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公开(公告)号：US10197715B1
公开(公告)日：2019-02-05
申请号：US15198026
申请日：2016-06-30
Inventor： Nelson V. Tabirian , Svetlana V. Serak , Diane M. Steeves , Brian R. Kimball , David E. Roberts
Abstract: Methods of fabricating optical lenses and mirrors, systems and composite structures based on diffractive waveplates, and fields of application of said lenses and mirrors that include imaging systems, astronomy, displays, polarizers, optical communication and other areas of laser and photonics technology. Diffractive lenses and mirrors of shorter focal length and larger size, with more closely spaced grating lines, and with more exacting tolerances on the optical characteristics, can be fabricated than could be fabricated by previous methods.
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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
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.
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公开(公告)号：US10036886B2
公开(公告)日：2018-07-31
申请号：US15419558
申请日：2017-01-30
Applicant: The United States of America 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
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.
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公开(公告)号：US09715048B2
公开(公告)日：2017-07-25
申请号：US14739240
申请日：2015-06-15
Applicant: The United States of America 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
CPC classification number: G02B5/1828 , G02B5/1866 , G02B27/4272 , G02B27/44
Abstract: Optical systems for controlling with propagation of light beams in lateral and angular space, and through optical apertures. The light beams include laser beams as well as beams with wide spectrum of wavelengths and large divergence angles. The 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.
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Patent Agency Ranking
公开(公告)号：US09617205B2
公开(公告)日：2017-04-11
申请号：US14810589
申请日：2015-07-28
Applicant: The United States of America 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 , Rafael O Vergara
IPC: B29D11/00 , G02F1/1337 , C07C245/08 , C09B33/044 , C09K19/56 , C09K19/60
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.
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6.发明授权公开(公告)号：US10031424B2
公开(公告)日：2018-07-24
申请号：US14810569
申请日：2015-07-28
Applicant: The United States of America 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
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.
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7.发明授权公开(公告)号：US09983479B2
公开(公告)日：2018-05-29
申请号：US14048557
申请日：2013-10-08
Applicant: The United States of America 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
CPC classification number: G03F7/20 , G02B5/3083 , G02B5/32 , G03H2001/0439 , G03H2260/51
Abstract: An apparatus and method for fabricating high quality one- or two-dimensional diffractive waveplates and arrays that exhibit high diffraction efficiency and capable of inexpensive large volume production. A generally non-holographic and aperiodic polarization converter for converting the polarization of a coherent input light beam of a visible wavelength into a pattern of continuous spatial modulation at the output of the polarization converter. A photoresponsive material characterized by an anisotropy axis according to polarization of the light beam is exposed to a polarization modulation pattern and coated subsequently with an anisotropic material overlayer with ability of producing an optical axis orientation according to and under the influence of the anisotropy axis of the photoresponsive material layer. The diffractive waveplates are obtained when exposure time of photoresponsive material layer exceeds an order of magnitude the time period that is known to produce spatially homogeneous orientation of the anisotropic overlayer.
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公开(公告)号：US09658512B2
公开(公告)日：2017-05-23
申请号：US14165615
申请日：2014-01-28
Applicant: The United States of America 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: G02F1/29 , G02F1/1343
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.
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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
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。
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