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Thread: Gratings! Who sells them?

  1. #31
    Join Date
    Feb 2015
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    Default Don't forget Rainbow Symphony!

    Rainbow Symphony (https://www.rainbowsymphony.com/diffraction-gratings) has reasonably priced single and double-axis gratings. They have lots of other possible optical toys that may be useful too. Also, nice people...

    Ron

  2. #32
    Join Date
    Jul 2010
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    Netherlands
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    Quote Originally Posted by ronhip View Post
    Rainbow Symphony (https://www.rainbowsymphony.com/diffraction-gratings) has reasonably priced single and double-axis gratings. They have lots of other possible optical toys that may be useful too. Also, nice people...

    Ron
    Looks like the same ones from the ebay seller from israel.

  3. #33
    Join Date
    Dec 2007
    Location
    The West
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    1,285

    Default

    I have some, pm me if interested
    RGB laser projectors
    Pangolin Beyond .NET
    APC40 Midi controllers
    Pangolin FB3 controllers
    DZ splitter
    LS MegaWatt Green Machine

  4. #34
    Join Date
    Nov 2005
    Location
    Melbourne, Australia
    Posts
    3,702

    Default

    Hey mate, I have some Creative laser ones floating around somewhere ( glass, nice), linear and burst, I think around 30mm x 30mm square
    KVANT Australian projector sales
    https://www.facebook.com/kvantaus/

    Lasershowparts- Laser Parts at great prices
    https://www.facebook.com/lasershowparts/

  5. #35
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    Jul 2010
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    Netherlands
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    Default

    Quote Originally Posted by dave View Post
    Hey mate, I have some Creative laser ones floating around somewhere ( glass, nice), linear and burst, I think around 30mm x 30mm square
    Interested and replied on facebook!

  6. #36
    Join Date
    Nov 2008
    Location
    Cleveland Ohio
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    Like the discharge tubes for cal sources. Too bad they don’t sell the power supply they are out of stock.

  7. #37
    Join Date
    Jan 2006
    Location
    Charleston, SC
    Posts
    2,147,489,446

    Default

    Quote Originally Posted by Eidetic View Post
    I heard the machida gratings were just 50 micron fibers laid next to each other, using a couple screws of the proper pitch to keep them aligned. Might be cheapest to make your own!
    All of the original Machida gratings that I've seen were made of glass. However, there were several knock-offs (including one called a "Michado" or something), and at least one of the clone gratings was, in fact, nothing but a bunch of optical fiber placed side-by-side and glued in place.

    I bought several "Laser Line Generating Optics" from Meredith Instruments back around 1999-2000, and those were also made up of a bunch of optical fiber. The fiber strands were glued to one side of a round metal disc with a hole in the center. (Basically like a washer you'd put on a nut and bolt.) They generated a spray of perhaps 400 tiny beams in a 175 degree fan - maybe 178 degrees even. There was almost no variation in brightness among the beams.

    These things were cheap as hell (like, under $10 delivered) and were mounted in a heavy aluminum block that had a rotating portion with a solenoid that would engage the teeth around the edge of the mount to stop the rotation.

    Here's what the actual element looks like once you removed it from the mount: https://photonlexicon.com/gallery/bu...LineOptic9.jpg

    And this is the effect it would create: https://photonlexicon.com/gallery/bu...a/DSCF0103.jpg

    That is 10 mw of DPSS 532 nm green, 15 mw of Argon 488 nm, and ~ 8 mw of 632.8 nm from a HeNe in a perfectly dark room. You only see what made it through the doorway, so it's hard to tell just how wide the fan really is, but take my word for it: it's as close to 180 degrees as anything you'll ever see.

    I'm sure you could easily make this yourself with some fiber, a washer, a pair of scissors, and some hot glue...

    Adam

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