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IndustryArena Forum > Laser Engraving and Cutting Machines > Laser Hardware > Using a lense to selectively alter the cutting beam profile
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  1. #1
    Join Date
    Sep 2016
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    0

    Using a lense to selectively alter the cutting beam profile

    A friend of mine is experimenting with one of the inexpensive Chinese laser cutters, the beam of which passes through a lense that focuses the beam to a point.
    We'd like to convert the beam of that cutter from a converging beam to a parallel beam at a selectable point.


    Information found on the net indicates that placing a cylindrical lense in the beam path will alter a converging beam to a parallel beam as we'd like but we don't know enough about lenses to know we correctly understand this solution.

    We've found a "25mm focal length cylindrical lense" on eBay -New Edmund Optics Cylindrical Lens 12 5mm Dia 25mm FL BK7 P N 46194 | eBay - but we don't know what a "25mm focal length" is in such an lense, or if the lense we found would suit our purpose.


    Any thoughts would be greatly appreciated.

    TIA

  2. #2
    Join Date
    Oct 2008
    Posts
    16
    Are you trying to do a light-saber?

    .. the lens you are talking about are something like this.. no? (Attached file)


    Quote Originally Posted by jeb6319 View Post
    A friend of mine is experimenting with one of the inexpensive Chinese laser cutters, the beam of which passes through a lense that focuses the beam to a point.
    We'd like to convert the beam of that cutter from a converging beam to a parallel beam at a selectable point.


    Information found on the net indicates that placing a cylindrical lense in the beam path will alter a converging beam to a parallel beam as we'd like but we don't know enough about lenses to know we correctly understand this solution.

    We've found a "25mm focal length cylindrical lense" on eBay -New Edmund Optics Cylindrical Lens 12 5mm Dia 25mm FL BK7 P N 46194 | eBay - but we don't know what a "25mm focal length" is in such an lense, or if the lense we found would suit our purpose.


    Any thoughts would be greatly appreciated.

    TIA

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