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公开(公告)号：US11852951B2
公开(公告)日：2023-12-26
申请号：US16998052
申请日：2020-08-20
Applicant: INSTITUT NATIONAL D'OPTIQUE
Inventor： Michel Jacob , Michel Doucet , André Fougeres
IPC: G01N21/3581 , G02F1/29 , H01L33/00 , G01S13/88 , G01S13/89
CPC classification number: G02F1/292 , G01N21/3581 , G01S13/887 , G01S13/89 , H01L33/002 , G02F2203/13 , G02F2203/24
Abstract: There is described a terahertz illumination source for terahertz imaging. The terahertz illumination source generally has: a surface; a plurality of terahertz radiation emitting elements mounted to said surface; a plurality of individual beam shaping elements each being optically coupled to a respective one of said terahertz radiation emitting elements; a collective beam shaper optically coupled to at least some of said individual beam shaping elements; and a control signal generator communicatively coupled to said terahertz radiation emitting elements, said control signal generator supplying a plurality of control signals to said terahertz radiation emitting elements, said terahertz radiation emitting elements emitting a plurality of individual terahertz radiation beams being collected and redirected successively by said individual beam shaping elements and said collective beam shaper, said terahertz radiation emitting elements and/or said control signals being configured so that said individual terahertz radiation beams are incoherent with respect to one another.
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公开(公告)号：US20190171025A1
公开(公告)日：2019-06-06
申请号：US15833726
申请日：2017-12-06
Applicant: Institut National D'Optique
Inventor： Michel Doucet
IPC: G02B27/09
Abstract: An optical component for transforming an input light beam having a Gaussian irradiance distribution into an output light sheet is provided. The optical component includes a first reflective surface extending around the central optical axis of the optical component and across an input light path of the input light beam, and reflects input light rays into transitional light rays defining a transitional light cone. A second reflective surface extends around the central optical axis and across a light path of the transitional light cone, reflecting the transitional light rays outwardly into output light rays defining the output light sheet. The first and second reflective surfaces are configured to distribute optical power within the output light sheet according to a Gaussian irradiance distribution transversally to the output light sheet. The output light sheet may be planar or conical.
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Patent Agency Ranking
公开(公告)号：US10042172B2
公开(公告)日：2018-08-07
申请号：US15390081
申请日：2016-12-23
Applicant: INSTITUT NATIONAL D'OPTIQUE
Inventor： Michel Doucet , Alain Bergeron , Linda Marchese
Abstract: A beam conditioning device includes a coherence-breaking module and a beam transforming module. The coherence-breaking module is configured to break a spatial coherence between beam components of the light beam and may include coherence-breaking mirrors having a structured pattern on their reflective surfaces. The beam transforming module may include a primary optical element and a secondary optical element and is configured to transform the spatial energy distribution and the footprint of the light beam. The beam conditioning device may be used to transform a Gaussian light beam into a flat-top light beam suitable for terahertz imaging applications, although other initial and/or final energy distributions may be considered.
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4.发明授权公开(公告)号：US09131219B2
公开(公告)日：2015-09-08
申请号：US13718585
申请日：2012-12-18
Applicant: INSTITUT NATIONAL D'OPTIQUE
Inventor： Michel Doucet , Michel Robert , Daniel Lefebvre
CPC classification number: H04N13/20 , G01B11/2518
Abstract: A method for determining a centerline for a triangulation-based optical profilometry system, compensating for the spatial variations of the reflectance of an object's surface. The method comprises providing a luminous line on the object, the luminous line being a triangulation line superposed with a compensation line; capturing an image of the triangulation line and of the compensation line; for each position along the imaged triangulation line, determining a transverse triangulation profile from the imaged triangulation line and a transverse compensation profile from the imaged compensation line; determining a transverse correction profile given by the reciprocal of the transverse compensation profile; multiplying the transverse triangulation profile with the transverse correction profile to obtain a corrected transverse triangulation profile; computing a center of the corrected transverse triangulation profile. The centers determined at positions along the triangulation line form the centerline. Embodiments of a triangulation-based optical profilometry system integrating the method are disclosed.
Abstract translation: 用于确定基于三角测量的光学轮廓测量系统的中心线的方法，补偿对象表面的反射率的空间变化。 该方法包括在物体上设置发光线，发光线为与补偿线重叠的三角线; 捕获三角测量线和补偿线的图像; 对于沿着成像的三角测量线的每个位置，从成像的三角测量线和来自成像的补偿线的横向补偿曲线确定横向三角剖分轮廓; 确定由横向补偿曲线的倒数给出的横向校正曲线; 将横向三角剖面图与横向校正曲线相乘以获得校正的横向三角剖面; 计算校正横向三角剖面的中心。 沿三角测量线位置确定的中心线形成中心线。 公开了集成该方法的基于三角测量的光学轮廓测量系统的实施例。
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公开(公告)号：US12256133B2
公开(公告)日：2025-03-18
申请号：US18040699
申请日：2021-09-08
Applicant: INSTITUT NATIONAL D'OPTIQUE
Inventor： Michel Doucet , Alain Bergeron , Francis Genereux , Hassane Oulachgar , Marc Terroux
Abstract: An imaging system that includes an image sensor and imaging optics is provided. The image sensor has a sensing surface and it captures images of a scene. The imaging optics is optically coupled to the image sensor and is configured to form the images of the scene onto the sensing surface of the image sensor. The imaging optics includes a sensor-adjacent optical element having an exit surface located in close proximity to the sensing surface of the image sensor. The exit surface of the sensor-adjacent optical element and the sensing surface of the image sensor are spaced apart by a gap having a gap width enabling evanescent-wave coupling from the exit surface to the sensing surface for light having wavelengths within the sensor spectral range.
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公开(公告)号：US11126006B2
公开(公告)日：2021-09-21
申请号：US15833726
申请日：2017-12-06
Applicant: Institut National D'Optique
Inventor： Michel Doucet
IPC: G02B27/09
Abstract: An optical component for transforming an input light beam having a Gaussian irradiance distribution into an output light sheet is provided. The optical component includes a first reflective surface extending around the central optical axis of the optical component and across an input light path of the input light beam, and reflects input light rays into transitional light rays defining a transitional light cone. A second reflective surface extends around the central optical axis and across a light path of the transitional light cone, reflecting the transitional light rays outwardly into output light rays defining the output light sheet. The first and second reflective surfaces are configured to distribute optical power within the output light sheet according to a Gaussian irradiance distribution transversally to the output light sheet. The output light sheet may be planar or conical.
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公开(公告)号：US09696143B2
公开(公告)日：2017-07-04
申请号：US14974011
申请日：2015-12-18
Applicant: INSTITUT NATIONAL D'OPTIQUE
Inventor： Daniel Lefebvre , Éric Samson , Michel Doucet , Sébastien Roy
Abstract: There is described an optical system for sensing the surface of an object. The system comprises: a light source for emitting at least one light beam centered on the optical axis of the system; a light reflector for reflecting the at least one incident light beam to generate at least two hollow conical light beams centered on the optical axis and having different opening angles, the at least two reflected hollow conical light beams for illuminating the surface; and an image capture device for imaging the illuminated surface.
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