕表面的眼睛上产生角膜巩膜反射。跟踪这种反射和瞳孔中心为注视跟踪提供输入。还提供了一种用于装备的方法和具有参考照明器的LCD。还提供了一种用于确定观看包括参考照明器的视觉显示器的眼睛的凝视点的系统和方法。注视点的确定可以基于椭圆形角膜模型。

6. 发明授权

US09495589B2 Detection of gaze point assisted by optical reference signal 有权
标题翻译：通过光学参考信号辅助的视线点检测
公开(公告)号：US09495589B2
公开(公告)日：2016-11-15
申请号：US13145636
申请日：2009-01-26
申请人： Johan Strombom , Marten Skogo , Per Nystedt , Simon Gustafsson , John Mikael Holtz Elvesjö , Peter Blixt
发明人： Johan Strombom , Marten Skogo , Per Nystedt , Simon Gustafsson , John Mikael Holtz Elvesjö , Peter Blixt
IPC分类号： H04N7/18 , G06K9/00 , A61B3/113
CPC分类号： G06K9/00604 , A61B3/113 , G06F19/00 , H04N7/18
摘要： A gaze-point detection system includes at least one infrared (IR) signal source to be placed in a test scene as a reference point, a pair of eye glasses to be worn by a person, and a data processing and storage unit for calculating a gaze point of the person wearing the pair of eye glasses. The pair of eye glasses includes an image sensor, an eye-tracking unit and a camera. The image sensor detects IR signals from the at least one IR signal source and generates an IR signal source tracking signal. The eye-tracking unit determines adapted to determine the gaze direction of the person and generates an eye-tracking signal, and the camera acquires a test scene picture. The data processing and storage unit communicates with the pair of eye glasses and calculates the gaze point relative to the test scene picture.
摘要翻译：注视点检测系统包括要放置在作为参考点的测试场景中的至少一个红外（IR）信号源，要由人佩戴的一副眼镜，以及用于计算一个戴着眼镜的人的目光点。一对眼镜包括图像传感器，眼睛跟踪单元和照相机。图像传感器检测来自至少一个IR信号源的IR信号，并产生IR信号源跟踪信号。眼睛跟踪单元确定适于确定人的凝视方向并产生眼睛跟踪信号，并且相机获取测试场景图像。数据处理和存储单元与一对眼镜通信，并相对于测试场景图像计算凝视点。

7. 发明授权

US08610768B2 Eye detection unit using sequential data flow 有权
标题翻译：眼睛检测单元使用顺序数据流
公开(公告)号：US08610768B2
公开(公告)日：2013-12-17
申请号：US12833575
申请日：2010-07-09
申请人： Johnny Holmberg , Peter Blixt , John Elvesjö
发明人： Johnny Holmberg , Peter Blixt , John Elvesjö
IPC分类号： H04N7/18
CPC分类号： G06F3/013 , A61B3/113 , G06K9/00604
摘要： The invention generally relates to systems and methods for eye detection for use in, for example, installations and systems for tracking eyes and gaze angle/directions. The system includes a plurality of eye detection units connected to an image sensor. The eye detection units are adapted to receive regions of picture elements of a digital image frame substantially in parallel and wherein the eye detection units are adapted to operate substantially in parallel, each eye detection unit being adapted to receive a specified region of the picture elements of at least one digital image frame and including an eye feature extraction module adapted to perform a eye feature extraction process on the received picture elements to identify predetermined eye features. An eye data generating module is adapted to receive information of potential identified eye features including picture element coordinates for the identified eye features, and the received region of picture elements, and generate eye data based on the information of potential eye features, wherein the eye data is generated if identified eye features fulfill predetermined conditions, and transfer generated eye data and the received regions of picture elements to a processing module, and wherein a data flow of the eye data and the region of picture elements of a digital image frame is substantially parallel.
摘要翻译：本发明一般涉及用于例如用于跟踪眼睛和注视角度/方向的装置和系统中的用于眼睛检测的系统和方法。该系统包括连接到图像传感器的多个眼睛检测单元。眼睛检测单元适于基本并行地接收数字图像帧的图像元素的区域，并且其中眼睛检测单元适于基本并行地操作，每个眼睛检测单元适于接收图像元素的指定区域至少一个数字图像帧，并且包括适于对所接收的图像元素执行眼睛特征提取处理以识别预定的眼睛特征的眼睛特征提取模块。眼数据生成模块适于接收包括识别的眼睛特征的图像元素坐标和图像元素的接收区域的潜在识别的眼睛特征的信息，并且基于潜在的眼睛特征的信息生成眼睛数据，其中眼睛数据如果识别出的眼睛特征满足预定条件，则生成眼图数据和图像的接收区域到处理模块，并且其中数据图像帧的眼睛数据和像素区域的数据流基本上是平行的。

8. 发明授权

US08562136B2 Visual display with illuminators for gaze tracking 有权
标题翻译：视觉显示与照明器注视跟踪
公开(公告)号：US08562136B2
公开(公告)日：2013-10-22
申请号：US13465245
申请日：2012-05-07
申请人： Peter Blixt , Anders Hoglund , Bengt Rehnstrom , John Elvesjö
发明人： Peter Blixt , Anders Hoglund , Bengt Rehnstrom , John Elvesjö
IPC分类号： A61B3/14 , A61B3/00
CPC分类号： G06F3/013 , A61B3/113 , G01S17/46 , G01S17/66 , G06F3/01 , G06K9/00604
摘要： A visual display characterized by hidden reference illuminators is adapted to emit invisible light for generating corneo-scleral reflections on an eye watching a screen surface of the display. The tracking of such reflections and the pupil center provides input for gaze tracking. A method for equipping and an LCD with a reference illuminator are also provided. A system and method for determining a gaze point of an eye watching a visual display comprising reference illuminators are further provided. The determination of the gaze point may be based on an ellipsoidal cornea model.
摘要翻译：特征在于隐藏参考照明器的视觉显示器适于发射不可见的光，以在观看显示器的屏幕表面的眼睛上产生角膜巩膜反射。跟踪这种反射和瞳孔中心为注视跟踪提供输入。还提供了一种用于装备的方法和具有参考照明器的LCD。还提供了一种用于确定观看包括参考照明器的视觉显示器的眼睛的凝视点的系统和方法。注视点的确定可以基于椭圆形角膜模型。

9. 发明申请

US20110013007A1 EYE DETECTION UNIT USING SEQUENTIAL DATA FLOW 有权
标题翻译：使用顺序数据流的眼睛检测单元
公开(公告)号：US20110013007A1
公开(公告)日：2011-01-20
申请号：US12833575
申请日：2010-07-09
申请人： JOHNNY HOLMBERG , Peter Blixt , John Elvesjö
发明人： JOHNNY HOLMBERG , Peter Blixt , John Elvesjö
IPC分类号： H04N7/18
CPC分类号： G06F3/013 , A61B3/113 , G06K9/00604
摘要： The invention generally relates to systems and methods for eye detection for use in, for example, installations and systems for tracking eyes and gaze angle/directions. The system includes a plurality of eye detection units connected to an image sensor. The eye detection units are adapted to receive regions of picture elements of a digital image frame substantially in parallel and wherein the eye detection units are adapted to operate substantially in parallel, each eye detection unit being adapted to receive a specified region of the picture elements of at least one digital image frame and including an eye feature extraction module adapted to perform a eye feature extraction process on the received picture elements to identify predetermined eye features. An eye data generating module is adapted to receive information of potential identified eye features including picture element coordinates for the identified eye features, and the received region of picture elements, and generate eye data based on the information of potential eye features, wherein the eye data is generated if identified eye features fulfil predetermined conditions, and transfer generated eye data and the received regions of picture elements to a processing module, and wherein a data flow of the eye data and the region of picture elements of a digital image frame is substantially parallel.
摘要翻译：本发明一般涉及用于例如用于跟踪眼睛和注视角度/方向的装置和系统中的用于眼睛检测的系统和方法。该系统包括连接到图像传感器的多个眼睛检测单元。眼睛检测单元适于基本并行地接收数字图像帧的图像元素的区域，并且其中眼睛检测单元适于基本并行地操作，每个眼睛检测单元适于接收图像元素的指定区域至少一个数字图像帧，并且包括适于对所接收的图像元素执行眼睛特征提取处理以识别预定的眼睛特征的眼睛特征提取模块。眼数据生成模块适于接收包括识别的眼睛特征的图像元素坐标和图像元素的接收区域的潜在识别的眼睛特征的信息，并且基于潜在的眼睛特征的信息生成眼睛数据，其中眼睛数据如果识别出的眼睛特征满足预定条件，则生成眼图数据和图像的接收区域到处理模块，并且其中数据图像帧的眼睛数据和像素区域的数据流基本上是平行的。

10. 发明申请

US20140293226A1 EYE-TRACKER ILLUMINATION 有权
标题翻译：眼睛跟踪器照明
公开(公告)号：US20140293226A1
公开(公告)日：2014-10-02
申请号：US14131657
申请日：2012-06-14
申请人： Richard Hainzl , Mattias Kuldkepp , Peter Blixt , Mårten Skogö
发明人： Richard Hainzl , Mattias Kuldkepp , Peter Blixt , Mårten Skogö
IPC分类号： A61B3/113 , G06F3/01
CPC分类号： A61B3/113 , G02B5/18 , G02B27/0093 , G06F3/013 , G06K9/00604
摘要： A subject (180) is illuminated whose movements of at least one eye are to be registered by an eye-tracker for producing resulting data (DEYE). To this aim, a coherent light source in light producing means (140) produces at least one well-defined light beam (L1, L2). A diffractive optical element is arranged between the coherent light source and an output from the light producing means (140). The diffractive optical element is configured to direct a light beam (L1) towards at least a first designated area (A1) estimated to cover the at least one eye of the subject (180). Image registering means (150) registers light from the at least one light beam (L1, L2) having been reflected against the subject (180). The resulting data (DEYE) are produced in response to these light reflections, which resulting data (DEYE) represent movements of the at least one eye of the subject (180).
摘要翻译：对被摄体（180）进行照明，其中至少一只眼睛的移动将由眼睛跟踪器注册以产生结果数据（DEYE）。为此目的，在光产生装置（140）中的相干光源产生至少一个明确定义的光束（L1，L2）。衍射光学元件布置在相干光源和来自光产生装置（140）的输出之间。衍射光学元件被配置为将光束（L1）引导至估计为覆盖被摄体（180）的至少一只眼睛的至少第一指定区域（A1）。图像记录装置（150）记录来自已经反射到被摄体（180）的至少一个光束（L1，L2）的光。产生的数据（DEYE）是响应于这些光反射产生的，所得到的数据（DEYE）表示对象的至少一只眼睛的运动（180）。

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