Inventor

KATAYAMA RYUICHI

JP48 patents

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

KATAYAMA RYUICHI

NEC CORP

Optical head apparatus for different types of disks

Optical head with a phase plate for different types of disks

Optical head and optical information recording and playback apparatus

Optical head having a phase-shifting diffraction grating

Polarization beam splitter and method for making the same

Optical head device

Magneto-optical head system for detection of error and information signals by diffraction lights

Magneto-optical light detector apparatus

Optical system for detecting data signal and tracking error signal

Optical head assembly and optical information recording/reproducing device

Optical head and optical data recording/reproducing apparatus using the same

Optical head and optical information recording/reproducing device

Optical head apparatus and optical information recording and reproducing apparatus

Optical head system having super resolution element

Head device for magneto-optical disk

Photodetecting system for a magneto-optical disk head system

Optical head apparatus including two light sources and one photodetector

Optical head device and optical information recording/reproduction apparatus

Optical head device and optical recording and reproducing apparatus

Optical head device and optical information recording/reproducing device

Optical head unit and optical information writing/reading device

Radial tilt detection optical head apparatus and optical information apparatus

Optical head device and optical information recording/reproducing apparatus

Optical head device and optical information recording or reproducing device

Optical head for land and groove recording

Radial tilt compensating optical disk apparatus using tracking control loop gain

Optical disk device for detecting thickness errors of the transparent substrate

Optical information recording/ reproducing device and optical information recording/ reproducing method

Optical head device and optical recording and reproducing apparatus

Optical head device and optical information recording or reproducing device

Birefringence characteristic measuring method, optical recording medium and optical information recording/reproducing apparatus

Birefringence characteristic measuring method, optical recording medium and optical information recording/reproducing apparatus

Optical head device for detecting an error signal and an optical information recording/reproducing device

Optical head apparatus and optical information recording/reproducing apparatus

Optical head apparatus and optical information recording or reproducing apparatus

Method for detecting radial tilt of optical recording medium in optical head device, optical head device, and optical information recording/reproducing device

Optical head device, optical information recording/reproducing apparatus and operation method of optical information recording/reproducing apparatus

Optical head device and optical information recording or reproducing device

KATAYAMA RYUICHI

Light emitting element and image display apparatus using the light emitting element

Light emitting element and image display apparatus using the light emitting element

Wavelength plate, light emitting element, and image display device using the light emitting element

Optical information recording/ reproducing apparatus and optical information recording and reproducing method

Polarized light emitting element for display apparatus

Light emitting element and image display device using the light emitting element

TOMIYAMA MIZUHO

Light emitting element having structural bodies arrayed at a first pitch along a first direction and arrayed at a second pitch different from said first pitch along a second direction and projection display device provided with same

TOSHIBA KK

Optical disk medium and optical disk recording/reproducing apparatus utilizing tilt detection areas having special marks

INNOVASTELLA CO LTD

Device and recording apparatus

TOMINAGA SHIN

Optical information recording/reproducing device, optical unit, and optical information recording method