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Old 05-25-2008, 11:27 AM #113
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Default Re: FS: >70mW Blu-Rays, two models... Any interest

Blue owes you money?


Anyway, i have lots of stuff coming in this week, so i'll be able to finish everything up soon. I will know the specific powers of each of your lasers before the end of the week.

I also ordered the special 405nm AR coated lenses for testing.. I really hope they work! This is going to be one very special laser...


The second list of 6 is filling up fast. If anyone else is interested, better let me know soon. Interest is non obligatory, but reserves a position on the list.

I should soon be getting the diodes at only a slightly higher price than everyone else (instead of triple), so i will be able to keep the same price of $185.

The 405nm AR coated glass lens should not cost more than $25 (as an upgrade for the laser), but will make the laser more powerful without pushing the diode to unsafe currents. With it, powers of 100mW should be possible to reach safely! By raising the current a bit, who knows, maybe 110mW maybe more.. More info once i test them.


Ok, now i need to go back to my real work. I got everything but one piece of material. Now i need to improvise....



EDIT: Updated post 1 specs and descriptions with some new findings.


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Old 05-25-2008, 05:14 PM #114
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Default Re: FS: >70mW Blu-Rays, two models: $185

Daedal: I'm soon going to need to know what current you want me to set yours to. I wrote 100mA on the list, but it was just a guess.

I can also throw in other resistor values, so you can change it later... If you have a microscope, that is.
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Old 05-25-2008, 05:21 PM #115
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Default Re: FS: >70mW Blu-Rays, two models... Any interest

Quote:
Originally Posted by IgorT
BTW, if anyone is interested:

Since i want to use the money from these lasers mostly on buying more diodes (for backup and potential repairs), i would be willing to trade a laser against a suitable number of diodes, partially harvested in their heatsinks...

But they have to be harvested in a way that makes sure they are not dead:
- solder the legs together above the PCB on the underside
- break the white glue (don't drop it!)
- cut the cable
- put some tape over the window
- safely package in a baggie


If someone is willing to trade, just let me know.

I'll go for a trade. I like good trades more than sales and I've been looking for a better quality blu-ray pointer (for less than $300). This fits both requirements.

SCHWEEET! 8-)

PM sent.

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Old 05-26-2008, 08:46 AM #116
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Default Re: FS: >70mW Blu-Rays, two models: $185

Deal! Looks like i'll have more than enough diodes soon.
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Old 05-26-2008, 10:41 AM #117
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Default Re: FS: >70mW Blu-Rays, two models: $185

yep he sure does. it you can safely(diode life 5000+) push to 100 with the special lense i will take it
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Old 05-26-2008, 01:23 PM #118
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Default Re: FS: >70mW Blu-Rays, two models: $185

Well, the special lenses are not here yet. They would be an upgrade. I ordered them, but won't know their specific effect on power untill i test them.

For now, i'll just pick out the most powerful diodes, and set them at a current under 100mA, so they put out 80mW+ after a clear acrylic lens. The special lens would then boost this power because it's glass AND 405nm AR coated. Glass would seem to be better than plastic for 405nm, but the 650nm AR coating decreases the power. A lens, that is both glass and 405nm AR coated would work the best for Blu Rays.

After testing i will be able to tell everyone what power the upgrade would give them. I will make a list of all your no-lens powers, so i will be able to calculate the power boost for each of you separately.


Otherwise, i have no idea about the diode life expectancy.. We don't have a datasheet available, so i am working with the info we have gathered on this forum. But if one should ever die, i will have replacements available and they will cost less than i originally thought. Also, you would only have to send me the module, not the entire laser, which would make things easier in case something goes wrong..


I am working on a way to include a jumper on the driver board, which you could solder shut to give you a higher current. This way, if we discover they can do more one day, you could just set it to a higher current and get even more out of it, especially after the special lens.
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Old 05-26-2008, 02:30 PM #119
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Default Re: FS: >70mW Blu-Rays, two models: $185

Otherwise i will do >100mW as well. But that will be a special order item and it'll cost a bit more and take a bit longer i'm afraid.

Even with the special lens, not every diode will be able to do it with a current of 100mA or less. And if i can only do it with one diode out of five (just a guess for now), it'll have to cost a bit more... I will also have to go through many diodes till i find the most suitable one, which is why it won't be a standard laser and will take some time.


The other option is pushing the current of course. In that case any laser can be >100mW, but it's at your own risk.
If i want to give a warranty i have to select the diodes carefully and sort them into power categories. It's the only way to minimize the risk of diode failure.

Not only will you get a better laser this way, selecting only the best diodes for the lasers protects me as well, as there won't be many broken ones, if any at all...



But with a diode putting out >80mW after an acrylic lens, you should be able to get close to 100mW with the special lens. Could even be more, but i can't tell for sure. A good diode at 100mA puts out 110-120mW before optics. So it only depends on how much light the lens blocks.
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Old 05-26-2008, 04:10 PM #120
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Default Re: FS: >70mW Blu-Rays, two models: $185

Quote:
Originally Posted by IgorT
Well, the special lenses are not here yet. They would be an upgrade. I ordered them, but won't know their specific effect on power untill i test them.

I am working on a way to include a jumper on the driver board, which you could solder shut to give you a higher current. This way, if we discover they can do more one day, you could just set it to a higher current and get even more out of it, especially after the special lens.
You, Sir, are a tease :P

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Old 05-26-2008, 04:39 PM #121
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Default Re: FS: >70mW Blu-Rays, two models: $185

;D

Actually, i just want to make you all happy...
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Old 05-26-2008, 09:58 PM #122
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Default Re: FS: >70mW Blu-Rays, two models: $185

Ok, if i set the current to 98.5mA, the two jumpers would allow to raise it to 104mA, 114mA or 120mA if both were closed at the same time...
This will make for nice adjustability, if someone wants to use a higher current. I'm gonna calculate some more possibilities. See if i find better ones.

But 110mA would not be very usefull, since that is where the knee ends, and there is not much difference from 104mA (only heat). So i think the above options are just about perfect. Besides, a laser with a 405nm AR coated glass lens would most likely be >100mW at 104mA already. And 114mA would be ~100mW even after the acrylic lens, so just imagine what the special one will do!


I would suggest waiting for more info from experiments tho. I will be preforming several diode tests myself, once i have enough of them. Luckily, the diodes have become cheaper, so it would not cost me $60 to replace one anymore...


BTW: Tracking shows some last parts just arrived at the customs!
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Old 05-26-2008, 10:52 PM #123
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Default Re: FS: >70mW Blu-Rays, two models: $185

Since i have many backup diodes arriving, i decided to do a quick test on my prototype laser.

I just set my test Blu Ray to 109mA and got 87mW after a clear acrylic lens! Remember, this one would seem to be a little weaker. The ones i will select for your lasers will be able to do the same power at under 100mA... But the higher current will give me an idea what to expect when pushing them a little.


Looking good so far! And much brighter! I got a boost of 15mW! 8-)
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Old 05-27-2008, 12:04 AM #124
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Default Re: FS: >70mW Blu-Rays, two models: $185

those are very nice!!

the little one rocks.

do you have more pics of it?
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Old 05-27-2008, 08:46 AM #125
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Default Re: FS: >70mW Blu-Rays, two models: $185

Yeah, i love the way the little one looks. I just hope i'm gonna get to keep a couple..

I'm gonna make some more pics, and post them. I was way too busy last week, and it's still not over (had to move the deadline at work)..


BTW: I dreamed my test laser died at 109mA... I was very sad.... Luckily it was just a dream. Stilll going strong at 87mW! And i never lost a laser after it was built... Maybe i'm being too careful with the currents?

I really wanted to push the current while it was still dark. But now, when it's very bright outside, the beam is WAY more defined in the air, with a little smoke.. There is a BIG difference between 72mW and 87mW! And i think it's worth the extra current....
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Old 05-27-2008, 10:04 AM #126
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Default Re: FS: >70mW Blu-Rays, two models: $185

Ok, lens update:


The lenses i wanted to order are too small. I will have to have them custom made.
Luckily, this means they will be even better. They can make any diameter and focal length, and it would be a SINGLE element glass lens with 405nm AR coating.


But i would need to take more of them at once. So i need to know how many would be interested in these upgrades. Just interested. I will still test them and report the findings before selling them... I would only sell them on, if the power increase is worth it.. Otherwise, i'll take them at my own risk.


The price would be between $21 and $25... So possibly less than i thought.
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Old 05-27-2008, 10:14 AM #127
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Default Re: FS: >70mW Blu-Rays, two models: $185

get a slighty shorter focal length than the aixiz, and with the same diameter and threads if you can
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Old 05-27-2008, 10:58 AM #128
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Default Re: FS: >70mW Blu-Rays, two models: $185

It won't have the nut.. It'll be just the lens. I'm trying to get a lens, that would fit into the AixiZ nut..

A shorter focal length would be good, but it would mean the nut would go into the module even deeper, and then the metal focusing ring wouldn't fit...

The glass lens wouldn't have the front rim, like the acrylic, it also wouldn't have the back ring, which means the spring would touch it (unless i put something in between) but more light would be captured by it..


Might be best, if i installed them in the nuts... But where can i get just the plastic nuts with the acrylic lens?
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