Siderostats & Coeleostats

DFM Engineering has provided five siderostats mounting 0.5 meter aperture flat mirrors. These have been used for the JPL/Keck test bed interferometer and have extremely low jitter in the axis motion and in mirror piston. We have also provided drives for larger systems.

• Extremely low jitter
• 4 degrees per second axes motion
• Mirror front surface located precisely at the intersection of the axes
• On axis 1 arc second resolution encoders
• Axes fiducials
• Computer control system

Coeleostats: A ceoleostat is typically a siderostat, but the word is poorly defined. The name may also be used to describe a beam director.