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spectrohelioscope
spectrohelioscope n.
Brit. 
/ˌspɛktrə(ʊ)ˈhiːlɪəskəʊp/
, /ˌspɛktrə(ʊ)ˈhiːlɪəskəʊp/U.S. /ˌspɛktroʊˈhiliəˌskoʊp/
an instrument which provides a directly observable monochromatic image of the sun by means of a rapidly scanning device which transmits light of only one wavelength (which may be modified so that Doppler shifts can be observed)./ˌspɛktroʊˈhiliəˌskoʊp/ΘΚΠ
the world > the universe > cosmology > science of observation > astronomical instruments > observational instruments > [noun] > sun
helioscope1675
heliostat1747
photoheliograph1862
photohelioscope1864
coronagraph1885
spectroheliograph1892
spectrohelioscope1906
spectroheliometer1973
1906 Astrophysical Jrnl. 24 42 This instrument..constitutes a spectrohelioscope, and was intended for the visual study of prominences.
1929 G. E. Hale in Encycl. Brit. XXI. 179/2 The spectrohelioscope renders visible to the eye many of the phenomena of the solar atmosphere photographed with the spectroheliograph and also permits their velocities in the line of sight to be measured.
1932 G. E. Hale Signals from Stars 48 The first spectrohelioscope (as I have named the instrument).
1955 Sci. Amer. Sept. 194/2 In 1890 George Ellery Hale and Henri Deslandres independently invented the spectrohelioscope. This instrument utilized the red light of hydrogen to produce an image of the entire disk of the sun.
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