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Old 05-27-2008, 09:11 PM #145
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Default Re: FS: >80mW Blu-Rays, two models: $185

And a picture of what power to expect from an >80mW laser...

Sorry about the quality of the pic. My meter doesn't have background ilumination for the display. The lasers usually blind the camera.
I had to enhance the display a bit, to make it more visible. It's showing 83.1mW... I'll try to enhance it a bit more... Fixed.. I hope it's legible now.


Anyway, this is with a laser at a safe current, and with an acrylic lens. The glass lenses will let through MUCH more light, so this very same laser could reach 100mW or more. At a slightly higher current, the laser would be >100mW much more safelly, than by overdriving it. And if even higher currents should still turn out to be safe, the powers could jump to 115-120mW! You would just need to close a jumper...

I can't wait to get the lenses, so i can give exact values.
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Old 05-27-2008, 09:15 PM #146
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Default Re: FS: >80mW Blu-Rays, two models: $185

And last but not least, two beam shots for your enjoyment...

There is very little smoke in this picture. The above beam is 87mW and the other is 83mW. The difference is not noticeable (even if the pic may suggest so - it's just the angle). But the difference from 72mW is very profound! All of the lasers will be at least 80mW, more after we get the special lenses or if you tweak the current...
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Old 05-27-2008, 09:47 PM #147
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Default Re: FS: >80mW Blu-Rays, two models: $185

Nice pics, the meter is pretty hard to read, but it looks like I can see 83 mW ! Makes me pretty Anxious! I have to get one and take some pics of my own.
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Old 05-27-2008, 10:38 PM #148
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Default Re: FS: >80mW Blu-Rays, two models: $185

Quote:
Originally Posted by scopeguy20
Nice pics, the meter is pretty hard to read, but it looks like I can see 83 mW ! Makes me pretty Anxious! I have to get one and take some pics of my own.
Yeah, sorry about that.. I really need to put an EL foil into my LCD.. The problem is, the high frequency noise might make the meter go crazy..

But i have to be able to make pics as well.. I can see it just fine, but the camera cant.. I hope it's legible now. I had to fix each number separately. :



Anyway, i'm still amazed at how much heat i can feel on my skin from an uncollimated beam!
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Old 05-28-2008, 02:34 AM #149
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Default Re: FS: >80mW Blu-Rays, two models: $185

Hey. First time poster here. I'd like to know if the weaker lasers are spoken for. I'd shoot you a PM, but there's a minimum number of posts required before I could. Could you PM me the details (I'm not sure if I can receive but might as well try) on them (price, options, etc.)? Thanks a ton!
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Old 05-28-2008, 06:40 AM #150
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Default Re: FS: >80mW Blu-Rays, two models: $185

Igor please hurry up my clothes are covered in drool stains lol
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Old 05-28-2008, 07:09 AM #151
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Default Re: FS: >80mW Blu-Rays, two models: $185

Quote:
Originally Posted by will
Hey. First time poster here. I'd like to know if the weaker lasers are spoken for.
Actually, no.. None of the "weaker" lasers are spoken for yet. I don't know the ratio of the "weaker" to "stronger" diodes yet anyway.. Once i do, i will post it, and people can take them if they want..



But just to make one thing clear.. When i say weaker, i mean those diodes, that put out a little less power at the same current..
My weaker laser is currently running at 87mW (109mA) and my stronger laser is currently running at 83mW (92mA).
So the weaker one is actually stronger at the moment.. But it takes more current to do this. If i set it to just under 100mA, it will be doing 72-74mW again.

This means, the "weaker" ones can be just as powerful or more, than the "stronger" ones... But if both are pushed to the max, they will be a tiny bit weaker..


I might turn out to be way to careful with these. We could soon discover, that higher currents are safe in the long run as well. In that case you will be able to just select the safe higher current in your laser and get more power, but for now, i will try to achieve the higher power with better optics.

But this way, if we later set them to higher currents, they will be the most powerful Blu Rays around..
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Old 05-28-2008, 07:13 AM #152
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Default Re: FS: >80mW Blu-Rays, two models: $185

dibs a stronger diode
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Old 05-28-2008, 07:17 AM #153
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Default Re: FS: >80mW Blu-Rays, two models: $185

Quote:
Originally Posted by cybob101
dibs a stronger diode
The >80mW lasers ARE the ones, that do the higher power at the same current, and will reach even more with proper optics and/or raising the current.. As i said, i will pick the "weaker" diodes out, and offer them as >70mW models. But both can do MUCH more..

An >80mW laser can easily be set to >100mW WITHOUT the special lens. With it, we can expect to see >115mW.. I dare not guess higher yet, but...
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Old 05-28-2008, 10:11 AM #154
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Default Re: FS: >80mW Blu-Rays, two models: $185

i care more about long life so pref as high as possible but ma under 100
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Old 05-28-2008, 10:21 AM #155
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Default Re: FS: >80mW Blu-Rays, two models: $185

Well, of course.. I'm going to use safe currents for these and boost the power with lenses first.
This will allow us to reach powers of ~100mW without giving up on the warranty!


I'm just saying, that if we one day realize, that these can easily take 120mA and still live a long and happy life, you will be able to select that current, and because of the lens it will be the most powerful Blu Ray..


I still remember, when people told me i should lower the current in my 16x DVD diode to 150mA.. But it's still working great at 270.. These may also be capable of taking more than we realize. I'm just being careful for now. I will experiment with my lasers, not yours.

Once i know more, i will be able to tell you how far you can raise the current exactly, and still be safe..
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Old 05-28-2008, 11:10 AM #156
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Default Re: FS: >80mW Blu-Rays, two models: $185

Hi,

Just like Will i am new to the forum so hi!
I am very interested i buying a blu-ray from you but i can't read the conditions of the warranty anywhere.
I would also like to know if the pices have changed since the first batch (185 with the acrylic)
I understand it would be 20-25$ more expensive with the glass lens . . .?
Thanks Tim
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Old 05-28-2008, 12:05 PM #157
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Default Re: FS: >80mW Blu-Rays, two models: $185

The conditions of the warranty are not specified anywhere, which is why you didn't find them.. I think 3 months would be good. During this time, i would replace the diode for free, if it died through no fault of the buyer (just don't drop it or poke the diode).. After that, diode replacement would be $30.. The electronics are covered by a one year warranty. But i have yet to lose a laser AFTER it was built. It can eventually happen, especially when more are made. But if a diode doesn't die of sudden infant death syndrome, it usually lives a long life.


The thing is, we don't yet know what these are capable of. That is why i am being so careful with the currents. I want to run them under the knee in the graph. This is also why i will sort them into power categories. The ones that will only do 70mW at these currents will not be pushed above the knee, to reach the same power. They will be sold as 70mW with a discount.

Instead of pushing the currents, i will boost the power with the special glass lenses. If you read the thread, then you know the effect of plastic and AR coatings for wrong wavelengths on 405nm light. Glass AND 405nm AR coating will work amazing in these.


The price of the laser has not changed yet. I do not know the price of the glass lens exactly tho. The one i wanted to buy was $25, but it is too small, so i will have them custom made. Once the specs are confirmed, the lenses will be done in two weeks, and sent to me, after that, i will forward them to the buyers, and they can just put them in their lasers...


The special lenses should cost under $30. The price is still a variable tho. I am thinking of having them coated for multiple wavelengths. This way, we would have the perfect lens for all laser wavelengths. Multilayer coatings cost slightly over 2 Euro more. But in the end, the multilayer coated lenses could actually be cheaper, just because more people would want one for their lasers.. After i test them and figure out the power boost, everyone will be able to get them for the same price they cost me and i'll be able to tell you exactly what power it will give you.


At the moment, the only glass alternative is a Meredith lens (or a ~$100 ThorLabs lens). The Meredith requires a special Meredith module and can't focus as well as acrylics. The beam is thinner, but has a higher divergence.

The glass lenses i am talking about would be somewhere in the middle, so they would still allow focusing into a tight spot (burning stuff is important to some people), but the beam would be a little thinner than with an acrylic, which is good.

This could just end up being the best laser lens, and at a lower price than a Meredith with it's special module and adapter...




P.S. If you click on my name, you can find a link to my email address. I see you can't PM yet.
The first batch is all spoken for, and the second one is filling up fast.
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Old 05-28-2008, 01:30 PM #158
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Default Re: FS: >80mW Blu-Rays, two models: $185

The email is on it's way.
Thanks for the quick and long answer!
After reading quite a lot about these thing I am still curious about how much IR they emit.
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Old 05-28-2008, 01:42 PM #159
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Default Re: FS: >80mW Blu-Rays, two models: $185

They don't emit any IR at all, since it is only a diode operating at 405nm. Only DPSS lasers (mostly green and blue ones) and IR diodes themselves emit IR. So don't worry about that! You should be more worried about getting cancer, since 405nm is very close to the UV part of the spectrum. ;D Nah, just a joke, the wavelength is not short enough to cause cancer.
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Old 05-28-2008, 02:15 PM #160
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Default Re: FS: >80mW Blu-Rays, two models: $185

;D cancer, yeah...


Like lazerguy said, only lasers, that USE an IR laser diode can emit IR. Diodes only emit one wavelength.
But green lasers use an IR diode to pump crystals, which then convert the wavelength into 532nm in two steps. Some IR is then left over, which is why IR filters are a good idea there. There are also blue DPSS lasers which need filters even more, because they use higher power IR pumps due to lower crystal efficiency.

But a diode laser CAN NOT emit IR unless it uses an IR diode.


What you should be worried about is getting the violet beam (or unexpected reflection) into your eye. Luckily, these are so close to UV, that yellow glasses or sunglasses block them.

I made a measurement through some sunglasses, that are not even dark, and while i saw a faint dot, i couldn't measure it's power.. It was under 1mW.
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