Inventor

KOMMA YOSHIAKI

JP177 patents

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

KOMMA YOSHIAKI

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

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

Complex objective lens compatible with information media of different thicknesses

Optical disk device and information recording/reproducing method

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 pickup head having a hologram-associated objective lens and optical information processing apparatus using the same

Complex objective lens, optical head, optical information apparatus, computer, optical disk player, car navigation system, optical disk recorder, and optical disk server

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

Optical element, optical head, optical recording reproducing apparatus and optical recording/reproducing method

Compound objective lens for optical disks having different thicknesses

Optical element, optical head, optical recording reproducing apparatus and optical recording/reproducing method

Semiconductor light source, optical pickup head apparatus, and data record/playback apparatus

Information recording/reproducing apparatus

Focus and tracking error detection by using plus and minus first order diffracted light

Optical head device and optical information apparatus using a lithium niobate hologram with divisional areas to diffract light to corresponding photo detector areas

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

Optical head apparatus for storing, reading or erasing information, and optical information reproducing method and optical information apparatus for optically reading information stored in an optical memory

Hologram and optical apparatus with hologram

Focus detection device for reading information from an optical recording medium

Optical pick-up head apparatus wherein hollographic optical element and photodetector are formed on semiconductor substrate

Optical head for reproducing data from first and second optical disks

Optical pickup head apparatus

Optical pickup head apparatus

Optical pickup head wherein an error signal is produced by detecting a phase difference in diffraction beams from a holographic optical element

Optical pick-up, optical disk apparatus and information processing apparatus

Semiconductor light-emitting unit, optical apparatus and optical disk system having heat sinking means and a heating element incorporated with the mounting system

Complex objective lens, optical head, optical information apparatus, computer, optical disk player, car navigation system, optical disk recorder, and optical disk server

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

Method and apparatus for detecting foreign body on object surface, and optical disk apparatus

Optical head and optical recording/reproducing device using it and aberration correction method

Optical head apparatus, optical information recording and reproducing apparatus, method for detecting aberration and method for adjusting optical head apparatus

Diffraction grating and optical pickup apparatus with diffracting grating

Optical head device and optical information device using the same, computer, optical disk player, car navigation system, optical disk recorder, and optical disk server

Optical disk device and information recording/reproducing method

Optical disk device and information recording/reproducing method

Optical pickup lens device and information recording and reproducing device using the same

Optical head device and optical information apparatus using the same

Diffraction element, optical head device including the diffraction element, optical information apparatus including the optical head device, system including the optical information apparatus and method of designing diffraction grating of the diffraction element

Optical pickup lens device and information recording and reproducing device using the same

Optical element, optical head, optical recording reproducing apparatus and optical recording/ reproducing method

Optical disk device and information recording/reproducing method

Optical element, optical head and optical information processor

Optical pickup head device, information recording/reproducing apparatus, and method for recording information

Optical head device

PANASONIC CORP

Complex objective lens for an optical head and optical information apparatus

Optical pickup, optical disc drive device, and optical information device

Optical element, optical head, optical information recording/reproduction device, computer, video recording device, video reproduction device, server, and car navigation system

MATSUSHITA ELECTRIC CO LTD

Movable optical head integrally incorporated with objective lens and hologram element