Inventor
KAMISADA TOSHIMASA
JP21 patents
⚠️ This page may combine multiple inventors who share the name “KAMISADA TOSHIMASA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
10 patentsUS4742218AMay 3, 1988
Focus error detection apparatus utilizing focusing an front and rear sides of focal planes
HITACHI LTD44 citations91
US7076791B2Jul 11, 2006
Optical pickup and optical disc apparatus provided with the same
HITACHI LTD15 citations83
US6985424B1Jan 10, 2006
Laser module and optical head
HITACHI LTD7 citations74
US5668786ASep 16, 1997
Magneto-optic disk apparatus having means for eliminating fluctuation component in reproduction magneto-optic signal
HITACHI LTD11 citations74
US4841509AJun 20, 1989
Apparatus and method for detecting focus error signal and tracking error signal in an optical disk system
HITACHI LTD13 citations74
US5555539ASep 10, 1996
Multi-beam split-type optical head for use in optical disk apparatus
HITACHI LTD14 citations73
US5060213AOct 22, 1991
Separation type optical head
HITACHI LTD10 citations73
US7245574B2Jul 17, 2007
Optical head and its adjusting method and optical disk device using the same
HITACHI LTD7 citations71
US7379397B2May 27, 2008
Optical pickup and optical disc apparatus provided with the same
HITACHI LTD2 citations62
US7542396B2Jun 2, 2009
Information recording apparatus, information recording medium and information recording medium
HITACHI LTD4 citations60
HITACHI MEDIA ELECTRON KK
6 patentsUS7567495B2Jul 28, 2009
Optical pickup apparatus and optical disc apparatus using same
HITACHI MEDIA ELECTRON KK5 citations73
US8014258B2Sep 6, 2011
Optical pickup having radially arranged lenses in a low profile construction
HITACHI MEDIA ELECTRON KK0 citations51
US7978587B2Jul 12, 2011
Optical pickup apparatus and optical disc apparatus with a single beam system
HITACHI MEDIA ELECTRON KK0 citations51
US7940630B2May 10, 2011
Optical pick up apparatus with a single beam system and having a diffraction grating
HITACHI MEDIA ELECTRON KK0 citations51
US7885166B2Feb 8, 2011
Optical pick up apparatus with a single beam system and having a diffraction grating
HITACHI MEDIA ELECTRON KK0 citations51
US7733760B2Jun 8, 2010
Optical pickup having radially arranged lenses in a low profile construction
HITACHI MEDIA ELECTRON KK0 citations51
HITACHI LG DATA STORAGE INC
3 patentsUS10838063B2Nov 17, 2020
Distance measurement apparatus and angle adjustment method of the same
HITACHI LG DATA STORAGE INC5 citations72
US11531102B2Dec 20, 2022
Distance measurement image pickup apparatus
HITACHI LG DATA STORAGE INC1 citations62
US10614584B2Apr 7, 2020
Three-dimensional distance measurement apparatus
HITACHI LG DATA STORAGE INC1 citations62