Exposure Time

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Nicolas

Exposure Time

Post by Nicolas »

Hi, I just read your article titled "Determination of exposing time of
holograms" and I have to say that it's very good, but I feel there's
something missing. Shouldn't the wavelength of the laser used be taken into
consideration when making the calculations? I have a laser diode with a
wavelength at 650nm and intend to use it on PFG-03M photoplates (I know it's
a little far from 633nm, but I'm told it should be good enough.). I suppose
I will have to expose my plate longer than if it was a 633nm, correct? How
would I do this? Slavich.com has a graph showing the sensitivity of the
plate at different wavelengths, how do I use it?Thank you very much in advance for your time, really appreciate it!
Nicolas
Sergey Vorobyov

Exposure Time

Post by Sergey Vorobyov »

Of course, the sensitivity of silicon photodiode have increase when wavelenght of laser is increase too. I shell try show diagram of sensitivity of silicon photodiode and I can give only table for sensitivity ("S" mcA/mcW, as in my article) now:
488 - 0,05
514 - 0,08
633 - 0,25
650 - 0,3
S=0,3 for calculation for silicon photodiode for wavelenght 650 nm.
Need remember, that sensitivity of photoplates PFG-03m maybe some reduce, when you use wavelenght 650 nm instead 633 nm.
wler

Exposure Time

Post by wler »

For determining exposure times, have a look at my site:
http://perso.wanadoo.fr/redlum.xohp/hol ... sures.html
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