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Thread: Laser optics for multimode red

  1. #1
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    Default Laser optics for multimode red

    Hello, who can give me some informations about this optic combination.
    Laser diode multimode without collimator, first optic is part one of the cylindrical lens combination, second optic is a external collimator,
    third optic is the second part of the cylindrical lens combination.
    Laser diode is a multimode 638nm. Does anyone knows a way to buy these optics or informations about parameters? I think optic 2 and 3 is the same, not sure.
    Thanks for help!

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  2. #2
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    Why no collimator to start? I do collimator cyl lens pair. Beam telescope/spatial filter. OPT sells the cyl lens pair.

  3. #3
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    Quote Originally Posted by kecked View Post
    Why no collimator to start? I do collimator cyl lens pair. Beam telescope/spatial filter. OPT sells the cyl lens pair.
    the reason is you don't need a spatial filter. In this combination you have no "cross" and the beam is in both axis the same. But I have no idea which focus lenght the optics have. The beam divergence after 10m is 1,2mrad. And the convergence of all three beams is almost perfekt!
    do you see the light? It`s my laser. . . .

  4. #4
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    Since those lenses are positive, you can measure them with a spherometer, and calculate the focal length. A talented laserist can probably improvise a suitable spherometer with an 80 pitch screw from a mirror mount. A more skilled laserist can assume a HENE beam is collimated to infinity and measure the FL in one axis that way.

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  5. #5
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    Li Mimi of Goldenstar sells those sets at a good price tracky.
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