Need some advice for my 1W 808nm laser build

[HIMNL9]

Lenses so small with short FL can be found sometimes (like, 4 or 5 mm), but are not too common ..... those that are presented in the forum as 405-G-! and (IIRC) 630-G-! are aspherical ones ..... or you can ask an optic shop, or maybe on surplus shed site .....

 

[ReNNo]

It's easier to say "impossible" .
I was looking on surplus and I didn't find lens with short FL.

There is no way that optic shop in my country can do something like that.

 

[HIMNL9]

If you need small lenses, the ones on CD / DVD sleds have a short FL ..... but as i said, they are small also in diameter .....

 

[ReNNo]

Yes, they are very small.
I need lens with the shortest FL and not smaller diameter than 7mm.