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Thread: 640nm lasers on ebay

  1. #1
    Join Date
    Jul 2007
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    Default 640nm lasers on ebay

    what does anyone think of these dodgy or what ???
    seem very cheap for 640nm
    http://cgi.ebay.co.uk/ws/eBayISAPI.d...n%3D2%26ps%3D5

  2. #2
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    Default

    i dono but it seems kinda fishy
    -Josh

  3. #3
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    Default

    Istambul Turkey?...

    What about Abuja Nigeria?
    I hired an Italian guy to do my wires. Now they look like spaghetti!

  4. #4
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    Default 640nm

    i email the guy and he replyed 2 minutes later with this

    spectral width is 635 - 645 nm center wawelength is 640 nm. we have datasheet in printed format. we are preparing datasheet in pdf format as soon as possible.

    still dont know what to think

  5. #5
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    Default

    that is the same current range as a long die open can diode can take.. and this unit is mounted in a drilled-out resistor heatsink. My guess.. 655-660nm, not 640.

  6. #6
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    Cool

    My thoughts exactly. I'm guessing that they're fudging on the wavelength.

    Still, at ~ $80, it's not a bad deal for a 300 mw laser, even if it is 650 - 660 nm.

    Adam

  7. #7
    Join Date
    Jun 2008
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    Stockholm, sweden
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    Default fishy

    would like to see the beamspecs of this couse the price is not so bad.

    but this picture makes me worry alitle bit.

    Wery wide in the start and then goes thin about 10cm and then starts wideing.

    Ive done something similar to this with an normal magnifying glass and it looks excactly the same although 1meter away the dot is big as a fotball (soccer ball)
    Attached Thumbnails Attached Thumbnails b590_1.jpg  


  8. #8
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    Default

    310mW ...... but for how many seconds ?


    Karl

  9. #9
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    Oct 2006
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    Thumbs up

    Quote Originally Posted by Banthai View Post
    310mW ...... but for how many seconds ?


    Karl
    Exactly... ....................
    Love, peace, and grease,

    allthat... aka: aaron@pangolin

  10. #10
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    Default

    The guarantee condition must be until damaging… junk

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