Photochromic recording with a recording and erasing temperature

Photodetector and optical pickup apparatus

Photodetector and optical pickup apparatus

Photodetector and optical pickup device

Photodetector disposed on both sides of an objective lens for re

Photodetector with regions to detect reflected light pass throug

Photodetector, diffraction grating, optical pickup and...

Photoelectric sensor, information recording system, and informat

Photoelectric sensor, information recording system, and informat

Photomagnetic head apparatus

Photorefractive, erasable, compact laser disk

Physically optimized optical disc structure, method and apparatu

Pick-up

Pick-up assembly for video disc player

Pick-up device for use in an optical information recording syste

Pick-up for selectively reading and writing an optical recording

Pick-up needle

Pick-up with adaptation

Pickup apparatus and method for laser beams having different wav

Pickup apparatus for disk player having a frame for...