Red diodes and collimators.

[shrad]

Hi marco,

if you have the ability to do that easily, could you please draw me a quote by PM please?

thanks a lot!

[hobbybob]

Hi Marco,

With "magic" lenses do you refer to the Thorlabs or to the Lens27 ?
I think this is very interesting. Can a long open can 300mW red be used with your lenses ?
Currently i am thinking of building a quad red setup. Your lenses could be the perfect companion.
And what beamspecs can we expect. I like the beamspecs McCarrot posted. small with very, very low divergence.

Hope to hear from you soon.

Hello Shrad,

i can offer this "magic" lenses complet with a collimator (dia. 11x12mm) for
just 35,- Euro We also have a version for 405nm / 445nm Dioden !
They work much better than any 3 lense design, the losses are very
small so that you get full power from the LD at rated current.

greetings,
marco

[kl79]

With "Marco's diodes" and "Marco's lens", you will have a 1.2x2mm spot with 0.7mRad divergence.
With other diodes, the spot seems to be approximately the same.

[marco]

Hello,

no, i don't talked about the Lens27, this is a cheap taiwan
lens system with not so much magic behind.
You can use a long 5,6mm LD (like J27 or J29) with our collimators,
this is no problem. The beam with a 660nm diode is nearly 2x1,2mm,
divergence can be close to 0,65mrad. I can post a picture made with a
beamprofiler next days.

greetings,
marco

Hi Marco,

With "magic" lenses do you refer to the Thorlabs or to the Lens27 ?
I think this is very interesting. Can a long open can 300mW red be used with your lenses ?
Currently i am thinking of building a quad red setup. Your lenses could be the perfect companion.
And what beamspecs can we expect. I like the beamspecs McCarrot posted. small with very, very low divergence.

Hope to hear from you soon.

[hobbybob]

very interesting Marco !
I now use Daedal's lenses, which give me a 10mm dot at 10meters, which is not bad.
I thought the Aixiz lens glass was better, ordered 6, but they give not a nice round dot, but a dot with a "stripe" on 1 side.

Do you also have diode/lens holders ? To mount the magic lens and diode in a cooling block i mean ?
Since i read your lenses are 11mm unfortunately. The stands i like (from Laserman) are 12mm...
I have already some kapton tape underway, so a mount with 11mm hole would be good to hold this magic lens. I can use the kapton tape to electrically isolate the diode/lens but also it is heatconductive so it will transfer heat away. With the profile you say it's possible to make a 2x2mm beam (if it's 3x3mm i also don't care ;-) But the low divergence would make a great red.
I need a LOOOOOT of red..... since i have almost 300mW blue ;-)

Looking forward to your pictures and if you have a solution to make a quad, or have holders / parts let me know... this is getting more and more interesting.

[drlava]

marco, at 35 euro your solution is more expensive than the lens27 solution. How is the diode mounted, and how is the lens adjusted?

[mccarrot]

Lens 27 = a lens only with 1,5mrad

Marco's = a complete collimator where you can glue in (thermal glue) the diode with 0,65mrad (depending on diode)

[kl79]

http://www.photonlexicon.com/forums/...chmentid=13556

[badger1666]

lens 27 = 1.5 mrd , why would you want less. ?
all the greens and blues out there are about 1.5 mrd ,so it makes a good match then .
i use lens 27 on my 642nm and that more like <1 mrd so why they quote 1.5 on the data sheet i dont know

[badger1666]

http://www.photonlexicon.com/forums/...chmentid=13556

and how much does that cost ?
i expect you could get a ready made lw 640 for what he would want for one of those