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 08-12-2012, 07:12 PM #1
Class 1 Laser
 
Join Date: Apr 2012
Location: Czech Republic
Posts: 77
Rep Power: 0
btc5 is infamous around these partsbtc5 is infamous around these partsbtc5 is infamous around these partsbtc5 is infamous around these partsbtc5 is infamous around these partsbtc5 is infamous around these parts
btc5 btc5 is offline
Class 1 Laser
 
Join Date: Apr 2012
Location: Czech Republic
Posts: 77
Rep Power: 0
btc5 is infamous around these partsbtc5 is infamous around these partsbtc5 is infamous around these partsbtc5 is infamous around these partsbtc5 is infamous around these partsbtc5 is infamous around these parts
Default 300mW green can do harm from several meters?

Yesterday I was returning with friends from survival party and having no torch, we used his 300mW laser as illuminator to search for his missing phone. Partially good idea because this 300mW has only a direct beam and no dispersed beam. Accidentally he turned his laser toward one of our friend searching 10 meters away. It was just a moment only..... our fellow was blinded a while but we are wondering if green could be big harm from that distance?


btc5 is offline   Reply With Quote







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







Old 08-12-2012, 08:26 PM #2
Class 3R Laser
 
Join Date: Aug 2010
Location: PA
Posts: 1,132
Rep Power: 43
udanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond repute
udanis udanis is offline
Class 3R Laser
 
Join Date: Aug 2010
Location: PA
Posts: 1,132
Rep Power: 43
udanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond reputeudanis has a reputation beyond repute
Default Re: 300mW green can do harm from several meters?

Quote:
Originally Posted by btc5 View Post
Yesterday I was returning with friends from survival party and having no torch, we used his 300mW laser as illuminator to search for his missing phone. Partially good idea because this 300mW has only a direct beam and no dispersed beam. Accidentally he turned his laser toward one of our friend searching 10 meters away. It was just a moment only..... our fellow was blinded a while but we are wondering if green could be big harm from that distance?
Your english is pretty bad.....but If I am reading that correct.......A 300mw laser can in fact damage your eyes if it makes contact.
udanis is offline   Reply With Quote
Old 08-12-2012, 09:13 PM #3
ryansoh3's Avatar
Class 3R Laser
 
Join Date: Feb 2012
Location: Pittsburgh
Posts: 1,282
Rep Power: 276
ryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond repute
ryansoh3 ryansoh3 is offline
Class 3R Laser
ryansoh3's Avatar
 
Join Date: Feb 2012
Location: Pittsburgh
Posts: 1,282
Rep Power: 276
ryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond reputeryansoh3 has a reputation beyond repute
Default Re: 300mW green can do harm from several meters?

Your English not that bad though. :)

If the laser is truly rated at 300mW, yes, it would have done permanent damage.

I would recommend your buddy to go see a doctor.

However, more often than not, cheap "300mW" rated lasers are less than 30mW, and in this case, the "overestimation" was helpful.

Cheers. :beer:
__________________
Is your laser a BAMF?

With great power comes a great need for safety.

I am SICK of spoon feeding noobs who just don't care to search the forum.

Lasers:
405nm Amazon Set
445nm BAMF Link
445nm 2358mW Peak The Bushwhacker by Dogs Best Friend
445nm Fantasy Link
532nm "200mW" DealExtreme Pointer
532nm Amazon Set
650nm Amazon Set
FastTech is the new DX. (Nope, prices have gone up, nevermind!)

ryansoh3 is offline   Reply With Quote
Old 08-17-2012, 03:11 PM #4
Junior Member
 
Join Date: Sep 2010
Posts: 8
Rep Power: 0
mikedelfino is on a distinguished road
mikedelfino mikedelfino is offline
Junior Member
 
Join Date: Sep 2010
Posts: 8
Rep Power: 0
mikedelfino is on a distinguished road
Default Re: 300mW green can do harm from several meters?

Quote:
Originally Posted by ryansoh3 View Post
Your English not that bad though.

If the laser is truly rated at 300mW, yes, it would have done permanent damage.

I would recommend your buddy to go see a doctor.

However, more often than not, cheap "300mW" rated lasers are less than 30mW, and in this case, the "overestimation" was helpful.

Cheers.
Keep in mind that with the divergence a DDPS 300mw laser at 10 meters has a dot size > 1 cm meaning that the whole power is then spread on 1cm instead of 1-3mm so that the same point will only receive a small part of the initial power.

The second thing is that at a distance if the laser is moving, the exposure time is really short and the laser is gone since a long time when you blink. Especially as the only way to see something with a laser is to "scan" the ground really fast.

Moreover an exposure of 0.250s at 10mw only causes damages to 50% of the population which is not always permanent and that 300mw also contains IR which is not focused. A friend got a reflection in a mirror with a 50mw green laser not IR filtered at short range and only got a dot during two days in his eye.

Last edited by mikedelfino; 08-17-2012 at 03:13 PM.
mikedelfino is offline   Reply With Quote
Old 08-17-2012, 05:38 PM #5
hoo7h's Avatar
Class 1M Laser
 
Join Date: Aug 2012
Location: Seattle, WA
Posts: 135
Rep Power: 6
hoo7h is on a distinguished road
hoo7h hoo7h is offline
Class 1M Laser
hoo7h's Avatar
 
Join Date: Aug 2012
Location: Seattle, WA
Posts: 135
Rep Power: 6
hoo7h is on a distinguished road
Default Re: 300mW green can do harm from several meters?

Man you could of used a flashlight !
Why do people always take laser injuries as a joke
hoo7h is offline   Reply With Quote
Old 08-17-2012, 07:42 PM #6
borgqueenx's Avatar
Class 3R Laser
 
Join Date: Jun 2008
Location: Netherlands
Posts: 1,664
Rep Power: 183
borgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond repute
Send a message via MSN to borgqueenx
borgqueenx borgqueenx is offline
Class 3R Laser
borgqueenx's Avatar
 
Join Date: Jun 2008
Location: Netherlands
Posts: 1,664
Rep Power: 183
borgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond repute
Send a message via MSN to borgqueenx
Default Re: 300mW green can do harm from several meters?

ugh yes. just dont get it into your eyes! to calculate if it is dangerous for your eyes should only be done for lasershows. not for pointers...
divergence and stuff like that, dont learn it for pointer use ^^

but for your friend i made some simple calculations and think he might be save. Let him do a eye check though.
300mW at 10meters is ofcource dangerous but if it was a really quick flash it might not have been a lasting effect. Remember that the more still a laser is the more damage it can do.
__________________
Me against China: I have a LPM and i'm not afraid to use it!

My Photonic Collection:
600mW 532nm Jetlaser Pointer(Peak 667mW)
2.5W RGB Projector
6,9W 445nm Burning Monster.

Last edited by borgqueenx; 08-17-2012 at 07:48 PM.
borgqueenx is offline   Reply With Quote
Old 08-18-2012, 10:16 AM #7
borgqueenx's Avatar
Class 3R Laser
 
Join Date: Jun 2008
Location: Netherlands
Posts: 1,664
Rep Power: 183
borgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond repute
Send a message via MSN to borgqueenx
borgqueenx borgqueenx is offline
Class 3R Laser
borgqueenx's Avatar
 
Join Date: Jun 2008
Location: Netherlands
Posts: 1,664
Rep Power: 183
borgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond reputeborgqueenx has a reputation beyond repute
Send a message via MSN to borgqueenx
Default Re: 300mW green can do harm from several meters?

Quote:
Originally Posted by HZLaser View Post
safety is the first when we use laser ,and i suggest you buy a safety gogglses,so that ensure you safety especially eyes !
thats only for burning stuff and experimenting. for shining in the dark the goggles are the most useless ever ^^
__________________
Me against China: I have a LPM and i'm not afraid to use it!

My Photonic Collection:
600mW 532nm Jetlaser Pointer(Peak 667mW)
2.5W RGB Projector
6,9W 445nm Burning Monster.
borgqueenx 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 07:46 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