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21.发明授权公开(公告)号：US10436957B2
公开(公告)日：2019-10-08
申请号：US15336336
申请日：2016-10-27
Inventor： Nelson V. Tabirian , Zhi J. Liao , David E. Roberts
IPC: G02B1/10 , G02B5/18 , G02B5/30 , G02B13/00 , G02B23/02 , G02B27/42 , G02B27/00 , G02B7/00 , G02B7/02 , G02B7/182 , G03H1/08
Abstract: Diffractive waveplate lenses, mirrors, devices, systems and methods for performing imaging over a broad spectral band in imaging systems, such as but not limited to astronomical imaging, surveillance imaging, and in communication systems, such as laser communication systems. Corrector mirrors are used with a flat diffractive wave diffractive waveplate lens so that chromatic aberrations of the diffractive waveplate lens are reduced with the imaging system.
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公开(公告)号：US10330947B2
公开(公告)日：2019-06-25
申请号：US15189551
申请日：2016-06-22
Inventor： Nelson V. Tabirian , David E. Roberts
Abstract: Mirrors, lenses, devices, apparatus, systems and methods for correcting temporal dispersion of laser pulses or other pulses of electromagnetic radiation in diffractive telescopes used in applications, such as but not limited to optical telescopes, transmitters, receivers, and transceivers for laser communication and imaging. Diffractive lenses and mirrors allow for producing large area telescopes and reducing or eliminating temporal dispersion of laser pulses and other pulses of electromagnetic radiation recorded by such telescopes. This can be achieved by utilizing high efficiency thin film diffractive optical films, particularly, diffractive waveplates, and having a secondary diffractive mirror of a shape selected to assure that the propagation time from the flat primary collecting lens or mirror is independent of the position on the flat primary collecting lens or mirror at which the radiation impinges.
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公开(公告)号：US10114239B2
公开(公告)日：2018-10-30
申请号：US14214375
申请日：2014-03-14
Applicant: Beam Engineering for Advanced Measurements Co. , The United States of America as Represented by the Secretary of the Army
Inventor： Nelson Tabirian , Svetlana Serak , Diane Steeves , Brian Kimball
IPC: G02F1/01 , G02F1/1337 , G02F1/1333 , G02F1/1343
Abstract: The invention provides for lenses fabricated as planar thin film coatings with continuous structure. The lensing action is due to optical axis orientation modulation in the plane of the lens. The lenses of the current invention are fabricated using photoalignment of a liquid crystal polymer wherein the polarization pattern of radiation used for photoalignment is obtained by propagating the light through an optical system comprising a shape-variant nonlinear spatial light polarization modulators.
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公开(公告)号：US20180059489A9
公开(公告)日：2018-03-01
申请号：US14194808
申请日：2014-03-02
Inventor： Nelson Tabirian
IPC: G02F1/1337
CPC classification number: G02F1/133784 , G02B5/3016 , G02B5/3083
Abstract: Cycloidal boundary conditions for aligning liquid crystalline materials are obtained by mechanical rubbing of a polymer coating. The rubbing is performed by a rubbing head rotating around an axis perpendicular to the rubbing plane while the alignment polymer film is being translated across the rubbing film such as only a linear portion of the alignment film touches the rubbing film at any given time.
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公开(公告)号：US20180003874A9
公开(公告)日：2018-01-04
申请号：US14193027
申请日：2014-02-28
Inventor： Nelson Tabirian , Sarik Nersisyan
CPC classification number: G02B5/3016
Abstract: Method for fabrication of vector vortex waveplates of improved quality due to reduced singularity size and widened spectral band, the method comprising creating a boundary condition for vortex orientation pattern of a liquid crystal polymer on a substrate using materials with reversible photoalignment, equalizing exposure energy over the area of the waveplate by redistributing the energy of radiation used for photoalignment from the center of the beam to its peripheries, and using vector vortex waveplate as a linear-to-axial polarization converter. Fabrication of spectrally broadband vector vortex waveplates further comprises two or more liquid crystal polymer layers with opposite sign of twist.
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Patent Agency Ranking
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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公开(公告)号：US11294240B2
公开(公告)日：2022-04-05
申请号：US16928526
申请日：2020-07-14
Inventor： Nelson V. Tabirian , Justin L. Sigley , Zhi J. Liao , David E. Roberts
IPC: G02F1/1337 , G02F1/13 , G02F1/35 , G02F1/13363 , G02F1/00 , G02F1/1333 , G02F1/1335
Abstract: Diffractive optical structures, lenses, waveplates, devices, systems and methods, which have the same effect on light regardless of temperature within an operating temperature range. Temperature-compensated switchable diffractive waveplate systems, in which the diffraction efficiency can be maximized for the operating wavelength and temperature by means of adjustment of the electric potential across the liquid crystal or other anisotropic material in the diffracting state of the diffractive state, based on prior measurements of diffraction efficiency as a function of wavelength and temperature. The switchable diffractive waveplates can be a switchable diffractive waveplate diffuser, a switchable cycloidal diffractive waveplate, and a switchable diffractive waveplate lens. An electronic controller can apply an electric potential to the switchable diffractive waveplate. Amplitudes of the electric potential can be determined from lookup tables such that diffraction efficiency at an operating wavelength and measured temperature is maximized. A communications channel can transfer the measured temperature from temperature measurement means to the electronic controller.
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公开(公告)号：US11119257B2
公开(公告)日：2021-09-14
申请号：US16213467
申请日：2018-12-07
Applicant: Beam Engineering for Advanced Measurements Co. , U.S. Government as Represented by the Secretary of the Army
Inventor： Nelson V. Tabirian , Svetlana Serak , David E. Roberts , Diane Steeves , Brian Kimball
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：US10802302B2
公开(公告)日：2020-10-13
申请号：US16169717
申请日：2018-10-24
Applicant: Beam Engineering for Advanced Measurements Co. , U.S. Government as Represented by the Secretary of the Army
Inventor： Nelson Tabirian , Svetlana Serak , Diane Steeves , Brian Kimball
IPC: G02F1/1333 , G02F1/01 , G02F1/1337 , G02F1/1343
Abstract: The invention provides for lenses fabricated as planar thin film coatings with continuous structure. The lensing action is due to optical axis orientation modulation in the plane of the lens. The lenses of the current invention are fabricated using photoalignment of a liquid crystal polymer wherein the polarization pattern of radiation used for photoalignment is obtained by propagating the light through an optical system comprising a shape-variant nonlinear spatial light polarization modulators.
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