Old 07-06-2009, 03:45 AM #1
Member
 
Join Date: Dec 2008
Posts: 40
Rep Power: 0
razeman is on a distinguished road
razeman razeman is offline
Member
 
Join Date: Dec 2008
Posts: 40
Rep Power: 0
razeman is on a distinguished road
Question Minimum OD?

Hi, I would like to know what is the minimum necessary Optical Density needed for a red diode laser if it is powered from 250mW and ahead... I don't have a clue about this and I am afraid of becoming blind.

Thank you in advance


razeman is offline   Reply With Quote


















Old 07-06-2009, 04:05 AM #2
jwc jwc is offline
Class 2 Laser
 
Join Date: Oct 2008
Posts: 337
Rep Power: 15
jwc is a glorious beacon of lightjwc is a glorious beacon of lightjwc is a glorious beacon of lightjwc is a glorious beacon of lightjwc is a glorious beacon of light
jwc jwc is offline
Class 2 Laser
 
Join Date: Oct 2008
Posts: 337
Rep Power: 15
jwc is a glorious beacon of lightjwc is a glorious beacon of lightjwc is a glorious beacon of lightjwc is a glorious beacon of lightjwc is a glorious beacon of light
Default Re: Minimum OD?

The OD value is a log value. If you aren't interested in the math, I'll tell you that 250mW would require at least a level of OD3 in order to ensure safety; that would make the 250mW laser appear as a 250/1000=0.25mW laser, which is safe (so long as you don't point it directly at your eyes of course).
jwc 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

























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 03:51 AM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC