DFM Engineering, Inc.
1035 Delaware Ave. Unit D
Longmont, CO 80501
Phone: 303-678-8143
Fax: 303-772-9411

Optical Systems

There is some confusion concerning the words "siderostat", "lunastat", "heliostat", "ceoleostat", and "beam director" due to how the various configurations are presently used compared to historical usage.

We define a siderostat as an altitude over azimuth (Alt-AZ) gimbal mounting a single optical flat mirror. We define a heliostat as an equatorially mounted optical flat mirror that directs light along the polar axis either upward or downward. A lunastat may take either configuration. A ceoleostat is typically a siderostat, but again the word is poorly defined. A beam director can take the form of a siderostat, or a Coude' telescope of Alt-AZ, Alt-Alt, or equatorial configuration.

Configurations Summary



Beam Directors


Satellite Trackers

Electro-Optical-Mechanical Systems™ (EOMS™)