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GB1533977A - Laser engraving of surfaces - Google Patents

Laser engraving of surfaces

Info

Publication number
GB1533977A
GB1533977A GB2839/75A GB283975A GB1533977A GB 1533977 A GB1533977 A GB 1533977A GB 2839/75 A GB2839/75 A GB 2839/75A GB 283975 A GB283975 A GB 283975A GB 1533977 A GB1533977 A GB 1533977A
Authority
GB
United Kingdom
Prior art keywords
polarization
laser
jan
focusing lens
vector
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.)
Expired
Application number
GB2839/75A
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.)
Crosfield Electronics Ltd
Original Assignee
Crosfield Electronics Ltd
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 Crosfield Electronics Ltd filed Critical Crosfield Electronics Ltd
Priority to GB2839/75A priority Critical patent/GB1533977A/en
Priority to US05/650,844 priority patent/US4015221A/en
Priority to DE19762602330 priority patent/DE2602330A1/en
Priority to JP51005490A priority patent/JPS5198501A/ja
Publication of GB1533977A publication Critical patent/GB1533977A/en
Expired 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
    • H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
    • H01S3/2308—Amplifier arrangements, e.g. MOPA
    • 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
    • B23K26/36—Removing material
    • B23K26/361—Removing material for deburring or mechanical trimming

Landscapes

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

Abstract

1533977 Engraving CROSFIELD ELECTRONICS Ltd 19 Jan 1976 [22 Jan 1975 26 March 1975] 2839/75 and 12763/75 Heading B6J To reduce the variation in the widths of holes or grooves excavated in a surface by a laser beam whose direction of polarization is controlled by a modulating signal, the polarized beam is applied to the surface through an analysing polarizer formed with a central aperture through which the central portion of the beam passes to the focusing lens regardless of its polarization. As shown Brewster windows 11 provide a polarized output from CO 2 laser 10. The electro-optic modulator 12 (e.g. of Gallium arsenide or Cadmium telluride) increases the orthogonal vector of polarization with respect to the vector in the original plane of polarization when a modulating voltage is applied at 13. The beam is amplified in a laser amplifier 14 and passed through Brewster angle polarizers 16 and 18 of germanium and of the transmission kind. Apertures 19 permit the central part of the beam to pass through focusing lens 20 to the surface 22 to be engraved. The method is applicable to the production of gravure printing surfaces.
GB2839/75A 1975-01-22 1975-01-22 Laser engraving of surfaces Expired GB1533977A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB2839/75A GB1533977A (en) 1975-01-22 1975-01-22 Laser engraving of surfaces
US05/650,844 US4015221A (en) 1975-01-22 1976-01-21 Preparation of gravure printing surfaces
DE19762602330 DE2602330A1 (en) 1975-01-22 1976-01-22 ENGRAVING PROCESS AND DEVICE FOR CARRYING OUT THE PROCESS
JP51005490A JPS5198501A (en) 1975-01-22 1976-01-22

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2839/75A GB1533977A (en) 1975-01-22 1975-01-22 Laser engraving of surfaces

Publications (1)

Publication Number Publication Date
GB1533977A true GB1533977A (en) 1978-11-29

Family

ID=9746928

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2839/75A Expired GB1533977A (en) 1975-01-22 1975-01-22 Laser engraving of surfaces

Country Status (1)

Country Link
GB (1) GB1533977A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005032756A1 (en) * 2003-09-16 2005-04-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for smoothing and polishing or structuring surfaces by means of modulated laser radiation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005032756A1 (en) * 2003-09-16 2005-04-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for smoothing and polishing or structuring surfaces by means of modulated laser radiation

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee