Project "red"

[JimBo]

Yea, more pics!!! I want to see that beast light a box of matches...

How big is the beam? Divergence? I assume it has to be a relativly big beam. Do you have scanners that beam will fit on? That is going to be expensive to color balance...

Light a box of matches!!!!!!
More like light a bonfire .

Jim

[Phritzler]

Hallo!
Beam : 4*4mm and <1.5mrad (more 1.2mrad)
I will make Pics as soon if you want!
-Phil

[the_kcar]

Impressive, Phil - that must have been a migraine to fine-adjust!

Quite impressive

[marconi]

I agree...Very nice job Phil

That beam is " TIGHT " man.

I'd like to know what lenses you used for the telescope if you dont mind.
Getting the right combination is a real trick.

[Phritzler]

Hello!
There are 2 achromatic lenses, one with f=120mm the other with f=30mm
fG
Phil

[steve-o]

Well, Phil I think you deserve the PL award of the month for that one.
Can you shine it over towards the US so we can have a glimse?
Yes, more pics, please, maybe of the beam terminating on a mountain a few miles away or something..

[The_Doctor]

That would offend a few (thousand) fishes. Nice shiny beast that, very effective. Something vaguely comforting about it, like looking into a fire.

Phil, what diodes are you going to use for the 250 mW after optics? Any revelation of actual part numbers? Also, what point are you watching to align each beam? Far field? Focal point in the reducer? And, am I right in thinking you're not enlarging each beam before bouncing off mirrors? If so, that could confirm my guess that Arctos don't really need to do that. Your diode beams seem to be about 3 mm wide.

Interesting steering mirrors too, they look crude but accurate. Looks like they're using the central screw to shift beam offset and the lower two to steer. A nice exercise in not over-engineering. I love over-engineering but it doesn't usually go so far.

[Laser Ben]

Just thinking how awesome that would be with diodes from bluray burners.....

[p1t8ull]

achromatic lenses

What kind of losses are you getting with those achromats Phil?

They sorted out the beam aberration problem, but I found the losses too much to live with.

[Phritzler]

Hello!
At the moment I haven´t 250mW Diodes, but I test it. After my tests I know who Diode allows to get 250mW and I can post the Data.
The output diameter after the optics is ~5mm
On the telescope lenses I lost 4-6%/lens
-Phil