公开(公告)号：US20200150324A1

公开(公告)日：2020-05-14

申请号：US16746366

申请日：2020-01-17

Applicant: Beam Engineering for Advanced Measurements Co.

Inventor： Nelson Tabirian ,  David E. Roberts ,  Sarik Nersisyan ,  Olena Uskova ,  Anna Tabirian

IPC: 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

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.

公开(公告)号：US10107945B2

公开(公告)日：2018-10-23

申请号：US14193027

申请日：2014-02-28

Applicant: BEAM Engineering for Advanced Measurements Co.

Inventor： Nelson Tabirian ,  Sarik Nersisyan

IPC: G02B5/30 ,  B05D5/06 ,  B05D3/06

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.

公开(公告)号：US11366254B2

公开(公告)日：2022-06-21

申请号：US16746366

申请日：2020-01-17

Applicant: Beam Engineering for Advanced Measurements Co.

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.

公开(公告)号：US20180003874A9

公开(公告)日：2018-01-04

申请号：US14193027

申请日：2014-02-28

Applicant: BEAM ENGINEERING FOR ADVANCED MEASUREMENTS CO.

Inventor： Nelson Tabirian ,  Sarik Nersisyan

IPC: G02B5/30 ,  B05D5/06 ,  B05D3/06

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.