Anamorphic prisms are go

[DjMagnus]

Ill get two sets!
You know if these work with the red 638nm diodes aswell? in that case, i will take 4 =)

[SrS]

Mine arrived too, many thanks!

This set of prisms really make the 445nm party complete
Here's a quick photo:

[Pardini]

I am still interested on 4 sets.

Pardini

[badger1666]

hi
what was the distance of that pic taken?
what lens did you use ?
best i have managed so far is 20mm x 4mm @22m using aixiz 405nm lens
thanks

Mine arrived too, many thanks!

This set of prisms really make the 445nm party complete
Here's a quick photo:

[p1t8ull]

Hey DjMagnus, from the information out there so far these prisms should work with the 638nm diodes and correct the astigmatism to some degree.
The AR coating is broadband and whilst not quite as effective out at wider angles with 638nm as it is with 445nm, it should still be pretty good. Rather than estimate how good or bad they are I'll test a pair of prisms on an astigmatic Mitsubishi 640nm/150mW diode tomorrow and post the results, also a PL member who also has these prisms has got one of the 638nm/500mW diodes on the way, so hopefully he can do a bit of testing and post up his findings.

I'll put you down for 4 for now and we'll adjust that if they crap out on the red diodes..

Ill get two sets!
You know if these work with the red 638nm diodes aswell? in that case, i will take 4 =)

[p1t8ull]

If focussed, then I'm guessing quite close.
These diodes are quite nasty really, we're just taming the slow axis to make it acceptable but the fast axis is still a pigs shit in its own right.
If you want to make a near perfect round beam then you'll need another pair of prisms on the fast axis to shrink the diameter and expand the divergence to better match the slow axis.
Nasty diodes

hi
what was the distance of that pic taken?
what lens did you use ?
best i have managed so far is 20mm x 4mm @22m using aixiz 405nm lens
thanks

[smogthemog]

I guess the extra 2 prisms, to correct the FA, would be mounted 90 degrees to the other SA adjusting pair?

[badger1666]

i did not know i could use two sets of prisms
well i am off to my work shop then
going to be a pain mounting them at 90deg to the others
thanks
simon

If focussed, then I'm guessing quite close.
These diodes are quite nasty really, we're just taming the slow axis to make it acceptable but the fast axis is still a pigs shit in its own right.
If you want to make a near perfect round beam then you'll need another pair of prisms on the fast axis to shrink the diameter and expand the divergence to better match the slow axis.
Nasty diodes

[p1t8ull]

Indeedy 90 degrees
And the prism angles would need to be reversed, so beam right to left in order to shrink the diameter and increase divergence:

I guess the extra 2 prisms, to correct the FA, would be mounted 90 degrees to the other SA adjusting pair?

[smogthemog]

Also, is the distance from the 445 collimating lens to the first prism critical?
I really need to put the first prism as close to lens as possible.
My proposed setup below minus the prisms: