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Questions about Lasers

alveos

alveos

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Jul 6, 2014
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Hello Guys,
I am new here. I dont need any professional lasers. I just want the green one and blue one with visible beams. I bought a "blue" laser a month ago but its 405nm and its violet. I want to buy a green one with bright visible beam, and not more than 30$. I found few ones on ebay:

Laser 1
Laser 2
Laser 3
Laser 4
Laser 5
Laser 6
Laser 7
Laser 8


Blue Laser 1
Blue Laser 2

Also let me know what batteries are better to power a laser: 18650 or 16340?

For me the best blue colors are 473 and 488nm ;) But they are expensive ;(
 
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Buying a green laser off ebay should be fine because you don't need much power out of one to get a visible beam at night, and they tend to be around 30mW-50mW or even up to 80mW. For a green laser you'll need one 18650 battery. Or if the host is smaller, then one 16340 battery. (only one 3.7V battery)
I can't really say much about the blue lasers you listed. I recommend going to laserbtb, o-like, or the B/S/T section here at the forum if you're looking for a blue laser on a budget. If you have lots of cash to shed, go to Laserglow or Optotronics especially if you're looking for 473nm.
 
Thanks for quick reply ;) Let me know if better are focusable lasers or normal ones? Which one will you recoment from the list that i show (green one)? Can i find cheaper blue one with visible beam at night that 70$? Show me link.
 
if you are only going to point it in the sky and Not do any burning, then you don't need a focusable one. As far as choosing a green laser off ebay, it comes done to luck whether you'll get a good one or not. For a blue laser I recommend a single mode blue. This will be slightly closer to the lighter blue that you like and it around $70. It is the bottom one listed in this link called "450nm 100mW single mode (FDA)"
 
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