Inventor

MIZUNO SADAO

JP60 patents

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

MIZUNO SADAO

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

Lens, optical head, optical information writing/reading apparatus and optical information recording medium writing/reading method

Optical head and optical data recording and reproducing apparatus having the same

Multiple focus lens, an optical head apparatus and an optical information recording-reproducing apparatus

Compound objective lens having two focal points

Correction elements to lower light intensity around an optical axis of an optical head with a plurality of focal points

Compound objective lens having two focal points

Optical recording apparatus employing stacked recording media with spiral grooves and floating optical heads

Compound objective lens for optical disks having different thicknesses

Optical element, optical head using the optical element, and optical recording and reproducing apparatus using the optical element

Optical head and an optical disk apparatus

Optical head

Optical head

Optical head for adjusting a positional relation between the information medium and the optical head

Multilayer optical disk and apparatus

Multilayer optical disk and apparatus

Optical disk apparatus for optically recording or reproducing information on an optical recording medium

Focus detection device for reading information from an optical recording medium

Optical element, optical head and optical recording reproducing apparatus

Optical head for reproducing data from first and second optical disks

Optical head system and its optical disc

Method of replacing secondary battery

Optical element, optical lens, optical head apparatus, optical information apparatus, computer, optical information medium player, car navigation system, optical information medium recorder, and optical information medium server

Optical pickup head and information recording/reproducing device

Converging element, optical head, and apparatus and method of optically recording and reproducing information

Optical recording/reproducing apparatus for high density multilayered disks

Optical head apparatus including concentric, periodic grating in a waveguide

Optical head device and optical information apparatus using the same

Optical element, optical head and optical information processor

Optical head with objective lens having different numerical apertures to minimize light aberration with respect to optical disks of different thicknesses

Optical disk apparatus for producing information recorded on a recording track

Optical disk apparatus for optically recording or reproducing information on an optical recording medium

Correction element of lower light intensity around an optical axis of an optical head with a plurality of focal points

Optical head

Optical head device and optical information apparatus using the same

Optical head and optical recording and reproducing apparatus

Optical recording head capable of correcting spherical aberration

Optical head device, optical information apparatus, and method for detecting focus error signal

Objective lens with center and periphery portions producing reciprocal interference, and optical head and optical disk device using the same

Optical information recording and reproducing apparatus and method of recording and reproducing information in an optical disk unit

Converging element, optical head, and apparatus and method of optically recording and reproducing information

AISIN SEIKI

Finishing machines for internal spline tooth surfaces

Method of lapping a bevel gear

Method of dressing honing wheels

Grinding method using grit stuck to a tool having low hardness

Rail construction for machine tool

PANASONIC CORP

Optical head for optical recorder/reproducer

Objective lens for optical disks having different thicknesses

Optical element and optical head device using it, and optical information device using this optical head device, and computer, optical disk player, car navigation system, optical disk recorder and optical disk server using this optical information device

Optical recording medium, optical information processor, and optical recording/reproducing method

Optical head device and optical information apparatus using the same