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Thread: Recent batch of 455nm 500mW laser diodes made available on YKW ...

  1. #11
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    Quote Originally Posted by dave View Post
    Emitter width about 7um on the 500mw diode
    ?? Maybe 7x150um ...

    Piotr.K

  2. #12
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    Ouch, thats a bit of shipping eh..

    You snagged a diode as well?

    I got some from Thor ( I milled up the mount for the lens tube tho ).. Ill need another 2 sets as well now So, if you want, maybe I can order for both of us, then we split the shipping from the states.. Maybe I can do some milling for you as well if needed, while I'm at it...

    Shoot me a PM


    Whooo, 4 1.7w rgbs soon


    Quote Originally Posted by loopee View Post
    Hey Dave


    What Lens did you use and where did you get them from?


    I was going to buy the ones from mccarrot (http://store.laserextreme.nl) but I’m not going to pay 200 euro for shipping to Australia for a couple of lenses and mounts totaling 134 euro!




    Troy
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  3. #13
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    Quote Originally Posted by loopee View Post
    Hey Dave


    What Lens did you use and where did you get them from?


    I was going to buy the ones from mccarrot (http://store.laserextreme.nl) but Iím not going to pay 200 euro for shipping to Australia for a couple of lenses and mounts totaling 134 euro!




    Troy
    Shipping to australia upto 2KG is 25 euro.

    Don't forget to choose the collimator with blue AR coating for this diode.
    The collimator will work perfect with this diode, only you will end u with a rectangular beam profile.

    You could add two prisms to shape the beam like RGB lasersystems does.

  4. #14
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    It seems to me that in the best case these diodes will have the same fat beam diameter and high divergence that many of the multimode 650nm red systems we see around here exhibit. Based on my experience with multimode diodes, a setup without anamorphic prisms or at least a cylinder/GRIN lens to go with the aspheric lens will produce a fairly wide, flat and highly divergent rectangular beam whose characteristics would be pretty undesirable compared to a multimode setup that is properly collimated.
    Last edited by ElektroFreak; 05-07-2010 at 08:17.

  5. #15
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    Quote Originally Posted by mccarrot View Post
    Shipping to australia upto 2KG is 25 euro.
    Maybe so, but when I went to checkout after I had selected the items your site added 200 euro for shipping, maybe something you need to look into

    Also lack of Paypal/Google Checkout or credit card acceptance doesn't inspire me neither. Not saying your dishonest or anything but it's a hassle to bank transfer when the other options are far simpler (it also doesn't help me impulse buy)

    Sorry for hijacking the thread

    Troy
    RTI Piko RGB 4 Projector
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  6. #16
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    Here's a link for those who might not already know the best methods of correcting the output of laser diodes. It's quite basic, but it is helpful nonetheless: http://laser.physics.sunysb.edu/~xue...breport/p2.htm

  7. #17
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    Quote Originally Posted by ElektroFreak View Post
    It seems to me that in the best case these diodes will have the same fat beam diameter and high divergence that many of the multimode 650nm red systems we see around here exhibit. Based on my experience with multimode diodes, a setup without anamorphic prisms or at least a cylinder/GRIN lens to go with the aspheric lens will produce a fairly wide, flat and highly divergent rectangular beam whose characteristics would be pretty undesirable compared to a multimode setup that is properly collimated.
    nope, as dave said, you only need an aspheric. I mean, we would know, we have 3 nichias (2 500mw, and a 1 watt).

    we have achieved way better beam specs than wide stripe reds, with only an aspheric lense. They are definitely not round beams, but they certainly aren't flashlights.

    All this hoo haa about big stripe reds is crap really. Especially if you're prime application is audience scanning. We use a few of them, including 2 watts of 635nm in our 4 watt RGB, and it looks fine, and is safer, and unless you're specifically trying to do graphics a long way away, is not really an issue.
    Now proudly stocking and offering the best deals on laser-wave

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  8. #18
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    Wasn't trying to question your expertise.. easy now. There's no denying that there are ways to improve on beam quality when using multimode diodes, especially those without FAC. That's all I'm saying. You could even couple into fiber and get a perfectly circular flat-top profile, and you'd only need a very short piece of fiber to do it. If you're not doing crowd scanning, a nice symmetrical beam with the lowest possible divergence might be desirable. Also, power loss past the galvo mirrors is an issue for some folks.

    Given that your application includes crowd scanning, higher divergence is better without a doubt. Would you be willing to post some profile pics here near and far field with some size references? I and others here don't have experience with these new blue diodes, so really I'm only speaking of what I know about red and IR diodes. It would be cool to see what can be done with an aspheric, especially if the end result is a comparatively good quality beam..
    Last edited by ElektroFreak; 05-07-2010 at 17:12.

  9. #19
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    what is this?

    A blue diode 450nm 500mW?
    Is it for sale and how much?

  10. #20
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    Quote Originally Posted by rfourt View Post
    what is this?

    A blue diode 450nm 500mW?
    Is it for sale and how much?
    We got the last 2
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