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Recent content by 18LJ

  1. 18LJ

    Explorations at the extremes

    With that tiny hole we punch nd then with the light that shines thru it might just be enough to grab the attention of our neighbor universes ancient scourge cthulu to come investigate the hole and worm his tentacles thru that tiny hole onto our plane to spread his beastial benevolence with...
  2. 18LJ

    interesting article that explains plasma mirrors fairly well

    I thought this was a decent article that did a good job at explaining (without excessive jargon/techspeak so that anyone can grasp) high power pulse generation and plasma mirrors https://arstechnica.com/science/2019/09/trampoline-mirror-may-push-laser-pulse-through-fabric-of-the-universe/.
  3. 18LJ

    A 600nm emitting semiconductor laser for only 5$?!

    Ya i was just referring to the NATO standard round. The first link that came up kinda referred to the ar15 and m4 loosely and interchangeably. And I realize the pressure will vary between rifles and barrels and there's a million different things that influence the pressure and velocity. I just...
  4. 18LJ

    Osu! visualizations with lasers

    Cool looks entertaining
  5. 18LJ

    A 600nm emitting semiconductor laser for only 5$?!

    https://www.unipress.waw.pl/wtlab/index.php?file=kop1.php Ok ill admit to the obscenely clickbait-eyness of the title but i couldn't help myself and I know that people are gonna see the thread title and instantly their bullsh#t alarm goes to defcon 10x ready to tear into this fool claiming to...
  6. 18LJ

    Outstanding laser art

    I'm usually kinda snobby when it comes to laser shows and displays. I mean it's all cool eyecandy and all, but scanning and tunnelling effects get kinda stale after awhile and ilda animations are often kinda cheesy and uninspired when it comes to artistic/creative reach. This installation...
  7. 18LJ

    Help identify this laser please, looks like vintage Surefire

    A laser sight for a rifle? Or for like a rangefinder or measurement equip? If it is for a rifle mount it must be a fairly tough sturdy tube . Id suspect that the mirrors would frequently be thrown off alignment from the recoil? But then again its pretty old and stuff back then was usually...
  8. 18LJ

    Will my tank glass be safe?

    I would say shine it thru the top thru the water (wear eye protection) Even if its only a watt or 2 its going to heat up a small spot of glass much quicker than the rest of the surrounding glass with liquid cooling one side of the glass. It might not crack normally but water is about 8...
  9. 18LJ

    495nm Leadlight

    Thanks for the infofrom you and everyone else that chimed in. I look forward to seeing if more of these pop up after new years. Nice build btw what is your driver set to/how much output are you getting do you know?
  10. 18LJ

    495nm Leadlight

    So uhm where are all these 495 diodes coming from? Is someone here linked with a sharp distributor? Does someone have credetials or a job that qualify to get engineering samples or development packs? Ive found that german site lasertack to sell them for too much money and its really irritating...
  11. 18LJ

    My new 405 + Fluorescent Calcite

    Cool pics im gonna dig thru my rock crystal collection and see what kinda cool effects i can get out of em. Glad to see your build was a sucess compared to your last one, keep up the good work!
  12. 18LJ

    I quit

    Good luck with ur new build. Alaskan is a saint for hooking you up like that, it never ceases to amaze me how kickass this site and its members are. Though there have been times where ive been bugged or put off or ive had gripes or took issues with some things here or there that arent even a big...
  13. 18LJ

    I quit

    Sir i have a few things to say to you. #1 quit cryin and bein a lil soft batch about it. This tragedy that has befallen you is not some grand conspiracy cooked up in the nether regions of spacetime, the collective conciousness of the universe in whole has not plotted to sabotage your new light...
  14. 18LJ

    Could someone help me out on this.

    This website is amazing i could spend years just digging thru random posts learning new things every day
  15. 18LJ

    PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please sub

    Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please Though i lack the skills to do anything meaningful with this id really like to see one of the pros on here give making custom mirrors a shot https://www.govdeals.com/index.cfm?fa=Main.Item&itemid=1477&acctid=3780




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