Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Since Blue light (445 nm) and around is considered dangerous, how come it is used in laser shows?

IceFireForce

Member
Joined
Jul 15, 2019
Messages
39
Points
8
I figured out I am wondering. How is it possible for blue lasers to be used in laser shows (even when diffused, thus much less powerful), if the blue light in any strength is considered to possibly cause photochemical damage to the eye?1.png2.png
 
Last edited:



IceFireForce

Member
Joined
Jul 15, 2019
Messages
39
Points
8
I am not sure yet what is the answer. It seems it’s either a) No, 380-500 nm lasers are not used for light shows; b) They are but shouldn’t or c) It’s a myth; the light is not THAT dangerous.
 

WizardG

Well-known member
LPF Site Supporter
Joined
May 9, 2011
Messages
737
Points
63
Got it right on the third try. Everything on this planet that has eyes has been exposed to 445nm light for as long as the sun has been shining. If 445nm blue was laying waste to our retinas I think we woulda' noticed by now.
 

steve001

Well-known member
Joined
Jun 3, 2007
Messages
2,367
Points
113
I figured out I am wondering. How is it possible for blue lasers to be used in laser shows (even when diffused, thus much less powerful), if the blue light in any strength is considered to possibly cause photochemical damage to the eye?View attachment 65905View attachment 65906
An analogy.
I can pass my hand through a candle flame without harm, yet if I hold my hand over the flame I will cause harm.
 

paul1598419

Well-known member
Joined
Sep 20, 2013
Messages
16,301
Points
113
In every study I have looked at, it is only intense light, like staring at the sun, that causes this kind of damage. For diffuse laser reflections and other sources of blue light, it is not something I have ever worried about and, to date, has caused none of the concerned damage to my old eyes according to my ophthalmologist.
 

WizardG

Well-known member
LPF Site Supporter
Joined
May 9, 2011
Messages
737
Points
63
Last edited:




Top