公开(公告)号：US20160178356A1

公开(公告)日：2016-06-23

申请号：US14974011

申请日：2015-12-18

Applicant: INSTITUT NATIONAL D'OPTIQUE

Inventor： Daniel LEFEBVRE ,  Éric SAMSON ,  Michel DOUCET ,  Sébastien ROY

IPC: G01B11/24

CPC classification number: G01B11/24 ,  G01B11/12

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.

Abstract translation: 描述了用于感测物体表面的光学系统。 该系统包括：用于发射以系统的光轴为中心的至少一个光束的光源; 用于反射所述至少一个入射光束以产生以光轴为中心并具有不同开度的至少两个中空圆锥形光束的光反射器，所述至少两个反射的中空锥形光束用于照亮所述表面; 以及用于对照明表面进行成像的图像捕获装置。

公开(公告)号：US20210055624A1

公开(公告)日：2021-02-25

申请号：US16998052

申请日：2020-08-20

Applicant: INSTITUT NATIONAL D'OPTIQUE

Inventor： Michel JACOB ,  Michel DOUCET ,  André FOUGERES

IPC: G02F1/29 ,  H01L33/00

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.

公开(公告)号：US20230328340A1

公开(公告)日：2023-10-12

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

IPC: H04N23/13 ,  G02B27/56 ,  G02B3/02 ,  G02B1/11 ,  G02B7/00 ,  G01N21/3581

CPC classification number: H04N23/13 ,  G02B27/56 ,  G02B3/02 ,  G02B1/11 ,  G02B7/003 ,  G01N21/3581 ,  G02B2003/0093

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.

公开(公告)号：US20220390590A1

公开(公告)日：2022-12-08

申请号：US17776023

申请日：2020-11-12

Applicant: INSTITUT NATIONAL D'OPTIQUE

Inventor： Linda MARCHESE ,  Alain BERGERON ,  Marc TERROUX ,  Michel DOUCET ,  François BERTHIAUME ,  Martin BRIAND ,  Mélanie LECLERC ,  Fabien CLAVEAU

IPC: G01S13/88 ,  G01S13/89 ,  G01S7/03

Abstract: There is described a terahertz (THz) imaging device and method for imaging an object hidden underneath clothing. The THz imaging device is generally configured for illuminating a region of clothing with a THz illumination beam, collecting a return optical beam reflected from the region of clothing in response to the illumination, generating a THz image based on the collected return optical beam, and tracking a position and orientation of the THz imaging device as the THz image is generated. A plurality of complementary THz images are generated by repeating the steps of illuminating, collecting, generating and tracking for a plurality of points of view of the THz imaging device relative to the clothing. By registering these THz images to one another in a common coordinate system based on the tracked position and orientation, the THz imaging device can output a composite THz image representing the hidden object, if any.

公开(公告)号：US20140168368A1

公开(公告)日：2014-06-19

申请号：US13718585

申请日：2012-12-18

Applicant: INSTITUT NATIONAL D'OPTIQUE

Inventor： Michel DOUCET ,  Michel Robert ,  Daniel Lefebvre

IPC: G01B11/24 ,  H04N13/02

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。

公开(公告)号：US20170184865A1

公开(公告)日：2017-06-29

申请号：US15390081

申请日：2016-12-23

Applicant: INSTITUT NATIONAL D'OPTIQUE

Inventor： Michel DOUCET ,  Alain BERGERON ,  Linda MARCHESE

IPC: G02B27/09 ,  G02B26/08 ,  G02B27/00 ,  G02B5/09

CPC classification number: G02B27/0927 ,  G02B5/0221 ,  G02B5/09 ,  G02B26/0816 ,  G02B27/0012 ,  G02B27/0983 ,  G02B27/48

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.