[Katsuki, Marc, Shalika]

A 1mm thin hydrogel was prepared between plates to measure its birefringence. We change the LC voltage from 0.5-3 V with step size of 0.25V and averaging  of 10th order.

without sample

C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\cell birefringence\hydrogel\Tue, Sep 24, 2024 3-23-26 PM.txt

We try to shake the hydrogel to see if any movement due to air flow will change the output. The range of azimuth change is 0.02 deg and ell change is 0.1 deg. We then try to stretch the hydrogel using force gauge. The minimum reading of force gauge is 10g.

1. At, F = 10g

C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\cell birefringence\hydrogel\Tue, Sep 24, 2024 3-27-28 PM.txt

It seemed there were issues related to the resolution of the gauge, and we weren't able to see anything other than 10. When we saw the force gauge reading of 40g, the hydrogel broke. We started taking measurements related to the position of the black actuator on the bar

2. 31 cm : C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\cell birefringence\hydrogel\Tue, Sep 24, 2024 4-02-55 PM.txt

3. 30 cm: C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\cell birefringence\hydrogel\Tue, Sep 24, 2024 4-22-05 PM.txt

4. 29.5 cm : C:\Users\atama\Dropbox\LC-Experiment\Measurement Data\cell birefringence\hydrogel\Tue, Sep 24, 2024 4-16-38 PM.txt

The figures are in order of the measurement taken.