A new 10 micron astronomical polarimeter

Details A new 10 micron astronomical polarimeter A new 10 micron astronomical polarimeter

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981opten..20...19e&link_type=abstract

Optical Engineering, vol. 20, Jan.-Feb. 1981, p. 19-24.

Astronomy and Astrophysics

Astronomy

3

Birefringence, Infrared Astronomy, Infrared Telescopes, Polarimeters, Polarization Characteristics, Signal Processing, Circular Polarization, Digital Systems, Linear Polarization, Zinc Selenides

Scientific paper

A new design for an astronomical polarimeter optimized for use in the 8- to 13-micron spectral region based on an earlier visible wavelength instrument is described. The combination of a special infrared ZnSe birefringence modulator and a background-limited fast photoconductive detector permits carry-over of many of the digital signal processing advantages of the earlier instrument. Within a single measurement sequence, this instrument will measure the photometric intensity, the circular polarization, and both components of the linear polarization. Used with a 2.5-m class infrared telescope, the device should permit a 3 standard devidation detection of 1% linear or circular polarization at 10 microns in less than 400 seconds of any compact source brighter than 1.2 mag.

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