Old 07-01-2008, 09:19 AM #1
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Default 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


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Old 07-01-2008, 12:54 PM #2
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Default Re:  pre-collamination

WHY would you want to do that ? :-? :phoenix77/rob 8-)
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Old 07-01-2008, 04:02 PM #3
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Default Re:  pre-collamination

To see what would happen.
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Old 07-03-2008, 12:14 AM #4
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Default Re:  pre-collamination

Quote:
Originally Posted by phoenix77
WHY would you want to do that ? :-? :phoenix77/rob 8-)

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
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Old 07-06-2008, 07:24 PM #5
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Default Re:  pre-collamination

there is a dichro a beam splitter and a host of other stuff..
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Old 07-07-2008, 07:56 AM #6
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Default Re:  pre-collamination

Ok, so is it possible to mix the red with the blu-ray? :-? :
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Old 07-07-2008, 01:01 PM #7
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Default Re:  pre-collamination

Quote:
Originally Posted by hydrogenman15
Ok, so is it possible to mix the red with the blu-ray? :-? :
yes.. the sled is designed for red and bluray to come out the same hole. so if they are both on, they will mix
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Old 07-10-2008, 04:29 AM #8
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Default Re:  pre-collamination

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

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Old 07-14-2008, 04:05 PM #9
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Default Re: 803T ideas

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.
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Old 07-27-2008, 06:22 AM #10
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Default Re: 803T ideas

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?
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Old 07-28-2008, 09:51 PM #11
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Default Re: 803T ideas

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.
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Old 07-29-2008, 01:10 PM #12
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Default Re: 803T ideas

Quote:
Originally Posted by pullbangdead
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.

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
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Old 07-29-2008, 01:34 PM #13
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Default Re: 803T ideas

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 [s]divergence[/s] 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 8-)

[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)
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Old 07-30-2008, 12:29 AM #14
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Default Re: 803T ideas

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

--hydro15
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