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Old 08-12-2014, 07:04 PM - Thread Starter
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Will shining a red laser pointer damage plasma tv?

One of those red laser pointers, from walmart for 3 dollars. Will pointing it at my plasma tv screen damage it in any way? My kids shined the laser at the tv. Any ideas? Thanks. Might sound like a stupid question. But im curious
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Old 08-12-2014, 07:08 PM
 
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Your TV will be fine. Just don't let them point those things at aircraft.

Last edited by nipalikewalnuts; 08-12-2014 at 07:13 PM.
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Old 08-12-2014, 11:20 PM
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those low powered cheap lasers won't do anything to anything other than your eyes.


when you buy one that melts plastic, then you gotta be careful

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Old 08-13-2014, 09:57 AM
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Lol. It's a weak red bulbed flash light. What do you think its a weapon? Lmao!!!

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Old 08-13-2014, 10:14 AM
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Quote:
Originally Posted by Semp1 View Post
Lol. It's a weak red bulbed flash light. What do you think its a weapon? Lmao!!!
A laser is not bulbed, nor a flashlight. Even a weak laser can cause eye damage due to the high degree of collimation and resulting power densities within the beam. A Class 1 or Class 2 laser should be okay as your natural blink reflex will cause you to close your eyelid before any permanent damage can occur within your eye. That being said, if kids decide to stare at the beam as a game of dare, etc, they can very likely damage their eyes (at least with Class 2 lasers). This is why I would highly recommend that parents not let kids play with laser pointers till they are old enough to learn how to use them responsibly.

Moreover, a lot of cheap "bright" laser pointers that you can purchase off ebay, etc, can exceed class 2 levels. Stray reflections from other surfaces can infact cause eye damage.

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Originally Posted by Plasma5300 View Post
One of those red laser pointers, from walmart for 3 dollars. Will pointing it at my plasma tv screen damage it in any way? My kids shined the laser at the tv. Any ideas? Thanks. Might sound like a stupid question. But im curious
See my comment above. That being said, unless you have an extremely high power laser, you are not going to risk burning/damaging things unless you focus the laser down using a lens. The risk to eyes are far greater even with lower powers because your eyes do a great job of focusing laser light down to a point on your retina, drastically increasing local power densities on your retina.
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Old 08-13-2014, 12:16 PM
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Stop it. lol.

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Old 08-13-2014, 12:20 PM
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Well, I guess you can only make do so much to ward off human stupidity. Lol lol lol... amirite?
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Old 08-13-2014, 12:38 PM
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Only a Class 3B, IIIB, 4, or IV laser is likely to cause damage. Even a Class 2/II laser needs in the area of 2 mins of direct eye exposure to do permanent damage.

If they are playing with class 3B or class 4 lasers, first off, WHY ARE YOU ALLOWING THAT IN The FIRST PLACE?!

Otherwise, worst case with class 1 and 2 is the laser will reflect of of the plasma panel and irritate the crap our of you til you scream at the kids and toss the laser pointer in the trash.

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Old 08-13-2014, 12:59 PM
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Do you have a link/reference regarding the 2 min direct exposure for Class 2 lasers? I work with lasers all the time and AFAIK, they are primarily deemed safe because of the blink reflex which limits total exposure time.
http://www.sciencebuddies.org/scienc...r_Safety.shtml
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A Class 2 laser is safe because the blink reflex will limit the exposure to no more than 0.25 seconds. It only applies to visible-light lasers (400-700 nm). Class-2 lasers are limited to 1 mW continuous wave, or more if the emission time is less than 0.25 seconds or if the light is not spatially coherent. Intentional suppression of the blink reflex could lead to eye injury. Many laser pointers are class 2.
This is also why IR lasers are more dangerous since we don't have the blink reflex with radiation we can't see.

The real danger though is that a lot of cheap made in China laser pointers - especially the frequency doubled Green laser pointers, have been found to exceed Class 2 limits (by large margins). I've come across several articles regarding this a couple of years back. Some were over 20mW, yet labeled as Class 1/2!

Kids do stupid **** all the time, so unless you're sure you have a Class 1 laser pointer, it might be a good idea to give them something else to entertain themselves with.
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Old 08-13-2014, 01:06 PM
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This could be dangerous.
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Old 08-13-2014, 01:19 PM - Thread Starter
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Lol! These comments are great!!!
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Old 08-13-2014, 02:12 PM
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Quote:
Originally Posted by nipalikewalnuts View Post
Your TV will be fine. Just don't let them point those things at aircraft.
He did say it was red, not green so I don't think he really has to worry about pointing them at aircraft.
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Old 08-13-2014, 02:13 PM
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This could be dangerous.
Lol. Well atleast he's wearing OD+10000 protective eyewear, so he's got that going for him
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Old 08-13-2014, 07:39 PM
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Guys I think I got my kid a class 1 laser at Rite Aid. What do I do? It was $1. It's definitely not just a cheap light it might be doing damage to the walls and plasma in my house when the kids point it there. Lmaooooooo. C'mon. Lol.

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