I’m doing a science project and need to use a laser pointer. The project is about making a toy for children aged 9 to 12. Since light from a laser pointer is harmful to the eyes, I want to put maybe a material to filter some harmful stuff or something from the laser light. If possible, please tell me where I can purchase it. Other ways to make laser light less harmful are welcome.
I don’t think the light from a cheap low power laser pointer can harm eyes. Check that the power level is less than 1 mW.
The US limit is 5 mW, but the UK limit is 1 mW, so I’d stick with less than 1 mW
.
Tags: Pointer
I don’t think the light from a cheap low power laser pointer can harm eyes. Check that the power level is less than 1 mW.
The US limit is 5 mW, but the UK limit is 1 mW, so I’d stick with less than 1 mW
.
References :
Why do you need the laser pointer?
The reason the pointer can be hazardous is that the light is approximately parallel. If someone can look straight into the light it is all focussed on one point in the retina.
To make things safer.. if it is possible to design things so that it isn’t possible to look directly into the light then it is quite safe.
If this isn’t possible then if it is possible to use some device to scatter the light this reduces the intensity at an eye by a large margin. By device a simple lens can cause the rays to be no longer parallel.
Of course this lessens the intensity of the dot and it makes it bigger at the same time so it might not be an option for the device.
How bright does the dot need to be. If it doesn’t need full brightness any filter at all can absorb some of the light and reduce the potential power to the eyeball.
References :