Discussion Forums > Technology

Blue Lazer pointer

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NaRu:
Oh do I want one. Never would pay that much for one though
http://www.thinkgeek.com/gadgets/lights/896a/

Chiyachan:
http://www.youtube.com/watch?v=xfj1n8vPWCE
>_> Work it out from this.

quekmeister:
If you look at the other laser pointers on sale, the red laser is $7.99 and the green laser is 69.99, so this one is just another 10 times more expensive. ;)

EDIT: Just found this, I don't see that much difference in the colour, and it's much cheaper.

Lupin:
why not build your own?

DaggerLite:
Just before anyone gets hurt while playing with Blu-ray lasers:

--- Quote from: Hack n Mod ---Important: This is a class 3B laser and should be used with care. Proper eye protection for 405nm wavelength recommended. It can instantly damage the eye if it is pointed directly into the eye. Even reflections can cause eye damage.
--- End quote ---

--- Quote from: Wikipedia ---Class 3B

A Class 3B laser is hazardous if the eye is exposed directly, but diffuse reflections such as from paper or other matte surfaces are not harmful. Continuous lasers in the wavelength range from 315 nm to far infrared are limited to 0.5 W. For pulsed lasers between 400 and 700 nm, the limit is 30 mJ. Other limits apply to other wavelengths and to ultrashort pulsed lasers. Protective eyewear is typically required where direct viewing of a class 3B laser beam may occur. Class-3B lasers must be equipped with a key switch and a safety interlock.
--- End quote ---

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