Flylead for a video disc stylus cartridge

Focus and tracking error detection by using plus and minus first

Focus error detecting apparatus of optical pickup with a...

Focus error detection with two symmetrically splitted reflected

Focus error detector

Focus error detector

Focus optical system and optical disc master exposure apparatus

Focusing a light beam more than thirty focal depths from the...

Focusing adjustment of an optical pickup

Focusing control system

Focusing distance of an objective lens according to a vertical d

Focusing more than 30 depths from an aplanatic point of a plano-

Focusing time period and power control of a multilaser diode arr

Focusing two polarized beams onto different information carrier

Folding mirror structure

Free-space integrated micro-pickup head for optical data storage

Frequency demodulating circuit, optical disk apparatus...

Frequency selective optical data record/regenerate apparatus

Frequency, phase and amplitude control apparatus and method for