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What is this light called?


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#1 Fernando Nicolas

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Posted 23 March 2015 - 10:41 AM

https://youtu.be/PqEniS5CQYo?t=33s

 

Green, moving light on the girl in the dark.

 

And where could I purchase it? 

Thank you. 


Edited by Fernando Nicolas, 23 March 2015 - 10:42 AM.

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#2 David Mullen ASC

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Posted 23 March 2015 - 02:16 PM

It's a green laser light projector, various models produce different patterns. You can do a Google search to find the model you want.
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#3 Phil Rhodes

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Posted 23 March 2015 - 03:32 PM

Might it also just be a video projector with green imagery? I'd be a bit cautious about firing most green lasers into someone's face like that.


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#4 Rakesh Malik

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Posted 23 March 2015 - 06:48 PM

I would have guessed that it was just a projector with green imagery in front of it, because green lasers sparked some controversy due to their ability to permanently impair people's vision. Of course, the bad apple syndrome had a lot to do with it, some people pointed their green lasers at aircraft, and blinded some pilots.

 

Do these laser projectors diffuse the beams enough to render them safe, or are they something different from the green lasers in pointers that some of us are probably thinking of?


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#5 David Mullen ASC

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Posted 23 March 2015 - 07:20 PM

The particular projectors will come with safety guidelines but generally the real low-wattage ones are considered safe otherwise they wouldn't be used as kid's toys (we had a toy green laser star projector in the kid's bedroom set in "Extant" for example, and it was safe to shine onto people) or used in public events projected over people.  But obviously use an over-abundance of caution...


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#6 Fernando Nicolas

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Posted 23 March 2015 - 07:42 PM

Thanks for the responses guys. Appreciated. 


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#7 Phil Rhodes

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Posted 23 March 2015 - 08:11 PM

Let's not confuse laser projection with laser effects devices. "Laser projectors" such as those that are currently being discussed for cinema installation are laser illuminated, using the lasers as a light source which is diffused and reflected from a DLP device in the normal way, so they offer more or less the same optical hazard as a more conventional projector using a gas discharge lamp. Some laser projectors which fire red, green and blue beams out of an aperture and scan them to create a raster do exist, but at much lower power levels.

 

Laser effects devices tend to fire a laser beam, which is more hazardous.

 

Green lasers look brighter than red or blue ones, relative to their actual power output, because of the relative sensitivity of the human eye to green light.

 

P


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