Inventor · disambiguated record
Hideaki Hirai
Also filed as: HIRAI HIDEAKI · OHUCHIDA SHIGERU
54 granted patents·10 pending applications·316 citations·filing 1999–2021
98Inventor score
Top patents by PatentIndex Score
64 records- 0195US6545958B1Optical-pickup device and tilt-detecting method thereofRICOH KK·Filed 1999·Granted Apr 8, 2003·87 cites·33 claims
- 0293US7197003B2Optical element, optical pickup unit, and optical disk drive unitRICOH KK·Filed 2006·Granted Mar 27, 2007·13 cites·19 claims
- 0392US7345967B2Optical pickup unitRICOH KK·Filed 2005·Granted Mar 18, 2008·11 cites·27 claims
- 0491US9025027B2Object identification device, moving object controlling apparatus having object identification device, information presenting apparatus having object identification device, and spectroscopic image capturing apparatusXUE LI·Filed 2011·Granted May 5, 2015·17 cites·12 claims
- 0589US7142497B2Optical pickup and optical information processing apparatus with light sources of three different wavelengthsRICOH KK·Filed 2003·Granted Nov 28, 2006·23 cites·14 claims
- 0688US7450486B2Optical pickup and optical information processing apparatusRICOH KK·Filed 2005·Granted Nov 11, 2008·7 cites·11 claims
- 0787US9344691B2Imaging device, object detecting apparatus, optical filter, and manufacturing method of optical filterHIRAI HIDEAKI·Filed 2012·Granted May 17, 2016·5 cites·10 claims
- 0886US9080986B2Transparent object detection system and transparent flat plate detection systemHIRAI HIDEAKI·Filed 2011·Granted Jul 14, 2015·6 cites·17 claims
- 0986US8831286B2Object identification deviceLI XUE·Filed 2011·Granted Sep 9, 2014·10 cites·10 claims
- 1086US7385906B2Objective lens, optical pickup, and optical information processing apparatus using the sameRICOH KK·Filed 2007·Granted Jun 10, 2008·5 cites·1 claims
- 1186US7050380B2Optical element, optical pickup unit, and optical disk drive unitRICOH KK·Filed 2002·Granted May 23, 2006·16 cites·5 claims
- 1285US9187063B2Detection apparatus and methodHIRAI HIDEAKI·Filed 2012·Granted Nov 17, 2015·6 cites·11 claims
- 1385US8379084B2Image pickupRICOH CO LTD·Filed 2009·Granted Feb 19, 2013·8 cites·17 claims
- 1484US8941835B2Foreign substance detection device, moving body control system including foreign substance detection device, and moving body including moving body control systemHIRAI HIDEAKI·Filed 2013·Granted Jan 27, 2015·5 cites·10 claims
- 1583US8178010B2Optical device and method of producing the sameHIRAI HIDEAKI·Filed 2010·Granted May 15, 2012·6 cites·2 claims
- 1680US7006411B2Optical pickup unit having electro-optical element and information recording and reproduction apparatusRICOH KK·Filed 2002·Granted Feb 28, 2006·11 cites·2 claims
- 1780US6735157B2Optical-pickup device and tilt-detecting method thereofRICOH KK·Filed 2003·Granted May 11, 2004·11 cites·19 claims
- 1879US7848209B2Optical pickup and optical information processing apparatus with light sources of three different wavelengthsRICOH CO LTD·Filed 2006·Granted Dec 7, 2010·3 cites·11 claims
- 1978US9317754B2Object identifying apparatus, moving body control apparatus, and information providing apparatusHIRAI HIDEAKI·Filed 2010·Granted Apr 19, 2016·8 cites·11 claims
- 2078US7457222B2Optical element, optical pickup unit, and optical disk drive unitRICOH KK·Filed 2007·Granted Nov 25, 2008·2 cites·6 claims
- 2177US7813233B2Information recording and reproduction apparatus including optical pickup unitRICOH KK·Filed 2007·Granted Oct 12, 2010·2 cites·18 claims
- 2277US7577070B2Optical recording medium tilt compensation device, tilt compensation method, and optical information recording apparatusRICOH KK·Filed 2006·Granted Aug 18, 2009·3 cites·17 claims
- 2373US8830585B2Optical element, polarization filter, optical isolator, and optical apparatusHIRAI HIDEAKI·Filed 2010·Granted Sep 9, 2014·4 cites·6 claims
- 2473US7697395B2Optical device, method of producing the same, optical pickup, and optical information processing deviceRICOH KK·Filed 2005·Granted Apr 13, 2010·2 cites·17 claims
- 2571US9215427B2Attached matter detector and in-vehicle device controller using the sameHIRAI HIDEAKI·Filed 2013·Granted Dec 15, 2015·2 cites·14 claims
- 2671US8320226B2Optical element having three or more sub-wavelength convexo-concave structuresHIRAI HIDEAKI·Filed 2009·Granted Nov 27, 2012·3 cites·11 claims
- 2769US9519841B2Attached matter detector and vehicle equipment control apparatusSAWAKI TAROH·Filed 2012·Granted Dec 13, 2016·3 cites·10 claims
- 2869US8351118B2Polarization splitting device, method of manufacturing polarization beam splitter, optical scanning device, and image forming apparatusRICOH CO LTD·Filed 2009·Granted Jan 8, 2013·4 cites·16 claims
- 2969US7492990B2Optical switching element, optical switching device, and color image displaying apparatusRICOH KK·Filed 2006·Granted Feb 17, 2009·5 cites·12 claims
- 3067US9057683B2Image pickup unit and vehicle in which image pickup unit is mountedITOH IZUMI·Filed 2012·Granted Jun 16, 2015·2 cites·11 claims
- 3166US8842211B2Imaging element and imaging apparatus that extract light of a specific wavelengthKASAHARA RYOSUKE·Filed 2010·Granted Sep 23, 2014·1 cites·12 claims
- 3266US8593631B2Spectral image acquiring apparatusHIRAI HIDEAKI·Filed 2011·Granted Nov 26, 2013·2 cites·14 claims
- 3365US8760501B2Stereo camera apparatus and vehicle-mountable monitoring apparatus using sameOOHCHIDA SHIGERU·Filed 2010·Granted Jun 24, 2014·3 cites·11 claims
- 3463US7796490B2Optical pickup and optical information processing apparatusRICOH KK·Filed 2008·Granted Sep 14, 2010·0 cites·12 claims
- 3562US7894133B2Optical element and optical deviceRICOH CO LTD·Filed 2007·Granted Feb 22, 2011·3 cites·12 claims
- 3661US8154976B2Reflecting wavelength plate and optical pickup using reflecting wavelength plateHIRAI HIDEAKI·Filed 2009·Granted Apr 10, 2012·0 cites·3 claims
- 3761US7738340B2Optical disk apparatus with aberration correcting part, and optical diskRICOH KK·Filed 2004·Granted Jun 15, 2010·4 cites·10 claims
- 3861US7596071B2Objective lens, optical pickup, and optical information processing apparatus using the sameRICOH KK·Filed 2007·Granted Sep 29, 2009·0 cites·3 claims
- 3960US7274646B2Object lens for an infinite-type optical pickup, optical pickup and optical information processing deviceRICOH KK·Filed 2002·Granted Sep 25, 2007·3 cites·10 claims
- 4059US8908038B2Vehicle detection device and vehicle detection methodLI XUE·Filed 2011·Granted Dec 9, 2014·2 cites·9 claims
- 4159US8269956B2Optical element, refractive index sensor, refractive index sensor array, and biosensorHASHIGUCHI TSUYOSHI·Filed 2009·Granted Sep 18, 2012·2 cites·11 claims
- 4259US7382715B2Optical recording medium having relationship between pit depths, wavelength and refractive indexRICOH KK·Filed 2004·Granted Jun 3, 2008·3 cites·2 claims
- 4359US2008008078A1Object lens for optical pickup, optical pickup and optical information processing deviceHIRAI HIDEAKI·Filed 2007·Application pending·0 cites
- 4457US8466960B2Liquid droplet recognition apparatus, raindrop recognition apparatus, and on-vehicle monitoring apparatusKOBAYASHI MASANORI·Filed 2010·Granted Jun 18, 2013·2 cites·10 claims
- 4555US7872957B2Optical pickup and optical data processing device using the sameRICOH CO LTD·Filed 2009·Granted Jan 18, 2011·0 cites·3 claims
- 4654US7929398B2Optical pickup and optical data processing device using the sameRICOH CO LTD·Filed 2009·Granted Apr 19, 2011·0 cites·5 claims
- 4754US2011002215A1Optical pickup device and optical information processing apparatus using the optical pickup deviceHIRAI HIDEAKI·Filed 2009·Application pending·0 cites
- 4853US7313074B2Objective lens, optical, pickup and optical information processing apparatus using the sameRICOH KK·Filed 2004·Granted Dec 25, 2007·1 cites·7 claims
- 4950US7406023B2Optical reproduction method, optical pickup device, optical reproduction device, and optical recording mediumRICOH KK·Filed 2005·Granted Jul 29, 2008·0 cites·12 claims
- 5049US8259555B2Optical pickup and optical information processing deviceHAMANO YUKIKO·Filed 2008·Granted Sep 4, 2012·0 cites·13 claims
Showing the top 50 of 64 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →