photopolarimetern.
/ˌfəʊtəʊpəʊləˈrɪmᵻtə/, U.S. /ˈˌfoʊdoʊˌpoʊləˌrɪmədər/ 1. Science. An apparatus for measuring the proportion of polarized light in a beam.
ΚΠ
1890 Cent. Dict. Photopolarimeter, a form of polarimeter.
1980 Optics & Spectrosc. 48 l229/1 The error signal is converted into a rotation of the plane of polarization of the light, which is recorded by the photopolarimeter.
1999 Computers & Math. with Applications June 133 Measurements of aerosols with a portable photopolarimeter.
2. Astronomy. A telescopic apparatus for measuring the polarization of light from celestial objects; a polarimeter combined with a photometer.
ΘΚΠ
the world > physical sensation > sight and vision > optical instruments > instruments for measuring > [noun] > light or radiation
phaometer1747
photometer1779
diaphanometer1789
lucimeter1825
refractometer1842
Abbe refractometer1876
dietheroscope1877
reflectometer1879
radiomicrometer1887
holophotometer1888
flicker photometer1896
microphotometer1899
diffractometer1909
spot meter1952
photopolarimeter1971
the world > the universe > cosmology > science of observation > astronomical instruments > observational instruments > [noun] > telescope
sector1711
astronomical telescope1723
sweeper1786
comet seeker1819
photo-telescope1893
Schmidt–Cassegrain1943
space telescope1953
photopolarimeter1971
1971 Time 15 Mar. 46 Light measurements by Pioneer's imaging photo-polarimeter will enable computers on earth to construct about ten pictures of the planet [sc. Jupiter] that will show features as small as 250 miles across.
1974 Nature 6 Sept. 18/1 The imaging photopolarimeter of Gehrels et al. contained a 2·5 cm telescope which made maps of Jupiter.
1992 S. S. Hall Mapping Next Millennium (1993) Introd. 7 Planetary geologists have mapped the hills and dales of Venus by radar, Mars by magnetometer, Jupiter with photopolarimeters, the moon in person.
This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).
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n.1890