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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)
 





rocketparrotlet

rocketparrotlet

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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
 
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Montana64

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

Ted
 
pullbangdead

pullbangdead

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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.
 
rocketparrotlet

rocketparrotlet

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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
 
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treb76

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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.
 
pseudolobster

pseudolobster

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1x CD speed: 768kbps

1x DVD speed: 1.32mbps

1x BR speed: 36mbps

Hope that answers your question.
 
A

Ace82

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All great answers. :)

I thought, also dawned on me later that blu-ray disks are "layered" correct?
 
M

Montana64

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Ace82 said:
All great answers.  :)

I thought, also dawned on me later that blu-ray disks are "layered" correct?  
Click to expand...

DVDs are single and dual layered.

Ted
 
rocketparrotlet

rocketparrotlet

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Blu-ray discs have 4 layers. This was what I was trying to say when I said that they burn in deeper.

-Mark
 
D

D.S.Darkness

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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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