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Thread: 445nm blue diode build options

  1. #21
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    Dec 2006
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    Quote Originally Posted by kl79 View Post
    Lasorb for a 30$ diode ? not for me !

    The first risk on burning the diode is when I'm welding the lasorb for me
    i hear what your saying but i want to go for long life
    Eat Sleep Lase Repeat

  2. #22
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    I'm currently negotiating with a seller to review some acrylic fiber optic of diameters 0.5, 0.75, 1 and 2 millimeters to check if they would work as fast axis collimators...

    if I have a positive answer I'll let you know, and I'll try the fast axis fiber lens solution as well as cylinder lens and prism pair

  3. #23
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    Apr 2006
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    it would be nice if we could get a microlaserlabs (laserman532) type deck for combining a few of these after we figure out a way of collimating them decently

  4. #24
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    Sep 2008
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    Keep us up to date.

  5. #25
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    I just ordered a sample pack to evaluate the fibers... I'll let you know!

  6. #26
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    Has anyone measured the divergence using the stock lens from the projector? It looks like a fairly nice AR coated glass asphere, so if anything it seems our best bet would be to start with that lens and then find a cheep source of anamorphic prisms to add afterward. Did the research for the surplusshed ones every go anywhere?

  7. #27
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    I failed finding prism pairs cheaper than thorlabs (approx. 40$ the pair, coated for blue if I recall)

    Same for the cylindrical lenses

    but I have those fibers, diameters .25, .5, .75, 1, 1.5 and 2 mm, so it should be a good start at finding a fast axis lens suitable for that diode (even just gluing the 2mm one on the window could work)

  8. #28
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    There was some research done getting cheep optics from surplusshed, a few candidates are:
    http://www.surplusshed.com/pages/item/l2171.html
    http://www.surplusshed.com/pages/item/l10160.html - has some kind of AR coat at least


    There are also options like
    http://www.altechna.com/product_details.php?id=374

  9. #29
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    Jun 2008
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    Yellowknife, NT, Canada
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    DIY TEC controller, parts are about $20-30 and it's quite easy to build. Uses a fan speed PWM controller to control the TEC.


  10. #30
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    Jan 2009
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    Germany
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    Quote Originally Posted by MechEng3 View Post
    What needs to be made certain...
    1 Is this the same diodes that were on fleabay
    2 If not has anyone made any conclusive testing...graphs of current and PO
    Got my first Diode from the 2000 Lumens Projektor today. Here is a a quick and dirty power vs current curve:
    Click image for larger version. 

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    Treshold arround 200mA
    Slope efficiency 1.4W/A
    From these specs it looks more like a 1W diode!?
    Specs are absolutely the same as the ebay diodes.
    Collimated with lens27 and two prisms from surplusshed I get 380mW at 500mA after optics with a nice beam:
    Click image for larger version. 

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    Picture made without fog and not really dark outside.

    Andreas

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