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Thread: focusing lens for combining reds

  1. #1
    Join Date
    Dec 2006
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    Default focusing lens for combining reds

    i want to look at making 1watt of 650nm anyone got any links to some good focusing lenses i can use?
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  2. #2
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    Default

    like so

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  3. #3
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    Jul 2007
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    west sussex uk
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    Default me too

    snap me too just stated on mine this weekend
    that project red looks just soooooo nice i want

  4. #4
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    Dec 2007
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    Default

    Btw... That red diode stack was a project of Phillip from LaserFreak.net.
    More pics can be seen at the bottom of this thread.

  5. #5
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    May 2007
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    Default

    Phil is also a member here d3c1x.

    It is a very nice project. I have a PM from him somewhere that told me the focal lengths he used. Let me try to find that...

  6. #6
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    well all i really need is some type of lens and aixiz is was to small
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  7. #7
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    Default

    I cant find the exact PM, however if I recall correctly the focal lengths were F-120mm and F-30mm.

    But that is a subjective idea since there is no right or wrong with lens' here... at least thats what I gather. Everyone has their own ideas as to what is right and what isn't.

  8. #8
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    Default

    Wow, I was just drawing up diagrams last night too!

    He used achromat lenses and the losses were pretty high. I'm considering using lenses form a microscope 10x eyepiece, but the losses again will be higher than with a dedicated beam expander in reverse. Also there is a question of power density handling.

  9. #9
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    Maybe the three of us could pool together some of our ideas into one to develop 3 different and way better than what they could have been red lasers. I was thinking 18 lasers for me to make a 3x3 square configuration. That would give me a resultant beam of about 8-9mm or so square with some losses on the mirrors. Then it wouldn't be very hard to reduce the beam much futher than that, and with minimal increased divergence.

    -Max

  10. #10
    Join Date
    Dec 2006
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    Default

    im thinking of using 5 reds and no cube. just straight into a lens
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