20mw bluray pen at 34.43$ focalprice

[john_lawson]

yea its in the reviews here it was 50 mw yes worth it i think takes 2 aaa batts gr5eat divergence i give it an 7.5


here http://laserpointerforums.com/f52/focal-price-405-nm-20mw-bluray-pen-unit-42521.html

 

[daguin]

Lower powered violet lasers are MUCH BETTER for flourescing stuff. My "working" violet for fluoresence is 11mW. Yes, I also have a >500mW violet (and a few others). Which one do you think gets used more the 11mW or the >500mW?

Also, you don't need 500mW to burn stuff. This link is to a video of one of my 35mW (lecture pointer) violet modules

35mWMatchLight.flv video by imdguin - Photobucket

Peace,
dave

 

[realista]

35mw lighted a match???... wow. it should be VERY WELL focused.... buyi thought that to burn.. there should be more than 50mw.. starting from 70mw about

 

[daguin]

35mw lighted a match???... wow. it should be VERY WELL focused.... buyi thought that to burn.. there should be more than 50mw.. starting from 70mw about

Most people do not actually get their violet lasers focused well. The dot is tiny when focused correctly. Without good goggles, the "blaze" from the dot prevents one from seeing it well enought to get it to its smallest. Then with the very small dot it is difficult to hold the spot steadily in one position.

Peace,
dave

 

[Ash]

...edit...
Then with the very small dot it is difficult to hold the spot steadily in one position.

Peace,
dave

This is exactly why I usually use a tiny tripod and holder
(found here: DealExtreme: $1.49 Mini 4-inch Metal Tripod and DealExtreme: $2.71 Universal Clamp Mount for Tripods (Holds up to 3.8cm Thick Objects) )
when burning.
It makes it much easier.

And, of course safety goggles.