Looking for a lens...

[RA_pierce]

Hello...
First of all, My understanding of optics is limited. I am in need of assistance.

I need a lens.
For collimating a multimode laser diode with FAC.
Spec sheet says divergence is 3/8 degrees?? Whatever that means...

AR coated for 808+/-nm would be nice, but anything with at least 85% transmission for this wavelength would be fine.
I think an aspheric lens would work. ???
The lens will sit about 5mm above the surface of the emitter and I'm looking for a beam waist at about 1 meter if possible. Less is fine as long as it isn't less than 15-20cm.

If anyone could help me determine focal length and any other information for finding a suitable lens it would be very much appreciated.

How much would Edmund Optics charge for a custom lens? Do they even make "special orders?"

Also... What kind of transmission percentage can I expect from one of Jayrob's Meredith and 405-G-1 Aixiz lens mods at 808nm?
And the same for LarryDFW's lens.

[Sorry for the disorganized post... I haven't eaten yet today]


Thanks!

And if my requests are too specific or impossible without lots of $$$ I'll settle for whatever options work well enough! I need to find food.

 

[LarryDFW]

RA;

Since you have the fast axis correction lens mounted...
how large is the beam's largest axis after that lens ?

Most likely you will need a larger lens to collimate the larger beam at the F.L of the new lens .

The Hi-Power lens is ~1/4" in diameter.

I have several 25mm plano-convex Minolta lenses with a short F.L., which has worked on some 808nm bar diodes.

It is designed to work @ 700nm, so pass band should be OK.

LarryDFW