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Thread: which side of the lens holder goe where?

  1. #1
    Join Date
    Oct 2016
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    209

    Default which side of the lens holder goe where?

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    Is the side of the barrel on the left side in the picture the one which faces the diode, or the side shown on the right side of the image?
    Refresh my memory please.

  2. #2
    Join Date
    Aug 2010
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    Default


    If you are referring to the top (visible face) the pic on the right faces the diode so as to get the lens as close as possible to the diode.
    Ideally once the light exits the other end, the fast axis will be almost parallel (not expanding).
    The slow axis, will be over corrected and initially converging, only to diverge again within millimetres and start expanding again unless correction optics are used to correct the beam.

    Careful.... those look like plastic barrels ...do not use these with high power multi-mode diodes !

    Cheers
    Last edited by catalanjo; 03-05-2017 at 13:47. Reason: typo

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