公开(公告)号：US07715084B2

公开(公告)日：2010-05-11

申请号：US12424168

申请日：2009-04-15

申请人： Kim L. Tan ,  David M. Shemo ,  Scott McEldowney

发明人： Kim L. Tan ,  David M. Shemo ,  Scott McEldowney

IPC分类号： G02F1/01 ,  H01S3/10

CPC分类号： G02B27/48 ,  G02B27/286 ,  H04N9/3126 ,  H04N9/3161 ,  Y10S359/90

摘要： A method and apparatus for reducing speckle in a laser illumination system uses a despeckle device including an optical retarder providing an odd integer multiple of substantially half-wave retardation for light emitted from a coherent laser in the laser illumination system. The near half-wave optical retarder has a substantially constant retardance and a spatially varied slow axis. The spatially varied slow axis imposes a phase mask on the beam of light, which provides sub-resolution optical phase modulation to a resolution spot on the detector. The near half-wave optical retarder is actuated mechanically or electrically to vary the sub-resolution optical phase modulation within an integration time of the detector.

摘要翻译： 一种用于减少激光照射系统中的散斑的方法和装置，使用了一种去斑装置，它包括一个光学延迟器，为激光照射系统中的相干激光发出的光提供了实质上半波延迟的奇整数倍。 近半波延迟器具有基本恒定的延迟和空间上变化的慢轴。 空间变化的慢轴在光束上施加相位掩模，其向检测器上的分辨率点提供亚分辨率的光相位调制。 靠近半波长的光学延迟器被机械或电气地驱动以在检测器的积分时间内改变子分辨率的光学相位调制。

公开(公告)号：US20100066929A1

公开(公告)日：2010-03-18

申请号：US12556694

申请日：2009-09-10

申请人： David M. Shemo ,  Scott McEldowney

发明人： David M. Shemo ,  Scott McEldowney

IPC分类号： G02F1/1335 ,  G03F7/20

CPC分类号： G02B5/3083

摘要： A micro-array of optical vortex retarders is provided by forming an alignment layer having a plurality of discrete alignment patches with different orientations. A layer of birefringent material, including one of a liquid crystal and a liquid crystal polymer precursor material, is provided adjacent to the alignment layer. The aligning orientation and position of each discrete alignment patch in the plurality of discrete alignment patches is selected to induce the layer of birefringent material to form at least one optical vortex retarder adjacent to a substantially non-oriented region of the alignment layer.

摘要翻译： 通过形成具有不同取向的多个离散对准贴片的取向层来提供光学涡旋延迟器的微阵列。 在取向层附近设置包括液晶和液晶聚合物前体材料之一的双折射材料层。 选择多个离散对准贴片中的每个离散对准贴片的对准方向和位置以诱导双折射材料层，以形成与取向层的基本上非取向区域相邻的至少一个光学涡旋延迟器。

公开(公告)号：US08373810B2

公开(公告)日：2013-02-12

申请号：US12556694

申请日：2009-09-10

申请人： David M. Shemo ,  Scott McEldowney

发明人： David M. Shemo ,  Scott McEldowney

IPC分类号： G02F1/1335 ,  G02F1/135 ,  G02F1/1337 ,  G02F1/13 ,  H01L21/00

CPC分类号： G02B5/3083

摘要： A micro-array of optical vortex retarders is provided by forming an alignment layer having a plurality of discrete alignment patches with different orientations. A layer of birefringent material, including one of a liquid crystal and a liquid crystal polymer precursor material, is provided adjacent to the alignment layer. The aligning orientation and position of each discrete alignment patch in the plurality of discrete alignment patches is selected to induce the layer of birefringent material to form at least one optical vortex retarder adjacent to a substantially non-oriented region of the alignment layer.

摘要翻译： 通过形成具有不同取向的多个离散对准贴片的取向层来提供光学涡旋延迟器的微阵列。 在取向层附近设置包括液晶和液晶聚合物前体材料之一的双折射材料层。 选择多个离散对准贴片中的每个离散对准贴片的对准方向和位置以诱导双折射材料层，以形成与取向层的基本上非取向区域相邻的至少一个光学涡旋延迟器。

公开(公告)号：US20080226844A1

公开(公告)日：2008-09-18

申请号：US12045510

申请日：2008-03-10

申请人： David M. Shemo ,  Scott McEldowney ,  Jerry Zieba

发明人： David M. Shemo ,  Scott McEldowney ,  Jerry Zieba

IPC分类号： G02B27/00 ,  C09K19/00

CPC分类号： G03F7/70566 ,  G02B5/3016 ,  G02B5/3083 ,  G02F2413/09 ,  G03F7/70966 ,  Y10T428/10

摘要： The invention provides a space-variant liquid-crystal (LC) photo-aligned waveplate having a vortex optic axis pattern, and an apparatus and method for fabricating thereof. The method in it preferred embodiment includes exposing a substrate coated with a photo-alignable material such as LPP to linearly polarized UV radiation through a wedge-shaped aperture, while rotating two of the aperture, the substrate and the polarization of the UV light, so that an exposure area performs a full rotation about a center point on the substrate, at angular velocities selected so as to form a vortex alignment pattern of a pre-defined order. An LC material is then deposited on the substrate in direct contact with the photo-alignable material so that the LC director is aligned according to the photo-induced vortex alignment pattern. The method enables to fabricate vortex waveplate of any pre-defined vortex order.

摘要翻译： 本发明提供一种具有涡旋光轴图案的空间变异液晶（LC）光取向波片及其制造方法。 在其优选实施例中的方法包括将通过楔形孔的光可对准材料（例如LPP）涂覆的线性偏振UV辐射同时旋转孔径，衬底和UV光的偏振两者，使得 曝光区域以选定的角速度围绕基板上的中心点执行完全旋转，以便形成预定顺序的涡流对准图案。 然后将LC材料沉积在与光可校准材料直接接触的基板上，使得LC导向器根据光诱导的涡流对准图案对准。 该方法能够制造任何预定义的涡流顺序的涡流波片。

公开(公告)号：US09557574B2

公开(公告)日：2017-01-31

申请号：US12796472

申请日：2010-06-08

申请人： Scott McEldowney

发明人： Scott McEldowney

IPC分类号： G02B27/28 ,  G01C3/08 ,  G06F3/03 ,  G02B27/48

CPC分类号： G02B27/286 ,  G01C3/08 ,  G02B27/48 ,  G06F3/0304

摘要： A depth image capture device uses a circular polarization structure positioned at the output of an illumination radiation source, such as a diode laser. A linear polarization element receives the collimated illumination radiation and provides polarized radiation to a quarter wave plate. Radiation exits the quarter wave plate as circularly polarized radiation and is provided to a diffractive optical element outputting a pattern to illuminate a target. A detector receives a reflection of the output pattern from the target.

摘要翻译： 深度图像捕获装置使用位于诸如二极管激光器的照明辐射源的输出处的圆偏振结构。 线性偏振元件接收准直照明辐射并向四分之一波片提供偏振辐射。 辐射作为圆偏振辐射离开四分之一波片，并被提供给衍射光学元件，该衍射光学元件输出用于照射目标的图案。 检测器从目标接收输出图案的反射。

公开(公告)号：US08558873B2

公开(公告)日：2013-10-15

申请号：US12816985

申请日：2010-06-16

申请人： Scott McEldowney

发明人： Scott McEldowney

IPC分类号： H04N15/00 ,  H04N13/02

CPC分类号： G01B11/2513 ,  G01S17/46 ,  G01S17/89 ,  G06F3/017 ,  G06F3/0325

摘要： A 3-D depth camera system, such as in a motion capture system, tracks an object such as a human in a field of view using an illuminator, where the field of view is illuminated using multiple diffracted beams. An image sensing component obtains an image of the object using a phase mask according to a double-helix point spread function, and determines a depth of each portion of the image based on a relative rotation of dots of light of the double-helix point spread function. In another aspect, dual image sensors are used to obtain a reference image and a phase-encoded image. A relative rotation of features in the images can be correlated with a depth. Depth information can be obtained using an optical transfer function of a point spread function of the reference image.

摘要翻译： 诸如在运动捕捉系统中的3-D深度相机系统使用照明器在视野中跟踪诸如人的物体，其中使用多个衍射光束照射视场。 图像感测组件根据双螺旋点扩展函数使用相位掩模获得对象的图像，并且基于双螺旋点展开的光点的相对旋转来确定图像的每个部分的深度 功能。 在另一方面，使用双重图像传感器来获得参考图像和相位编码图像。 图像中特征的相对旋转可以与深度相关联。 可以使用参考图像的点扩散函数的光学传递函数来获得深度信息。

公开(公告)号：US20120300040A1

公开(公告)日：2012-11-29

申请号：US13115705

申请日：2011-05-25

申请人： Scott McEldowney

发明人： Scott McEldowney

IPC分类号： H04N13/02 ,  G03B41/00 ,  G03B15/02

CPC分类号： H04N13/271 ,  G03B2215/0567 ,  H04N13/254

摘要： A three-dimensional imaging system to reduce detected ambient light comprises a wavelength stabilized laser diode to project imaging light onto a scene, an optical bandpass filter, and a camera to receive imaging light reflected from the scene and through the optical bandpass filter, the camera configured to use the received imaging light for generating a depth map of the scene.

公开(公告)号：US20120026085A1

公开(公告)日：2012-02-02

申请号：US13267458

申请日：2011-10-06

申请人： Scott McEldowney

发明人： Scott McEldowney

IPC分类号： G06F3/01

CPC分类号： G06K9/2036 ,  A63F2300/1087 ,  A63F2300/8029 ,  G06K9/2027 ,  G06T5/007 ,  G06T2207/10028 ,  G06T2207/20224

摘要： Embodiments related to the enhancement of contrast in an image pattern in a structured light depth sensor are disclosed. For example, one disclosed embodiment provides, in a structured light depth sensor system comprising a structured light depth sensor, a method comprising projecting a light pattern onto an object, detecting via an image sensor an image of the light pattern as reflected from the object, increasing a contrast of the light pattern relative to ambient light present in the image of the light pattern as reflected from the object to form a contrast-enhanced image of the light pattern as reflected from the object, and based upon a motion of the object as detected via the contrast-enhanced image of the light pattern, controlling an application that is providing output to a display.

摘要翻译： 公开了与结构化光深度传感器中的图像图像中的对比度增强有关的实施例。 例如，一个公开的实施例在包括结构化光深度传感器的结构光深度传感器系统中提供了一种方法，包括将光图案投射到物体上，经由图像传感器检测从物体反射的光图案的图像， 增加光图案相对于从物体反射的光图案的图像中存在的环境光的对比度，以形成从物体反射的光图案的对比度增强图像，并且基于物体的运动 通过光图案的对比度增强图像检测，控制向显示器提供输出的应用。

公开(公告)号：US07763841B1

公开(公告)日：2010-07-27

申请号：US12472941

申请日：2009-05-27

申请人： Scott McEldowney

发明人： Scott McEldowney

IPC分类号： G02B27/42

CPC分类号： G02B27/42 ,  B29D11/0073 ,  B29D11/0074 ,  G02B13/008 ,  G02B13/16 ,  G02B27/425 ,  G02B27/4272

摘要： Embodiments are disclosed herein related to the construction of optical elements for structured light depth sensor systems. One disclosed embodiment provides a depth sensing system with an optical component comprising a first substrate surface, a first optical element formed in a polymer layer disposed on the first substrate surface, a second substrate surface, and a second optical element formed in a polymer layer disposed on the second substrate surface, wherein the second optical element is optically aligned with the first optical element. The depth sensing further comprises a projector configured to provide light to form a pattern to illuminate a target, and a sensor to acquire an image of the pattern.

摘要翻译： 本文公开的实施例涉及用于结构化光深度传感器系统的光学元件的构造。 一个公开的实施例提供了一种深度感测系统，其具有光学部件，该光学部件包括第一基板表面，形成在设置在第一基板表面上的聚合物层中的第一光学元件，第二基板表面和形成在聚合物层中的第二光学元件 在第二基板表面上，其中第二光学元件与第一光学元件光学对准。 深度感测还包括投影仪，其被配置为提供光以形成用于照射目标的图案，以及用于获取图案的图像的传感器。

公开(公告)号：US20150185475A1

公开(公告)日：2015-07-02

申请号：US14140987

申请日：2013-12-26

申请人： Pasi Saarikko ,  Xinye Lou ,  Scott McEldowney ,  Steven Robbins ,  Tapani Levola

发明人： Pasi Saarikko ,  Xinye Lou ,  Scott McEldowney ,  Steven Robbins ,  Tapani Levola

IPC分类号： G06K9/00 ,  G02B6/34 ,  G06F3/01 ,  G02B27/01 ,  G02B6/36

CPC分类号： G02B27/0093 ,  A61B3/113 ,  G02B6/02085 ,  G02B6/34 ,  G02B27/0172 ,  G02B2027/0107 ,  G02B2027/0138 ,  G02B2027/0178 ,  G06F3/013 ,  H04N13/383

摘要： A transparent waveguide for use in eye tracking includes an input-coupler and an output-coupler. The input-coupler comprises a plurality of curved grating lines having a radially varying pitch. When positioned in front of an eye illuminated with infrared light, infrared light beams reflected from the eye and incident on the input-coupler enter the waveguide at the input-coupler, propagate through the waveguide by way of total internal reflections, and exit the waveguide proximate the output-coupler. The radially varying pitch of the curved grating lines of the input-coupler provides angular encoding of infrared light incident on the input-coupler, and more specifically, causes different beams of infrared light incident on respective different horizontal and vertical positions of the input-coupler to propagate through the waveguide at respective different angles of reflection and exit the waveguide at respective different angles of incidence relative to a surface of the waveguide through which infrared light beams exit.

摘要翻译： 用于眼睛跟踪的透明波导包括输入耦合器和输出耦合器。 输入耦合器包括具有径向变化间距的多个弯曲光栅线。 当放置在用红外线照射的眼睛前方时，从眼睛反射并入射到输入耦合器上的红外光束进入输入耦合器处的波导，通过全内反射传播通过波导，并且离开波导 靠近输出耦合器。 输入耦合器的弯曲光栅线的径向变化的间距对入射到输入耦合器上的红外光的角度编码提供了角度编码，更具体地说，使不同的红外光束入射在输入耦合器的不同的水平和垂直位置上 以相应的不同的反射角传播通过波导并以相应的入射角相对于波导的表面离开波导，红外光束通过该表面离开。