V-band light curve of V CVn from 2020-2022. The red triangles are the photometry measurements provided by Ob1 and Ob2. The gray dots are for AASVO data (CCD measurements only). The three pulsation cycles covered by polarization measurements in this study in red, namely at the left pulsation cycle 1/2020 in the middle 1/2021 and at the right cycle 1/2022. It can be seen that the data from AASVO agrees well with the data measured by Ob1 and Ob2. Pulsation cycle 1/2021 showed the lowest brightness of all minima considered.