Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > 445nm Lasers



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 09-08-2010, 11:09 PM #49
Class 2M Laser
 
Join Date: May 2009
Posts: 955
Rep Power: 1542
LSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond repute
LSRFAQ LSRFAQ is offline
Class 2M Laser
 
Join Date: May 2009
Posts: 955
Rep Power: 1542
LSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond reputeLSRFAQ has a reputation beyond repute
Default Re: Any 445 accidents yet?

Quote:
Originally Posted by plexus View Post
Water absorbs IR. from what i understand, eye tissue will absorb the IR and damage will occur on the surface and through tot he lens of the eye and not make it into the internal structure including the retina. From what i have read, to a point there will be no pain as your lens, cornea and perhaps iris are damaged but soon after there will be pain or at least discomfort, plus e deterioration of your sight as this happens. Ive read this in a few differrent places including I believe, sam's laser faq.
1.1 microns (1100 nm) and down hits the retina, 1.2-1.4u its a toss up, the energy splits between the cornea and retina. 1.4u and longer is adsorbed by the cornea, and you start seeing terms like "eye safe" rangefinders, eye safe meaning "I hope you like your new plastic replacement cornea and lens" Yes the cornea can withstand vast amounts of power, but it does burn/ablate like everything else biological, or laser corneal sculpting (Lasik) would not work.

Eye safe IR laser means, "the cornea can take quite a hit", but its still not 100% safe.

Steve



Last edited by LSRFAQ; 09-08-2010 at 11:12 PM.
LSRFAQ is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 09-09-2010, 04:43 AM #50
Member
 
Join Date: Jun 2010
Posts: 31
Rep Power: 0
electros will become famous soon enoughelectros will become famous soon enough
electros electros is offline
Member
 
Join Date: Jun 2010
Posts: 31
Rep Power: 0
electros will become famous soon enoughelectros will become famous soon enough
Default Re: Any 445 accidents yet?

Not gonna lie, I gave myself 10 or so floaters by looking at the dot on a white wall for a few seconds. All these people saying dot viewing is safe are wrong... I've been to the doctor and theres no retinal damage.

But I'm honestly not sure which is worse, as retinal damage you just subconsciously ignore after time, wheras floaters since they move around tend to be a constant nuisance since the brain can't learn to ignore them.

in a few situations, such as reading on a white computer monitor, or looking at the sky they get annoying, but otherwise they aren't really that bad.

I would seriously advise you do not look at the dot without goggles, period. It's not like your eyes are any more resistant than mine.
__________________
My lasers
In transit:
Wicked laser pulsar 200mw
1w spider 3 arctic g2
200mw wicked laser sonar

Current:
1w spider 3 arctic g1
200mw o-like waterproof
130mw CNI knockoff
40 mw unnamed
electros is offline   Reply With Quote
Old 09-09-2010, 03:59 PM #51
Class 2M Laser
 
Join Date: May 2007
Posts: 534
Rep Power: 13
Aseras is on a distinguished road
Aseras Aseras is offline
Class 2M Laser
 
Join Date: May 2007
Posts: 534
Rep Power: 13
Aseras is on a distinguished road
Default Re: Any 445 accidents yet?

Most of you are apparently fools, half blind already or just plain lucky. It take nothing to burn your eye.

How about this example ( saw it today ) The Body Odd - Teen's 'laser show' prank zaps eyeballs

Once you get over 400mw the dot itself is capable of burning your retina after viewing ( since most of you sit there and probably stare at it).

I have burned several camera CCD's myself. it doesn't take much. The glare or dot viewing slowly diminishes your vision you do not SEE it. things just look dimmer. you mostly notice it at night.

A direct hit gives you a blind spot, but even then your body is very good at hiding it.

you all need to be WAY more careful.
Aseras is offline   Reply With Quote
Old 09-09-2010, 04:05 PM #52
Eudaimonium's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Eudaimonium Eudaimonium is offline
Class 4 Laser
Eudaimonium's Avatar
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Default Re: Any 445 accidents yet?

Quote:
Originally Posted by Aseras View Post
Most of you are apparently fools, half blind already or just plain lucky. It take nothing to burn your eye.

How about this example ( saw it today ) The Body Odd - Teen's 'laser show' prank zaps eyeballs

Once you get over 400mw the dot itself is capable of burning your retina after viewing ( since most of you sit there and probably stare at it).

I have burned several camera CCD's myself. it doesn't take much. The glare or dot viewing slowly diminishes your vision you do not SEE it. things just look dimmer. you mostly notice it at night.

A direct hit gives you a blind spot, but even then your body is very good at hiding it.

you all need to be WAY more careful.
Yes we are all retarded fools with short therm memory loss every five seconds so we forget how laser dots look like so we stare at them for hours at the time with eyes wide open and jaw dropped.

Are you kidding me?!
__________________
Accepting and
^Click to enter^

The "Where to get laser components" big compilation thread!

Are you new and need help? Instead of starting new threads, shoot me a Personal Message! I'll answer all the beginner's and advanced questions you might have!

Eudaimonium is offline   Reply With Quote
Old 09-09-2010, 06:38 PM #53
DrSid's Avatar
Class 3R Laser
 
Join Date: Jul 2010
Location: Olomouc, Czech Republic
Posts: 1,516
Rep Power: 153
DrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond repute
DrSid DrSid is offline
Class 3R Laser
DrSid's Avatar
 
Join Date: Jul 2010
Location: Olomouc, Czech Republic
Posts: 1,516
Rep Power: 153
DrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond reputeDrSid has a reputation beyond repute
Default Re: Any 445 accidents yet?

Peace gentlemen .. everybody has right to burn his own eyes out. Still it's more fun with good eyes, just my $0.02.
__________________
200mw (35mw compared) FocalPrice cheap green AA - Review
500mw (estimated) 445nm Minimalistic Orange Emos Direct Drive. Thread
1500mw (estimated) 445nm Jayrob's Solarforce L2P. Review
DrSid is offline   Reply With Quote
Old 09-09-2010, 06:44 PM #54
Eudaimonium's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Eudaimonium Eudaimonium is offline
Class 4 Laser
Eudaimonium's Avatar
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Default Re: Any 445 accidents yet?

Quote:
Originally Posted by DrSid View Post
Peace gentlemen .. everybody has right to burn his own eyes out. Still it's more fun with good eyes, just my $0.02.
Well if he wants to, he deserves to.

Good point.

I just got very midly offended by the guy thinking we all stare at the dot on the wall. Yeah right.
__________________
Accepting and
^Click to enter^

The "Where to get laser components" big compilation thread!

Are you new and need help? Instead of starting new threads, shoot me a Personal Message! I'll answer all the beginner's and advanced questions you might have!

Eudaimonium is offline   Reply With Quote
Old 09-10-2010, 11:04 PM #55
r8nd0m's Avatar
Class 1 Laser
 
Join Date: Jun 2007
Posts: 86
Rep Power: 11
r8nd0m is on a distinguished road
r8nd0m r8nd0m is offline
Class 1 Laser
r8nd0m's Avatar
 
Join Date: Jun 2007
Posts: 86
Rep Power: 11
r8nd0m is on a distinguished road
Default Re: Any 445 accidents yet?

I don't think people are aware of the fluorescence hazard. Even if they have OD6 445nm goggles, if a powerful 445nm hits something and fluoresces to ~590nm the goggle's protection will be nearly non-existent.
__________________
Portable Laser:
~1000mW 445nm Wicked Lasers Arctic

Pen-Style Lasers:
400mW 980nm CNI
200mW 650nm Focus-Modded Pulsar

100mW 532nm Old WL Style
100mW 405nm CNI
r8nd0m is offline   Reply With Quote
Old 09-11-2010, 02:17 AM #56
benmwv's Avatar
Class 3R Laser
 
Join Date: Sep 2010
Location: wv
Posts: 1,389
Rep Power: 152
benmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond repute
benmwv benmwv is offline
Class 3R Laser
benmwv's Avatar
 
Join Date: Sep 2010
Location: wv
Posts: 1,389
Rep Power: 152
benmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond repute
Default Re: Any 445 accidents yet?

I think we will be safe from the flourescent hazard so long as we dont shine it at a highlighter tip


Math Fail:

Quote:
Originally Posted by Coherent Light View Post
Just My $0.2


horrible divergence on that pen
benmwv is offline   Reply With Quote
Old 09-11-2010, 02:44 AM #57
oic0's Avatar
Class 2 Laser
 
Join Date: Jun 2010
Posts: 289
Rep Power: 10
oic0 has a spectacular aura aboutoic0 has a spectacular aura about
oic0 oic0 is offline
Class 2 Laser
oic0's Avatar
 
Join Date: Jun 2010
Posts: 289
Rep Power: 10
oic0 has a spectacular aura aboutoic0 has a spectacular aura about
Default Re: Any 445 accidents yet?

Quote:
Originally Posted by electros View Post
Not gonna lie, I gave myself 10 or so floaters by looking at the dot on a white wall for a few seconds. All these people saying dot viewing is safe are wrong... I've been to the doctor and theres no retinal damage.

But I'm honestly not sure which is worse, as retinal damage you just subconsciously ignore after time, wheras floaters since they move around tend to be a constant nuisance since the brain can't learn to ignore them.

in a few situations, such as reading on a white computer monitor, or looking at the sky they get annoying, but otherwise they aren't really that bad.

I would seriously advise you do not look at the dot without goggles, period. It's not like your eyes are any more resistant than mine.
I dont think a laser can cause floaters as that is just crap floating around inside your eye. Everyone gets em as they age. Having a bad prescription makes them worse since they are more in focus for you. Mine drive me nuts since with -6.5/-7 they are in very good focus. If you sit still a while they will often settle somewhere. Your eyes will learn to somewhat ignore them too. Causes me some issues with a red dot gun sight, my eyes are so used to ignoring stray little anomolies It takes me a long time to find the dot unless its set to bright (which reduces accuracy). I have to use a holo sight with an actual reticle on my guns.
oic0 is offline   Reply With Quote
Old 09-11-2010, 03:09 AM #58
Cheech's Avatar
Class 2 Laser
 
Join Date: Mar 2010
Location: Fort Myers, Florida
Posts: 387
Rep Power: 25
Cheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant future
Cheech Cheech is offline
Class 2 Laser
Cheech's Avatar
 
Join Date: Mar 2010
Location: Fort Myers, Florida
Posts: 387
Rep Power: 25
Cheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant futureCheech has a brilliant future
Default Re: Any 445 accidents yet?

Quote:
Originally Posted by r8nd0m View Post
I don't think people are aware of the fluorescence hazard. Even if they have OD6 445nm goggles, if a powerful 445nm hits something and fluoresces to ~590nm the goggle's protection will be nearly non-existent.
I have a 1/2 pound bag of glow in the dark powder. Sometimes when I'm feeling like playing with some lasers I take a nice bit of the stuff and throw it on tables,floors,plants. Then use my 445 at 600ma to draw with... I never thought about your quote before but it makes sense. What would those wavelengths even be?
__________________
I got my lazer now where's my hoverboard?
30mw Kaleidoscope
PHR Purple Dragon Host pics
SF-AW210 Laser Gun pics
Red burner and PHR Graveyard
Trendnet 445 Labby pics
3-Mode mini 445 pics
Cheech is offline   Reply With Quote
Old 09-11-2010, 04:47 AM #59
benmwv's Avatar
Class 3R Laser
 
Join Date: Sep 2010
Location: wv
Posts: 1,389
Rep Power: 152
benmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond repute
benmwv benmwv is offline
Class 3R Laser
benmwv's Avatar
 
Join Date: Sep 2010
Location: wv
Posts: 1,389
Rep Power: 152
benmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond reputebenmwv has a reputation beyond repute
Default Re: Any 445 accidents yet?

Quote:
Originally Posted by Cheech View Post
I have a 1/2 pound bag of glow in the dark powder. Sometimes when I'm feeling like playing with some lasers I take a nice bit of the stuff and throw it on tables,floors,plants. Then use my 445 at 600ma to draw with... I never thought about your quote before but it makes sense. What would those wavelengths even be?
That would entirely depend on what color it looks like when it hits the powder but probably it a yellow-green in the mid to high 500's
benmwv is offline   Reply With Quote
Old 09-11-2010, 01:31 PM #60
r8nd0m's Avatar
Class 1 Laser
 
Join Date: Jun 2007
Posts: 86
Rep Power: 11
r8nd0m is on a distinguished road
r8nd0m r8nd0m is offline
Class 1 Laser
r8nd0m's Avatar
 
Join Date: Jun 2007
Posts: 86
Rep Power: 11
r8nd0m is on a distinguished road
Default Re: Any 445 accidents yet?

Quote:
Originally Posted by Cheech View Post
I have a 1/2 pound bag of glow in the dark powder. Sometimes when I'm feeling like playing with some lasers I take a nice bit of the stuff and throw it on tables,floors,plants. Then use my 445 at 600ma to draw with... I never thought about your quote before but it makes sense. What would those wavelengths even be?
You can pretty much estimate it based on the color of the re-emitted light. The light I was thinking of was yellow or orange light (around 580nm-620nm); which seems to be rather common for fluorescence.
__________________
Portable Laser:
~1000mW 445nm Wicked Lasers Arctic

Pen-Style Lasers:
400mW 980nm CNI
200mW 650nm Focus-Modded Pulsar

100mW 532nm Old WL Style
100mW 405nm CNI
r8nd0m is offline   Reply With Quote
Old 09-13-2010, 08:52 PM #61
Bluefan's Avatar
Class 3R Laser
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Bluefan Bluefan is offline
Class 3R Laser
Bluefan's Avatar
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Default Re: Any 445 accidents yet?

The fluorescence is by no means collimated, and definately lower in energy than the incoming beam, although some efficient fluorescence process may just provide huge amount of light when you put 1 watt in. You don't have to worry about a direct hit of the fluorescence, but do mind the huge amount light of very fluorescent sources.
Bluefan is offline   Reply With Quote
Old 09-13-2010, 10:10 PM #62
Asherz's Avatar
Class 3R Laser
 
Join Date: Jan 2009
Location: United Kingdom
Posts: 1,627
Rep Power: 64
Asherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond repute
Asherz Asherz is offline
Class 3R Laser
Asherz's Avatar
 
Join Date: Jan 2009
Location: United Kingdom
Posts: 1,627
Rep Power: 64
Asherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond reputeAsherz has a reputation beyond repute
Default Re: Any 445 accidents yet?

Whilst I agree with laser safety and all, and wearing goggles whilst burning or doing something else where the beam or dot is not required to be seen I agree with Eudaim, part of the fun of lasers is seeing the nice colour and the beam.

As long as it's for only short periods of time viewing a diffused reflection of a laser is fine as long as it's not ridiculously powerful, whilst 1W is a lot the amount of light entering your eye from a diffused reflection isn't going to cause any long term damage as long as your head isn't right next to it staring at it intensly.

I'm not recommending you do view it without goggles, but I sure as hell would find this hobby a lot more boring if I didn't. But if all these people preaching wear your goggles at all times do as they say, how do you know you've received a real 445nm?

I'm going to carry on enjoying my laser as I see fit.
__________________
- 150mW Ehgemus Mini-RPL Review -

Collection of the Best Free games

445nm Custom build@1A - Old style Dorcy Jr. + purple anodized heatsink
Dino Direct 50mW Flashlight unit
DX True green 100mW
O-like module @ 171mW in Mini-RPL host
Single-line Argon @ 52mW 488nm Peak
PHR-803T @ 110mA in Jayrob MXDL host
DX Red 660nm 200mW
Dragon lasers 190nm-548nm Safety Goggles
Asherz is offline   Reply With Quote
Old 09-13-2010, 10:38 PM #63
Bluefan's Avatar
Class 3R Laser
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Bluefan Bluefan is offline
Class 3R Laser
Bluefan's Avatar
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Default Re: Any 445 accidents yet?

A power meter and a spectrometer, that's how we know

I also take my goggles of every once and a while to admire the beam, but only when the laser is safety mounted somewhere, the dot either dumped in a beamdump or not that high power and the beampath free, far below eyelevel but parallel to the ground. That's why pointer are particularly dangerous, they easily point another way. Anything moving in the beam or any moving beam is a risk, so I nearly always have my goggles on.
Bluefan is offline   Reply With Quote
Old 09-15-2010, 05:23 AM #64
Member
 
Join Date: Aug 2010
Posts: 42
Rep Power: 0
FarewellToKings is on a distinguished road
FarewellToKings FarewellToKings is offline
Member
 
Join Date: Aug 2010
Posts: 42
Rep Power: 0
FarewellToKings is on a distinguished road
Default Re: Any 445 accidents yet?

I would like to see an experiment where someone takes a powerful laser of their choice, shines it on a white surface, and then uses a magnifying glass to focus the image of the dot on that surface onto a laser power meter to see if anything significant registers. Even if it did register, this would be far more energy than would be collected by the eye.

Plus, just think about the energy thresholds for retinal damage. Isnt something like >5mw entering a 7mm retina considered the dividing line between safe and dangerous? Even if the surface reflects 100% of the 1w in a diffuse pattern over 180 degrees in every direction, your pupil represents such a tiny percentage of total area at even 6 or 8 feet, that I find it really hard to believe that it absorbs enough energy to be acutely damaged, although the dangers of prolonged intense blue light should not be ignored.

Have you ever been hit in the eye with a <5mw laser? Not considered particularly dangerous, but still astoundingly bright. Orders of magnitude brighter than anything I have ever seen reflected from a wall. The only thing that has ever come close to looking like that is burning a white newspaper with my new 400mw blue Spartan. In this case, the beam was focused to a tiny point, and my goggles slipped down. It is definitely not something I would ever look at intentionally. Because I was only 8 or so inches away, I could see that being extremely dangerous.

These stories about getting floaters from looking at a laser dot from across the room, or not wanting to use your laser in any condition without goggles for fear of a bug flying into the beam 10 feet away seems to indicate a lot of ignorance when it comes to lasers. Safety is very important, but you need to have some common sense about it, or else you are not going to enjoy this hobby.

Last edited by FarewellToKings; 09-15-2010 at 04:59 PM.
FarewellToKings is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 09:26 AM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC