coelostat

n.

定天镜（观测或拍摄天体时镜面与地轴一同转动可使图像固定不动）；

Coelostat
Coelostat
Coelostat and heliostat: Theory of alignment
Coelostat and heliostat: alignment and use for eclipse and other field purposes
Polarization characteristics of Jensch coelostat
Polarization characteristics of the Jensch coelostat
Dynamics of a High-Agility, Low-Power Coelostat Telescope
Reduction of Instrumental Polarization of Coelostat Telescopes
Ellipsometry of coelostat coatings using a Babinet compensator: Simulation of the experimental accuracy
Polarization properties of a ‘Zeiss-type’ coelostat: The case of the solar tower in Arcetri