Recent content by Jacob_Norman

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  1. J

    Shadowgraph Research lamp made from several LEDs

    The shadowgraph system we use is as follows: A retroreflective screen is placed at one end of the test room, with a camera opposite. The test specimen is placed between the 2. A glass rod, roughly .5" diameter, cut at a 45* angle on one end and mirrored on the same end is mounted to the end of...
  2. J

    Shadowgraph Research lamp made from several LEDs

    Thanks for the suggestions. We may simply end up having to move to a more powerful version of arc lamp. I'm not sure lasers are what we want, unless we can get a laser that has several frequencies it will emit in simultaneously. That may be what the Lambda 421 was created for. Thanks for all...
  3. J

    Shadowgraph Research lamp made from several LEDs

    In other words, we CANNOT scale up an emission area in order to scale up intensity. I am interested in what you're implying when you say "by purely optical means".
  4. J

    Shadowgraph Research lamp made from several LEDs

    Our arc lamp is rated at 1000W, with an estimated efficiency of 30 lumens/W, meaning roughly 30,000 lumens. I can't give a much more precise answer than that, as the lamps aren't explicitly rated for lumens, and the efficiency rating is from a different company altogether. But perhaps one of you...
  5. J

    Shadowgraph Research lamp made from several LEDs

    Hello all, I am a researcher at a US university, and my adviser has instructed me to come up with a solution to a lighting issue we're having. "Shadowgraph" is a technique used for high-speed imaging, gas and density-based research. For example, shadowgraphs are commonly used to view the blast...
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