Inventor
OOHCHIDA SHIGERU
JP8 patents
⚠️ This page may combine multiple inventors who share the name “OOHCHIDA SHIGERU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
7 patentsUS6584060B1Jun 24, 2003
Optical pick-up device for recording/reading information on optical recording medium
RICOH KK46 citations95
US7164532B2Jan 16, 2007
Diffraction grating, light source unit applying the same therein, and optical head device employing the same
RICOH KK13 citations83
US6822771B2Nov 23, 2004
Optical pickup unit and optical disk drive for accurate and stable information recording and reproduction
RICOH KK19 citations83
US7110180B2Sep 19, 2006
Diffraction grating, method of fabricating diffraction optical element, optical pickup device, and optical disk drive
RICOH KK10 citations72
US6845077B2Jan 18, 2005
Optical pick-up device with convergent light diffraction for recording/reading information on optical recording medium
RICOH KK4 citations62
US7511887B2Mar 31, 2009
Diffraction grating, method of fabricating diffraction optical element, optical pickup device, and optical disk drive
RICOH KK2 citations61
US7577076B2Aug 18, 2009
Tilt sensor using diffraction grating
RICOH KK5 citations58