CC-POL Components: Overview
For dual beam polarimeters an uncertainty in metardeed polarization of 0.5% requires 8x104 photons per resolution element
- Dual beam polarimeters operate as a function of photon numbers and hence are not limited by poor observing conditions
Single beam polarimeters require fast modulation to remove effects of change of background/transparency
Dual beam polarimeters greatly superior to single beam polarimeters
- require analyzer, retarder and focal plane mask