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公开(公告)号：US11366253B2
公开(公告)日：2022-06-21
申请号：US16746254
申请日：2020-01-17
Applicant: Beam Engineering for Advanced Measurements Co. , U.S. Government as Represented by the Secretary of the Army
Inventor： Nelson V. Tabirian , Svetlana Serak , Olena Uskova , David E. Roberts , Anna Tabirian , Diane Steeves , Brian Kimball
IPC: G02B6/12 , G02B6/32 , G02B6/30 , G02B6/028 , G02B6/10 , G02B5/18 , G02C7/02 , G02C7/06 , G02C7/12 , A61F2/16 , G02B3/10 , G02C7/08 , G02B5/30 , G02B27/42 , G02B5/00 , G02B6/024 , G02B6/35 , G02B3/00 , G02C7/10
Abstract: Methods, systems and devices for diffractive waveplate lens and mirror systems allowing electronically pointing and focusing light at different focal planes. The system can be incorporated into a variety of optical schemes for providing electrical control of transmission. In another embodiment, the system comprises diffractive waveplates of different functionality to provide a system for controlling not only focusing but other propagation properties of light including direction, phase profile, and intensity distribution. The diffractive waveplate lens and mirror systems are applicable to optical communication systems.
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公开(公告)号：US20200025987A1
公开(公告)日：2020-01-23
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：US20190113777A1
公开(公告)日：2019-04-18
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: G02F1/01 , G02F1/1337 , G02F1/1343 , G02F1/1333
CPC classification number: G02F1/0136 , G02F1/133365 , G02F1/133788 , G02F1/134309
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：US10075625B2
公开(公告)日：2018-09-11
申请号：US14324126
申请日：2014-07-04
Inventor： Nelson Tabirian , James Hunt
CPC classification number: H04N5/2256 , H04N7/183 , H04N17/002
Abstract: Method for jamming or affecting the quality of photo and video recording, the method comprising illuminating the area, collecting light reflected or scattered from optical components such as camera lenses, amplifying them, and reversing the amplified beams back to the camera with phase conjugating mirror. The method may further comprise image acquisition and processing for identifying unwanted optical components and sensors, and electronically pointing and focusing a laser beam on said components and sensors.
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15.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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Patent Agency Ranking
16.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：US20180136535A1
公开(公告)日：2018-05-17
申请号：US15350856
申请日：2016-11-14
Inventor： David E. Roberts , Nelson V. Tabirian
Abstract: Optical beam shaping systems and methods can include an illumination source and a diffractive waveplate diffuser. The diffractive waveplate diffuser includes a layer of patterned optically anisotropic material. In one embodiment, the layer of patterned optically anisotropic material is fabricated in the form of patterned, optically anisotropic liquid crystal polymer. In another embodiment, the layer of patterned optically anisotropic material is a layer of liquid crystal, the diffractive waveplate diffuser also includes two alignment layers and two transparent conductive coatings, and the properties of the liquid crystal layer are controlled by the application of an electric potential between the two transparent conductive coatings. A method is provided for designing the alignment pattern of the layer of optically anisotropic material.
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公开(公告)号：US12111557B1
公开(公告)日：2024-10-08
申请号：US18217853
申请日：2023-07-03
Applicant: Beam Engineering for Advanced Measurements Co. , Defense Advanced Research Projects Agency
Inventor： Robert Winsor , Paul Calhoun , David Roberts , Nelson Tabirian
CPC classification number: G02F1/292 , H01S3/0071
Abstract: Opto-mechanical assemblies, systems, devices and methods for pointing laser and other optical beams, and for directing the field of view of sensors are disclosed. The assemblies consist of thin rotating optical elements of a type that diffracts the optical beam over a wide field of regard in two dimensions, and the angle of incidence of the optical beam or line of sight impinging on the optical elements are dynamically controlled maximizing the diffraction efficiency of the optical elements.
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公开(公告)号：US11366254B2
公开(公告)日：2022-06-21
申请号：US16746366
申请日：2020-01-17
Inventor： Nelson Tabirian , David E. Roberts , Sarik Nersisyan , Olena Uskova , Anna Tabirian
IPC: G02B6/00 , G02B6/12 , G02B6/32 , G02B6/028 , G02B6/10 , G02B5/18 , G02B27/42 , G02B3/00 , G02B6/35 , G02B6/024 , G02B5/00 , G02B5/30 , A61F2/16 , G02C7/08 , G02B3/10 , G02C7/12 , G02C7/06 , G02C7/02 , G02C7/10
Abstract: Optical beam steering and focusing systems, devices, and methods that utilize diffractive waveplates are improved to produce high efficiency at large beam deflection angles, particularly around normal incidence, by diffractive waveplate architectures comprising a special combination of liquid crystal polymer diffractive waveplate both layers with internal twisted structure and at a layer with uniform structure.
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公开(公告)号：US20200025986A1
公开(公告)日：2020-01-23
申请号：US16220995
申请日：2018-12-14
Applicant: Beam Engineering for Advanced Measurements Co. , U.S. Government as Represented by the Secretary of the Army
Inventor： Nelson V. Tabirian , Svetlana Serak , Olena Uskova , David E. Roberts , Anna Tabirian , Diane Steeves , Brian Kimball
IPC: G02B5/18 , G02C7/02 , G02C7/06 , G02C7/12 , A61F2/16 , G02B3/10 , G02C7/08 , G02B5/30 , G02B27/42 , G02B5/00 , G02B6/024 , G02B6/35 , G02B3/00
Abstract: Methods, systems and devices for diffractive waveplate lens and mirror systems allowing electronically focusing light at different focal planes. The system can be incorporated into a variety of optical schemes for providing electrical control of transmission. In another embodiment, the system comprises diffractive waveplates of different functionality to provide a system for controlling not only focusing but other propagation properties of light including direction, phase profile, and intensity distribution.
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