803T ideas

Hi all,

I have had a lot of fun with the 803T HD dvd sleds and I am wondering what would happen if somebody where to drive the BR diode while it was still in the sled. What about the red diode?

--hydro15

Re:  pre-collamination

WHY would you want to do that ? :-? :phoenix77/rob

Re:  pre-collamination

To see what would happen.

Re:  pre-collamination

phoenix77 said:

WHY would you want to do that ? :-? :phoenix77/rob

Click to expand...

I know that there is a Dichro in there and there is also a red diode so would it be possible to combine there beams
while they are still in the drive. : :-? ;D

Re:  pre-collamination

there is a dichro a beam splitter and a host of other stuff..

Re:  pre-collamination

Ok, so is it possible to mix the red with the blu-ray? :-? :

Re:  pre-collamination

hydrogenman15 said:

Ok, so is it possible to mix the red with the blu-ray? :-? :

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yes.. the sled is designed for red and bluray to come out the same hole. so if they are both on, they will mix

Re:  pre-collamination

keeperx said:

[quote author=hydrogenman15 link=1214900346/0#5 date=1215413793]Ok, so is it possible to mix the red with the blu-ray? :-? :

Click to expand...

yes.. the sled is designed for red and bluray to come out the same hole. so if they are both on, they will mix [/quote]


Really, pink laser? :-?

Would the light be coherent?

--hydro

The mixed color would not be coherent. Each color still would be, but if you put it through a prism or something, it would separate the blue and red, and you'd have a spot of each.

Looking at the sled it seems the 405 and red/IR beams are combined in a polarizing cube beam splitter and then sent to a turning mirror and then the objective lens. What I'm not too sure about is how the detector picks up the return light from the cd/dvd as the turning mirror would send the light back along the original path towards the laser diodes.

Thoughts?

Also to consider, is that the final lens is a short focal length lens, designed to have a focal point directly on the surface of the disk. You won't be able to get a beam out of the drive, it'll be a flashlight of whatever color you turn on, and the violet and red would diverge at different rates as well.

pullbangdead said:

Also to consider, is that the final lens is a short focal length lens, designed to have a focal point directly on the surface of the disk. You won't be able to get a beam out of the drive, it'll be a flashlight of whatever color you turn on, and the violet and red would diverge at different rates as well.

Click to expand...

Yeah, :-[ I think that the best way to make a pink laser is to use a KES-400 diode and drive them both at once. Also it would have bad divergence too.

--hydro15

Been there, done that.

Pink 400A is not that hard to make. But because the diodes are stacked upon one another, the heat from the violet diode likely blew a hole in the red diode, which is now weaker, but accidentally exactly what I needed for pink. The divergence is not that bad if you can adjust the focus. When one wavelength is converging and the other diverging, you can project them both with the same diameter at a given distance.

I've successfully driven an LG red inside the sled, and after some modding I got it to focus at 25ft or something, not at all a bad divergence convergence. I'll definitely try this on the 803T when I get more sleds. (The pink mod too)



lots of stray ligt -- VERY dangerous! DON'T TRY THIS AT HOME. I WILL NOT BE HELD RESPONSIBLE FOR ANY AND ALL DAMAGE CAUSED BY THIS SETUP

[edit] it's not very efficient though. I had driven it at 275mA (would put out 150mW if it were in Aixiz with acrylic) and I could barely light a match. My guess is the sled emitted 80mW (from the main aperture)

Thanks for trying this zom-b.
I thought that that the beams would have the same divergence because of the optics inside.

--hydro15