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 > Safety & Legal Issues



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



Reply
 
LinkBack Thread Tools Display Modes
Old 03-02-2012, 06:52 PM #1
Junior Member
 
Join Date: Mar 2012
Posts: 18
Rep Power: 0
Forestman is on a distinguished road
Forestman Forestman is offline
Junior Member
 
Join Date: Mar 2012
Posts: 18
Rep Power: 0
Forestman is on a distinguished road
Default Class 4 Laser Safety

Hey guys,

I am fairly new to lasers and am still learning about how to be safe with them.

At my college I am working with a team on a project where we are using a Class 4 laser.

My teammates think that the reflection from a Class 4 is not dangerous, however I disagree from what I have read and feel very uncomfortable with their actions.

Today, they were testing the laser and there were a few moments where I saw the reflected beam for nothing more than a second or two. This in and of itself raises concern.

How do I know if there is any damage to my eye from the reflected beam?

I'm not sure if it was a matte surface or a reflective surface. I didn't stare at it to find out.

Any help and insight is greatly appreciated. I care about my eyes and I don't want dummies at school ruining them.

Thanks again


Forestman is offline   Reply With Quote







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







Old 03-02-2012, 08:19 PM #2
Sigurthr's Avatar
Class 3B Laser
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Sigurthr Sigurthr is offline
Class 3B Laser
Sigurthr's Avatar
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Default Re: Class 4 Laser Safety

Where was the professor/instructor during all this? I would imagine a safety officer would need to be present when a dangerous laser is to be used by students.

Only a doctor can tell if there is damage done after the fact. We can only tell you if there is damage if it is blatantly obvious. If you see afterimages or color bleaching or spots or blurry sections or wave sections or anything else liek that go see a doctor, major damage has been done. only the first two symptoms I listed will heal and they may take quite some time.

There's plenty of posts and threads about laser safety on the forum, heck I wrote one that got stickied. Do some reading and shield your eyes from idiots with lasers.
__________________
Amateur Multispectral Photographer - [X-Ray, UV, Vis, IR]
Amateur Electrical Engineer
Autodidact
Tesla Coil Expert
Sigurthr is offline   Reply With Quote
Old 03-02-2012, 08:32 PM #3
Banned
 
Join Date: Jan 2009
Location: In A State of Shock.
Posts: 11,871
Rep Power: 0
Tech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond repute
Tech_Junkie Tech_Junkie is offline
Banned
 
Join Date: Jan 2009
Location: In A State of Shock.
Posts: 11,871
Rep Power: 0
Tech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond reputeTech_Junkie has a reputation beyond repute
Default Re: Class 4 Laser Safety

Depends on wavelength too. What type of laser was it?
Tech_Junkie is offline   Reply With Quote
Old 03-02-2012, 09:26 PM #4
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: Class 4 Laser Safety

To give an accurate answer the laser type, power and surfaces involed are important.

Was the laser between 400 and 700nm?
Yes
Quote:
Did you see a very bright flash and after images?
Yes
Quote:
Do you still have weird parts in your vision?
Yes:
Quote:
Damage has been done, go see an eye doctor immediately
No:
Quote:
I'd say just to be sure check with an eye doctor. Hold the college responsible for the costs if they haven't given safety instruction. If they did hold you teammates responsible, they should know better in any case.
No:
Quote:
You're fine, if you're hit with a class 4 visible laser you see more than just a dot that dissapears quite fast.
No:
Quote:
There is no way to be sure what happened. I'd say just to be sure check with an eye doctor. Hold the college responsible for the costs if they haven't given safety instruction. If they did hold you teammates responsible, they should know better in any case.
A LOT depends on the material the laser was shining on, if it was a white piece of paper there is most likely no damage at all. Shiny surfaces are definitely very dangerous.

In any case, class 4 lasers demand a LOT of respect, report this to the college immediately as this is unacceptable behaviour.
__________________
Highlights of my laser collection:
Big Sky Er:YAG - HP 8168D 1480-1570nm tunable laser source - Spectra Physics 3800 modelocked Nd:YAG - lots of IR diodes and bars - LPC-815 200mW 650nm - DL 6353TL 635nm 5mW - HP5501A stabilized HeNe - 2x Melles Griot 05-STP-910 stabilized HeNe - Spectra Physics 3500 Dye laser - REO 30536 543nm 2mW - Coherent DPY315-100 532nm 100mW SLM DPSS - Lexel 85 - 3x B&W tek 10mW 473nm - 445nm 3W Bluefan Sabre module - SF-AW210 150mW 405nm - DPSS inc 355nm 100mW Q-switched

Power meters:
Laser precision RkP-575 w/ RK-5710 - Ophir 10A-V2-SH - Ophir OEM 20C-A - HP 8152A w/ 2x 81521B - Coherent 212 - Anritsu ML93 w/ MA98A - 2x laser precision AM-400 - Leader LPM-8000

Bluefan is offline   Reply With Quote
Old 03-02-2012, 11:40 PM #5
Junior Member
 
Join Date: Mar 2012
Posts: 18
Rep Power: 0
Forestman is on a distinguished road
Forestman Forestman is offline
Junior Member
 
Join Date: Mar 2012
Posts: 18
Rep Power: 0
Forestman is on a distinguished road
Default Re: Class 4 Laser Safety

Good news guys,

I just visited the eye doctor and he took images of my retinas to verify that there was no damage.

Lucky for me the eye doctor verified and assured that I have no damage in either eye.

My teammates are not very smart and I need to have a serious chat with them. Apparently the one member on our team who is in charge of the Class 4 laser doesn't believe that diffuse or reflection of the beam can cause harm.

To make things even more scary, he is using reflective tape to try and make the laser more detectable by a photo diode. This is what raised a lot of my concern since he was using reflective tape!

After I was exposed a few times I immediately developed a headache. Thus, I went to the eye doctor out of concern for my own eyes!

Again, I am happy to say I'm in the clear according to the eye doctor. Thank goodness too! This is scary stuff guys.

I really hope I don't have to deal with something like this again. In fact it scares me people can even own these kind of lasers. It should be illegal for idiots to operate these kind of lasers.

As for the wavelength in nm... I'm not sure. I just know it's a 1000 mW laser and was being used to shine at reflective tape.

To be honest I'm scared to be around my team now... My teammates didn't seem to believe there was danger either. I'm afraid they will do it again!

Last edited by Forestman; 03-03-2012 at 12:33 AM.
Forestman is offline   Reply With Quote
Old 03-02-2012, 11:47 PM #6
Woodofcville's Avatar
Class 3R Laser
 
Join Date: Oct 2009
Location: Tulsa, Oklahoma
Posts: 1,191
Rep Power: 57
Woodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond repute
Woodofcville Woodofcville is online now
Class 3R Laser
Woodofcville's Avatar
 
Join Date: Oct 2009
Location: Tulsa, Oklahoma
Posts: 1,191
Rep Power: 57
Woodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond reputeWoodofcville has a reputation beyond repute
Default Re: Class 4 Laser Safety

Quote:
Originally Posted by Forestman View Post
They should be against the law!
__________________
_~Cale

-~10mW Focusable O-Like (405nm)
-~60mW CNI Clone (405nm)
-~1W Spyder III, Arctic Series (445nm)
-~5mW Radioshack Pointer (532nm)
-~55mW Viper (532nm)
-~200mW Skylasers Portable (532nm)
-~5mW Atlasnova (635nm)
-~200mW New Style Dilda (650nm)
-~5mW DX pointer (650nm)
Woodofcville is online now   Reply With Quote
Old 03-03-2012, 12:23 AM #7
Sigurthr's Avatar
Class 3B Laser
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Sigurthr Sigurthr is offline
Class 3B Laser
Sigurthr's Avatar
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Default Re: Class 4 Laser Safety

Quote:
Originally Posted by Forestman View Post
In fact it scares me idiots can even own these kind of lasers. They (idiots) should be against the law!
Fixed for you.

Anything can be dangerous in the hands of an idiot. No reason to make lasers illegal, just make sure idiots can't get their hands on them is all.
__________________
Amateur Multispectral Photographer - [X-Ray, UV, Vis, IR]
Amateur Electrical Engineer
Autodidact
Tesla Coil Expert
Sigurthr is offline   Reply With Quote
Old 03-03-2012, 12:24 AM #8
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: Class 4 Laser Safety

Quote:
Originally Posted by Forestman View Post
Good news guys,

I just visited the eye doctor and he took images of my retinas to verify that there was no damage.

Lucky for me the eye doctor verified and assured that I have no damage in either eye.

My teammates are not very smart and I need to have a serious chat with them. Apparently the one member on our team who is in charge of the Class 4 laser doesn't believe that diffuse or reflection of the beam can cause harm.

To make things even more scary, he is using reflective tape to try and make the laser more detectable by a photo diode. This is what raised a lot of my concern since he was using reflective tape!

After I was exposed a few times I immediately developed a headache. Thus, I went to the eye doctor out of concern for my own eyes!

Again, I am happy to say I'm in the clear according to the eye doctor. Thank goodness too! This is scary stuff guys.

I really hope I don't have to deal with something like this again. In fact it scares me people can even own these kind of lasers. They should be against the law!

As for the wavelength in nm... I'm not sure. I just know it's a 1000 mW laser and was being used to shine at reflective tape.

To be honest I'm scared to be around my team now... My teammates didn't seem to believe there was danger either. I'm afraid they will do it again!
Good to hear you are ok! Class 4 is 500mW (for CW lasers) and beyond, that's the highest class.

My advice: wear appropriate laser safety eyewear, that should protect you in case of a direct hit. Be REALLY careful when working with such a powerful laser, even a direct reflection of a photodiode could burn stuff and certainly burn a retina. That AND laser safety eyewear of course. The college should be able to provide them. Here in the Netherlands any class 3b laser (and thus certainly a class 4) should be behind a door with warning lights and some sort of lock or interlock system.

The other option is not to be in the same room as the laser. I wouldn't take chances with a powerful laser. If you really want to have fun you can report the college to the regulating agencies, it sounds like the college isn't take care of the safety of the students.
__________________
Highlights of my laser collection:
Big Sky Er:YAG - HP 8168D 1480-1570nm tunable laser source - Spectra Physics 3800 modelocked Nd:YAG - lots of IR diodes and bars - LPC-815 200mW 650nm - DL 6353TL 635nm 5mW - HP5501A stabilized HeNe - 2x Melles Griot 05-STP-910 stabilized HeNe - Spectra Physics 3500 Dye laser - REO 30536 543nm 2mW - Coherent DPY315-100 532nm 100mW SLM DPSS - Lexel 85 - 3x B&W tek 10mW 473nm - 445nm 3W Bluefan Sabre module - SF-AW210 150mW 405nm - DPSS inc 355nm 100mW Q-switched

Power meters:
Laser precision RkP-575 w/ RK-5710 - Ophir 10A-V2-SH - Ophir OEM 20C-A - HP 8152A w/ 2x 81521B - Coherent 212 - Anritsu ML93 w/ MA98A - 2x laser precision AM-400 - Leader LPM-8000

Bluefan is offline   Reply With Quote
Old 03-03-2012, 02:43 AM #9
geekypyro21's Avatar
Class 1 Laser
 
Join Date: Jun 2011
Location: Kansas
Posts: 68
Rep Power: 7
geekypyro21 is on a distinguished road
geekypyro21 geekypyro21 is offline
Class 1 Laser
geekypyro21's Avatar
 
Join Date: Jun 2011
Location: Kansas
Posts: 68
Rep Power: 7
geekypyro21 is on a distinguished road
Default Re: Class 4 Laser Safety

Ya, I agree with Bluefan. But personally I would just buy my own pair of safety glasses and encourage my class mates to buy some as well.
__________________
geekypyro21 is offline   Reply With Quote
Old 03-03-2012, 09:00 PM #10
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 online now
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: Class 4 Laser Safety

For the origional poster.. Where is your prof and the laser safety officer? The call is NOT made by your group mates, its made by the Prof and the LSO, or a postdoc. Occupational safety and health is their perview. The fact that you had to come on line to seek advice worries me. I've made a career of working with industral and university lasers, as well as laser shows. Something is wrong if you were not briefed correctly prior to entry of the laser lab.


Join Linked-In, find the laser safety professionals group. Ask questions.
This is not for everyone, as most hobby laser questions can be answered here. At a college, odds are, this it is a pulsed laser that is well beyound the scope of this site. The linked in group can answer detailed questions about fast pulsed lasers.

The only way to find out if a laser exposure is dangerous is to measure. There is no guessing, and even if it is outside the range of corneal transmission, that just means the cornea gets damaged instead of the reina.

Try to find one of the more recent laser safety books by Dr. David Sliney.



Steve

Last edited by LSRFAQ; 03-03-2012 at 09:04 PM.
LSRFAQ is online now   Reply With Quote
Old 03-03-2012, 09:01 PM #11
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 online now
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: Class 4 Laser Safety

Quote:
Originally Posted by geekypyro21 View Post
Ya, I agree with Bluefan. But personally I would just buy my own pair of safety glasses and encourage my class mates to buy some as well.
If he works in a workplace or educational environment, is the responsibility of his employer to buy protective gear. It sets a slippery slope to expect a student to pay for a 400$ pair of OSHA approved goggles.

Steve
LSRFAQ is online now   Reply With Quote
Old 03-05-2012, 01:54 AM #12
The Grand Pooh Bah's Avatar
Member
 
Join Date: Feb 2012
Posts: 35
Rep Power: 0
The Grand Pooh Bah is on a distinguished road
The Grand Pooh Bah The Grand Pooh Bah is offline
Member
The Grand Pooh Bah's Avatar
 
Join Date: Feb 2012
Posts: 35
Rep Power: 0
The Grand Pooh Bah is on a distinguished road
Default Re: Class 4 Laser Safety

What country is he in? Maybe they don't have any rules, laws or guidelines at the school he is attending. You need to find out more info on the laser and get some goggles to protect yourself. They might even have them available at your school. You need to talk to your professor about your concerns and if he doesn't deal with it satisfactorily go to the dean.
The Grand Pooh Bah is offline   Reply With Quote
Old 04-11-2012, 06:50 PM #13
Junior Member
 
Join Date: Mar 2012
Posts: 18
Rep Power: 0
Forestman is on a distinguished road
Forestman Forestman is offline
Junior Member
 
Join Date: Mar 2012
Posts: 18
Rep Power: 0
Forestman is on a distinguished road
Default Re: Class 4 Laser Safety

I want to thank you all for your information and replying.

I have one more question concerning the Class 4 Laser.

It has the ability to turn down the power, which was done to do a short presentation with the project it was being integrated with. The power was turned down to about 50 mW and was being shined onto a surface that diffused the laser beam.

So my question is, can the 50 mW laser cause retinal damage from a diffuse reflection?

Thanks again for the help!
Forestman is offline   Reply With Quote
Old 04-11-2012, 06:53 PM #14
InfinitusEquitas's Avatar
Class 4 Laser
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,010
Rep Power: 11607
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
InfinitusEquitas InfinitusEquitas is online now
Class 4 Laser
InfinitusEquitas's Avatar
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,010
Rep Power: 11607
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
Default Re: Class 4 Laser Safety

From a diffuse reflection, no.
InfinitusEquitas is online now   Reply With Quote
Old 04-11-2012, 06:55 PM #15
Junior Member
 
Join Date: Mar 2012
Posts: 18
Rep Power: 0
Forestman is on a distinguished road
Forestman Forestman is offline
Junior Member
 
Join Date: Mar 2012
Posts: 18
Rep Power: 0
Forestman is on a distinguished road
Default Re: Class 4 Laser Safety

Quote:
Originally Posted by InfinitusEquitas View Post
From a diffuse reflection, no.
Wow thanks for the quick reply!

Glad to know all is well then. There were a lot of eyes looking at it.

Just out of curiosity, what power would be required to cause danger with diffused reflection?

Last edited by Forestman; 04-11-2012 at 06:58 PM.
Forestman is offline   Reply With Quote
Old 04-11-2012, 07:07 PM #16
InfinitusEquitas's Avatar
Class 4 Laser
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,010
Rep Power: 11607
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
InfinitusEquitas InfinitusEquitas is online now
Class 4 Laser
InfinitusEquitas's Avatar
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,010
Rep Power: 11607
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
Default Re: Class 4 Laser Safety

Impossible to answer that question. It would depend on the material the the laser beam is terminating on.

Personally I haven't been able to get either of my LPM's to register a diffuse reflection off of common household stuff that's matte from further than a few inches with a ~1.5W laser. (Obviously not a very scientific test.)

Last edited by InfinitusEquitas; 04-11-2012 at 07:08 PM.
InfinitusEquitas is online now   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 01:56 PM.


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