Roof surface measuring apparatus
Rotary detector having an optical system for guiding two diffrac
Rotatable shear plate interferometer
Rotation detecting apparatus and scale having a multi helix diff
Rotation rate measuring device
Rotation rate measuring instrument
Rotation rate measuring instrument
Rotation rate measuring instrument
Rotation rate measuring instrument
Rotation rate measuring instrument
Rotation rate measuring instrument
Rotation rate measuring instrument having reduced reflection int
Rotation rate nulling servo and method for fiber optic rotation
Rotation sensitive ring laser system
Rotation sensor output signal processor
Rotational vibration drive for a ring laser gyroscope
Rough surface profiler and method
Rough surface profiler and method
Rough surface profiler and method
Rpm measuring device utilizing an optical fiber coil and winding