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：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：US08425042B2

公开(公告)日：2013-04-23

申请号：US12851969

申请日：2010-08-06

申请人： Curtis R. Hruska ,  David M. Shemo ,  Kim Leong Tan

发明人： Curtis R. Hruska ,  David M. Shemo ,  Kim Leong Tan

IPC分类号： G03B21/00

CPC分类号： G02B27/26 ,  G02B26/008 ,  G02B27/286

摘要： A multi-segment optical retarder that can be used with or within a single projector for creating 3D images. The multi-segment optical retarder is coupled to an actuator used to effect some predetermined linear, rotary, or oscillating movement of the multi-segment optical retarder such that a fast axis orientation of each segment is substantially constant relative to itself over time and for a given area of incidence.

摘要翻译： 可以与单个投影机一起使用或用于创建3D图像的多段光学延迟器。 多段光学延迟器耦合到用于实现多段光学延迟器的某些预定的线性，旋转或振荡运动的致动器，使得每个段的快速轴取向在时间上相对于其自身基本恒定，并且对于 给定发病面积。

公开(公告)号：US20090009668A1

公开(公告)日：2009-01-08

申请号：US12166988

申请日：2008-07-02

申请人： Kim Leong Tan ,  David M. Shemo

发明人： Kim Leong Tan ,  David M. Shemo

IPC分类号： G02F1/13 ,  G03H1/02

CPC分类号： G02B5/3016 ,  G02B5/1871 ,  G02B5/32 ,  G02F1/13342 ,  G02F1/133753 ,  G02F2203/07 ,  G03H2240/11 ,  G03H2240/23 ,  G03H2250/38 ,  G11B7/1353 ,  G11B7/13925 ,  G11B2007/0006

摘要： A polarization-selective diffractive optical element includes a liquid crystal polymer film supported by a substrate. The liquid crystal polymer film includes an array of pixels, each pixel encoded with a fixed liquid crystal director such that each liquid crystal director is aligned in a common plane perpendicular to the liquid crystal polymer film and provides a predetermined pattern of out-of-plane tilts. A size of the pixels in the array and the predetermined pattern are selected such that the liquid crystal polymer film forms a phase hologram for diffracting light polarized parallel to said common plane and a zeroth order diffraction grating for light polarized perpendicular to the said common plane. The non-etched and flat phase hologram is suitable for a wide range of applications.

摘要翻译： 偏振选择性衍射光学元件包括由衬底支撑的液晶聚合物膜。 液晶聚合物膜包括像素阵列，每个像素用固定的液晶指示器编码，使得每个液晶指向矢在垂直于液晶聚合物膜的公共平面中排列，并提供预定的平面外的图案 倾斜 选择阵列中的像素和预定图案的大小，使得液晶聚合物膜形成用于衍射平行于所述公共平面的光的相位全息图和用于垂直于所述公共平面偏振的光的零级衍射光栅。 非蚀刻和平面相位全息图适用于广泛的应用。

公开(公告)号：US06355075B1

公开(公告)日：2002-03-12

申请号：US09502336

申请日：2000-02-11

申请人： Katsuyoshi Ina ,  W. Scott Rader ,  David M. Shemo ,  Tetsuji Hori

发明人： Katsuyoshi Ina ,  W. Scott Rader ,  David M. Shemo ,  Tetsuji Hori

IPC分类号： C09K314

CPC分类号： C09G1/02

摘要： A polishing composition comprising an abrasive, an anticorrosive, an oxidizing agent, an acid, a pH regulator and water and having a pH within a range of from 2 to 5, wherein the abrasive is colloidal silica or fumed silica, and its primary particle size is at most 20 nm.

摘要翻译： 一种抛光组合物，其包含研磨剂，防腐蚀剂，氧化剂，酸，pH调节剂和水，并且pH在2至5的范围内，其中所述研磨剂是胶体二氧化硅或热解法二氧化硅，其初级粒度 至多为20nm。

公开(公告)号：US20110027494A1

公开(公告)日：2011-02-03

申请号：US12852105

申请日：2010-08-06

申请人： Kim Leong TAN ,  David M. Shemo

发明人： Kim Leong TAN ,  David M. Shemo

IPC分类号： C08F2/48

CPC分类号： G02B5/3016 ,  B29D11/0074 ,  G02B5/1871 ,  G02B5/32 ,  G02F1/13342 ,  G02F1/133753 ,  G02F2203/07 ,  G03H1/22 ,  G03H2001/2276 ,  G03H2240/11 ,  G03H2240/23 ,  G03H2250/38 ,  G11B7/1353 ,  G11B7/13925 ,  G11B2007/0006

摘要： A method of fabricating an optical element including a liquid crystal layer having a spatially-varying tilt angle includes coating a substrate with a linearly photopolymerizable polymer layer, irradiating the linearly photopolymerizable polymer layer with linearly polarized ultra-violet light at a oblique angle, and coating a layer of liquid crystal material on a surface of the irradiated linearly photopolymerizable polymer layer. The liquid crystal material has a predetermined relationship between its tilt angle and a total dose of the linearly polarized ultra-violet light. The linearly photopolymerizable polymer layer is irradiated with at least one dose of linearly polarized ultra-violet light that is sufficient to induce formation of a plurality of discrete regions within the liquid crystal layer having a larger in-plane birefringence than an adjacent or surrounding region.

摘要翻译： 制造包括具有空间变化倾斜角的液晶层的光学元件的方法包括用线性可光聚合的聚合物层涂覆基板，以线性偏振的紫外线以倾斜的角度照射线性可光聚合的聚合物层， 在被照射线性可光聚合聚合物层的表面上的一层液晶材料。 液晶材料的倾斜角与线偏振紫外光的总剂量之间具有预定的关系。 线性可光聚合聚合物层被照射至少一种线性偏振紫外光，其量足以引起在相邻或周围区域内具有较大面内双折射的液晶层内形成多个离散区域。

公开(公告)号：US20090122402A1

公开(公告)日：2009-05-14

申请号：US12260840

申请日：2008-10-29

申请人： David M. Shemo ,  Jerry M. Zieba

发明人： David M. Shemo ,  Jerry M. Zieba

IPC分类号： G02B5/30 ,  G02B1/08

CPC分类号： G02B27/28 ,  G02B5/3025 ,  G02B5/3083 ,  G02F2413/09

摘要： An achromatic converter of spatial distribution of polarization from a first to a second pre-defined distribution of polarization is described. The converter comprises a plurality of photo-aligned quarter-wave or half-wave liquid crystal polymer layers, wherein the patterns of alignment of the layers are correlated with each other so as to make polarization conversion achromatic. Achromatic polarization vortices can be formed. The polarization conversion efficiencies over 97% have been demonstrated over most of the visible spectrum of light. The polarization converters can be used in imaging, photolithography, optical tweezers, micromachining, and other applications.

摘要翻译： 描述了从第一至第二预定极化分布的偏振空间分布的消色差转换器。 该转换器包括多个光取向四分之一波长或半波长的液晶聚合物层，其中层的排列图案彼此相关，以便使偏振变换无色。 消色差极化旋涡可以形成。 在大多数可见光谱中已经证实了超过97％的偏振转换效率。 偏振转换器可用于成像，光刻，光学镊子，微加工和其他应用。

公开(公告)号：US06332831B1

公开(公告)日：2001-12-25

申请号：US09544287

申请日：2000-04-06

申请人： David M. Shemo ,  W. S. Rader ,  Toshiki Owaki

发明人： David M. Shemo ,  W. S. Rader ,  Toshiki Owaki

IPC分类号： B24B100

CPC分类号： C09K3/1463 ,  C09G1/02

摘要： A polishing composition for a memory hard disk, which comprises at least the following components (a) to (d): (a) from 0.1 to 50 wt %, based on the total amount of the polishing composition, of at least one abrasive selected from the group consisting of silicon dioxide, aluminum oxide, cerium oxide, zirconium oxide, titanium oxide, silicon nitride and manganese dioxide, (b) from 0.001 to 10 wt %, based on the total amount of the polishing composition, of at least one periodate selected from the group consisting of periodic acid, potassium periodate, sodium periodate and lithium periodate, (c) a buffer component to adjust the pH of the polishing composition to a range of from 2 to 5, and (d) water.

摘要翻译： 一种用于存储硬盘的抛光组合物，其至少包含以下组分（a）至（d）：（a））：基于抛光组合物的总量为0.1至50重量％的至少一种研磨剂 来自由二氧化硅，氧化铝，氧化铈，氧化锆，氧化钛，氮化硅和二氧化锰组成的组，（b）基于抛光组合物的总量的0.001至10重量％的至少一种 选自高碘酸，高碘酸钾，高碘酸钠和高碘酸锂的高碘酸盐，（c）将抛光组合物的pH调节至2至5的范围的缓冲组分，和（d）水。