Question about focusing the lenses

[Mazenga]

im a beginner... and i got 2 green laser module..
then i attached a DVD LG Red laser diode and
i spin it until 300ma. and that was GREAT...
but it was impossible for me to get it focused to have a straight line..
also the dot is very big.. and messy
i tried the same over two green laser module ..
the results were the same!!!

so whats the problem??
my question is ...
is every laser color has its own lenses type?
and whats the best way to resolve my problem with my green laser module?
and what kind of lenses should i use..??
THX

 

[Mazenga]

i think that i found the answer in the picture that i attached ,
if any body that can help me with more info..
that will be great....

 

[BShanahan14rulz]

If you are using the lenses from the green modules, you will probably need both the lenses. You are adjusting the distance between the lens and diode and still can't get it to be a tiny dot, right? What are your options on obtaining parts? Simplest solution would be to just buy an aixiz module, and buy a glass lens for red.