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PopN
Fusion Laser
Joined: 06 Jan 2006
Posts: 322
Picture(s): 12
Location: Sydney, Australia
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 Posted: 3/08/06, 7:16 AM Post subject: Spyder Lig |
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Ive seen Vids of people making tunnels with the Spyders and i was wondering if the shine of the tunnel would be as dangerious as the straight beam also would u need to wear eye protection while this tunnel is being made... because ive seen 300mw red dance laser show thigns on ebay
thx
popn
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dominico4
Wicked Lasers Master
Joined: 07 Dec 2005
Posts: 856
Movie(s): 1
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| Posted: 3/08/06, 7:46 AM Post subject: |
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I couldn't be positive just due to the speed of it, but no matter how fast it passes your eye, it'll come back to your eye at the same speed if you get into the line of fire. You'd probably be better off wearing goggles and then going in, just to be safe.
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PopN
Fusion Laser
Joined: 06 Jan 2006
Posts: 322
Picture(s): 12
Location: Sydney, Australia
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| Posted: 3/10/06, 2:05 AM Post subject: |
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cuse i wanna make a little disco light show(for my parties etc.) and i was wondering what would be the most sutible as in will look good(yes with a smoke mechine) and not dangerious... which should i get? would the 300mW be too dangerious?
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BoomDog
Wicked Lasers God
Joined: 14 Dec 2005
Posts: 1704
Picture(s): 31
Movie(s): 1
Location: OH, USA
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| Posted: 3/10/06, 2:26 AM Post subject: |
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Nero would be the best guy to respond to this, but I'll do my best.
I've taken videos of laser tunnels with a <115mw and had no problem going through the beam WITH A CAMERA (I was still wearing goggles). I wouldn't risk it without them, particularly with a 300mw, as higher powered lasers (even my <115mw) can cause damage before that "blink reflex" (where your eyes close instinctively from the light) actually occurs. Also, keep in mind that Nero's camera was destroyed while taking pics similar to this idea, and so what if those were your eyes? I'd DEFINITELY recommend getting goggles, regardless. You only have one set of eyes.
As for the Spyder series, I would wait for a week or two while all of these "freak laser" issues get confirmed. Some of the 300mw are supposedly showing up to 1 w (yes, not mw) of power, and that would be VERY BAD to use under this circumstance. Kiss your sight goodbye, even with scanned beams such as that. |
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PopN
Fusion Laser
Joined: 06 Jan 2006
Posts: 322
Picture(s): 12
Location: Sydney, Australia
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| Posted: 3/10/06, 2:35 AM Post subject: |
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so do u think a nexus would be fine to use and it wont be too evil on peoples eyes?
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NairB
Wicked Lasers God
Joined: 11 Dec 2005
Posts: 2006
Location: Scotland
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| Posted: 3/10/06, 3:02 AM Post subject: |
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| PopN wrote: |
| so do u think a nexus would be fine to use and it wont be too evil on peoples eyes? |
How do you propose to control the duty cycle of the Nexus....Will you be standing DJ'ing and powering the Nexus Like......if you are then just simply position your tunnel above everyones head because I dont recommend you have it going near anyones eyes at such close range. What if your scanners stuck and the beam shines directly into an eyeball.....
Sorry, but i would leave that sort of stuff to the pro's who have the proper equipment. 
Maybe Gottaluvlasers can give you some tips etc on this....he's a professional who does shows....im curious myself now to be honest  
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Athoul
Wicked Lasers God
Joined: 13 Sep 2005
Posts: 7544
Location: Canada
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| Posted: 3/10/06, 3:27 AM Post subject: |
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If you are going to build a laser scanner for shows, it needs to have safety features in place. For example it would need to have a failsafe that shuts the laser off immediatly if a scanner fails or stops for any reason. Also no matter what laser you're using, it has to be spread out enough such that there is no chance of greater then 5mW entering anyones eyes at any time.
Taking the above into account, you could build one with a Nexus but it would need some ingenuity on your part. You could for example, remove the battery cap and instead attach some modification where an emergency stop would cut power at this point. You would still need to dissipate the heat from the unit which might be a challege if you want to keep the unit in it's original housing.
I actually built a nice one awhile back(not out of a pen style laser however), though I've long since cannibalized the parts. In order to have all the safety features I used a laser and the various electro-mechanical devices all hooked up to a PLC(using ladder logic). This was a good way to incorporate certain fail safes such as for scanners that stopped or died, as well as emergency stop features etc.
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http://www.lasercommunity.com/movi_page.php?movis_id=84
Last edited by Athoul on 4/18/06, 9:26 PM; edited 1 time in total |
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nero_design
Wicked Lasers God
Joined: 02 Sep 2005
Posts: 1463
Picture(s): 98
Movie(s): 1
Location: Australia
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| Posted: 3/10/06, 8:16 AM Post subject: |
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I didn't think the shine from the spinning Spyder would be a serious concern myself but it still killed my video camera which is actually more rugged than my eye is.
When setting the laser up, I used a harmless red pointer to determine where the projection was likely to fall. Then I added the Spyder and used safety glasses whilst aiming the beam into the mirrors just in case it glanced off the mirrors and into my eye. When I was sure that the laser was aimed into the mirrors and the beam was being drawn into a shape at high speed, I removed the glasses but avoided looking directly into the light being reflected into the mirrors. When stepping into and out of the tunnels, I kept the glasses on and looked the opposite way to prevent a problem. I removed the glasses whilst safely in the tunnel and when on the outside.
Professional systems have fully enclosed "heads" and this completely removes the chances of a beam reflecting from the side of the mirrors ...and they also employ a set of spinning black metal blades which kick in to block the beam when the mirrors are not in motion. The beam blocking blades (they exist on my hand-built mirrors but were not wired up) are loose and simply hang down and only come into action when the powere is reduced to the other motors. Having exposed mirrors without a safety enclosure to protect against an accident is probably not suitable for public uses if the device has the chance to be fired anywhere near other people. I'd be inclined to use such a setup for home experiments or photography etc.
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Marco Nero
* Laser Gallery: http://www.pbase.com/nero_design/pro1wickedlasers
* Always use appropriate laser-safe eyewear when using higher powered lasers. |
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iPig
Wicked Lasers Master
Joined: 20 Mar 2006
Posts: 710
Picture(s): 11
Movie(s): 3
Location: L.A. CA USA
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| Posted: 4/18/06, 5:27 PM Post subject: |
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My friend did professional laser shows and he said it isn't harmful, even with his 400mW argon laser.
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timp
25mW Classic Wicked Laser
Joined: 03 Mar 2006
Posts: 36
Location: Portland, Oregon
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| Posted: 4/18/06, 6:07 PM Post subject: Tunnel tal |
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How many people can see the tunnel with goggles on????
NONE
So take them off, and enjoy the show!
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BoomDog
Wicked Lasers God
Joined: 14 Dec 2005
Posts: 1704
Picture(s): 31
Movie(s): 1
Location: OH, USA
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| Posted: 4/18/06, 8:34 PM Post subject: |
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We're not implying that everyone in the room should wear goggles... but if it is used as a lightshow, you have to be careful or its the last show you're gonna see. ESPECIALLY if it is a Spyder.
iPig, I imagine your friend uses professional equipment; if PopN purchased one of those than I imagine there wouldn't be much of a problem, but if you make your own scanner and use a spyder, I'm worried about too many unknowns: how fast the mirrors are traveling, how much IR is being leaked with the Spyder, etc.
I am NOT recommending this, and if you do it it is at your own risk, but my GUESS would be that a 95mw in a scanner would be realtively safe, but I am NOT SURE. Phew. I use a <115mw for my ametuer shows and luckily my camera hasn't been fried by going through tunnel walls (which as Nero said wouldn't be the case if my <115mw was instead a Spyder).
Another recommendation would be to maybe use a third mirror to do a slow spiralgraph, to make sure people can't stare into the beam for seconds on end. Just a thought. Until you know how your laser is going to act though, make sure to wear your goggles in the line of fire. It can't hurt. |
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