405nm AR glass lenses - fit AixiZ  FEELER

Very nice!!! I knew that 200mw was more than possible ahahaha

What current were you running through the diode, 160 ish?


brtaman

brtaman said:

Very nice!!! I knew that 200mw was more than possible ahahaha
What current were you running through the diode, 160 ish?
brtaman

Click to expand...

I guess I'm going to have to figure out how to fit it into a Merideth module, eh?

Peace,
dave

Re: 405nm AR glass lenses - fit AixiZ  FEELER

wow. this is awesome. didnt think it would be that great of a difference!!!

daguin said:

[quote author=brtaman link=1212842385/144#144 date=1215895168]Very nice!!! I knew that 200mw was more than possible ahahaha
What current were you running through the diode, 160 ish?
brtaman

Click to expand...

I guess I'm going to have to figure out how to fit it into a Merideth module, eh?

Peace,
dave[/quote]

Hehe guess so, you don't use aixiz style modules though?

This is gonna be great, plus it will enable the use of more current due to less reflection, not really sure about the dynamics, but it makes sense. This lens should be amazing with a 6x diode though, what are they putting out the moment? Might have to start setting some money aside for one.

brtaman

brtaman said:

Hehe guess so, you don't use aixiz style modules though?

Click to expand...

I use whatever I need to or is best. For example, all of my "matched set" lasers have the AixiZ module. I needed the length (for the Rkcstr driver) and the back "plate" to make the heads "modular."
http://www.laserpointerforums.com/forums/YaBB.pl?num=1215317897

What I was referring to here was that my personal blu-ray laser is putting out 180mW (@190mA - flexdrive) with the Merideth glass lens. It would be nice to just replace the Merideth glass in the module with an IgorT glass.

Peace,
dave

Re: 405nm AR glass lenses - fit AixiZ  FEELER

Well.. I still have many more tests to do. And that is just with these! I kinda don't see a visual difference between the 405nm AR coating and the ML coating.. Hmm.

I need to test them on a red. If the power is the same with both lenses, then all are ML.. If so, well. Then i would be a bit angry, to say the least.... On a red, the ML should bring a 18-20% increase, and the 405nm should only do like 11-13%.. If both do the same....


Also, i need to compare the results with the aspherics from the other manufacturer.. There are some distortions present here, that manifest themselves as "wings". At first i thought that the lens is dirty..
I heard the Meredith has something similar, but i have not yet even made a Meredith based blu ray.. Need to compare the results!

I have some ideas that i need to try. But if they don't work, the custom lens might have to be an aspheric..
I hope it doesn't come to that tho.


So, there is a lot of work ahead of me now.



Oh, and Dave.. I figured out why my freaks kept dying! One of them was actually doing 228mW before optics! Add reflections to that, and you have a week of fun and then a dead diode.. The weaker the diode, the longer it survives a certain current. And the lack of reflections here will help too! More info in the batch testing thread...


Needless to say, with the known transmittance, i can now finally figure out what the MAX optical flux is, that these diodes can take.. And no more worries about x% reflections.. At this point, x is <0.5%..

I will have a permanent 200mW beam piercing the air in my workshop tomorrow.

IgorT said:

Well.. I still have many more tests to do.
I will have a permanent 200mW beam piercing the air in my workshop tomorrow.

Click to expand...

BRAVO!

Peace,
dave

Re: 405nm AR glass lenses - fit AixiZ  FEELER

I.... need..... one..... badly.....

Re: 405nm AR glass lenses - fit AixiZ  FEELER

Oh, that diode was running at "only" 169mA! And doing 167mW.. That was the third best diode out of 23! I had some that were doing way more at the same current! But they didn't make it a week - the more optical power, the sooner they die.


I was changing the lenses on the third freak back and forth, to repeat the measurements, and calculate an average. I let it cool down several times in between. After the fifth time, when i force cooled it down (in my peltier mini fridge, stupid me), and put a plastic lens in, it died at power up.. I should not have cooled it down. A cool diode puts out more power and then the reflections....


So i need to make another one now..... This one was doing around 210mW before optics, with an unknown amout of reflections from the plastic lens.. I'm sure it would have lived a bit longer, had it not been running on plastics for two weeks..


I am kinda hoping, that they can survive 200mW of output power. That would make nice 190mW blu rays! If they can survive 210, we would be at 200! It depends on the diodes now.. (6x diodes will achieve 240mW now, if they are at 200 after plastics!)


But even if it was "only" 180mW for the PHRs, it would still be good to have them last longer than a week!


P.S. Dave, i thought your 190mA diode died? Did you replace it with another one?

Re: 405nm AR glass lenses - fit AixiZ  FEELER

GooeyGus said:

I.... need..... one..... badly.....  

Click to expand...

Haha.. Well, your 6x is doing 200mW now, right?
Can't wait to get mine!


BTW, i need to test on the 6x separatelly. If the wavelength is just a little bit lower, the power difference could be higher.

Re: 405nm AR glass lenses - fit AixiZ  FEELER

TheGr8Revealing said:

wow. this is awesome. didnt think it would be that great of a difference!!!

Click to expand...

What did you expect? After i learned the Meredith really does 13% on top, i did a lot of thinking, and i set my expectations to 18-23%..

That's because i knew the Meredith does ~20% on top of plastic with reds. So there is no reason it would not be the same here.. In fact, it could be a bit more (plastics and UV)..

BUT!

Lenses have a shorter FL for 405nm, than for 650nm.. This means the lens sits closer to the diode for a parallel beam. And this means it's NA (numerical apperture) is higher than it is for reds - the same lens collects more light from a 405nm diode, than from a 650nm diode.


So even tho plastic has lower transmittance for near UV light, because it is closer, interestingly enough the end result is the same.

And a proper glass lens will then increase this by ~20%...

IgorT said:

P.S. Dave, i thought your 190mA diode died? Did you replace it with another one?

Click to expand...

I had three going at 190mA. The one that died was going into one of the "Matched Sets" (the one with the 250mW red burner). I put the other 190mA blu-ray in that pair (170mW blu-ray after AixiZ acrylic and 250mW red after Aixiz glass). It survived the testing/burn-in week and gets burned for about 2 minutes every night. Originally, I was going to sell it separately, but the other one dying required a switch in intentions.

Not all diodes survive the "hell week" I put them through before I'm willing to sell them.

The other is my "personal" blu-ray. It is also being driven at 190mA (flexdrive). It is giving me 180mW after Merideth glass. It gets burned almost every night outside.

Peace,
dave

Re: 405nm AR glass lenses - fit AixiZ  FEELER

Well, my third freak survived two weeks of torture.. The second week, at nights i had it on for like 20 minutes at a time. So one week is no guarantee yet.. With a red, i would say it's good if it survives the first few powerups.. Here, they can just start degrading after a while.

I'm out of freaks.. And i actually don't have a blu ray of my own at this moment  :'(
Every few minutes i still grab at it, to turn it on and enjoy the beam. Only after pressing the switch do i remember it is dead..  ;D


Poor diode.. I had no idea what i was doing to them! My meter was showing too little.. I think you compared meters with Glenn, right? Well, in that case, all my lasers would measure 7% higher on yours.. If you look at the batch testing thread, you will see why the freaks all died.

Re: 405nm AR glass lenses - fit AixiZ  FEELER

I just put together a 167mw bluray in a kryton and if your tests are conclusive I'd like to get me a few of those lenses.  I am pretty sure I could push this one but my test batteries are a set of 18650's wired in series as apposed to what's in my kryton is a pair of rechargable cr123's.  With the extra omph going into the groove driver I'm not sure if thats changing my current going to the diode or not so I'm kind of unsure what the current is running at on this doggone thing.  I really need to get me a dual cr123 battery holder.

Another thing I've noticed about these doggone diodes is it's really easy to push the window loose. I got fingerprints on the window so I had to clean it off, and while cleaning it I pushed the window down about 1/16th of an inch. Kinda scary. I've busted 4 windows loose in extraction and am going to have to send them to gooey for can removal.

Definately interested in at least 50 405nm glass collimator lenses. :-?