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which one should i buy?

M

massimog91

Guest
hello i would like to buy a powerful laser,which one do you suggest?
TANK 445nm - 1.2W Adjustable Focuse Blue Laser Pointer

or

Tactical Real 1W 445nm Blue laser torch /waterproof /focusable [OL-445-T-1.0] - $139.99 : Zen Cart!, The Art of E-commerce

also which one are the better goggles?

OpticPro - Full Angle Protection Laser Safety Goggles for 532nm/445nm Laser

405nm,450nm,473nm,532nm laser safety goggles [OLGLG532] - $19.99 : Zen Cart!, The Art of E-commerce

or this

405nm,445nm,808nm,1064nm safety goggles/200-450,740-2000nm [OLLS1064] - $45.99 : Zen Cart!, The Art of E-commerce

thank you in advance.
 





InfinitusEquitas

InfinitusEquitas

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Mar 27, 2011
Messages
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Good point, a build from here would be by far the best option.

I was only thinking of the lasers linked to.
 
M

massimog91

Guest
ok thanks to both of you, i pmed him...
btw i need the laser dot to be like half inch or a bit bigger of diameter...
do you understand?
sorry for my english, im italian...
 
M

massimog91

Guest
actually i would like the laser to be very powerful with a dot of half inch to 1inch.....is it possible or i must focus the beam in a very tiny dot to have a powerful laser?
again sorry for my english
 
jeffreythe00

jeffreythe00

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Jan 13, 2010
Messages
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massimog91 said:
what is the standard diameter of the dot?
if i focus it in a inch will the the beam be stronger?
i hope you get what im trying to say..
ty
Click to expand...

The laser will be 1W at 1 inch or 1cm. It doesn't increase in power at all. What focusing does is increase the power density at the focal point. The tighter the beam is focused the higher the power density.

Edit: For example. The sun will not set you on fire instantaneously but when you take a magnifying glass and focus the sunlight down. The smaller you get the dot. The higher the power density.
 
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K

kaunak

0
Joined
Mar 29, 2008
Messages
212
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18
Nearly all of these high power blue lasers have a rectangular "dot" and pretty bad divergence. If you want to burn stuff you will have to be within a few feet and you ave to focus the dot down small for maximum burning :) the closer you are the smaller the dot will go and you can get less than a 500 micron dot with a good axiz lens
 
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