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  • Grix's Avatar
    03-01-2024, 10:53
    I'd like to present the latest news in IDN. IDN (ILDA Digital Network), as many of you know, is ILDA's open standard for streaming laser data over networks. IMO this kind of protocol is sorely needed in the industry, to standardize the various different protocols, many of them proprietary,...
    9 replies | 10678 view(s)
  • Laser57's Avatar
    02-28-2024, 21:26
    If buying green laser diodes from Techhood in China, you might not get what you are paying for. I purchased a dozen "low hour tin pin NDG7475" diodes at half price which were really NDG700 diodes or something less, the divergence was also much greater than the NDG7475 would have produced. It took...
    7 replies | 1038 view(s)
  • laserLips's Avatar
    03-05-2024, 11:47
    Hi everyone. Long time no see. It's been ages since I've posted here. Was just wondering is GoldenStar Lasers are still operating? I sent a few emails to Mini and Wini but nothing back. I'm assuming they are finished. Can anyone confirm this and if so what are our options these days? ...
    1 replies | 1284 view(s)
  • Loreadarkshade's Avatar
    03-12-2024, 05:38
    Loreadarkshade started a thread NUBM0G in The Lounge
    NUBM0G Decanned hitting over 8 watts. This little monster can output a gorgeous 473nm at around 6.2-6.5A and even richer cyan when pushed a bit harder. Measurements taken with DTR 25mm Copper module, G2 lens, Sanwu LPM-20T, 21°C TEC cryo-block Link to test results:...
    3 replies | 344 view(s)
  • atomd's Avatar
    03-09-2024, 13:11
    Hi, I'm building ECDL and looking for grating to lock the resonator. Preferably blazed around 520nm, but I'm open to any offers. The grating can be a bit denser or a bit more sparse but somewhere in 1050-1450.
    1 replies | 627 view(s)
  • Rupesh's Avatar
    03-23-2024, 02:32
    Hello Folks! I have a question on scanners. Since my regularly work is with laser graphics / animation related shows. I need your suggestions on having good scanners in my 30 watt RGB laser projectors. Is EMS 8000 or EMS 9000 good for animations or is there a better ones. Thanks Rupesh
    2 replies | 351 view(s)
  • Coogoolian's Avatar
    03-16-2024, 11:17
    So..... Intense Pulsed Light cosmetic laser cosmetic systems use diode bar stack arrays of (almost always) 808 nm "off the shelf" wavelengths (presumably a side-channel that the industry uses to offload their specialized Mil Spec, high energy physics lab gear, and industrial thin disk laser pump...
    1 replies | 288 view(s)
  • Loreadarkshade's Avatar
    03-12-2024, 05:30
    Loreadarkshade started a thread NUBM0G in Buy/Sell/Trade
    NUBM0G Decanned hitting over 8 watts. This little monster can output a gorgeous 473nm at around 6.2-6.5A and even richer cyan when pushed a bit harder. Measurements taken with DTR 25mm Copper module, G2 lens, Sanwu LPM-20T, 21°C TEC cryo-block Available on my store:...
    1 replies | 338 view(s)
  • atomd's Avatar
    03-24-2024, 08:07
    In this multi post series, I'll describe step by step series how I built by ECDL setup. Let's start with physical construction. Design In this build, I'll use diffraction grating to reduce the bandwidth. The grating will be operating in Littrov configuration. In this case, it's ...
    1 replies | 159 view(s)
  • Loreadarkshade's Avatar
    03-12-2024, 05:41
    Loreadarkshade started a thread NUBM0F in The Lounge
    This diode hit 10.6W when run at 6.2A, cooled to -0.7°C using a TEC module! 🙀 Yup, you read that right. Measured on a Sanwu LPM-20T, using G2 lens at 20cm distance, pressed in a 25mm DTR copper module. Link to test datasheet:...
    0 replies | 225 view(s)
  • Laser57's Avatar
    03-18-2024, 23:26
    Anyone know a source for a high voltage capacitor suitable for a "SSY-1" ND:YAG laser for sale anywhere? I want to charge the cap to 500 VDC but it needs to be able to handle rapid 5 to 10 Hz charge and discharge firing. No, not one YAG, I have a dozen of them I want to fire one at a time...
    0 replies | 185 view(s)
  • Laser57's Avatar
    03-21-2024, 22:53
    I recently purchased a used Avantes AvaSpec-2048 spectrometer, it's consistently reading a bit more than 1.2 nm high, the HG-1 calibrator allows me to see that and mentally subtract the error from the measurement, but I'd like to have the instrument reading correctly. If anyone has...
    0 replies | 143 view(s)
  • laserist's Avatar
    Today, 03:57
    There's something wrong with the relative gain. In my memory the PDM offset was maybe 4x greater. I don't think I played it with colormod, maybe chopper. There will always be 2 retraces, but they will be close together if the PDM frequency is close to the fixed cycloid major frequency.
    54 replies | 14705 view(s)
  • ronhip's Avatar
    Yesterday, 22:18
    If my memory serves me (it rarely does...), this number was highly color-moded with CM1 to the point where you only saw 1 or 2 small spectra, and the spiral PDM rate was adjusted so there was only one "string" connecting the two PDM'd shapes. It was a hard-to-adjust number, but the audience (and...
    54 replies | 14705 view(s)
  • Greg's Avatar
    Yesterday, 21:38
    Here's some not particularly exciting results showing a brief clip from summer madness with FCXY equivalent cycloid, joystick rotation, and PDM depth. Is this what the PDM effect on the FXCY is supposed to look like? video clip: https://youtu.be/SJwuSkTwnWo
    54 replies | 14705 view(s)
  • Kevint's Avatar
    Yesterday, 20:39
    Woo-hoo! AD633s
    166 replies | 157343 view(s)
  • lasermaster1977's Avatar
    Yesterday, 08:48
    There is one here: https://www.ebay.com/itm/143446907675
    166 replies | 157343 view(s)
  • absolom7691's Avatar
    Yesterday, 07:59
    Talk about a thread rez! Seriously though, thanks for the info! I will say, LEDs can match color temp and a few other attributes of incandescent but the instant on/off of LED seems harsh to me. I know, I know, a capacitor will help but LEDs still can't emulate the color temp change of a...
    12 replies | 22076 view(s)
  • casyoo's Avatar
    Yesterday, 00:55
    The incandescent bulbs that Disney used in the trees are the 258 type. They are a G4.5 14volt flasher bulb in E10 base. The twinkling effect is the same as the flashing c7 bulbs, but since they are low voltage, they flash slower. I have heard that they had replaced these recently with LED, but I...
    12 replies | 22076 view(s)
  • dchammonds's Avatar
    03-26-2024, 21:17
    I remember borrowing that book long ago- would love to have a copy now.
    166 replies | 157343 view(s)
  • Kevint's Avatar
    03-26-2024, 12:45
    Laserist: LOL! Thanks for sharing the story. I pray mine doesn't do that. But knowing me, it a possibility. I have been known to reverse voltage polarity and short things out every once in a while. Lasermaster1977: that looks like a great build design and all the parts are available. ...
    166 replies | 157343 view(s)
  • DZ's Avatar
    03-26-2024, 12:02
    I have different timing caps on the pair of LFO's that I use in my console. LFO1 runs from about .5Hz to around 100Hz and LFO2 runs from about 2Hz to around 250Hz (IIRC). I also use the LFO's to drive frequency modulation, which can get interesting from time to time! I shot a quick video of using...
    166 replies | 157343 view(s)
  • lasermaster1977's Avatar
    03-26-2024, 11:56
    Kevint, a very useful multi-function waveform generator is the XR2206. Useful for Sine, Triangle, Square, Ramp waveform generator. ...
    166 replies | 157343 view(s)
  • laserist's Avatar
    03-26-2024, 11:10
    I think you're safe... Ivan told a story about the early days of Laserium where they used a couple of old army surplus signal generators to do Danube's lissijous figures. There was a rumor before a show that Patty Hurst had been seen in the park. So when a capacitor in one of the signal...
    166 replies | 157343 view(s)
  • Kevint's Avatar
    03-26-2024, 10:57
    DZ: Thanks for the offer. What's the frequency range of the envelope generator of the AM? Can it go down to 0.1Hz for a very slow ramp?
    166 replies | 157343 view(s)
  • DZ's Avatar
    03-26-2024, 10:05
    Not sure if you'd be interested but I have a couple unpopulated boards that would handle AM quite well. The first has a pair of LFO's that outputs triangle and square. With a symmetry pot the square wave goes from 1% to 99% duty and the triangle goes from leading edge to falling edge ramp. The...
    166 replies | 157343 view(s)
  • Kevint's Avatar
    03-26-2024, 09:40
    Laserist: truly hoping I'm not in the second category. I bought a signal generator :). Never owned one before. I'm thinking I can play around with different wave forms as the AM signal for the AD633s.
    166 replies | 157343 view(s)
  • Kevint's Avatar
    03-26-2024, 08:03
    Thanks Greg. For this effect I think I'm looking for some type of adjustable sawtooth wave to drive the AM (I'm guessing 0.1Hz to 2Hz range). There's a Laserium video where the image grows from nothing to a given size and either disappears or holds. I see that there is blanking going on but I...
    166 replies | 157343 view(s)
  • laserist's Avatar
    03-26-2024, 07:55
    ...when and to whom information from the archive is bestowed. I'll take a guess: The when is simply when someone is ready to use it. The whom is someone who isn't an asshole.
    166 replies | 157343 view(s)
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