WO2004083794A3 - Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light - Google Patents

Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light Download PDF

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Publication number
WO2004083794A3
WO2004083794A3 PCT/US2004/008219 US2004008219W WO2004083794A3 WO 2004083794 A3 WO2004083794 A3 WO 2004083794A3 US 2004008219 W US2004008219 W US 2004008219W WO 2004083794 A3 WO2004083794 A3 WO 2004083794A3
Authority
WO
WIPO (PCT)
Prior art keywords
light
spectrometer
interaction region
receive
wavelengths
Prior art date
Application number
PCT/US2004/008219
Other languages
French (fr)
Other versions
WO2004083794A2 (en
Inventor
Paul E Denney
Jay R Eastman
Ta-Chieh Huang
Original Assignee
Univ Loma Linda Med
Paul E Denney
Jay R Eastman
Ta-Chieh Huang
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 Univ Loma Linda Med, Paul E Denney, Jay R Eastman, Ta-Chieh Huang filed Critical Univ Loma Linda Med
Priority to CA2519632A priority Critical patent/CA2519632C/en
Priority to AU2004221407A priority patent/AU2004221407B2/en
Priority to JP2006507295A priority patent/JP4454625B2/en
Priority to EP04757585A priority patent/EP1610921A2/en
Publication of WO2004083794A2 publication Critical patent/WO2004083794A2/en
Publication of WO2004083794A3 publication Critical patent/WO2004083794A3/en
Priority to KR1020057017638A priority patent/KR101081537B1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • B23K26/032—Observing, e.g. monitoring, the workpiece using optical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • B23K26/034—Observing the temperature of the workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
    • B23K26/042—Automatically aligning the laser beam
    • B23K26/043—Automatically aligning the laser beam along the beam path, i.e. alignment of laser beam axis relative to laser beam apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
    • B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
    • B23K26/127—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an enclosure
    • B23K26/128—Laser beam path enclosures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/16—Removal of by-products, e.g. particles or vapours produced during treatment of a workpiece
    • 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
    • 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
    • G01J3/0218—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using optical fibers
    • 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
    • G01J3/0291—Housings; Spectrometer accessories; Spatial arrangement of elements, e.g. folded path arrangements
    • 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
    • G01J3/28—Investigating the spectrum

Abstract

A detection system (600) is used during irradiation of an interaction region of a structure including embedded material with laser light. The detection system (600) includes a collimating lens (610) positioned to receive light emitted from the interaction region. The detection system (600) further includes an optical fiber (620) optically coupled to the collimating lens (610) and a spectrometer (630) optically coupled to the optical fiber (620). The spectrometer (630) is adapted for analysis of the light for indications of the embedded material within the interaction region. The spectrometer (630) includes an input slit (631) adapted to receive light from the optical fiber (620). The input slit (631) has a width selected to provide sufficient light transmittance and sufficient resolution. The spectrometer (630) further includes an optical grating (632) adapted to receive light from the input slit (631) and to separate the light into a spectrum of wavelengths. The spectrometer (630) further includes a collection lens (633) adapted to receive a selected range of wavelengths of the separated light from the optical grating (632). The spectrometer (630) further includes a light sensor (634) adapted to receive the selected range of wavelengths and to generate a signal corresponding to an intensity of the received light.
PCT/US2004/008219 2003-03-18 2004-03-18 Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light WO2004083794A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA2519632A CA2519632C (en) 2003-03-18 2004-03-18 Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light
AU2004221407A AU2004221407B2 (en) 2003-03-18 2004-03-18 Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light
JP2006507295A JP4454625B2 (en) 2003-03-18 2004-03-18 Method and apparatus for detecting reinforcing bars embedded in an interaction area of a building irradiated with laser light
EP04757585A EP1610921A2 (en) 2003-03-18 2004-03-18 Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light
KR1020057017638A KR101081537B1 (en) 2003-03-18 2005-09-20 Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US45604303P 2003-03-18 2003-03-18
US60/456,043 2003-03-18
US47105703P 2003-05-16 2003-05-16
US60/471,057 2003-05-16
US49646003P 2003-08-20 2003-08-20
US60/496,460 2003-08-20
US10/691,444 2003-10-22
US10/691,444 US7286223B2 (en) 2003-03-18 2003-10-22 Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light

Publications (2)

Publication Number Publication Date
WO2004083794A2 WO2004083794A2 (en) 2004-09-30
WO2004083794A3 true WO2004083794A3 (en) 2005-03-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/008219 WO2004083794A2 (en) 2003-03-18 2004-03-18 Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light

Country Status (7)

Country Link
US (7) US7286223B2 (en)
EP (1) EP1610921A2 (en)
JP (1) JP4454625B2 (en)
KR (1) KR101081537B1 (en)
AU (1) AU2004221407B2 (en)
CA (1) CA2519632C (en)
WO (1) WO2004083794A2 (en)

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US7379483B2 (en) * 2003-03-18 2008-05-27 Loma Linda University Medical Center Method and apparatus for material processing
US7286223B2 (en) * 2003-03-18 2007-10-23 Loma Linda University Medical Center Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light
US7060932B2 (en) * 2003-03-18 2006-06-13 Loma Linda University Medical Center Method and apparatus for material processing
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