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WO2012045177A1 - Réflecteur parabolique - Google Patents

Réflecteur parabolique Download PDF

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Publication number
WO2012045177A1
WO2012045177A1 PCT/CA2011/050630 CA2011050630W WO2012045177A1 WO 2012045177 A1 WO2012045177 A1 WO 2012045177A1 CA 2011050630 W CA2011050630 W CA 2011050630W WO 2012045177 A1 WO2012045177 A1 WO 2012045177A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
optical medium
paraboloid
principal direction
focal point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CA2011/050630
Other languages
English (en)
Inventor
Sébastien BLAIS-OUELLETTE
Daniel Gagnon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Photon etc Inc
Original Assignee
Photon etc Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Photon etc Inc filed Critical Photon etc Inc
Publication of WO2012045177A1 publication Critical patent/WO2012045177A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/021—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using plane or convex mirrors, parallel phase plates, or particular reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0856—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors
    • G02B17/086—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors wherein the system is made of a single block of optical material, e.g. solid catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0019—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having reflective surfaces only (e.g. louvre systems, systems with multiple planar reflectors)
    • G02B19/0023—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having reflective surfaces only (e.g. louvre systems, systems with multiple planar reflectors) at least one surface having optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends

Definitions

  • a light collector such as an optical fiber, may be located at the focal point of the paraboloid to collect the reflected light. If the light passes a boundary of the optical medium into a medium with a different refractive index, the focal point of the paraboloid may be located at this boundary to avoid any chromatic dispersion due to refraction.
  • Figure 1 is a schematic view of a machined substrate from which is formed an off-axis parabolic reflector according to the present invention.
  • Figure 2 is a schematic view of the substrate material of Figure 1 after being cut along a longitudinal axis.
  • the present invention is directed to an optical reflector that changes the angle of divergence of the light it reflects, such as by focusing a collimated beam of light or by collimating a divergent beam.
  • the reflector also includes an optical medium adjacent to its reflective surface that has a relatively high index of refraction. This higher refractive index results in light from a light source having a lower divergence angle than with a medium of lower refractive index, such as air.
  • the glass rod is subsequently cut to produce the desired reflector form.
  • the particular shape of the reflector structure may be chosen to best suit the intended application.
  • a full parabolic reflector may be made by cutting the paraboloid shape along a plane perpendicular to the longitudinal axis, such as at the boundary between the cylindrical portion and the paraboloid portion. Regardless of the shape, it is important to take into account the location of the focal point of the
  • paraboloid This is particularly true if the application requires access to that point, such as in the case of a reflector that focuses a collimated beam into an optical fiber, in which case the end of the fiber would be located at the focal point. In such a case, the material would have to be cut so that the fiber could be positioned appropriately.
  • the example of Figure 5 makes use of a coupler 24 to hold the fiber in position, and index matching material, such as a fluid or adhesive, may be used between the fiber and the reflector surface to prevent any air gap between the two media.
  • index matching material such as a fluid or adhesive
  • the coupler 24 may also be made adjustable so that its position along the surface of the reflector 16 may be changed to accommodate slight variations in the trajectory of the light.
  • the fiber of the present embodiment has a relatively large numerical aperture, and light exiting the fiber has a fast divergence.
  • the reflector medium in this case glass
  • the degree of divergence of the beam will be less than if the light from the fiber exited into a medium with a lower index of refraction (e.g., air), as is the case with conventional reflectors.
  • a medium with a lower index of refraction e.g., air
  • the divergent beam from fiber 20 is collimated by the reflected surface, and exits the reflector body as a collimated beam, as shown at 22.
  • the collimated beam exits the reflector medium in a direction perpendicular to the reflector surface, there will be no refraction or
  • the reflector is formed using single-point diamond turning (SPDT).
  • SPDT is a machining process that uses single crystal cutting tools and specialized machinery to produce a precision surface on selected materials by accurately cutting away a thin portion of the surface.
  • An example of this fabrication process uses the following steps:

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

L'invention porte sur un réflecteur parabolique, lequel réflecteur est formé à partir d'un milieu solide à travers lequel passe une lumière devant être réfléchie. Le milieu a un indice de réfraction relativement élevé afin de rendre minimale la divergence de la lumière. La lumière passant à travers le milieu solide selon une première direction principale rencontre la surface du réflecteur et est focalisée ou collimatée, en fonction de l'angle de divergence de la lumière originale. La lumière réfléchie sort alors du milieu solide selon une seconde direction principale. Du fait que la surface de réflecteur concave est intérieure à un milieu solide, elle peut être formée en présentant un rayon de courbure beaucoup plus petit que celui d'un réflecteur classique. Par l'usinage de l'extérieur du milieu solide et l'application d'un revêtement réfléchissant à la surface incurvée, un réflecteur parabolique désaxé rapide peut être créé en utilisant uniquement des outils d'usinage standard.
PCT/CA2011/050630 2010-10-07 2011-10-06 Réflecteur parabolique Ceased WO2012045177A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US39071810P 2010-10-07 2010-10-07
US61/390,718 2010-10-07

Publications (1)

Publication Number Publication Date
WO2012045177A1 true WO2012045177A1 (fr) 2012-04-12

Family

ID=45927178

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2011/050630 Ceased WO2012045177A1 (fr) 2010-10-07 2011-10-06 Réflecteur parabolique

Country Status (1)

Country Link
WO (1) WO2012045177A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105606571A (zh) * 2016-01-11 2016-05-25 北京理工大学 一种非球面反射式激光诱导光谱激发/收集系统
CN106094173A (zh) * 2016-08-26 2016-11-09 马人欢 反射型特效摄像镜头
WO2017093242A1 (fr) * 2015-12-01 2017-06-08 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. Procédé et dispositif de fabrication d'un élément optique comprenant au moins trois surfaces fonctionnelles optiques agencées de façon monolithique et élément optique
US10098540B2 (en) 2011-12-09 2018-10-16 Regents Of The University Of Minnesota Hyperspectral imaging for detection of Parkinson's disease
US10837830B2 (en) 2016-03-10 2020-11-17 Regents Of The University Of Minnesota Spectral-spatial imaging device
CN118483202A (zh) * 2024-05-17 2024-08-13 中国人民解放军火箭军特色医学中心 一种libs荧光光谱收集与探测装置及方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6975465B1 (en) * 2002-04-03 2005-12-13 University Of Central Florida Research Foundation, Inc. Method and apparatus for use of beam control prisms with diode laser arrays

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6975465B1 (en) * 2002-04-03 2005-12-13 University Of Central Florida Research Foundation, Inc. Method and apparatus for use of beam control prisms with diode laser arrays

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11819276B2 (en) 2011-12-09 2023-11-21 Regents Of The University Of Minnesota Hyperspectral imaging for early detection of Alzheimer's disease
US10098540B2 (en) 2011-12-09 2018-10-16 Regents Of The University Of Minnesota Hyperspectral imaging for detection of Parkinson's disease
US11503999B2 (en) 2011-12-09 2022-11-22 Regents Of The University Of Minnesota Hyperspectral imaging for detection of Alzheimer's disease
US11642023B2 (en) 2011-12-09 2023-05-09 Regents Of The University Of Minnesota Hyperspectral imaging for detection of transmissible spongiform encephalopathy
US12329457B2 (en) 2011-12-09 2025-06-17 Regents Of The University Of Minnesota Hyperspectral imaging for early detection of Alzheimer's disease
WO2017093242A1 (fr) * 2015-12-01 2017-06-08 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. Procédé et dispositif de fabrication d'un élément optique comprenant au moins trois surfaces fonctionnelles optiques agencées de façon monolithique et élément optique
US11187881B2 (en) 2015-12-01 2021-11-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method and device for producing an optical component having at least three monolithically arranged optical functional surfaces and optical component
CN105606571A (zh) * 2016-01-11 2016-05-25 北京理工大学 一种非球面反射式激光诱导光谱激发/收集系统
US10837830B2 (en) 2016-03-10 2020-11-17 Regents Of The University Of Minnesota Spectral-spatial imaging device
US11187580B2 (en) 2016-03-10 2021-11-30 Regents Of The University Of Minnesota Spectral-spatial imaging device
US12055436B2 (en) 2016-03-10 2024-08-06 Regents Of The University Of Minnesota Spectral-spatial imaging device
CN106094173A (zh) * 2016-08-26 2016-11-09 马人欢 反射型特效摄像镜头
CN118483202A (zh) * 2024-05-17 2024-08-13 中国人民解放军火箭军特色医学中心 一种libs荧光光谱收集与探测装置及方法

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