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WO1997035685A1 - Procede de nettoyage de fenetre a lumiere laser - Google Patents

Procede de nettoyage de fenetre a lumiere laser Download PDF

Info

Publication number
WO1997035685A1
WO1997035685A1 PCT/US1997/005007 US9705007W WO9735685A1 WO 1997035685 A1 WO1997035685 A1 WO 1997035685A1 US 9705007 W US9705007 W US 9705007W WO 9735685 A1 WO9735685 A1 WO 9735685A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser light
window
laser
light window
peak power
Prior art date
Application number
PCT/US1997/005007
Other languages
English (en)
Inventor
James W. Early
Original Assignee
The Regents Of The University Of California
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 The Regents Of The University Of California filed Critical The Regents Of The University Of California
Priority to AU25922/97A priority Critical patent/AU2592297A/en
Publication of WO1997035685A1 publication Critical patent/WO1997035685A1/fr

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
    • B23K26/16—Removal of by-products, e.g. particles or vapours produced during treatment of a workpiece

Definitions

  • This invention relates to laser window cleaning.
  • laser light window with a series of short duration, high peak power laser light pulses.
  • this laser light window cleaning method further comprises a first step in which the laser light window is heated to at least approximately 350°C.
  • Figure 1 is a schematic representation of an embodiment of the apparatus used for laser light window cleaning.
  • Figure 2 is a photograph of (left to right): a window coated with carbonized
  • varnish with cleaned area an uncarbonized varnish coated window, a sooted laser light window with a cleaned area.
  • Figure 3 is a graph of the percent transmission of laser light through a window
  • Jet fuels contain low volatility paraffinic components, typically as much as five percent. These low volatility components, which are in solution in the other jet
  • sooty residue on the laser window glass can be removed by application of pulses of short duration high
  • peak power laser light such as that produced by a short-pulse Q-switched laser.
  • Short pulse lasers are defined in the art as being lasers designed to generate a
  • laser light pulses of this application generally have the maximum instantaneous power
  • the coating can
  • combustion can be removed by heating of the window followed by laser light
  • Heating of the window can be accomplished by utilization of heat from the
  • hydrocarbon residues are removed with pulses of short duration high peak power laser
  • sooty hydrocarbons readily absorb the laser light and vaporize from the
  • This invention can be practiced using any source of laser light positioned so as
  • Quartz substrates 1 in diameter x 1 mm thickness
  • a contaminated window 14 was placed into the focused laser output 12 of the
  • the 10-cm focal length lens which was an integral part of a laser-based fuel ignitor.
  • the Nd:YAG laser provided a multiple-transverse
  • the transmission of laser light 12 through the window 14 was monitored by a
  • the laser pulse energy monitor 20 with each firing of the laser ignitor system.
  • the laser pulse energy monitor 20 transmitted signals to an electronic readout device 22.
  • window transmission is plotted versus number of incident laser pulses for placement
  • coated window provided the same transmission.
  • the small transmission difference between an uncontaminated window and the laser cleaned window was found to be due to vignetting of laser light
  • Fuel varnish was prepared by
  • Nd YAG laser light window cleaning performance virtually identical to that
  • inventive apparatuses, articles of manufacture, methods and compositions are not to

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

L'invention concerne un procédé de nettoyage de fenêtre à lumière laser, selon lequel on irradie une fenêtre (16) à lumière laser avec des impulsions (12) de lumière laser à pics de puissance élevés, appliquées en séries de courte durée. Ledit procédé de nettoyage peut également comprendre une opération consistant à chauffer la fenêtre au moins à 350 °C avant de l'irradier.
PCT/US1997/005007 1996-03-28 1997-03-27 Procede de nettoyage de fenetre a lumiere laser WO1997035685A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU25922/97A AU2592297A (en) 1996-03-28 1997-03-27 Laser light window cleaning

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US1434896P 1996-03-28 1996-03-28
US60/014,348 1996-03-28
US64238396A 1996-05-03 1996-05-03
US08/642,383 1996-05-03

Publications (1)

Publication Number Publication Date
WO1997035685A1 true WO1997035685A1 (fr) 1997-10-02

Family

ID=26685994

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/005007 WO1997035685A1 (fr) 1996-03-28 1997-03-27 Procede de nettoyage de fenetre a lumiere laser

Country Status (2)

Country Link
AU (1) AU2592297A (fr)
WO (1) WO1997035685A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003061861A1 (fr) 2002-01-24 2003-07-31 Proanalysis As Systeme et procede pour le nettoyage au laser
WO2004080641A1 (fr) * 2003-03-12 2004-09-23 Siemens Aktiengesellschaft Dispositif d'usinage au laser de substrats, notamment de substrats de circuits electriques

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6187338A (ja) * 1984-10-05 1986-05-02 Nec Corp 多重ビ−ム照射Ｓｉ表面ドライ洗浄法
JPS63154940A (ja) * 1986-12-19 1988-06-28 Hitachi Ltd プラズマ利用装置内部観測窓の清浄方法
JPH0681151A (ja) * 1992-09-01 1994-03-22 Mitsubishi Materials Corp 容器の窓の清浄方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6187338A (ja) * 1984-10-05 1986-05-02 Nec Corp 多重ビ−ム照射Ｓｉ表面ドライ洗浄法
JPS63154940A (ja) * 1986-12-19 1988-06-28 Hitachi Ltd プラズマ利用装置内部観測窓の清浄方法
JPH0681151A (ja) * 1992-09-01 1994-03-22 Mitsubishi Materials Corp 容器の窓の清浄方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
OPTICS AND LASERS IN ENGINEERING, Vol. 15, 1991, UEDA et al., "Laser Cleaning of Glass", pages 275-278. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003061861A1 (fr) 2002-01-24 2003-07-31 Proanalysis As Systeme et procede pour le nettoyage au laser
WO2004080641A1 (fr) * 2003-03-12 2004-09-23 Siemens Aktiengesellschaft Dispositif d'usinage au laser de substrats, notamment de substrats de circuits electriques

Also Published As

Publication number Publication date
AU2592297A (en) 1997-10-17

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