中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

15 records (took 0.023 seconds)

    BROADBAND OPTICS FOR MANIPULATING LIGHT BEAMS AND IMAGES
    6.
    发明申请
    BROADBAND OPTICS FOR MANIPULATING LIGHT BEAMS AND IMAGES 有权
    用于操纵光束和图像的宽带光学

    公开(公告)号：US20160033695A1

    公开(公告)日：2016-02-04

    申请号：US14739240

    申请日：2015-06-15

    Applicant: U.S. Government as Represented by the Secretary of the Army

    Inventor： Nelson V. Tabirian ,  Sarik R. Nersisyan ,  Brian R. Kimball ,  Diane M. Steeves

    IPC: G02B5/18 ,  G02B27/42

    CPC classification number: G02B5/1828 ,  G02B5/1866 ,  G02B27/4272 ,  G02B27/44

    Abstract: The objective of the present invention is providing optical systems for controlling with propagation of light beams in lateral and angular space, and through optical apertures. Said light beams include laser beams as well as beams with wide spectrum of wavelengths and large divergence angles. Said optical systems are based on combination of diffractive waveplates with diffractive properties that can be controlled with the aid of external stimuli such as electrical fields, temperature, optical beams and mechanical means.

    Abstract translation: 本发明的目的是提供光学系统，用于通过光束在横向和角度空间中的传播以及通过光学孔径进行控制。 所述光束包括激光束以及具有广谱波长和大发散角的光束。 所述光学系统基于具有衍射特性的衍射波片的组合，其可以借助外部刺激（例如电场，温度，光束和机械装置）来控制。

    CYCLOIDAL DIFFRACTIVE WAVEPLATE AND METHOD OF MANUFACTURE
    7.
    发明申请
    CYCLOIDAL DIFFRACTIVE WAVEPLATE AND METHOD OF MANUFACTURE 有权
    环状衍射波长和制造方法

    公开(公告)号：US20140211145A1

    公开(公告)日：2014-07-31

    申请号：US14165615

    申请日：2014-01-28

    Applicant: U.S. Government as Represented by the Secretary of the Army

    Inventor： Nelson V. Tabirian ,  Sarik R. Nersisyan ,  Brian R. Kimball ,  Diane M. Steeves

    IPC: G02F1/29

    CPC classification number: G02F1/292 ,  G02F1/134363 ,  Y10T29/49155

    Abstract: A cycloidal diffractive waveplate (50) comprising first and second substrate layers (52, 54),a liquid crystal layer (60C, 60H) provided between the first and second substrate layers, and transparent positive electrodes (56) and transparent negative electrodes (58) provided on the first substrate layer. The liquid crystal layer has a diffractive state (60C) in which the optical axes of the liquid crystal molecules are periodically rotated across a plane of the waveplate and a non-diffractive state (60H) in which the optical axes of the liquid crystal molecules are all orientated in the same direction in the plane of the waveplate. The electrodes (56, 58) are arranged in an alternating series, such that when an electric voltage is applied to the electrodes an electric field is produced in the plane of the waveplate and the liquid crystal layer is switched from the diffractive state to the non-diffractive state. A method of manufacturing the cycloidal diffractive waveplate is also provided.

    Abstract translation: 一种摆线衍射波片（50），包括第一和第二基底层（52,54），设置在第一和第二基底层之间的液晶层（60C，60H）和透明正电极（56）和透明负极 ）设置在第一基板层上。 液晶层具有衍射状态（60C），其中液晶分子的光轴在波片的平面周期性地旋转，并且液晶分子的光轴为非衍射状态（60H） 全部在波片的平面中以相同的方向取向。 电极（56,58）以交替的方式排列，使得当向电极施加电压时，在波片的平面中产生电场，并且将液晶层从衍射状态切换到非电场 -diffractive状态。 还提供了制造摆线衍射波片的方法。

    FABRICATION OF HIGH EFFICIENCY, HIGH QUALITY, LARGE AREA DIFFRACTIVE WAVEPLATES AND ARRAYS
    8.
    发明申请
    FABRICATION OF HIGH EFFICIENCY, HIGH QUALITY, LARGE AREA DIFFRACTIVE WAVEPLATES AND ARRAYS 审中-公开
    高效率，高质量，大面积差异波形和阵列的制造

    公开(公告)号：US20130236817A1

    公开(公告)日：2013-09-12

    申请号：US13860934

    申请日：2013-04-11

    Applicant: U.S. GOVERNMENT AS REPRESENTED BY THE SECRETARY OF THE ARMY

    Inventor： Nelson V. Tabirian ,  Sarik R. Nersisyan ,  Brian R. Kimball ,  Diane M. Steeves

    IPC: G03F7/20

    CPC classification number: G03F7/70191 ,  G02B5/3083 ,  G02B5/32 ,  G03F7/20 ,  G03H2001/0439 ,  G03H2260/51

    Abstract: The objective of the present invention is providing a method for fabricating high quality diffractive waveplates and their arrays that exhibit high diffraction efficiency over large area, the method being capable of inexpensive large volume production. The method uses a polarization converter for converting the polarization of generally non-monochromatic and partially coherent input light beam into a pattern of periodic spatial modulation at the output of said polarization converter. A substrate carrying a photoalignment layer is exposed to said polarization modulation pattern and is coated subsequently with a liquid crystalline material. The high quality diffractive waveplates of the present invention are obtained when the exposure time of said photoalignment layer exceeds by generally an order of magnitude the time period that would be sufficient for producing homogeneous orientation of liquid crystalline materials brought in contact with said photoalignment layer. Compared to holographic techniques, the method is robust with respect to mechanical noises, ambient conditions, and allows inexpensive production via printing while also allowing to double the spatial frequency of optical axis modulation of diffractive waveplates.

    Abstract translation: 本发明的目的是提供一种用于制造在大面积上表现出高衍射效率的高质量衍射波片及其阵列的方法，该方法能够廉价地大批量生产。 该方法使用偏振转换器将大致非单色和部分相干输入光束的偏振转换成在所述偏振转换器的输出处的周期性空间调制图案。 承载光电子对准层的衬底暴露于所述偏振调制图案，随后用液晶材料涂覆。 当所述光取向层的曝光时间超过足以产生与所述光对准层接触的液晶材料的均匀取向的时间周期时，可以获得本发明的高质量衍射波片。 与全息技术相比，该方法在机械噪声，环境条件方面是稳健的，并且通过打印允许廉价的生产，同时还允许将衍射波片的光轴调制的空间频率加倍。

Patent Agency Ranking