Precision increased over mechanical engravers. Laser pulses timed according to rotational speed of rotor electrostatically suspended in vacuum marks angular-encoder disk mounted on lower end of rotor. Precision of timing circuitry and low rotational damping (damping time about 700 years in high vacuum) results in highly-precise angular intervals. System conceived to meet need for increased precision of angular measurements in advanced scientific instruments.
Advanced Engraving Of Angle-Encoder Disks
NASA Tech Briefs ; 13 , 6
1989-06-01
Miscellaneous
No indication
English
IEEE | 1966
|Capacitive shaft-angle encoder
NTRS | 1977
|Tema Archive | 1974
|Electronic shaft-angle encoder
NTRS | 1977
|