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FrozenGate by Avery

574nm 36 mW Yellow Laser

This weekend I'm hooking up the yellow to an actual analog driver and will see how it modulates. I do not use PWM for anything at all other than motor speed control. I'm sure it works fine but I prefer analog for laser graphics.

I'm hoping I can add the yellow in through pangolin for a four line projector and use it for all the white and gray colors when mixed with blue. We shall see :)

Of topic but how do you like the usb2000 spec compared to the B&W units? Worth the cost verses these units? I just want it to check diode lasers.
 





kecked said:
This weekend I'm hooking up the yellow to an actual analog driver and will see how it modulates. I do not use PWM for anything at all other than motor speed control. I'm sure it works fine but I prefer analog for laser graphics.

I'm hoping I can add the yellow in through pangolin for a four line projector and use it for all the white and gray colors when mixed with blue. We shall see :)
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Keep us posted! :beer:

paul1598419 said:
Ah. Yes, this driver does have TTL input that can be PWM modulated for what appears like analog modulation. If used in a projector, the PWM frequency needs to be pretty high. I have built a RGB PWM controller for TTL inputs that works very well. It is only running at 2.4 kHz, though. Not high enough for a projector.
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Was talking about an oscilloscope when I said put it on a scope. :beer: Just to see how the input modulation signal corresponds to the actual output. DPSS often has problems with modulation linearity.

Definitely wouldn't go near PWM for a projector if you want full colour... Going to end up not looking the way you'd want.
 
My USB2000 was my first spectrometer. It has a much wider bandwidth than the B&W TEK ones do. Yet, it has a resolution of 0.2nm, so I have been loving it for about three years now. The B&W ones are okay, but are limited by the grating and some appear to be misaligned causing astigmatism in the light falling on the CCD.

@diachi.

I have used my PWM controller on 532nm lasers and it works well with the ones I have tried. I'm sure analog would be the preferred method of modulating colors for a projector. But, sometimes, this is not possible for one reason or another.
 
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affordable yellow~ how nice. It's growing ever closer. Neat little laser. Reminds me I still need to review my yellow Genesis. Maybe i'll get around to that later.
 
I have been hoping you would get around to that soon, Matt. That 3 watt OPSL 577nm laser needs to be shared. At least in photos. :D
 
Yeah, the problem is that like yours, it always comes out green in pictures lol. That and I wanna do it justice. I've just not had the time to type up the whole thing, as it'll end up likely pretty long and huge. I used to type those long ass things at work, and I can't do that anymore. It's hard to find time to make those nice long detailed posts anymore.
 
Asking questions about modulation is a good question. But it hasn't been revealed how these yellow lasers work. Aren't we getting ahead of ourselves?
 
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paul1598419 said:
I'm still waiting for Steve to use the test equipment available to him to find the answer to this one. I am through with rank speculation as it went nowhere. I can't measure the IR on this one as my spectrometer doesn't go that high into IR.

BTW, congrats to Hakzaw1 for getting two of these lasers sent to him. I am also glad Alex is trying to get a new laser. It is tough being in this hobby with few to no lasers. Good for you, Alex.
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THANX Paul for the link--

BTW the email addy is NOT the POOPAL addy-- you need to get the right AND send your phone number DHL express will NOT ship if no fone##.

AixiZ Laser USED to sell DPSS Yellow lab lasers--they were failing at an alarming rate and AixiZ had to stop offering these as the profit (even at a VERY HIGH PRICE) was lost after replacing free just the first one.. IIRC these were $400 and not very high power. maybe 80 mW--just a guess--I will ask Chuck next time I go there.. he might even have a returned one someplace--opening one up would be great--they had about the same experience with the 473 DPSS also pricey..he gave me 4 of those..:whistle:
 
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ultimatekaiser said:
Yeah, the problem is that like yours, it always comes out green in pictures lol. That and I wanna do it justice. I've just not had the time to type up the whole thing, as it'll end up likely pretty long and huge. I used to type those long ass things at work, and I can't do that anymore. It's hard to find time to make those nice long detailed posts anymore.
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I've seen yours on Skype and it does look green also. That is frustrating when you know how yellow it is and just can't get the camera to do it justice. Still, it is a very nice laser. BTW, when are you all going on vacation? Just curious. :eg:
 
Yeah, somehow. We also got cheap 488nm diodes this year too. Never would have thought we'd see all this stuff, yet alone in such a short time span
 
You bet it's for real! I have one and it is the best deal I've ever gotten on a truly yellow laser. If you are interested, you can email Freeman at: fb@optlaser.com. They are $30.00 each plus shipping.
 
Chicxulub, you just made me laugh but true.
Nice to see you posting. :beer:
If you said a couple of months ago that these would be available we’d be telling you to get out of dreamland. Just shows that we don’t know what’s around the corner.
 
I bought one, he's getting them out in quote "a new batch in 2 days".

You'll find that the optical semiconductor is 50% green and 25% red and blue, this is why it appears green to your camera.
The same trick is why green screens are used in theatre.

Edit, I'll take pictures with my google phone and hopefully it's high DxO rating let's me capture the right color.
 
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What kind of power supply will I need to run one of these? Just a couple 6V batteries or do I need a variable power supply? What kind of power supply are you guys all using for these?

What a time to be alive. 490nm diodes and cheap 575nm DPSS all in this short amount of time. Haven't been active here in a while, but this is getting me back into it.
 
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