Rosmalen Gerard Eduard Van

Optical scanning unit comprising a translational-position and angular-position detection system for an electro-magnetically suspended objective

Optical scanning unit having a main lens and an auxiliary lens

AUTOMATIC OPTICAL FOCUSSING SYSTEM

Compatible optical scanning device

Opto-electronic apparatus for writing and/or reading recording tracks by means of a radiation beam

Device for optically scanning a rotating disc

Apparatus for reading information from a record carrier

Optical scanning device, and recording and/or read apparatus comprising such a scanning device

Device for optically determining the position and orientation of an object, and optical recording and/or reproducing apparatus provided with such a device

OPTICAL SCANNING MEANS