FR2381325A1 - Laser beam power distribution modification - involves array of little mirrors reflecting excess light from centre of beam - Google Patents

Laser beam power distribution modification - involves array of little mirrors reflecting excess light from centre of beam

Info

Publication number
FR2381325A1
FR2381325A1 FR7704680A FR7704680A FR2381325A1 FR 2381325 A1 FR2381325 A1 FR 2381325A1 FR 7704680 A FR7704680 A FR 7704680A FR 7704680 A FR7704680 A FR 7704680A FR 2381325 A1 FR2381325 A1 FR 2381325A1
Authority
FR
France
Prior art keywords
centre
light
power distribution
excess light
laser beam
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.)
Pending
Application number
FR7704680A
Other languages
French (fr)
Inventor
Yves Belvaux
Serge Lowenthal
Pierre Chavel
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.)
Bpifrance Financement SA
Original Assignee
Agence National de Valorisation de la Recherche ANVAR
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 Agence National de Valorisation de la Recherche ANVAR filed Critical Agence National de Valorisation de la Recherche ANVAR
Priority to FR7704680A priority Critical patent/FR2381325A1/en
Publication of FR2381325A1 publication Critical patent/FR2381325A1/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/58—Optics for apodization or superresolution; Optical synthetic aperture systems

Landscapes

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

Abstract

A grating or mash (3) is used to effect a redistribution of the relative intensity in a beam of light produced by a power laser (1). The light beam leaving the laser may have a Gaussian distribution and excess light is removed from the centre of the beam to give a flat distribution. The mash (3) consists of an array of mirrors on a transparent glass sheet. Light passes through the transparent areas to the next stage of the appts. (2) and excess light is reflected, (8). The proportion of mirror to transparent areas is higher at the centre than at the edges.
FR7704680A 1977-02-18 1977-02-18 Laser beam power distribution modification - involves array of little mirrors reflecting excess light from centre of beam Pending FR2381325A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7704680A FR2381325A1 (en) 1977-02-18 1977-02-18 Laser beam power distribution modification - involves array of little mirrors reflecting excess light from centre of beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7704680A FR2381325A1 (en) 1977-02-18 1977-02-18 Laser beam power distribution modification - involves array of little mirrors reflecting excess light from centre of beam

Publications (1)

Publication Number Publication Date
FR2381325A1 true FR2381325A1 (en) 1978-09-15

Family

ID=9186924

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7704680A Pending FR2381325A1 (en) 1977-02-18 1977-02-18 Laser beam power distribution modification - involves array of little mirrors reflecting excess light from centre of beam

Country Status (1)

Country Link
FR (1) FR2381325A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2500973A1 (en) * 1981-03-02 1982-09-03 Univ Arizona Foundation DEVICE AND METHOD FOR REDUCING THE EFFECTS OF BACKGROUND RADIATION
EP0348863A2 (en) * 1988-06-27 1990-01-03 Eastman Kodak Company Laser beam stop
US5155623A (en) * 1988-09-23 1992-10-13 At&T Bell Laboratories Arrangement for imaging multiple arrays of light beams

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2500973A1 (en) * 1981-03-02 1982-09-03 Univ Arizona Foundation DEVICE AND METHOD FOR REDUCING THE EFFECTS OF BACKGROUND RADIATION
EP0348863A2 (en) * 1988-06-27 1990-01-03 Eastman Kodak Company Laser beam stop
EP0348863A3 (en) * 1988-06-27 1991-01-09 Eastman Kodak Company Laser beam stop
US5155623A (en) * 1988-09-23 1992-10-13 At&T Bell Laboratories Arrangement for imaging multiple arrays of light beams

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