公开(公告)号：US20170139203A1

公开(公告)日：2017-05-18

申请号：US15419558

申请日：2017-01-30

Applicant: U.S. Government as Represented by the Secretary of the Army ,  Beam Engineering for Advanced Measurements Co.

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

IPC: G02B26/08 ,  G02B27/09 ,  G02B27/42 ,  G02B5/18

CPC classification number: G02B26/0808 ,  G02B5/1828 ,  G02B5/1866 ,  G02B27/0944 ,  G02B27/4261 ,  G02B27/4272

Abstract: Pointing and positioning system of light beams and images including a plurality of cycloidal diffractive waveplates, each waveplate capable of deviating a generally broadband light beam over a predetermined angle. The lateral translation and deviation angles of the light beams are controlled by controlling the relative distance, rotational position, and the diffraction efficiency of at least one in the plurality of waveplates.

公开(公告)号：US20160026092A1

公开(公告)日：2016-01-28

申请号：US14810569

申请日：2015-07-28

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: 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.

公开(公告)号：US20140252666A1

公开(公告)日：2014-09-11

申请号：US14203630

申请日：2014-03-11

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 ,  Rafael O. Vergara

IPC: B29D11/00 ,  C07C245/10

CPC classification number: C07C245/08 ,  B29D11/00788 ,  C09B33/044 ,  C09K19/56 ,  C09K19/601 ,  C09K2219/03 ,  G02F1/133711 ,  G02F1/133788

Abstract: A method of fabricating a liquid crystal polymer film includes providing a support substrate having a surface having a shape arranged to define a form of a liquid crystal polymer film to be fabricated; applying a layer of a photoaligning material over the surface of the support substrate, the photoaligning material having an absorption band; exposing the layer of photoaligning material to a light having a linear polarization and the light comprising a wavelength within the absorption band to convert the layer of photoaligning material into a layer of photoaligned material; applying a layer of a polymerizable liquid crystal over the layer of photoaligned material; performing photopolymerization of the layer of polymerizable liquid crystal to form a liquid crystal polymer film; applying a solvent to the layer of photoaligned material, the solvent formulated to dissolve the photoaligned material to thereby release the liquid crystal polymer film from the support substrate; and removing the liquid crystal polymer film from the support substrate.

Abstract translation: 一种制造液晶聚合物膜的方法包括提供一种支撑基板，该支撑基板具有形状被布置以限定要制造的液晶聚合物膜的形式的表面; 在支撑基板的表面上施加一层光致化学材料，该光致化学材料具有吸收带; 将所述光致化学材料层暴露于具有线性偏振的光，并且所述光包括所述吸收带内的波长，以将所述光致化学材料层转化为光致偏光材料层; 在可光化的材料层上涂覆可聚合液晶层; 进行可聚合液晶层的光聚合以形成液晶聚合物膜; 将溶剂施加到光致化学材料层上，配制溶剂以溶解光致偏光材料，从而从支撑衬底释放液晶聚合物膜; 并从支撑基板上除去液晶聚合物膜。

公开(公告)号：US09557456B2

公开(公告)日：2017-01-31

申请号：US14162809

申请日：2014-01-24

Applicant: U.S. Government as represented by the Secretary of the Army ,  Beam Engineering for Advanced Measurements Co.

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

IPC: G02B5/18 ,  G02B26/08 ,  G02B27/42

CPC classification number: G02B26/0808 ,  G02B5/1828 ,  G02B5/1866 ,  G02B27/0944 ,  G02B27/4261 ,  G02B27/4272

Abstract: Pointing and positioning system of light beams and images including a plurality of cycloidal diffractive waveplates, each waveplate capable of deviating a generally broadband light beam over a predetermined angle. The lateral translation and deviation angles of the light beams are controlled by controlling the relative distance, rotational position, and the diffractive efficiency of a least one in the plurality of waveplates.

Abstract translation: 包括多个摆线衍射波片的光束和图像的指向和定位系统，每个波片能够使普通宽带光束偏离预定角度。 通过控制多个波片中的至少一个的相对距离，旋转位置和衍射效率来控制光束的横向平移和偏离角度。

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。

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。

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。

公开(公告)号：US20140285893A1

公开(公告)日：2014-09-25

申请号：US13916627

申请日：2013-06-13

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

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。

公开(公告)号：US20140092373A1

公开(公告)日：2014-04-03

申请号：US14048557

申请日：2013-10-08

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: G03F7/20 ,  G02B5/3083 ,  G02B5/32 ,  G03H2001/0439 ,  G03H2260/51

Abstract: An apparatus and method is presented for fabricating high quality one- or two dimensional diffractive waveplates and their arrays that exhibit high diffraction efficiency over large area and being capable of inexpensive large volume production. Employed is a generally non-holographic and aperiodic polarization converter for converting the polarization of a coherent input light beam that may be of a visible wavelength into a pattern of continuous spatial modulation at the output of said polarization converter. A photoresponsive material characterized by an anisotropy axis that may be formed or aligned according to polarization of said light beam is exposed to said polarization modulation pattern and may be coated subsequently with an anisotropic material overlayer.

Abstract translation: 提出了一种用于制造高质量一维或二维衍射波片及其阵列的装置和方法，其在大面积上表现出高的衍射效率并且能够廉价的大批量生产。 采用通常是非全息和非周期偏振转换器，用于将可能是可见波长的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连续空间调制图案。 特征在于可根据所述光束的偏振而形成或取向的各向异性轴的光响应材料暴露于所述偏振调制图案，随后可以用各向异性材料覆层进行涂覆。