How old it is!

[Esteban]

Maybe there are more old.

[Esteban]

Other. First constructional laser project?

[Esteban]

Another early device.

[Esteban]

Giant photos!

[Esteban]

Tin cans detectable since 1937.

[Esteban]

Many years we use the wrong tube???

[Qiaozhi]

Other. First constructional laser project?

I prefer this one -> http://www.metacafe.com/w/756433

[Max]

Other. First constructional laser project?

Hi Esteban,
this seems interesting for an extreme DIY project... can you post the full article (or send me by mail) ?

Kind regards,
Max

[Esteban]

Hi Esteban,
this seems interesting for an extreme DIY project... can you post the full article (or send me by mail) ?

Kind regards,
Max

Hi

In wich email?

Regards

Esteban

[Esteban]

I prefer this one -> http://www.metacafe.com/w/756433

Qiaozhi:

Sorry, can't access!!

Regards

Esteban

[Elie]

I prefer this one -> http://www.metacafe.com/w/756433

DO NOT LOOK AT LASER WITH REMAINING EYE!
Seriously, this project is very dangerous. The laser pointers which are produced commercially are low power (although one should still not "get the beam in ones eye"), but what this guy shows will burn ones eye instantly. Lasers which are used in DVD players, etc., are high power devices, NOT TOYS.

[Elie]

Esteban's source:

http://blog.modernmechanix.com/

Esteban is a bad boy!

[Max]

Hi

In wich email?

Regards

Esteban

Hi,
my email is: snakeplissken2007@yahoo.com

Best regards,
Max

[Max]

LASER LIGHT = HI DANGER

DO NOT LOOK AT LASER WITH REMAINING EYE!
Seriously, this project is very dangerous. The laser pointers which are produced commercially are low power (although one should still not "get the beam in ones eye"), but what this guy shows will burn ones eye instantly. Lasers which are used in DVD players, etc., are high power devices, NOT TOYS.

Hi,
yes that's true... 250mW laser could burn one retina in few time... probably less than 0.1 seconds... the focus inside the eye will burn the most sensitive central area of retina in maybe half that time with such power.

Laser pointers (toys and stuff for conferences etc) are much smaller powered maximum 5mW so 50times less than this bad project...often they are under 1mW real power.

Watching at them could give damages too... but cause of small power it requires more time to make real damages to retina... that's a live tissue and could also partially regenerate a very small burnt.

SO FOR PEOPLE THAT WANT PLAY WITH THEM ANYWAY: BE REALLY CARE ON WHAT YOU DO...

The same apply for DIY or repair or mod of DVD/CD/burners/readers ... DO NOT PLAY WITH THEM IF YOU DON'T KNOW ABOUT POWER AND DAMAGES THAT LASERS CAN MAKE TO YOUR EYES.

My interest in the old article is just academic... cause I know about everything about how it works but wanna see e.g. strategy for growing the crystal and similar stuff with just homemade stuff... could be funny see that thing coming from the year 1964!

Kind regards,
Max

[Elie]

Come on, Max!

http://blog.modernmechanix.com/2006/05/01/build-your-own-laser/