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公开(公告)号：US20210293526A1
公开(公告)日：2021-09-23
申请号：US16823918
申请日：2020-03-19
Inventor： Jacob D. Garan
Abstract: A shearography system uses a Geometric phase or Pancharatnam-Berry (PB) phase element to shear an image. A PB phase element provides a non-dynamical phase change used for wavefront control and results in uniform half-wave of retardation. Geometric phase may also be utilized to capture snapshot phase-resolved wavefront measurements and shearograms via a focal plane array with micro-patterned linear polarizers of different orientations. Wavefront shape control arises when the local orientation of the retarding media is spatially varied. One or more PB phase elements can be flipped or rotated to perform multiple tasks depending on its orientation. Two PB elements can be used in succession in order to provide a variable purely spatial shift between interfering wavefronts. The spatial offset of the light exiting the second element can be adjusted simply by changing the spacing between the two geometric phase surfaces. In shearography, this corresponds to an adjustable shear length.
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公开(公告)号：US20230003889A1
公开(公告)日：2023-01-05
申请号：US17366225
申请日：2021-07-02
Inventor： Michael J. DeWeert , Brian Chock , Jacob D. Garan , Reid A. Noguchi , Gary Sawai , Dugan C. Yoon
Abstract: An underwater imaging system is carried by a submersible platform to capture images that are processed into three-dimensional images stitched together to create a 3D dimensional video at video rate speeds that are transmitted to a control unit above the surface of the water. The imaging system utilizes a high speed image sensor or camera to capture sequential gated images that are synced via a gating module to two sequential laser beam pulses. The laser beam pulses illuminate an object in each gated image. When the object is within a gate overlap region, the two images may be processed using 3D imaging techniques to generate a 3D representation of the object in the overlap region of the two gates.
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公开(公告)号：US11719822B2
公开(公告)日：2023-08-08
申请号：US17366225
申请日：2021-07-02
Inventor： Michael J. DeWeert , Brian Chock , Jacob D. Garan , Reid A. Noguchi , Gary Sawai , Dugan C. Yoon
Abstract: An underwater imaging system is carried by a submersible platform to capture images that are processed into three-dimensional images stitched together to create a 3D dimensional video at video rate speeds that are transmitted to a control unit above the surface of the water. The imaging system utilizes a high speed image sensor or camera to capture sequential gated images that are synced via a gating module to two sequential laser beam pulses. The laser beam pulses illuminate an object in each gated image. When the object is within a gate overlap region, the two images may be processed using 3D imaging techniques to generate a 3D representation of the object in the overlap region of the two gates.
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公开(公告)号：US20210278579A1
公开(公告)日：2021-09-09
申请号：US16716921
申请日：2019-12-17
Inventor： Jacob D. Garan
Abstract: The present disclosure relates generally to a method of use for a field flattening interference filter. More particularly, the present disclosure relates a field flattening bandpass interference filter with the cut-on edge of the pass band at the system wavelength at a normal angle of incidence. Further discussed is a method to extend the field flattening design to work at multiple system wavelengths through the optimized design of a multi-band interference filter.
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公开(公告)号：US11650042B2
公开(公告)日：2023-05-16
申请号：US16414971
申请日：2019-05-17
Inventor： Christopher E. Saxer , Mark S. Branham , Jacob D. Garan
CPC classification number: G01B9/02098 , G01B9/02087 , G01B9/02095 , G01B11/162 , G01S7/4815 , G02B27/0955 , G02B27/106 , G02B27/123 , G02B27/48
Abstract: A laser transmission apparatus utilizing multiple laser beams and beam paths with a diverger lens to provide an illumination pattern that can compensate for lateral movement of the platform during shearography is provided. Further, this optical setup requires no moving parts and does not reduce power of the laser beams as they move through the individual components thereof. From the perspective of the surface being scanned or inspected, the present disclosure may provide two laser images of a single surface that appear to be identical despite the fact that they were taken from two different spatial positions of the moving platform.
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Patent Agency Ranking
公开(公告)号：US20230096503A1
公开(公告)日：2023-03-30
申请号：US17487758
申请日：2021-09-28
Inventor： Mark L. Oskotsky , Jacob D. Garan , Morgan Jolley , Daniel N. Kokubun , Michael J. Russo
IPC: G02B13/14 , G02B13/06 , H01L27/146
Abstract: An athermal and achromatic lens with a high resolution while further being near orthoscopic and providing a large field of view. Further, the provided VNIR lens may utilize only three types of optical glass allowing the lens to be reduced in size, cost, and weight while further reducing or minimizing the complexity thereof.
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公开(公告)号：US20220011089A1
公开(公告)日：2022-01-13
申请号：US16924876
申请日：2020-07-09
Inventor： Jacob D. Garan , Mark S. Branham , Christopher E. Saxer
IPC: G01B9/02
Abstract: A splitting and recombining optical component with an increased field of view while maintaining or only minimally increasing the space requirements therefor is provided. Further, the combination of the changes in physical geometry and refractive index of the beam splitting and recombining optical device can increase the field of view of a system while maintaining, or even reducing, the mass of the system in which the present beam splitting and recombining optic may be utilized
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公开(公告)号：US12078817B2
公开(公告)日：2024-09-03
申请号：US17565124
申请日：2021-12-29
Inventor： Jacob D. Garan , Michael J. DeWeert
CPC classification number: G02B27/48 , G01B11/162 , G02B27/283
Abstract: A laser transmission assembly for shearography and related systems utilizing transmissive geometric phase plate pairs in place of Risley prism pairs or movable mirrors therein. Transmissive geometric phase plates provide for a system that is more compact than systems utilizing mirrors or Risley prism pairs while maintaining or improving the adjustability of the system and further offering beamshaping to provide desired illumination patterns.
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公开(公告)号：US20230204970A1
公开(公告)日：2023-06-29
申请号：US17565124
申请日：2021-12-29
Inventor： Jacob D. Garan , Michael J. DeWeert
CPC classification number: G02B27/48 , G02B27/283 , G01B11/162
Abstract: A laser transmission assembly for shearography and related systems utilizing transmissive geometric phase plate pairs in place of Risley prism pairs or movable mirrors therein. Transmissive geometric phase plates provide for a system that is more compact than systems utilizing mirrors or Risley prism pairs while maintaining or improving the adjustability of the system and further offering beamshaping to provide desired illumination patterns.
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公开(公告)号：US20220011091A1
公开(公告)日：2022-01-13
申请号：US16925420
申请日：2020-07-10
Inventor： Andrew N. Acker , Jacob D. Garan
Abstract: A method and apparatus for performing shearography where the shear length and direction can be set in image processing, thus allowing all shear sizes to be computed and tested from a single data set, which can be collected in a single pass over a test surface or test object. The present process assures that a single data set can be processed with optimal shear length for multiple target types, thus reducing or eliminating the chance of missing a target detection while additionally enhancing target shape analysis by allowing the calculation of target response versus shear length and shear direction.
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