Inventor
ISHIZUKA KOU
JP15 patents
Patents
15 patentsUS5880839AMar 9, 1999
Optical displacement measuring apparatus including a light-emitting element and an adjacent ball lens
CANON KK67 citations96
US6631047B2Oct 7, 2003
Interference device, position detecting device, positioning device and information recording apparatus using the same
CANON KK19 citations92
US6151185ANov 21, 2000
Position detecting apparatus, positioning apparatus, and information recording apparatus using the same
CANON KK26 citations92
US6005667ADec 21, 1999
Optical displacement measurement apparatus and information recording apparatus
CANON KK31 citations92
US5917182AJun 29, 1999
Rotation detector and controller for detecting rotation information using a grating interference system
CANON KK30 citations92
US5883384AMar 16, 1999
Rotational displacement information detection apparatus
CANON KK22 citations92
US5663794ASep 2, 1997
Displacement information detection apparatus, scale used in the apparatus, and drive apparatus using the apparatus
CANON KK49 citations92
US5534693AJul 9, 1996
Optical displacement detection apparatus employing diffraction gratings and a reference position sensor located on the scale
CANON KK52 citations92
US5956140ASep 21, 1999
Displacement detection apparatus and drive control apparatus using the same constructed to prevent collision between gratings
CANON KK28 citations91
US5930066AJul 27, 1999
Information recording apparatus
CANON KK19 citations84
US5742391AApr 21, 1998
Optical type sensor for use as an optical measuring head or optical pickup
CANON KK17 citations83
US6259531B1Jul 10, 2001
Displacement information measuring apparatus with hyperbolic diffraction grating
CANON KK9 citations74
US5067813ANov 26, 1991
Optical apparatus for measuring displacement of an object
CANON KK12 citations74
US6831267B2Dec 14, 2004
Optical encoder
CANON KK10 citations73
US6999179B2Feb 14, 2006
Optical encoder
CANON KK2 citations62