Mitsubishi ML520G71...Red Holy Grail or Flashlight Fail ??

[CDBEAM]

Been following with interest and, I have a feeling y'all are going to eventually make me *really* upset I spent $3,200 on a Kvant 1.2 watt 640 not too long ago!

On the other hand........ GO! GO! GO!

I just could not resist !!!! ......And I realize that a certian company makes an outstanding product.....in a Great Country....but !!!

[steve-o]

LOL ^^ . You know it could be true ..

[andyf97]

I just could not resist !!!! ......And I realize that a certain company makes an outstanding product.....in a Great Country....but !!!

They could make them cheaper and better quality than any of us can, and they are buying diodes and optics in the tens of thousands.

I guess most people on PL do it mostly for own use, not to sell and compete with the big boys. Well that's why I do it. I paid enough out to producers over the years and now we can produce what we need for fractions of the cost. Thanks to help from PL members.

[edison]

Well if this is why you do it then i,m happy to wait for info about the exact specifications of the aspheric collimating lens you are using.

If you are a succesfull laser company there should be enough money to invest in good quality lasers. The problem is that most laserhobbyists don,t charge for shows and have to pay for their lasers from there normally payed jobs or there isn,t enough money left from the payed shows to invest in good quality lasers. Most hobbyist stay therefor hobbyists because they don,t have allot of experiance to sell their lasergigs commercially. A payed show with an RGB projector should at least be 500 euro. Want to have a good qualllity laser projector start doing payed 500 euro+ shows and then slowly invest in new equipment like complete build modules ready to drop in a projector and after that buy completely build projectors and build a relationship with the lasermanufacturer. It works both ways, if you can,t or won,t support the manufacturer why should the manufacturer drop the price and support you?
That,s my opinion at least.

The only reason to get cheaper red is most hobbyist don,t charge for shows or at least not enough. If they made enough money doing shows and had plenty of gigs they could afford a
ready build module

[kiyoukan]

from my findings and talking to company's and people who do shows, if you were to build your own projector after the first or second show you could have paid it off.
My only problem is if you had a unit die soon before a show to contact a company and have them mail you a replacement would take to long.
Were if you built it yourself you know how it works inside and out and better to fix.
Now this i think might only be true for those who wind up in a last minute jam vs a laser not living up to its expected hours and getting replaced.
Im my projector there will be a ready to go spare set of every laser.
all i have to do is pull out the old laser and slide in the new one rotate the markings till they match up and its good to go.
That way if any of my lasers die its less than a 10min job to replace and be back at full power.
The prices are now low enough for people like me to have systems more powerful than the slightly dated professional setups.
Not to mention these new diodes vs the old ones just seem to last a ton longer.
And now that they are more powerful so we need less diodes there are fewer points of failure.
I am very excited to get these lenses to correct my 635nm lasers right now with my setup the beam is great i cant wait to see what it will look like corrected.
CD beam pm your way

[andyf97]

On another subject, anyone have any comments on my video or the power readings?

For the smaller easy to construct lower power modules.

My recommendation For ~1.5watt 638nm red using 2xG71
1 set: Diode +mount+lens holder+ 2mm-3mm fl lens+DRlava kit / FLexmount normal with a little bounce mirror
1 set: Diode +mount+lens holder+ 2mm-3mm fl lens+DRlava kit / FLexmount Long foot with PBS to join the above
2 x Die4drives or 1x Flexmod or there are a few other options out there.
Running current per diode 1A
Voltage across the diodes 2.5v
And a good heatsink to maintain 25c in each diode, Die4chill will do this perfectly with a TEC, good to use a big base plate with a few TECs sandwiched bellow the diode mounts and base plates.
Optional (2x beam expander) for extream low divergence only one is required.

End result will be somewhere around 1.4W-1.5W 638nm depending on optics quality.

Still thinking on the best way to merge more diodes and when I get more time I will look at it. Now I wont be posting again this week as I have too much to do, today was a bit free.

Have a great week lads.

[steve-o]

...If they made enough money doing shows and had plenty of gigs they could afford a
ready build module

If they made enough money building modules they could afford to do lots of shows and have plenty of gigs
I believe that this was an experiment of what is possible with enough minds at work proving the genious of pure will. There were many doubting thomases along the way shouting "it can't be done!" We proved them wrong, I'm happy to say ;]

[CDBEAM]

YIKES !!!! " The Genious of Pure Will " Well...YES !!!......I think the Cod Fish Pic is Genious !!!! The rest is surly....mmmm ??? tenacity !!! And we are still not done....I want to see very long MTTF....I want 2 Watts !!!...I want it ALL !!!! I am currently working on TE for my test bed !!! B4 I overdrive....I want the abillity to keep things cool !!! Although....I must say....we have made very good progress.....we still need to continue our work and refinements....and support each other....NO...NO F'ing group hug !!! Just a thanx from me for your efforts !!

Andy....NICE videos !!! These things are like the 445's.....I will say that if we are going to overdrive....something I am not yet sure of....we will need to TE !!! Your finding that above 28C....things go South real quick is extremely interesting !!! How close was your temp probe to the actual LD ?????....I assume very close.....but even considering a close proximity.....the thermal lag time would come into play....and that would suggest that the LD had a major PO drop off....at something above 28C !!! Depends on LD contact to its mount, mount material and distance between the mount and the probe.

BEAM

[polishedball]

Well the test that started 7PM on Thursday night has now concluded. Running diode at 714ma, produced 619mw of power after all optics and distance. This is using a 405-g-2 lens and drlava c-lens. Over the past 74 hours the diode dropped 1mw so I'd say it did pretty well. No real signs of heat issues but the ambient temp was low 55~63 during the testing period. It was in the pretty much un-heated basement.

Wow, thats all I am saying to the rest of this other than it looks like a quad expensive build will be good for a paperweight. I do plan to know finish up the 12 banger 660 to mix with the newly found 1.5w of 640

YIKES !!!! " The Genious of Pure Will " Well...YES !!!......I think the Cod Fish Pic is Genious !!!! The rest is surly....mmmm ??? tenacity !!! And we are still not done....I want to see very long MTTF....I want 2 Watts !!!...I want it ALL !!!! I am currently working on TE for my test bed !!! B4 I overdrive....I want the abillity to keep things cool !!! Although....I must say....we have made very good progress.....we still need to continue our work and refinements....and support each other....NO...NO F'ing group hug !!! Just a thanx from me for your efforts !!

Andy....NICE videos !!! These things are like the 445's.....I will say that if we are going to overdrive....something I am not yet sure of....we will need to TE !!! Your finding that above 28C....things go South real quick is extremely interesting !!! How close was your temp probe to the actual LD ?????....I assume very close.....but even considering a close proximity.....the thermal lag time would come into play....and that would suggest that the LD had a major PO drop off....at something above 28C !!! Depends on LD contact to its mount, mount material and distance between the mount and the probe.

BEAM

[steve-o]

Thanks Polishedball for doing that test. Great to hear that it survived and didn't die. Overdriving at 1.5 times absolute max for 3 days sounds extremely promising!