Design of an Optical System for High Power CO2 Laser Cutting

D.F. de Lange, J. Meijer, Jakob Skov Nielsen

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    The results of a design study for the optical system for cutting with high power CO2 lasers (6 kW and up) will be presented. As transparent materials cannot be used for these power levels, mirrors have been applied. A coaxial cutting gas supply has been designed with a laser beam entrance into th pressured gas chamber, by means of an intermediate focus. It allows the beam to enter the gas chamber through a small nozzle opening. The final optical system consists of two off-axis aspherical mirrors. In general aspherical elements are very sensitive for positional or angular errors, resulting in considerable astigmatism (basically coma). In addition , unavoidable manufacuring tolerances contribute to deteriorate the optical quality. However, it is shown that the particular combination of two aspherical elementscompensate each other, leading to a high quality optical performance, which is virtually independent of the entering beam angle or position. manufacturing tolerances have been compensated in a one time adjustment during the assembly of the optical system. Preliminary cutting results in 13 mm thick steel in a shipyard application show a signinficant improvement in the cutting performance.
    Original languageEnglish
    Title of host publicationICALEO 2003
    Place of PublicationOrlando, FL
    PublisherLaser Institute of America
    Publication date2003
    Publication statusPublished - 2003
    Event22nd International Congress on Applications of Laser and Electro-Optics - Jacksonville, FL, United States
    Duration: 13 Oct 200316 Oct 2003

    Conference

    Conference22nd International Congress on Applications of Laser and Electro-Optics
    CountryUnited States
    CityJacksonville, FL
    Period13/10/200316/10/2003

    Cite this

    de Lange, D. F., Meijer, J., & Nielsen, J. S. (2003). Design of an Optical System for High Power CO2 Laser Cutting. In ICALEO 2003 Laser Institute of America. http://www.ipl.dtu.dk/publikation/7906/dk/