photoheliograph


Also found in: Dictionary, Wikipedia.

photoheliograph

[¦fōd·ō′hē·lē·ə‚graf]
(optics)
A refracting telescope specially designed to photograph the sun's disk.
Mentioned in ?
References in periodicals archive ?
In 1929 the photoheliograph was removed and placed on a mount in the NW dome, where it sill is.
Heliographical positions and areas of sun-spots observed with the Kew photoheliograph during the years 1862 and 1863.
A partial eclipse of the Sun on April 17 photographed from Greenwich with the Thompson Photoheliograph when 15 exposures were made.