Device for setting up a vertical gyroscope

Device for stabilizing the mean wave length of a wide...

Device for suspending the action of ball-type erectors of...

Device for the dynamic measurement of inclinations

Device for the elimination of the anomaly deviation in...

Device for the stable determination of the vertical above a...

Devices for sensing deviations from a horizontal plane

Diascope for television camera and camera including such a...

Differential birefringent fiber frequency-modulated...

Differential capacitance detector

Differential fiber-optic frequency-modulated continuous-wave...

Digital auto focus in optical systems

Digital compass

Digital imaging system for airborne applications

Digital inclinometer

Digital level indicator

Digital map system

Digital parallax discriminator system

Digital processor for use with an accelerometer based...

Digital ramp phase type optical interference gyro