WTB - Collimator optic Suitable for a 10W Copper Vapour Laser

[smogthemog]

Companies like that really boil my pi$$!

What is the point of being in business if you can't be arsed to follow up on business leads!

[p1t8ull]

I thought attractions were no more.. ?

[QUAZAR]

Pulslight in Romania also make CuBr lasers. Their 10W model has a 20mm beam diamater. I am sure they do collimating telescopes for their models. They may well be worth contacting.

[dsli_jon]

Hey Smog -

'Couple weeks ago, I posted about THIS colli-mater on eBunk...

..well, I kinda-sorta made him an offer, and he kinda-sorta accepted it Sooo, I will let you know how the transaction goes - I'll take good pix / post and list specs, and if you want it, it will be yours for what paid + shipping, etc

SO, paid for it, GOT it, transaction was fine (no delays, packed-well, etc, etc - ) Anyhoo, pics are below...

I tested it with a 40W KTP (turned down to ~12W, max, for demo-purposes, since I am pretty sure your CV - as cool as it is is not putting-out that kind of power, so I wanted to compare as close-as-possible power-levels...) and did tests with a 'raw' (uncollimated)
KTP beam, a collimated one (using ~200mm FL achromat) and an expanded/collimated beam (I expanded it to 'flood' the input-side of this beast; prolly a ~25mm beam) and the results were pretty interesting...

Basically, this thing seems to have about a 500 cm focal-length - it's reeeally long. The best results were with the collimated / expanded/collimated beams, but either way, at the end of half-of-our ~300' hallway (~150') the results were pretty good. I'd say, if you are looking to get your beam down to ~18-20mm for use on relatively hi-speed-to-size ratio galvos, well, you'll certainly need more than this, but for final output to galvos, this should give you a pretty long 'throw'...

So, like I said, if you're interested, PM-me, and it's yours at-cost / shipping; If you're not interested, , no sweat - I am sure we'll put it to use somewhere down the line... either way, I'd bet you'll have to do a bit of 'playing around' to find the best balance for that beam you've got... I'd say, try playing with this unit, combined with a rifle scope... Perhaps there are some optical engineers, here on PL, that could recommend an exact 'combo', based on being able to do the 'math' on this all... I'm tapped-out...

Anyhoo, hope this helps...
ciao
j

[LesioQ]

Jon,
Just a side question - what is Your KTP's raw output beam diameter at high power (>15W) ?
Piotr

[smogthemog]

Thanks for the Pic's J (?), I am just off to work now but will take a closer look later.
I does look from the quick look I did take to be a bit over budget for me as the Spectronika version only works out at £150 and has a 2.3x collimating compression which seems a little better then the one you have??
My 20mm CVL beam should collimate to about 9mm with the Spectronika.

Will look later mate

Thanks
Jim

[smogthemog]

Hmmm - Looks to be a bit pricey for what funds I have at the moment.
I does look like it will do the job though.

I have re-emailed Alexander @ Spectronika to see if he can supply a 28mm in collimator but with a 3.5X, or more, compression. I really need the output beam to be as thin as possible to fit through the colour selector and my scanset.

The Collimator is going to sit inbetween the output from the 45 degree mirror, which at the moment has a lens, that will be removed, on it that focused the beam down onto the end of the fibre optic, and the colour selector with the scanset will be on the other side of that.

[dsli_jon]

Hey Piotr -

Jon,
Just a side question - what is Your KTP's raw output beam diameter at high power (>15W) ?

Depends at which-point you measure - right at the OC, it is probably only ~2mm, but diverges very rapidly from there; un-collimated, these things usually have ~12-14mRad div. or worse, depending-on where your 'sweet-spot' is on your particular KTP-crystal - some like their 'back scratched' at a pretty-wild angle, before they'll put out top-power, and in-such a case, you'll get a bit-wider div.

Anyhoo, if you're trying to ask 'what do we use to get such a great beam' , etc, PM-me and I can send you our 'top-secret formula' for killer-ktp-kollimation...

peace..
j

Hey Jim -

Hmmm - Looks to be a bit pricey for what funds I have at the moment.
I does look like it will do the job though.

I have re-emailed Alexander @ Spectronika to see if he can supply a 28mm in collimator but with a 3.5X, or more, compression. I really need the output beam to be as thin as possible to fit through the colour selector and my scanset.

Well, I understand - $275. USD is a good-bit of cash to just 'play-around-with' I certainly can make no 'guarantees' that this giant tube would fit your bill... But, if you decide you wanna 'give it a shot', it will be here, safe-and-snug in a box... Even if you did pick
it up, it might actually be better to take the thing apart, and try your own combo of focal-length / lens combining to find the optimal formula for your beastie, there - you might actually find that you'll have to go 'custom / experimental' vs an all-done 'off-the-shelf' solution... dunno... But certainly, Spectronika is a good place to start...

Anyhoo, if you decide you want this beastie for your beastie just lemme knowstie...

Cheers...
j

[smogthemog]

Okie Diddly pokies me old fruit bat, I wilco do

Thanks 'N' stuff for yer toime involved

Jim

[Lasernerd]

I have the optics you could use!