Lasers Optics for collimation

I want to know the best way to collimate a laser diode and where I can found some information about this .
I want to know if is posible to collimate a laser diode of Perpendicular
45·( beam divergence angle ) single mode and paralel 7 · multiple mode to a decent beam of 3-4 mmm and 1 mrad divergence . Thanks in advance...


Fernando

Hi Fernando...

Im trying this as well.. or I should say been trying.
Its tuff to collimate something with divergence this large and still look good and small both beam and spot..

Its a very good question