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  • VDX's Avatar
    Today, 12:06
    ... I've simulated (with discrete setups and "evolved") and tested some beam-optics with different lenses for monochromatic beams (high-power LED's and lasers) and found the results with aspherics and achromats comparable and much better than with "normal" spherics ... the wider the beam (or...
    11 replies | 238 view(s)
  • kecked's Avatar
    Today, 11:01
    if you beam is 3mm and the lens 10mm or more and you only use the center how does it make a difference. I get what your saying but the nature of this beam seems to render the issue a non issue. ive build many a beam expanders and never found pcx to be an issue. If I use flat pcx in I use flat...
    11 replies | 238 view(s)
  • kecked's Avatar
    Today, 10:55
    It appears the awe full smell may be Thymol. Itís a legit product but it has a distinct odor and is not meant for hands. Itís pretty alkaline. Relative of phenol.
    6 replies | 233 view(s)
  • laserist's Avatar
    Today, 05:35
    laserist replied to a thread CYGN-B in The Lounge
    Best guess pins N & R
    188 replies | 12031 view(s)
  • Greg's Avatar
    Today, 03:47
    Greg replied to a thread CYGN-B in The Lounge
    It turns out that the MYSTR2 and MYSTR4 routines and all the data are just the graphics that appear at the end of the song Synchronicity2. That leaves the MYSTRY routine that accesses the sine table and is doing something when it's 9 bits of input are stimulated. I wonder if it's possible that the...
    188 replies | 12031 view(s)
  • masterpj's Avatar
    Yesterday, 10:31
    Yes that will be a given. Wanna see how things look with so many wavelengths on video too. I'm assuming you are using really narrow band pass (I think that's what it's called) dichroics so you can combine both 405nm and 445nm without too much losses.. I think i've seen those in the past.. unless...
    21 replies | 612 view(s)
  • VDX's Avatar
    Yesterday, 07:38
    ... yes, this was my intention with "better 'Depth of Field' with wider beams" :cool: Viktor
    11 replies | 238 view(s)
  • VDX's Avatar
    Yesterday, 07:35
    VDX replied to a thread Ancient Diode Laser in Lasers, All Kinds.
    ... uh - that's pretty old!! I've got my first "high power" laserdiode around 1992 - bigger TO housing, 1 Watt max. CW, price was 1500 Deutschmarks :cool: Viktor
    1 replies | 68 view(s)
  • Eidetic's Avatar
    Yesterday, 06:35
    Here's one that's really, really old. This RCA type TA2628R GaAs laser was made in February of 1969 according to the data sheet in the box. Looking through old publications, I found the "new product introduction" for it in The Laser Newsletter of December 1966, and the ad below in Laser Focus the...
    1 replies | 68 view(s)
  • Eidetic's Avatar
    Yesterday, 06:20
    It's my understanding that achromats are better to use than singlets for monochromatic light because they are also corrected for spherical aberration, allowing much more of the lens to be used.
    11 replies | 238 view(s)
  • dkumpula's Avatar
    Yesterday, 04:10
    +1 from me, Hank! On FB, I'm only connected to fellow laserists and laserist groups, so I avoid family / other folks that use FB to reveal their darker views. As for Pangolin, I've only seen them be extremely generous to the SELEM crowd and to me personally over many years. (Kudos to...
    16 replies | 688 view(s)
  • absolom7691's Avatar
    07-11-2020, 19:24
    Agreed!! Bill has helped me out on a number of occasions. Customer service with Pangolin is tops, no matter how much or how little you spend!
    16 replies | 688 view(s)
  • hakzaw1's Avatar
    07-11-2020, 18:47
    I give Bill 100% credit for my becoming more than a hobby level Chi-projector owner. PANGO is very generous with door prizes at SELEM and other meets. and I was impressed with how Bill treats everyone the same--like VIPs. ---THANKS all at Pangolin.. Len MYB we should be buying Bill a ...
    16 replies | 688 view(s)
  • absolom7691's Avatar
    07-11-2020, 14:46
    I understand. For those who publish shows on forums/youtube/facebook, it makes sense to have the highest quality to add validity to a new product. For my living room laser show, that's the equivalent of using a Ferrari to pick up the groceries! My projectors are all single-mode 250mW...
    21 replies | 612 view(s)
  • dkumpula's Avatar
    07-11-2020, 13:42
    Nice work, PJ! I'm plugging away at it, I swear! :) I think I'm a week away from completing this two Saturn build. Things are obviously a bit messy at the current state. For those of you that I haven't told, this build is essentially half of this 4 Saturn single-mode build. So that's...
    21 replies | 612 view(s)
  • james's Avatar
    07-11-2020, 07:15
    A harmonograph is a physical machine. There are variations on the idea, but the classic design is modeled in math simulations using four pendulums. A pendulum does indeed swing in sinusoidal motion, but it takes two sin functions to emulate the fact that it can swing in ellipses (not just one...
    319 replies | 77176 view(s)
  • buffo's Avatar
    07-11-2020, 05:47
    Wow - an Amiga reference! Now that's the sort of compliment I can get behind! :) Adam
    21 replies | 612 view(s)
  • buffo's Avatar
    07-11-2020, 05:25
    Completely agree. Soap and water is far superior to hand sanitizer! Although there are situations where hand sanitizer is the only option, as soon as you get to a place where you can wash with soap and water, you should always do that even if you used hand sanitizer previously. (And remember to...
    6 replies | 233 view(s)
  • buffo's Avatar
    07-11-2020, 04:49
    I'm going to take a stab at this. Maybe I'm missing something, but this seems like it's a solved problem? Yup - agreed. But all pendulums follow sinusoidal motion with decaying amplitude. (A pendulum is pretty much the definitive example of sinusoidal motion, at least in classical...
    319 replies | 77176 view(s)
  • buffo's Avatar
    07-11-2020, 04:31
    buffo replied to a thread Galvo/Amp Upgrade in Modifications
    Thanks to Andrew for re-drawing the schematic. :) Also, he correctly pointed out that interrupting the ground connection on the modulation input won't work because of the shared ground on the power input side. I had forgotten about that! But yeah, the correct method is to interrupt the positive...
    15 replies | 343 view(s)
  • buffo's Avatar
    07-11-2020, 03:52
    buffo replied to a thread Hello All, Laser Question/Help in Help!
    I agree with David - there's not much harm you can do to the 506 scanners because the amps will shut down if you do something incredibly stupid, and if you're just doing something marginally stupid the scanners themselves will simply grin and bear it, albeit with a degraded image. :) ...
    53 replies | 5980 view(s)
  • Pangolin's Avatar
    07-10-2020, 20:34
    Yep, I know what you mean. For beam shows, the separation is almost invisible but for graphics, the trick is to just "hide it", by never doing anything that has red alone. I'm interested to see David Kumpula's assembly since he combines using dichroic rather than strictly edge combining as your...
    21 replies | 612 view(s)
  • rodman1369's Avatar
    07-10-2020, 13:05
    My wonderful spouse asked me (again) what I wanted for my Birthday! She asked: What would give me Joy! :D She has now authorized me to order my 2nd Anycubic Mega S on sale for $229.00 Free Shipping from www.Anycubic.com Now...I have to do some rearranging to make room! :cool:
    44 replies | 2515 view(s)
  • dkumpula's Avatar
    07-10-2020, 13:01
    Glad the operation went well and you learned some new skills. Well, first you shouldn't be projecting at a rate faster than the scanners are tuned for. I assume your scanners were tuned for 30kpps as they appear to have 5mm mirrors. I'm sure Pangolin included a sheet in your package that...
    53 replies | 5980 view(s)
  • bungy's Avatar
    07-10-2020, 09:50
    bungy replied to a thread Hello All, Laser Question/Help in Help!
    Glad to see you got it running!
    53 replies | 5980 view(s)
  • bungy's Avatar
    07-10-2020, 09:46
    Wow, beam brush is amazing! So glad to see useful innovation still happening.
    21 replies | 612 view(s)
  • masterpj's Avatar
    07-10-2020, 08:35
    I so wanna fix it with a new module but that's a matter of waiting and time. For now ill settle for it and be careful with my use of reds with this laser module :desire: I really think beam brush made this so much more organic and filling and this was just an 8 hour job. Working on much more in...
    21 replies | 612 view(s)
  • jdavis7765's Avatar
    07-10-2020, 06:43
    jdavis7765 replied to a thread Galvo/Amp Upgrade in Modifications
    I updated the original thread here with the final results if you want to check it out. Thanks all for answering my questions along the way!
    15 replies | 343 view(s)
  • jdavis7765's Avatar
    07-10-2020, 06:42
    My journey is now complete, for now! Guess upgraded (better) lasers are next as well as properly wiring saftey key and the like. The scannermax scanners are 1000 times better than the original scanners in the laser. Thanks for all who have helped this novice hobbyist along through the process and...
    53 replies | 5980 view(s)
  • absolom7691's Avatar
    07-10-2020, 04:21
    Interesting. When I printed in vase mode, it was clear. In fact, I have made fiber optic with it (lossy but still carried light).
    44 replies | 2515 view(s)
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