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will this burn a match ?






Moistenator

Moistenator

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Yeah, Probably not that well. If you're looking for something that will burn, Try a lower wavelength like 405nm or 445nm.
 
Gapouvable

Gapouvable

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Billiam said:
Yeah, Probably not that well. If you're looking for something that will burn, Try a lower wavelength like 405nm or 445nm.
Click to expand...

So you are saying that a Blue-Violet laser would be better for burning experiments? :thinking:

That's interesting, but does the power influe on the burning capacity of the laser?

Thank you! :thanks:
 
Cel

Cel

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You guys have a lot of reading to do.

Search first ask questions later!
 
Moistenator

Moistenator

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Gapouvable said:
So you are saying that a Blue-Violet laser would be better for burning experiments? :thinking:

That's interesting, but does the power influe on the burning capacity of the laser?

Thank you! :thanks:
Click to expand...

The lower the wavelength, The better it burns. But as Cel said, Do more searching and reading.
 
ApexProxy

ApexProxy

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You guys have missed quite a number of facts revolving around burn power of lasers. Since it has been a few days for you guys to read up I will give it to you in the hopes that I can clarify anything you may have read.

It isn't the wavelength itself that matters it is how that wavelength is absorbed by the material you are intending to burn. It just so happens that often the materials we try to burn absorb light approaching UV (405nm is closest to UV) the best.

Another point for burn power is the density of power. The more power you can focus into a smaller dot the more burn power you get. A 1W 405nm and a 1W 445nm focused to the same exact sized dot would burn almost identically in most cases.

A 1W 445nm focused to a dot of 1 square mm and a 2W 445nm focused to a dot of 2 square mm would burn differently though. The reason behind this is eventhough you are irradiating the material at the same power density one is burning twice the area resulting in a far more spectacular burn.

This is why, IMO, if you can get a 3W 445nm to a focus of 3x the area that of which you could get say a 1W 405nm you will be far more impressed by the 445nm burns simply because of the large amount of material that is burning.

So, in a nutshell, its not the wavelength that matters so much it is instead the power density of the dot you are trying to burn with that makes the biggest difference.

Smaller dot = better burn
 
Keiichi tsuchiya

Keiichi tsuchiya

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ApexProxy said:
You guys have missed quite a number of facts revolving around burn power of lasers. Since it has been a few days for you guys to read up I will give it to you in the hopes that I can clarify anything you may have read.

It isn't the wavelength itself that matters it is how that wavelength is absorbed by the material you are intending to burn. It just so happens that often the materials we try to burn absorb light approaching UV (405nm is closest to UV) the best.

Another point for burn power is the density of power. The more power you can focus into a smaller dot the more burn power you get. A 1W 405nm and a 1W 445nm focused to the same exact sized dot would burn almost identically in most cases.

A 1W 445nm focused to a dot of 1 square mm and a 2W 445nm focused to a dot of 2 square mm would burn differently though. The reason behind this is eventhough you are irradiating the material at the same power density one is burning twice the area resulting in a far more spectacular burn.

This is why, IMO, if you can get a 3W 445nm to a focus of 3x the area that of which you could get say a 1W 405nm you will be far more impressed by the 445nm burns simply because of the large amount of material that is burning.

So, in a nutshell, its not the wavelength that matters so much it is instead the power density of the dot you are trying to burn with that makes the biggest difference.

Smaller dot = better burn
Click to expand...

thanks apex! that was one kind of an answer :) :D
 
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