Inventor

HIRAI HIDEAKI

JP53 patents

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

HIRAI HIDEAKI

RICOH KK

Optical-pickup device and tilt-detecting method thereof

Optical element, optical pickup unit, and optical disk drive unit

Optical pickup and optical information processing apparatus with light sources of three different wavelengths

Optical pickup unit

Optical pickup unit having electro-optical element and information recording and reproduction apparatus

Optical pickup and optical information processing apparatus

Objective lens, optical pickup, and optical information processing apparatus using the same

Optical-pickup device and tilt-detecting method thereof

Information recording and reproduction apparatus including optical pickup unit

Optical disk apparatus with aberration correcting part, and optical disk

Optical element, optical pickup unit, and optical disk drive unit

Optical recording medium having relationship between pit depths, wavelength and refractive index

Objective lens, optical, pickup and optical information processing apparatus using the same

Object lens for an infinite-type optical pickup, optical pickup and optical information processing device

Optical device, method of producing the same, optical pickup, and optical information processing device

Optical recording medium tilt compensation device, tilt compensation method, and optical information recording apparatus

Optical switching element, optical switching device, and color image displaying apparatus

Optical pickup and optical information processing apparatus

Objective lens, optical pickup, and optical information processing apparatus using the same

Optical reproduction method, optical pickup device, optical reproduction device, and optical recording medium

HIRAI HIDEAKI

Object identifying apparatus, moving body control apparatus, and information providing apparatus

Optical device and method of producing the same

Imaging device, object detecting apparatus, optical filter, and manufacturing method of optical filter

Transparent object detection system and transparent flat plate detection system

Detection apparatus and method

Foreign substance detection device, moving body control system including foreign substance detection device, and moving body including moving body control system

Optical element, polarization filter, optical isolator, and optical apparatus

Spectral image acquiring apparatus

Attached matter detector and in-vehicle device controller using the same

Optical element having three or more sub-wavelength convexo-concave structures

Reflecting wavelength plate and optical pickup using reflecting wavelength plate

Reflecting wavelength plate and optical pickup using reflecting wavelength plate

RICOH CO LTD

Image pickup

Polarization splitting device, method of manufacturing polarization beam splitter, optical scanning device, and image forming apparatus

Optical pickup and optical information processing apparatus with light sources of three different wavelengths

Optical element and optical device

Optical pick-up, method of generating aberration for compensation and optical information processing apparatus using the same

Optical pickup and optical data processing device using the same

Optical pickup and optical data processing device using the same

LI XUE

Object identification device

Vehicle detection device and vehicle detection method

KASAHARA RYOSUKE

Imaging element and imaging apparatus that extract light of a specific wavelength

Image processing apparatus, image-capturing method, and vehicle

XUE LI

Object identification device, moving object controlling apparatus having object identification device, information presenting apparatus having object identification device, and spectroscopic image capturing apparatus

SAWAKI TAROH

Attached matter detector and vehicle equipment control apparatus

KOBAYASHI MASANORI

Liquid droplet recognition apparatus, raindrop recognition apparatus, and on-vehicle monitoring apparatus

ITOH IZUMI

Image pickup unit and vehicle in which image pickup unit is mounted

HASHIGUCHI TSUYOSHI

Optical element, refractive index sensor, refractive index sensor array, and biosensor

OOHCHIDA SHIGERU

Stereo camera apparatus and vehicle-mountable monitoring apparatus using same

HAMANO YUKIKO

Optical pickup and optical information processing apparatus