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.
Features:
• 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.
• Configurations Summary
• Heliostats
• Beam Directors
• Electro-Optical-Mechanical
Systems (EOMS) ™
• Gimbals
• Satellite Trackers
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