P

Inventor

ISHIZUKA KO

US29 patents
⚠️ This page may combine multiple inventors who share the name “ISHIZUKA KO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CANON KK

21 patents
US5666196ASep 9, 1997

Optical detection apparatus for detecting information relating to relative displacement of an object on whch a diffraction grating is formed

CANON KK174 citations99
US7061624B2Jun 13, 2006

Grating interference type optical encoder

CANON KK24 citations92
US6674066B1Jan 6, 2004

Encoder

CANON KK20 citations92
US6618218B1Sep 9, 2003

Displacement detecting apparatus and information recording apparatus

CANON KK28 citations92
US6493170B1Dec 10, 2002

Interference device and position detection device using the same

CANON KK20 citations92
US5481106AJan 2, 1996

Encoder with an optical scale and interference of zero and first order diffraction beams

CANON KK32 citations92
US5448358ASep 5, 1995

Optical apparatus and displacement-information measuring apparatus using the same

CANON KK34 citations92
US6958469B2Oct 25, 2005

Diffraction grating interference system encoder for detecting displacement information

CANON KK13 citations84
US6473184B1Oct 29, 2002

Interferometer which divides light beams into a plurality of beams with different optical paths

CANON KK15 citations84
US7391521B2Jun 24, 2008

Position detection apparatus and method

CANON KK8 citations74
US5198873AMar 30, 1993

Encoder utilizing interference using multi-mode semiconductor laser

CANON KK16 citations74
US6657181B1Dec 2, 2003

Optical element used in compact interference measuring apparatus detecting plurality of phase difference signals

CANON KK11 citations73
US6570660B2May 27, 2003

Measuring instrument

CANON KK9 citations73
US7554671B2Jun 30, 2009

Absolute position measurement apparatus

CANON KK4 citations63
US7551290B2Jun 23, 2009

Absolute position measurement apparatus

CANON KK3 citations63
US7259863B2Aug 21, 2007

Grating interference type optical encoder

CANON KK2 citations63
US7375820B2May 20, 2008

Interference measuring apparatus for detecting a plurality of stable phase difference signals

CANON KK2 citations62
US7034947B2Apr 25, 2006

Compact interference measuring apparatus for detecting the magnitude and direction of positional deviation

CANON KK2 citations62
US9810555B2Nov 7, 2017

Absolute encoder that provides increased accuracy against defect in scale thereof

CANON KK0 citations52
US7054095B2May 30, 2006

Displacement detection apparatus, and magnetic recording apparatus and encoder using the displacement detection apparatus

CANON KK1 citations52
US9267820B2Feb 23, 2016

Two-dimensional absolute encoder and scale with marks each having one of a plurality of different characteristic values

CANON KK0 citations37

ISHIZUKA KO

8 patents