Inventor

OPHEIJ WILLEM G

NL30 patents

⚠️ This page may combine multiple inventors who share the name “OPHEIJ WILLEM G”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

OPHEIJ WILLEM G

PHILIPS CORP

Memory card comprising an optical memory disc and microelectronic memory component, and apparatus for transferring information to and from such card

Optical scanning unit with tracking error detection

Optical record carrier with surface layer extending to the center of a substantially circular information track structure therein

Device for determining a centring error of an optical disc relative to the axis of rotation of a turntable supporting the disc

Objective lens and scanning device using such an objective lens

Optical device determining the position and orientation of an object, and optical recording and/or reproducing apparatus including the device

Optical record carrier scanning apparatus providing optoelectronic positioning of the scanning spot

Scanning device for an optical recording and/or reproducing apparatus

Apparatus for recording and reading information tracks on an optical record carrier with a beam of radiation

Apparatus for reading and/or writing an optically readable information structure

Planar optical scanning head having deficiency-correcting grating

Optical scanning device using a plurality of scanning spots

Optical scanning apparatus

Apparatus for optically scanning an information plane

Optical recording and/or reproducing apparatus with optical sensing of scanning mirror position

Planar optical scanning head with concentric diffraction gratings

Three element grating objective and grating-beam shaper, and optical scanning device

Optical scanning device, mirror objective suitable for use in said device and optical write and/or read apparatus provided with said device

Optical scanning device, mirror objective suitable for use in said device and optical write and/or read apparatus provided with said device

Electronically adjustable position-sensitive radiation detector and optical systems using same

Method of recording a digital information signal on a record carrier having a radiation-sensitive information layer, apparatus for carrying out the method, and optical record carrier provided with such a digital information signal

Apparatus for reading an optical record carrier

Optical focussing device with inclination detection

Apparatus for reading an optical record carrier having a radiation-reflecting information structure

Apparatus for reading an optical radiation-reflecting record carrier including a narrow focus control beam

Device for optically scanning an information plane detecting border portions of light beam

Optical scanning apparatus

Apparatus for reading an optical radiation-reflecting information carrier for controlling focus

Optical scanning device including mirror objective having two windows at least one having an aspherical surface

(unassigned)

Optical unit having a radiation source, a detector and a grating, and scanning device including the optical unit