Inventor
KAWAKITA SATOSHI
JP4 patents
Patents
4 patentsUS6215591B1Apr 10, 2001
Lens manufacturing method thereof, and optical pickup
SONY CORP9 citations72
US6783707B2Aug 31, 2004
Lens, manufacturing method thereof, and optical pickup
SONY CORP3 citations61
US7715300B2May 11, 2010
Diffraction element, objective lens unit, optical pickup and optical disc apparatus
SONY CORP0 citations49
US7463430B2Dec 9, 2008
Diffraction element, objective lens unit, optical pickup, optical disc apparatus and design method for diffraction element
SONY CORP1 citations49