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Table 2.

List of all components in ZIMPOL.

Abbr. Name r i e p Comment
ZIMPOL common path
Shutter Cut transfer smear
PCOMP Polarization   compensator r i p Compensate DROT polarization
FW0 Filter wheel 0 e Color filters, NDs,   pol. calibration
HWPZ Half wave plate    ZIMPOL r i p Rotate polarization, calibrations
MOD Modulator (FLC)    and 0-HWP i p pol. modulation, blocking filter (BF)
BS Polarization beam splitter With camera lens “a”
ZIMPOL arms 1 and 2
FW1/2 Filter wheels 1,2 e Color filters, pupil lens in FW2
b1/2 Camera lenses “b”
TM1/2 Tip-mirrors 1,2 Mask illumination
TTM1/2 Tip-tilt mirrors 1,2 Dithering, offsets
f1/2 Field lenses 1,2 Mask illumination
CCD1/2 Detectors 1,2 pol. demodulation

Notes. “Short” gives abbreviations as used in this paper. Columns 3–6 indicate whether the components are rotating (r), insertable (i), exchangeable (e), or/and only inserted for visual polarimetry (p).

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