spectropolarimeter

A stellar spectropolarimeter is used to measure the magnetic field of a star.

One of the more famous instruments produced in the early days was the Cary-60 CD spectropolarimeter, used to measure circular dichroism.

A JASCO J-810 CD spectropolarimeter operating at 25 C was used to collect CD spectra.

SPEX (the Spectropolarimeter for Planetary EXploration) is a single channel, high precision polarimeter for the characterization of planetary atmospheres.

Since 2007, the Bernard Lyot Telescope is housing an echelle spectropolarimeter NARVAL, allowing astronomers to probe stellar magnetic fields to an exquisite sensitivity.

Future instrumentation planned for CFHT include SITELLE, a Fourier transform spectrograph, and SPIRou, a near-infrared spectropolarimeter.

A former telescope dome now houses a remotely-operable mount with a micropulse LIDAR/ceilometer, ultra-sensitive sun polarimeter and a cirrus-detecting infrared pyrometer, with further plans to add an infrared spectropolarimeter in the near-future.

The red beam has a tunable filter called CRisp Imaging SpectroPolarimeter (CRISP) which operates from 510 to 860 nm and is able to measure polarization by using liquid crystal modulation combined with a polarizing beamsplitter.