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FrozenGate by Avery

405nm vs 650nm Burning?

A

Ace82

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How come, it takes a ~200mW 650nm open can laser to burn 22x, and ~400mW of 405nm closed can to burn 12x? We all know that blu-ray burns much more efficiently then red as well. :-? Why can't a PHR do more then 12X at ~80mW, since it burns basically the same or better then ~150mW red? Is it the material used on the disk?

(~ means more or less, or guestimate if you will, plus, I've never actually looked at blu-ray disk ;D)
 





This is because the blu-ray disk is burned into much deeper than a normal DVD. Matter of fact, this is why blu-ray diodes were developed in the first place; standard red diodes are unable to burn holes this deeply. Blu-ray discs can hold so much information because of this.

Sorry if that was hard to understand; I'm not feeling very coherent right now.

-Mark
 
Blu-Rays are burning much more information on the disk than a DVD writer. You can not compare write speeds between different formats.

Ted
 
It's about absorption. Violet burns better when it absorbs better. The materials on the disc are engineered to absorb at a very high level for whatever color light is used. So DVDs absorb red light just as well as Blu-ray discs absorb violet light. When burning other things like with pointers, though, the absorption is very often better with violet than it is with red.
 
Yeah, I can light white matches as quickly as I can light black matches (immediately). Sharpie-ing things doesn't seem to do much with blu-ray. Which is nice. It can burn just about anything.

-Mark
 
I've accidentally burned my white cabinets at my place w/ my bluray @ 110mA. Bugs burn pretty well- more specifically, scorpions + they glow under blacklights so two thumbs up.
 
1x CD speed: 768kbps

1x DVD speed: 1.32mbps

1x BR speed: 36mbps

Hope that answers your question.
 
All great answers. :)

I thought, also dawned on me later that blu-ray disks are "layered" correct?
 
Blu-ray discs have 4 layers. This was what I was trying to say when I said that they burn in deeper.

-Mark
 
ok, i havent seen this on here yet, soo, BR also can be focused much smaller and sharper than Red so, you can fit much more burn marks on a disk with the same amount of layers as you could a dvd, therefore increasing the amount of data stored on blu ray vs DvD.


-- side note, whats the distance you guys are burning from your laser with, with mine its only a matter of inches to a foot, not much :/
im runnin about 130 mA, so its plenty of power, but even focused to a pin point i can only sorta smoke that one little spot.
 
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