Warning: Undefined variable $s in /var/www/public_html/osl/classes/DAO.php on line 959
NAOJ GW Elog Logbook
LOG-IN
Displaying report 1-1 of 1.
BIGFOOT (Cavity)
Print this report.
MarcEisenmann - 18:45, Tuesday 14 March 2023 (3202)Get code to link to this report
LC characterization and fit

I fit the unwrapped retardation of the LC (expressed in nm) as a function of temperature and voltage.

The peak to peak uncertainty is surely about 20 nm due to our 2.5deg azimuth angle we measured with 0V applied to the LC.

Indeed, the largest peak in the residuals appear at the folding voltages.

The rms of the residual is 2.6nm.

Images attached to this report
3202_20230314104542_fit.png
Comments related to this report
MarcEisenmann - 15:14, Wednesday 15 March 2023 (3203)

For reference I attach to this entry the retardation fit with and without taking into account the temperature of the LC.

Note that here and in previous entry I used the mean of the 3 data taken at every voltage step.

Taking into account the temperature in the fit reduce the residual rms by a factor 2 and the peak to peak by 50%.