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lasers

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Unread postAuthor: jon_89 » Sat Jan 12, 2008 11:59 pm

Today I was looking around and found a laser made with a dvd laser. Anybody here know anything about this or done it before?
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 13, 2008 12:06 am

[youtube]http://www.youtube.com/watch?v=CgJ0EpxjZBU[/youtube]
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Unread postAuthor: spudy buddy » Sun Jan 13, 2008 12:08 am

i know that if you use the diod from a dvd/cd burner than the laser can burn throgh paper in theory. haven't done it though.
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Unread postAuthor: jon_89 » Sun Jan 13, 2008 12:17 am

Hey Jack your video says no longer available. What would be the difference between this and one of those cheapo laser pointers? I was reading people just hooking up a couple batteries to a dvd burner laser and it worked but then I read somewhere else you have to buy a laser diode. Is it really that simple?
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 13, 2008 12:21 am

Try here or check out the instructable.
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Unread postAuthor: jon_89 » Sun Jan 13, 2008 12:24 am

This is what I was going for.[url]=http://www.felesmagus.com/pages/lasers-howto.html[/url] Do I have to buy a laser diode though?
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 13, 2008 12:35 am

jon_89 wrote:This is what I was going for - lasers how-to

Do I have to buy a laser diode though?


No, you get the diode from the the DVD burner:

Once I had the DVD drive, it took me less than 15 minutes to completely strip it and extract the optical works. There were two diodes, lots of little mirrors and things, and some circuitry. It took another few minutes to extract the two diodes with their heat sinks. The rest of the optical bits and pieces were saved, as was the motor that opened and closed the drawer - it can be used, with a mirror, to do effects. Everything else was junked.
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Unread postAuthor: jon_89 » Sun Jan 13, 2008 12:41 am

Well I was confused with the instructables and this one. :oops:
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Unread postAuthor: spudy buddy » Sun Jan 13, 2008 2:10 am

the thing that makes a cheapo laser pointer and the dvd bernur one different is the fact that the dvd one is made to burn little tine miceoscopic holes in dvd and cd disks which are hard plastic so the diode needs to be pretty strog. cheap laser pointers arn't ment to burn stuff for a safty issue.(imagine every little kid havind a burning laser pointer and pointing them at each other lol)
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Unread postAuthor: jon_89 » Sun Jan 13, 2008 2:47 am

do you think it would burn a hole in paper from 3 feet away?
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Unread postAuthor: Eddbot » Sun Jan 13, 2008 2:52 am

spudy buddy wrote:(imagine every little kid havind a burning laser pointer and pointing them at each other lol)
:violent3:
that's going into my stash of unforgetable quotes along with my favorite from JSR:

jackssmirkingrevenge wrote:"fetish" (as I've seen it called in this thread - one would think I rub myself with the stuff in the bedroom :roll: :D <sup>*</sup> )
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Unread postAuthor: jon_89 » Sun Jan 13, 2008 3:55 am

what is mw and nm? the nm seems to be pretty constant but mw goes from 5 to 10 and up?
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Unread postAuthor: jon_89 » Sun Jan 13, 2008 4:07 am

what is meant by mw and nm? what are the differences?
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 13, 2008 4:13 am

As far as I can tell, MW is milliwatts, a measure of power, while NM refers to nanometres, a measure of the wavelength perhaps?
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Unread postAuthor: Novacastrian » Sun Jan 13, 2008 4:13 am

Sorry, i could not,<a href="http://www.youtube.com/watch?v=Nh5Lh-tTSZQ">Resist</a>
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