Building Red Laser from DvDs & Blu Ray?

[djlorenz]

Now... i watched around... i see a lot of people building a little pointer with the diode taken from a dvd burner... but no one that used it for laser projectors...

my idea is to use about 5/10 16x dvd burner laser diodes with PBS for making about 500mW/1W red output for a laserprojector...

what do you think about? has anyone tried it?

i see that dvd burners have different power for different speeds...

i found this:

2x 20mw 40mA
4x 40mw 80mA
8x 80mW 150mA
16x 120mW 250mA

but in others websites i found that 16x diodes reaches more than 300mw

for the modulation... i saw this:
http://www.stanwax.plus.com/lw/housingkit.html

but do you think that is possible to regulate the max current into the diode with a trimmer?


Thank you for your support

[allthatwhichis]

Actually, I think many here have used dvd burner diodes in their projectors. I think the " long open can" diodes are from dvd burners, 22x I think, but I may be wrong.

[Laser Ben]

You can only combine 2 laser diodes using a PBS, you would have to stack the diodes to combine them.

[djlorenz]

why not more than two?

is not possible to do something like this?

(sorry for the bad windows paint scheme )

[KGB]

"Cubes left pass one polarized plane and reflect the other, so you can join one pass (horizontal) and one reflect (vertical) ..... but now, your beam have both h and v polarization, so if you pass it in another cube, half pass through and half reflect away ..... the second cube split away the 2 beams, so you can't use it for join a third one without loose one of the first 2, and so on..."

-HIMNL9

[djlorenz]

mmm.. i didn't know this..

so, this is not possible to add more than 2 beams toegether?

[shrad]

it is possible by combining groups of beams which are close enough to be like one

like four in a square in each side of the cube = a big square of red light

then a telescope = a small square of red light of high power density

[KGB]

Try searching around here for "knife edge mirror"


here are some links:-from buffo

Phritzler's massive 24-diode red project

Andy Con explains how hard it is to align the mirrors to pull off the "knife edge" trick

Good thread explaining the difference between PBS cubes and mounts. Note the picture of an Arctos projector mentioned above in the 8th post. (the square mirror mounts look like cubes, but they're not)

[djlorenz]

tnx guys!

i watched the links... too difficult stuffs for me.. i dont know too much about polarization and lens... i think i will use only 2 red diodes and reach low powe lasers...

about the modulation? has anyone know how the Stanwaxs driver + support work?

Thank You so much

[Steve Milani]

Ciao Lorenzo
Too many mechanics and optics components and then the final result could be a very "fat" red beam. No good.

Maybe it could be cheaper..... but... I sincerely think the best way to obtain a powerful red is...to buy one from a good seller...

Oh.... I'm talking about new red @640nm, obviously!
And you already know which good sellers are

Greets!