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

[planters]

DTR,
What do you mean by a swing with temperature differences on the 445's? Power and wavelength seem to be only slightly affected by temperature differences to me.

[badger1666]

all i know these reds are very sensative to temp,mine start dropping power no sooner than switching them on, and have to tec cool them to 20deg c,to keep the power up

[steve-o]

Computer crashes... 2 dead PCs now at the house .. no contact with outside world. .. afraid I'd missed something .. whew ..

[polishedball]

Well here is my little contribution, beam can be improved yet, one diode is not centered on the lens. The beam shot is at about 25'

This is using the 405-g-2 lens, there is a 7% loss compared to using dave's Lens solution. I ate that in favor of having the beam height of 19mm. If anyone is looking for daves lens and mounts state side shoot me a pm would let them go for $50 a set have 2 Dave gets more than this plus shipping new.

Special thanks to CDBEAM for the C-lens holder made this a very easy build.

[CDBEAM]

..." Roll that beautiful BEAM footage "....What more can I say !!! Good job !!! We are getting closer !!! We just need some better glass !!


BEAM

[RGB LASER VERKOOP]

good job!

how much can i buy this from you ?
at what power will this be safe and not over heat?
laser greets joost

[polishedball]

good job!

how much can i buy this from you ?
at what power will this be safe and not over heat?
laser greets joost

Keeping this one, but all the build info is right in this thread. Noone really knows longevity. I ran this basic setup for 74 hours straight without issue but ambient temp was low. I am gonna add a TEC to the plate.

[CDBEAM]

I agree...to obtain most stable output....and likely increase LD MTTF....we need to TEC this one !!!

Also....I will be offering to supply the Cylinderical Lens Holder.....I must calculate the amount of time spent per unit....cost will be reasonable. Stay tuned !! Unfortunately.....we should all wait until the 6X Cylinderical lenses are tested....and hopefully found to be optimal.

BEAM

[polishedball]

New lens will surely offer better possibilities. For now this one is going on a second PJ and beam / lumia table so it will be very useful. Once I scan with it i'll also post pics. Still a little bit out. Though I do need to test some over sized galvo mirrors so maybe sooner than I think.

On the TEC, Any ideas on what size watt rating is needed for cooling diodes in general. ?

[LaNeK779]

there was some math here calculating voltage, current etc and heat dissipation, but i was never good at it or at remembering any of it...

i think something small should do the job, maybe around 10watt max, placed close to the diode with the sensor close by. no need to cool the entire mount, just the upper part where the diode is