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 01-31-2010, 12:44 AM #1
Junior Member
 
Join Date: Jan 2010
Location: Miami,FL
Posts: 4
Rep Power: 0
usapatriot is on a distinguished road
usapatriot usapatriot is offline
Junior Member
 
Join Date: Jan 2010
Location: Miami,FL
Posts: 4
Rep Power: 0
usapatriot is on a distinguished road
Smile 5mW LEDShoppe Green Laser Safety Concerns

Hello all,

I suppose this being my first post that I will introduce myself here as well. I've always had an affinity for lasers ever since I was gifted a 1mW cheap red laser years ago. I've been thinking and I may want to collect a few lasers as a hobby. Anyways, I decided I'd like to get another laser this past week and using money left over in my PayPal account ordered a $13 5mW green laser pen pointer from LEDShoppe. Now, I am aware of some of the safety considerations when using a laser pointer but I'd like to learn a bit more.

I've read that occasionally, LEDShoppe's 5mW lasers are over specification making them much more dangerous to the eye. I've also heard they give off a lot of IR light which is invisible and can do damage. I'll phrase my concerns as questions as they will be easier to see and respond to.

Anyways, here are my concerns:

1. Is there any way to tell if my laser is over 5mW? I've heard of there being a device that does this but I don't want to spend money on something expensive at this point. Is there a way of roughly estimating power output?

2. Is there any way of telling how much IR light is being put out, if so, how much would be dangerous to the eye and how exactly would one get exposed to IR light while using a laser? Any methods of blocking the IR light?

3. Obviously, I won't be pointing the laser at any living animal or reflective surfaces. But are there are other surfaces I shouldn't point the laser at?

4. I've read that it is not good to look at the point of light at the end of the beam. However, the general consensus is that this only applies to really powerful lasers, is there some truth to this?

5. Any other safety considerations I should be aware of?

Thank you so much! I'd love to collect a few lasers here and there, but I'd also would like to be keenly aware of any and all safety implications!


usapatriot is offline   Reply With Quote







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







Old 01-31-2010, 02:40 AM #2
Class 3B Laser
 
Join Date: Oct 2009
Location: Central New York State - Watkins Glen - planet Earth
Posts: 2,745
Rep Power: 101
photonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond repute
photonaholic photonaholic is offline
Class 3B Laser
 
Join Date: Oct 2009
Location: Central New York State - Watkins Glen - planet Earth
Posts: 2,745
Rep Power: 101
photonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond reputephotonaholic has a reputation beyond repute
Default Re: 5mW LEDShoppe Green Laser Safety Concerns

Welcome to LPF. Enjoy your time with us here.

Regardless of stated power, Treat your laser like a loaded gun, always respect it.

As for other surfaces, white walls for extended periods will give enough reflection to make your eyes itch after a few moments. most any glass surface will reflect a lot back, fish tanks can split the beam into multiple beams.

road signs, driveway markers and bicycle reflectors are really bad, since the coating is retro reflective, meaning nearly all light is directed back at the source, regardless of the angle.

I wish I had more time right now, but I'm sure someone else will chime in soon.

I have included a handy guide to assist you in finding what you need.



__________________
Thanks for reading my post.
Kind regards, Wayne

------------------------------------------------------------------
"Disclaimer: all posts made by me are based on my own opinion only,
That opinion is subject to change without notice."


Too much knowledge is dangerous, not enough is worse.
Adapted from Einstein quote.
------------------------------------------------------------------
If you want to burn things, buy a lighter
------------------------------------------------------------------
My Pet Forums - for the animal fans Link
Dances With Reptiles - If you like snakes Link

Last edited by photonaholic; 01-31-2010 at 02:44 AM.
photonaholic is offline   Reply With Quote
Old 01-31-2010, 02:56 AM #3
hakzaw1's Avatar
Class 4 Laser
 
Join Date: Apr 2009
Location: 'Deep in the Heart Of Texas..."
Posts: 8,359
Rep Power: 28118
hakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond repute
hakzaw1 hakzaw1 is online now
Class 4 Laser
hakzaw1's Avatar
 
Join Date: Apr 2009
Location: 'Deep in the Heart Of Texas..."
Posts: 8,359
Rep Power: 28118
hakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond repute
Default Re: 5mW LEDShoppe Green Laser Safety Concerns

You can seriously mess up a digital camera with a laser as well as your eyes(straight shot). search and read ==read and search-- its mostly all there.
hakzaw1 is online now   Reply With Quote
Old 01-31-2010, 01:06 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: 5mW LEDShoppe Green Laser Safety Concerns

Making a rough estimate of power is quite hard, I've turned up a red keychain pointer to 10mW, but it really didn't look more dangerous than 1mW. A power meter would be needed to measure the output. This also goes for the IR, unless it's not present, there's not really a way to measure it. At least I'm not aware of it. Detecting it's presence can be done by hacking a cheap webcam into an IR cam (very nice to have around), or a camera with a night vision feature.
Power meters can be very expensive, at least the real deal. But there are cheaper alternatives, some people experiment with homemade tec or photodiode based power meters. Sending lasers to another members to spec them also occurs sometimes.

Assuming we've got 5mW of green and no IR, any diffuse surface is no problem. The spot will be bright, but not hurting your eyes. Glossy surfaces and mirror bounce significant portions of the light, up to 90% in a worst case. For below 5mW, you can get away without safety eyewear if you have a normal blink reflex. I'd be a bit more cautios, like around 3mW. But common sense can perfectly keep you safe here. Above 5mW is too dangerous without glasses, damage can occur before you can react.
Again, if the spot can be looked at without hurting your eyes, it's fine. Around 200-300mW the spot really gets very bright, I'd wear glasses even for the diffuse reflection. Looking up close lowers this off course. Above 500mW you really need goggles. But at these high powers, a direct hit is so dangerous that you should be wearing glasses anyway.

laservision has a nice guide, this explains the whole safety thing.
Bluefan 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 04:54 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