Laser-illuminated sand!  
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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> Off Topic Forum - Cars, Trucks, Buggies and more >> Laser-illuminated sand!
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Laser-illuminated sand! - 8/13/2007 12:35:05 AM   
Anomie



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Joined: 4/15/2005
From: Livermore, CA, USA
Status: online 		These are a few pictures that I took during calibration of two video cameras for a 3D PIV system being used at NASA for post research on the Deep Impact mission of July 2005. They were shot on 8/1 of this year, and were part of a 90-some image capture while the work was being performed.

The woman in the pictures is wearing safety goggles and dropping some fine sand through a laser sheet being projected above the floor of the chamber. The cameras were mounted above the chamber and viewing through glass ports. I was also wearing goggles and as such the laser was not visible to my eyes. These images were tough for many reasons - The exposure was slow, typically 1/3- or 1/4-second, there was no room in the doorway for a tripod or monopod, and also the fact that the camera was able to focus on the sand contacting the laser sheet, but I was not able to see it until the image was taken. (Unlike compact digital cameras, a digital SLR does not have a live image on the display during shooting. The image must be viewed through the viewfinder.)

Anyway, without going into a bunch of detail on the work, I just thought some people would enjoy these pictures. I can answer questions if necessary.









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RE: Laser-illuminated sand! - 8/13/2007 12:45:05 AM   
Takedown



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From: Oshkosh, WI, USA
Status: offline 		That is sweet!

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RE: Laser-illuminated sand! - 8/13/2007 1:00:19 AM   
Anomie



Posts: 3623
Joined: 4/15/2005
From: Livermore, CA, USA
Status: online 		A few more shots...







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RE: Laser-illuminated sand! - 8/13/2007 1:08:02 AM   
lee172



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Joined: 9/20/2006
From: Midlands, UNITED KINGDOM
Status: online 		some nice 'nightclub effects' going on there! the woman seems to be enjoying herself!

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RE: Laser-illuminated sand! - 8/13/2007 3:18:05 AM   
Nick2618



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Joined: 3/15/2007
From: Sarasota, FL, USA
Status: offline 		So the sand is actually bouncing off the the lasers? I thought lasers where only beams of light that could not be "touched" or "act on other objects" other then heat them up.

Help me understand lol

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RE: Laser-illuminated sand! - 8/13/2007 11:48:13 AM   
nitro _ burner



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From: adelaide, AUSTRALIA
Status: offline
quote:

ORIGINAL: nick2618

So the sand is actually bouncing off the the lasers? I thought lasers where only beams of light that could not be "touched" or "act on other objects" other then heat them up.

Help me understand lol

I think there is a sheet of laser light and when the sand passes through it it lights up, just like when you put a laser light or torch on your finger or in your mouth.

Then God said let there be light..... illuminated sand!!! lol

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RE: Laser-illuminated sand! - 8/13/2007 12:33:59 PM   
Anomie



Posts: 3623
Joined: 4/15/2005
From: Livermore, CA, USA
Status: online 		Yes, the sand is passing through the laser sheet. In a couple of the shots, there is some sand bouncing up from the bucket underneath.

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RE: Laser-illuminated sand! - 8/13/2007 9:43:15 PM   
(X)



Posts: 679
Joined: 6/13/2007
From: COLCHESTER, UNITED KINGDOM
Status: offline 		Wow that looks cool

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RE: Laser-illuminated sand! - 8/13/2007 10:04:37 PM   
Wisconsin Nitro



Posts: 1445
Joined: 6/4/2005
From: Fitchburg, WI, USA
Status: offline 		what a filthy chamber you got there seriously looks like blades are gons swing down from above and kill you both

still the sand and lasers look pretty cool there

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RE: Laser-illuminated sand! - 8/14/2007 4:00:07 AM   
Nick2618



Posts: 3656
Joined: 3/15/2007
From: Sarasota, FL, USA
Status: offline 		In this shot it actually looks like the sand is bouncing off the light.


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RE: Laser-illuminated sand! - 8/14/2007 5:00:42 AM   
jatoracing33



Posts: 2260
Joined: 7/19/2007
From: johnstown, PA, USA
Status: offline 		wat a job...get paid to play in a sand box


looks slick tho

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RE: Laser-illuminated sand! - 8/14/2007 5:06:02 AM   
ssj2



Posts: 2278
Joined: 10/12/2005
From: Niles, IL, USA
Status: offline 		That is absolutely sick bro, nice pics!

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