Subject: Re: photons vs. photoelectrons?
Hi All,
Hate to say I told you so... but you do need to do the calibration
yourself . By the way, the method they propose has an important and
fundamental assumption ....
I suggest that if Photometrics would like to add/explain the conditions
under which their calibration method is justified (and they assume
_only_ Poisson noise :-O) on the web page that would be a great help to
users.
My tenet (that you need to understand/check what is being done) would
seem justified :-)
my last 2c
Mark
Deepak Sharma wrote:
> ******Commercial Interest ******Reply from Photometrics******
>
> I would first like to thank the contributors to this subject matter for
> their input.
>
> Photometrics would like to provide information and actual data which should
> help answer the points raised and discussed. This can be found at:
>
>
http://www.photomet.com/useroutreach/042210.php
>
> We discuss measuring analog gain i.e. the cameras e/ADU conversion factor
> using a mean-variance analysis, how to calculate electron multiplication
> gain and the ‘flatness’ or photo-response non-uniformity. We also explain
> that Rapid-CAL and Quant-View features of the evolve camera utilize a
> combination of these measurements to provide accurate data integrity.
>
> We hope this data and information helps clarify some of the questions being
> asked and we are always happy to answer any questions you may have.
>
>
> Deepak Sharma, Ph.D.
> Senior Product Manager
> Photometrics
> 3440 East Britannia Drive
> Tucson, AZ 85706-5006
>