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Old 07-03-2011, 11:49 AM #1
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Default 780nm from CD Player & night vision

Hey,

I removed what i think is a 780nm 5.6mm diode from a old car CD player:



Mounted it in this little heat sink.



Im using Yukon Night vision equipment to view it. (used the 4x Monocular with camera mount to record video)



What it in action Here
I though the divergence would be pretty bad but when i focused it with an acrylic lens it was pretty tight beam.


Now the connections i used are as the following diagram i made:


Would the LD+ and Case pin be connected to each other?

As seen on the video, its running at 2.2V with 110mA, whats a typical max safe current for a CD player diode?

Tell me what you think?

Fiddy.


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Last edited by Fiddy; 07-14-2011 at 11:47 AM.
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Old 07-03-2011, 12:11 PM #2
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Default Re: 808nm from CD Player & night vision

Nice night vision video of your Laser's beam...
I think the LD wavelength from that Drive is probably 780nm..

If there is no positive voltage on your heat sink going back
to the LD case then I don't see a problem connecting the
case to negative if the case is electrically floating...

Maybe other members who have actually used these LDs
could chime in...


Jerry
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Old 07-03-2011, 08:34 PM #3
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Default Re: 808nm from CD Player & night vision

Yea CD players/burners would be 780nm. 110mA sounds like a bit much for a player diode. I would back off quite a bit.
Try different lower currents & you can locate the lasing threshold.
Nice video, only video of 780nm by true Night vision I've seen.
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Old 07-04-2011, 12:07 AM #4
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Default Re: 808nm from CD Player & night vision

Cool

+1 (if i can)
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Old 07-04-2011, 12:55 AM #5
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Default Re: 808nm from CD Player & night vision

Quote:
Originally Posted by HaloBlu View Post
Yea CD players/burners would be 780nm. 110mA sounds like a bit much for a player diode. I would back off quite a bit.
Try different lower currents & you can locate the lasing threshold.
Nice video, only video of 780nm by true Night vision I've seen.
Ahh ok, i cant see the 780nm beam, but can see the dot a little bit as a darkish red on some objects.

Good idea i found the threshold when i was slowly ramping up and down the current on my Power supply, haven't recorded it yet tho.
I figured that it wouldn't support mush current because the 'heatsink' it was sitting in was plastic

I had 2 other car audio CD players that i had removed from mates cars when doing new installations, these CD players where a lot newer than the one i removed the 780nm diode from.

I pulled apart this JVC player and couldn't find anything that resembled a diode.
When i looked closer and looked the on the opposite way the mirrors where facing i found what looks like a new version of a diode with about 10 pins coming off it, Have a look:







How would i go about utilizing this puppy?
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Old 07-04-2011, 06:14 AM #6
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Default Re: 808nm from CD Player & night vision

Update!

I used the Aixiz module as my LD- which means its case negative.

So i put it in a Guidesman host with a flexdrive V5 running at 63mA (thats the smallest output of the flexdrive)

She runs, its daytime here and i can see the dot, will wait for darkness to take a video.
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Last edited by Fiddy; 07-04-2011 at 06:25 AM.
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Old 07-04-2011, 12:00 PM #7
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Default Re: 808nm from CD Player & night vision

Did a video (pretty crap quality), its not very powerful at 63mA but it works!



the new rig.





Gunna get some higher power diodes and some safety glasses and see how we go.
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Old 07-04-2011, 12:33 PM #8
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Default Re: 808nm from CD Player & night vision

How many guidesmans do you have!

Rhd has some 9mm IR diodes pressed in Aixis clone modules that are more powerful then 1w for sale...
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Old 07-04-2011, 11:08 PM #9
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Default Re: 808nm from CD Player & night vision

Any quality video is better then none! Nice rig.
What gen night vision are they?

Quote:
Originally Posted by Fiddy View Post
Gunna get some higher power diodes and some safety glasses and see how we go.
I really would love to see some comparison of different wavelengths, night vision versus conventional cameras.
If you want invisible to eyesight 980nm or perhaps 850nm will likely do it.
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Last edited by HaloBlu; 07-04-2011 at 11:11 PM.
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Old 07-05-2011, 03:04 AM #10
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Default Re: 808nm from CD Player & night vision

This is a neat idea, but before you spend more time on it, you should get a CD-RW drive so you have an IR diode meant for burning to CDs. Otherwise, you'll be using some really lame and weak CD-player laser. To add insult to injury, car CD-players are meant only for playing audio CDs, which means only 1x read speed, or maybe slightly more if it was higher end and had some data buffering.
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Old 07-05-2011, 04:25 AM #11
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Default Re: 808nm from CD Player & night vision

Quote:
Originally Posted by LaZeRz View Post
How many guidesmans do you have!

Rhd has some 9mm IR diodes pressed in Aixis clone modules that are more powerful then 1w for sale...
Haha 8 to be exact

Yeah i saw them, i put an order in for a few of them as i have 2x 1W 9mm's sitting here!


Quote:
Originally Posted by HaloBlu View Post
Any quality video is better then none! Nice rig.
What gen night vision are they?

I really would love to see some comparison of different wavelengths, night vision versus conventional cameras.
If you want invisible to eyesight 980nm or perhaps 850nm will likely do it.
Im not sure im thinking Gen 1 ~ 2, it looks pretty crappy because im filming through the eye piece with a camera that's not very good for this type of thing.
Tho when you look through with your own eyes it is pretty clear!


Quote:
Originally Posted by Bionic-Badger View Post
This is a neat idea, but before you spend more time on it, you should get a CD-RW drive so you have an IR diode meant for burning to CDs. Otherwise, you'll be using some really lame and weak CD-player laser. To add insult to injury, car CD-players are meant only for playing audio CDs, which means only 1x read speed, or maybe slightly more if it was higher end and had some data buffering.
Yeah, thats the plan, ive been playing with the Low power ones atm cause i dont have IR Safety glasses and these where readily avaiblabe (stashed away under my bed )

Gunna purchase some 300mW & 500mW versions from china soon, Also sizing up some glasses too.
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405nm - 1,910mW (6)
445nm - 15,895mW (15)
450nm - 370mW (2)
473nm - 110mW (2)
532nm - 1250mW (6)
632.8nm - 2mW (1)
637nm - 5105mW (8)
660nm - 1,850mW (5)
670nm - 600mW (1)
685nm - 40mW (1)
808nm - 2,700mW (3)
RGB - 400mW (1)

In Progress:
405nm - 500mW+ Kryton Groove
445nm - 2,000mW+ C-88
520nm - 50mW Ultrafire RL-118 SS
632.8nm - 0.5mW Mini HeNe

Safety Glasses
2x Eagle Pair OD4+ 190nm-540nm
2x Eagle Pair OD4+ 90-400nm & 580-760nm
OEM Lasers OD 5+ 190-435nm & 730-1085nm

LaserBee 5W Laser Power Meter


>Fiddy's Review/Tutorial/Build Compilation Thread<
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Last edited by Fiddy; 07-05-2011 at 04:27 AM.
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Old 07-05-2011, 07:11 AM #12
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Default Re: 808nm from CD Player & night vision

You can get some OEM ML7 goggles. Good for green as well, but really good against IR.
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