MPE calculations made easy

[mccarrot]

No this is not correct.

MPE got nothing to do with pupil diameter, its measured in joules/cm2

(t) should be you variable, as this is the one you measure (or pick)

in your example:
1,8*10^-3*(0,25)^0,75) = 636uJ/cm2

You should also add pulse repeats to calculate the real MPE

[hivelaser]

if t is your variable what does it stand for then? time or what?

also what is the max allowed?

I got some of the figures here:
http://safety.uchicago.edu/files/Las...lculations.pdf

[mccarrot]

its the pulse time, the maximum pulse time to be considered is 0,25s

[hivelaser]

so whats the max we can have? i want to add it so it shows if you are over the limit...

[mccarrot]

The pulse time is measured with a fast silicon photodetector, so we can calculate the MPE. with this formula the pulse time must be within 18µs to 10s

then when we have the MPE, we can check if the irradiance of your laser exceeds this MPE

[hivelaser]

Hi Mccarrot do you have time to chat online, let me know if you can and where you will be...

[hivelaser]

whats the equation for the Divergence Calculator please post it here...

[hivelaser]

http://www.2amhollywood.com/anton/laser

check this on your android or iPhone it will later be packaged as a native APP that you can install on your phone... but just to test it online as well