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  1. Bionic-Badger

    goggles for eclipse?

    I'll definitely do some more testing, notably because the light I could see was greenish, which is not noted in the filter spec.
  2. Bionic-Badger

    goggles for eclipse?

    So years ago I bought an eBay lot of old laser goggles for like $80 or something for 7-8 different goggles. One of the goggles in the set was this odd, very dark one with really high ODs that I had no idea what I'd ever use it for: Well it appears to be the perfect pair of goggles for...
  3. Bionic-Badger

    Software Recommendation

    I wouldn't be surprised if this is some spammer that'll post a bunch of inane, semi-on-topic-in-the-off-topic-forum posts and then at some later date modify the post with spam links or something.
  4. Bionic-Badger

    Polygon mirrors?

    Surplus shed used to have them, but not anymore. I think I bought a few, but didn't put them to any use (they're not at my current location, so I can't sell/ship you one). The mirror surface on them is fairly narrow, about 2-3 mm wide, so kind of hard to keep a good beam on it without some...
  5. Bionic-Badger

    How to manage frozen pipes

    Maybe let it drip, but also cover it with a blanket or some sort of cover (don't let it get wet) to reduce the effects of convection?
  6. Bionic-Badger

    Good external drive for backups, but rarely used.

    Yes, "Plausible deniability" -- that was the term I was looking for!
  7. Bionic-Badger

    Good external drive for backups, but rarely used.

    Yeah, the TrueCrypt story is indeed strange, with theories about him leaving encoded messages saying that it's been compromised and stuff. My personal thoughts are that he was threatened because it was too hard to crack, had measures that provided reasonable doubt (hidden volumes, etc.), and...
  8. Bionic-Badger

    OPT Lasers Cylindric lenses - NUBM44 beam correction tests

    The problem with the NUBM44 and other wide-rectangle-beam shaped laser diodes is that one axis (horizontal or vertical) expands at a different rate than the other. So while you can make your lens focus one axis so that it doesn't diverge (much), the other axis will continue to expand. This...
  9. Bionic-Badger

    Maximizing Scanner Speed

    If you don't have to draw anything specific, could you just use a rotating mirror? You could also home-brew something like what Kuntman with his raster-like scanner.
  10. Bionic-Badger

    FDA wants to restrict green & blue laser pointers as "defective"

    I don't think I'd really mind seeing high-powered laser "pointers" banned from sale or import, at least mass produced types. It'd be really hard to regulate people building their own. Mostly I'm concerned about idiots buying them online and then hurting people or causing problems. If the only...
  11. Bionic-Badger

    What Is It... thread for unidentified laser optic goodies

    Re: Kind sirs, please tell me how a twin PBS is used I think that's a 3CCD prism, not DLP. That's why the white light is split into its respective "channels." Alaskan: I don't know about the twin PBS. It looks like the center prism is shared by each of the two PBSes. Maybe it's designed...
  12. Bionic-Badger

    Beam RGB laser projector

    Those beams diverge over distances already. You might be able to just use the projectors as-is and they'll get fat on their own.
  13. Bionic-Badger

    The proper effective cheap safety glasses

    What I've done in the past is look for cheap certified used goggles on eBay. Not the ones that are sold out of China, but some of the surplus ones that come from time to time. Sometimes you'll find some really nice ones for pretty cheap, for example ones that shield against Argon lasers, which...
  14. Bionic-Badger

    Tech hood combine reflect optics

    I haven't used those dichros above, but I expect they're probably decent, just as those polarized beam cubes that are sold from China. The latter have pretty good specs for their price. With laser power being what it is, the ability to correct the red laser's beam profile seems to be the real...
  15. Bionic-Badger

    The Worst Insect Ever! (NO PICS)

    4-5"?!?! OH HELL NOoo!
  16. Bionic-Badger

    The Worst Insect Ever! (NO PICS)

    I've seen two in my life and yeah, they're pretty creepy. I'm surprised it bit your cat though; usually they just run away super fast. I tend to leave those bug-eating bugs alone though, with the hope that they'll kill the gnats that sometimes appear in my home.
  17. Bionic-Badger

    Space Discussion Thread

    If the automation we see today is any indication, automation will sap away jobs, but will not change society's view that people should occupy most of their time with work. Labor is a way of keeping people busy and unable to contemplate things such as rebelling or demanding changes to the status...
  18. Bionic-Badger

    Meme Thread

  19. Bionic-Badger

    The proper effective cheap safety glasses

    Probably not. They don't even specify any protection rating (as if it can be trusted). Plus, it's not certain what safety expectations there are for engravers. It might just be to make it easier to see the surface, but not protect against a direct hit. Your eyes are worth a bit more than $5...
  20. Bionic-Badger

    High CRI LEDs?

    You can try something like this. For all this effort you might consider just using an incandescent light source.