TY  - RPRT
TI  - Ring lens focusing and push-pull tracking scheme for optical disk systems
AU  - Gerber, R.
AU  - Zambuto, J.
AU  - Erwin, J. K.
AU  - Mansuripur, M.
PY  - 1993
UR  - https://ntrs.nasa.gov/citations/19940010517
ID  - 19940010517
ER  -