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leukoplast
Wicked Lasers God
Joined: 05 Dec 2006
Posts: 2272
Picture(s): 12
Location: California
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 Posted: 2/22/08, 6:17 AM Post subject: Violet las |
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I'm sure a lot of you are already aware of this, but this is news to me.
Until I saw this 405nm match lighting video and started asking questions, I had just assumed violet lasers had the same burning requirements as green lasers. By that I mean, usually you need a 50+mW green laser to even start thinking about lighting matches...and even that is pretty hard, or next to impossible. (generally speaking)
So after talking with the guy who made that laser, I found out that the laser is only 25mW. Immediately I couldn't believe it, but after it sunk in I realized that there is some truth in it. Think about it, its the whole reason why Blu-Ray/HD-DVD use violet lasers. And that reason being the 405nm is a much lower wavelength than most lasers we know (obviously) and how the Blu-Ray/HD-DVD players can read more off a regular old disk, is because the beam can actually be focused to a small point FAR more than a red laser, and at least 2x's more than a green laser.
This means that in order to get the burning power of a 120mW+ green laser, you only need about 60mW of violet laser (or less.) Which I think is great news! And I don't know how CW and pulsed play into this, maybe pulsed is incapable of burning at all, I dunno. But the guy in the video has a CW one. Which is supposedly a freak PS3 diode.
Yeah, just thought I'd share that for those who don't know. And somebody correct me if I am wrong, but I really think this is whats going on here. I will be getting a 10mW violet laser within the next 2 weeks, I will lasercheck it and hopefully its around 10mW or higher. If it is truly 10mW or more, that means its equivalent to a 20mW green laser, which means I should be able to pop a balloon with it properly focused. 
EDIT: Just want to make a long story short. A lower wavelength equals a smaller point the laser can be focused on. Which as we all know, means the power is more concentrated. And that = better burning power.
_________________
125mW Fusion - Divergence- 1.0 mRad | TEM00-TEM01* Doughnut mode | 119mW peak, 103 Nominal
55mW CNI - Laserchecked at 65mw peak, 55mw nominal | Divg -2.18 mRad |MIA! Lost!! FOUND!
15mW Evolution - 100mW Peak, 85mW Nominal(Holds +/- 5% over 2min) | Divg 1.0mRad
Has semi-adjustable power setting by tweaking battery cap: <5mW - Peak power.
Chromed P125 Pulsar - 152mW peak, 135mW nominal:
- Divg - Rechecked, and refocused. Now at 0.05mRad...Yes, 0.05!! 5.08mm at 73 feet: 4mm at app
400 Watt Fogger - Great fogger! Pumps out a lot! Fills room easily.
Listen to one of my songs - |Space Continuum.mp3| |Site| |Liquefied Light.mp3|
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MB4004
Elite Laser
Joined: 28 Sep 2007
Posts: 163
Picture(s): 1
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| Posted: 2/22/08, 9:01 PM Post subject: |
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| Thats good news. I will probably be buying getting a 15mW HD-DVD diode soon. I'll put it in an housing with a focusing lens so I can burn as much as possible. I would suggest making your own 405nm laser because they cost soooo much to buy. |
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leukoplast
Wicked Lasers God
Joined: 05 Dec 2006
Posts: 2272
Picture(s): 12
Location: California
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| Posted: 2/22/08, 9:43 PM Post subject: |
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Well, here at Wicked they do  But I got a 10mW pen-style for about $250, which I can accept. And Milos is also going to be making me a 10mW for about $160.
_________________
125mW Fusion - Divergence- 1.0 mRad | TEM00-TEM01* Doughnut mode | 119mW peak, 103 Nominal
55mW CNI - Laserchecked at 65mw peak, 55mw nominal | Divg -2.18 mRad |MIA! Lost!! FOUND!
15mW Evolution - 100mW Peak, 85mW Nominal(Holds +/- 5% over 2min) | Divg 1.0mRad
Has semi-adjustable power setting by tweaking battery cap: <5mW - Peak power.
Chromed P125 Pulsar - 152mW peak, 135mW nominal:
- Divg - Rechecked, and refocused. Now at 0.05mRad...Yes, 0.05!! 5.08mm at 73 feet: 4mm at app
400 Watt Fogger - Great fogger! Pumps out a lot! Fills room easily.
Listen to one of my songs - |Space Continuum.mp3| |Site| |Liquefied Light.mp3|
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MB4004
Elite Laser
Joined: 28 Sep 2007
Posts: 163
Picture(s): 1
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| Posted: 2/23/08, 9:36 AM Post subject: |
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| Oh ya, that guys lasers are really nicely made. He offered me one too. |
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leukoplast
Wicked Lasers God
Joined: 05 Dec 2006
Posts: 2272
Picture(s): 12
Location: California
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| Posted: 2/23/08, 10:17 AM Post subject: |
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They are very nice. Easily accessible focus lens, adjustable power output. And has a good design which is also small and compact. And you can't beat the price.
I just cant wait till some Blu-Ray burner diodes start hitting the DIY market, cause if he is still making lasers, I would buy a burner violet from him in a heartbeat.
_________________
125mW Fusion - Divergence- 1.0 mRad | TEM00-TEM01* Doughnut mode | 119mW peak, 103 Nominal
55mW CNI - Laserchecked at 65mw peak, 55mw nominal | Divg -2.18 mRad |MIA! Lost!! FOUND!
15mW Evolution - 100mW Peak, 85mW Nominal(Holds +/- 5% over 2min) | Divg 1.0mRad
Has semi-adjustable power setting by tweaking battery cap: <5mW - Peak power.
Chromed P125 Pulsar - 152mW peak, 135mW nominal:
- Divg - Rechecked, and refocused. Now at 0.05mRad...Yes, 0.05!! 5.08mm at 73 feet: 4mm at app
400 Watt Fogger - Great fogger! Pumps out a lot! Fills room easily.
Listen to one of my songs - |Space Continuum.mp3| |Site| |Liquefied Light.mp3|
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Crossfire
Elite Laser
Joined: 01 May 2007
Posts: 144
Location: South Florida
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| Posted: 3/14/08, 3:53 PM Post subject: |
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With a 10x jeweler's loupe, I am able to smoke leather with my Milos-built 11.6mW blu-ray. That's bang for the buck...erm...milliwatt. It's focusable too, but I like my photons collimated.  |
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AuroraAlpha
Wicked Lasers Master
Joined: 07 Oct 2005
Posts: 763
Picture(s): 55
Movie(s): 4
Location: North Chicago
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| Posted: 4/26/08, 10:32 PM Post subject: Re: Violet |
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| leukoplast wrote: |
| And somebody correct me if I am wrong, but I really think this is whats going on here. |
Your wrong.
50mW of any wavelength has the same power as 50mW of any other wavelength.
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To some extent smaller wavelengths can be focused better, but this is much more important for a green vs. far IR where there is a large difference of 9500+ nm.
Blu-Ray laser is violet operating at 405nm, 532nm is the standard green.
Let’s look at the difference in area of the beam:
405: A=(pi)r^2=(pi)202.5^2=(pi)41006.25
532: A=(pi)r^2=(pi)266.5^2=(pi)70756
Therefore the 405nm is at single wavelength across 58% of the area that a 542nm requires. And therefor has a ~40% better power density.
This really isn't coming into play since most people can't even hope to ever focus at this level, but its theory and fun at that level. 
Also you CAN light matches with 30mW green lasers, it just not as reliable as strong lasers and you have to use external optics to align it with very strong focusing on the match in the correct place (at the beginning of the crown).
_________________
Green: 5mW Core + 35mW Executive + ''''130mW'''' (86.28mW tested) EnVee
Blue: ''''50mW'''' (64.79mW tested) Blue Lab Laser (TEC head + Current controlled PSU
Sonar Case (Color TBD)
Wicked Lasers Optic Set
Wicked Lasers Optic Set + Cap Set |
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HumanSymphony
Fusion Laser
Joined: 21 Aug 2006
Posts: 320
Location: Bellingham, WA
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| Posted: 4/27/08, 10:56 PM Post subject: Re: Violet |
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| AuroraAlpha wrote: |
| leukoplast wrote: |
| And somebody correct me if I am wrong, but I really think this is whats going on here. |
Your wrong.
50mW of any wavelength has the same power as 50mW of any other wavelength.
---------------------------------------------------------------------- --
To some extent smaller wavelengths can be focused better, but this is much more important for a green vs. far IR where there is a large difference of 9500+ nm.
Blu-Ray laser is violet operating at 405nm, 532nm is the standard green.
Let’s look at the difference in area of the beam:
405: A=(pi)r^2=(pi)202.5^2=(pi)41006.25
532: A=(pi)r^2=(pi)266.5^2=(pi)70756
Therefore the 405nm is at single wavelength across 58% of the area that a 542nm requires. And therefor has a ~40% better power density.
This really isn't coming into play since most people can't even hope to ever focus at this level, but its theory and fun at that level.
Also you CAN light matches with 30mW green lasers, it just not as reliable as strong lasers and you have to use external optics to align it with very strong focusing on the match in the correct place (at the beginning of the crown). |
indeed. like i've said before about this particular subject, a single color will absorb well into any other color but itself (exact/similar wavelength). of course in this case it's just the 405nm being able to be focused better; nothing to do with it's actual color.
_________________
Nexus >114mW (probably the best Nexus known to man)*SOLD*
CORE (broke  )
3 homemade 140mW 650nm *SOLD*
200mW 650nm red MONSTER!  lights cigarette <10 secs.
Contemplating building 10mW 405nm Blu Ray |
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Athoul
Wicked Lasers God
Joined: 13 Sep 2005
Posts: 7532
Location: Canada
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TrojanPastries
25mW Classic Wicked Laser
Joined: 13 May 2008
Posts: 31
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| Posted: 5/14/08, 12:51 AM Post subject: |
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| MB4004 wrote: |
| Thats good news. I will probably be buying getting a 15mW HD-DVD diode soon. I'll put it in an housing with a focusing lens so I can burn as much as possible. I would suggest making your own 405nm laser because they cost soooo much to buy. |
well a parts place was selling 105mW 405nm diodes for upwards of $1000.
or you could buy a blu-ray burner for ~$350. but then you have to build your own driver board, get your own optics, and make your own housing to hold the whole works together with the power supply. still do-able though. now if i could figure out a solution to the expensive-ness of the 473nm blue diodes, i'd be happy. 
_________________
\"I have astigmatism. My optometrist says it comes from years of doing stand-up comedy and
staring into the bright lights. He says he can fix it though, with laser surgery. I said oh
yeah, what are you gonna do? He said well, Im going to shine this light in your eye...\"
--Jeremy Hotz |
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Overmind
Elite Laser
Joined: 24 Jun 2007
Posts: 140
Location: Classified
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| Posted: 6/14/08, 9:00 AM Post subject: |
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Maybe wicked lasers should start building violet lasers.
_________________
I am the Universe. Resistance is Futile. The Truth is classified. |
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Yobresal
Fusion Laser
Joined: 05 Aug 2005
Posts: 308
Movie(s): 1
Location: San Francisco, Ca.
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Bluefan
Fusion Laser
Joined: 20 Apr 2008
Posts: 283
Movie(s): 1
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| Posted: 6/24/08, 10:11 AM Post subject: |
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| Yobresal wrote: |
http://www.youtube.com/watch?v=KSHvzVvlFqU
Here is my new blu-ray. 180mW of power. I only spent $45 on parts. |
Where did you get those parts? $45 is very cheap for 180mw. |
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Yobresal
Fusion Laser
Joined: 05 Aug 2005
Posts: 308
Movie(s): 1
Location: San Francisco, Ca.
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| Posted: 6/27/08, 2:29 AM Post subject: |
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| I purchased a custom made laser diode driver for $20 from a private seller, I harvested the PHR-803T laser diode from a refurbished 2.5X HD-DVD drive, and I used an old remote control as the host. |
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Bluefan
Fusion Laser
Joined: 20 Apr 2008
Posts: 283
Movie(s): 1
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| Posted: 6/27/08, 12:56 PM Post subject: |
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| I take it you took the diode from a HD-DVD burner instead of reader? else, it would never be that powerfull. |
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